KR102563789B1 - Active current compensation device including integrated circuit unit and non-integrated circuit unit - Google Patents

Abstract

The present invention provides an active current compensating device for actively compensating for noise generated in a common mode in each of at least two high current paths, comprising: at least two or more high current paths for transferring power supplied by a second device to a first device; , a sensing unit generating an output signal corresponding to the common mode noise current on the high current path, an amplifying unit generating an amplified current by amplifying the output signal, and generating a compensation current based on the amplified current, and the compensation and a compensating unit for allowing current to flow through each of the at least two high current paths, wherein the amplification unit includes a non-integrated circuit unit and a one-chip integrated circuit unit, wherein the non-integrated circuit unit connects the first device and the one-chip integrated circuit unit to each other. Designed according to the power system of at least one of the second devices, the single chip integrated circuit provides an active current compensation device that is independent of the rated power specifications of the first device and the second device.

Description

Active current compensation device including integrated circuit unit and non-integrated circuit unit

Embodiments of the present invention relate to an active current compensation device including an integrated circuit part and a non-integrated circuit part, and to an active current compensation device that actively compensates for noise input in a common mode on two or more high current paths connected to a power system. it's about

In general, electric devices such as home appliances, industrial electric appliances, or electric vehicles emit noise while operating. For example, noise may be emitted through a power line due to a switching operation of a power converter in an electronic device. If such noise is left unattended, it is not only harmful to the human body, but also causes malfunction or failure of peripheral parts and other electronic devices. As such, electromagnetic interference that an electronic device has on other devices is called EMI (Electromagnetic Interference), and among them, noise transmitted via wires and board wiring is called Conducted Emission (CE) noise.

In order for electronic devices to operate without causing failure to peripheral parts and other devices, EMI noise emissions are strictly regulated in all electronic products. Accordingly, most electronic products necessarily include a noise reduction device (eg, an EMI filter) for reducing EMI noise current in order to satisfy regulations on noise emission. For example, in white goods such as air conditioners, electric vehicles, aviation, energy storage systems (ESS), etc., EMI filters are necessarily included. A conventional EMI filter uses a common mode choke (CM choke) to reduce common mode (CM) noise among conducted emission (CE) noise. The common mode (CM) choke is a passive filter that 'suppresses' the common mode noise current.

Meanwhile, in order to maintain the noise reduction performance of the passive EMI filter in a high-power system, the size or number of common mode chokes must be increased. This significantly increases the size and cost of passive EMI filters in high-power products.

In order to overcome the limitations of the above passive EMI filters, interest in active EMI filters has emerged. An active EMI filter can remove EMI noise by detecting EMI noise and generating a signal that cancels out the noise. An active EMI filter includes an active circuit capable of generating an amplified signal from a sensed noise signal.

Meanwhile, in order to actually apply active EMI filters to electronic products, mass production of semiconductor devices is required to meet various demands. If discrete devices (or components) are used to manufacture an active EMI filter for actual use, the number of devices for active circuits increases and various components are required to improve the function of the active EMI filter. Therefore, there is a problem in that the size and cost of the active EMI filter increases in order to achieve a higher function.

Therefore, in order to overcome these problems, an active EMI filter using a customized integrated circuit (IC) that can be used in various power systems is required.

The present invention has been made to overcome the above problems, and an object of the present invention is to provide an active current compensation device including an integrated circuit unit and a non-integrated circuit unit. The integrated circuit part may be a single chip including essential components of an active current compensation device, and the non-integrated circuit part may be a component for implementing active EMI filters of various designs.

However, these tasks are illustrative, and the scope of the present invention is not limited thereby.

According to an embodiment of the present invention, an active current compensating device for actively compensating for noise generated in a common mode in each of at least two high current paths includes at least two devices that deliver power supplied by a second device to a first device. more than one large current path; a sensing unit generating an output signal corresponding to the common mode noise current on the high current path; an amplification unit generating an amplification current by amplifying the output signal; and a compensating unit generating a compensating current based on the amplified current and allowing the compensating current to flow through each of the at least two high current paths, wherein the amplifying unit is a non-integrated circuit unit and a one-chip integrated circuit. a circuit portion, wherein the non-integrated circuit portion is designed according to a power system of at least one of the first device and the second device, and wherein the single-chip integrated circuit portion conforms to rated power specifications of the first device and the second device. can be irrelevant

According to an embodiment, the non-integrated circuit unit may be designed according to the rated power of the first device.

According to an embodiment, the one-chip integrated circuit unit may include a first transistor, a second transistor, and one or more resistors.

According to an embodiment, the non-integrated circuit unit may include a first impedance (Z ₁ ) connecting an emitter node side of the first transistor and the second transistor and an input terminal of the compensation unit, the first transistor and the second transistor. A second impedance (Z ₂ ) connecting the base node side of the transistor and the input terminal of the compensation unit may be included.

According to an embodiment, the sensing unit includes a sensing transformer, the compensating unit includes a compensating transformer, and the value of the first impedance or the value of the second impedance is a winding ratio of the sensing transformer and the compensating transformer, and It is determined based on the target current gain of the amplification unit, and the configuration of the single-chip integrated circuit unit may be independent of the winding ratio and the target current gain.

According to an embodiment, according to the design of the first impedance and the second impedance, the single chip integrated circuit part can be used for first devices of various power systems.

Other aspects, features and advantages other than those described above will become apparent from the following drawings, claims and detailed description of the invention.

The active current compensation device according to various embodiments of the present invention configured as described above can reduce the price, area, volume, weight, and heat generation compared to a passive filter composed of a CM choke in a high power system.

In addition, the size of the active current compensation device according to various embodiments of the present disclosure is minimized compared to a case in which a discrete semiconductor device is included.

In addition, the integrated circuit unit according to various embodiments of the present invention can be universally applied to active current compensation devices of various designs.

In addition, an active current compensation device including an integrated circuit unit according to various embodiments of the present invention may be used in various power electronic products regardless of power rating. Therefore, the active current compensation device according to various embodiments of the present invention can be extended to a high-power and high-noise system.

In addition, an active current compensation device including an integrated circuit unit according to various embodiments of the present disclosure may be easily mass-produced.

In addition, the active current compensation device and/or the one-chip integrated circuit unit according to various embodiments of the present invention can be commercialized with versatility as an independent module.

Of course, the scope of the present invention is not limited by these effects.

1 schematically shows the configuration of a system including an active current compensation device 100 according to an embodiment of the present invention.
FIG. 2 shows a more specific example of the embodiment shown in FIG. 1, and schematically illustrates an active current compensation device 100A according to an embodiment of the present invention.
FIG. 3 shows a more specific example of the embodiment shown in FIG. 2 and schematically illustrates an active current compensation device 100A-1 according to an embodiment of the present invention.
4 schematically shows the configuration of an active current compensation device 100A-2 according to another embodiment of the present invention.
5 schematically shows the configuration of an active current compensation device 100A-3 according to another embodiment of the present invention.
6 schematically shows the configuration of an active current compensation device 100B according to another embodiment of the present invention.

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and methods for achieving them will become clear with reference to the embodiments described later in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when describing with reference to the drawings, the same or corresponding components are assigned the same reference numerals, and overlapping descriptions thereof will be omitted. .

In the following embodiments, terms such as first and second are used for the purpose of distinguishing one component from another component without limiting meaning. In the following examples, expressions in the singular number include plural expressions unless the context clearly dictates otherwise. In the following embodiments, terms such as include or have mean that features or components described in the specification exist, and do not preclude the possibility that one or more other features or components may be added. In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. In the following embodiments, when components, parts, units, modules, etc. are connected, not only when components, parts, units, and modules are directly connected, but also other components in the middle of the components, parts, units, and modules. , It also includes cases where parts, units, and modules are interposed and indirectly connected.

1 schematically shows the configuration of a system including an active current compensation device 100 according to an embodiment of the present invention. The active current compensation device 100 includes first currents I11 and I12 (e.g., EMI noise current) can be actively compensated.

Referring to FIG. 1 , the active current compensator 100 may include a sensing unit 120 , an amplifier 130 , and a compensation unit 160 .

In this specification, the first device 300 may be various types of power systems using power supplied by the second device 200 . For example, the first device 300 may be a load driven using power supplied by the second device 200 . Also, the first device 300 may be a load (eg, an electric vehicle) that stores energy using power supplied by the second device 200 and is driven using the stored energy. However, it is not limited thereto.

In this specification, the second device 200 may be various types of systems for supplying power to the first device 300 in the form of current and/or voltage. The second device 200 may be a device that supplies stored energy. However, it is not limited thereto.

A power conversion device may be located on the side of the first device 300 . For example, the first currents I11 and I12 may be input to the current compensating device 100 by a switching operation of the power conversion device. That is, the side of the first device 300 may correspond to a noise source, and the side of the second device 200 may correspond to a noise receiver.

The two or more high current paths 111 and 112 may be paths for transferring the power supplied by the second device 200, that is, the second currents I21 and I22 to the first device 300, for example, they may be power lines. there is. For example, each of the two or more high current paths 111 and 112 may be a live line and a neutral line. At least some of the high current paths 111 and 112 may pass through the current compensating device 100 . The second currents I21 and I22 may be alternating currents having a frequency of the second frequency band. The second frequency band may be, for example, a 50Hz to 60Hz band.

In addition, the two or more high current paths 111 and 112 may be paths through which noise generated in the first device 300, that is, the first currents I11 and I12 are transferred to the second device 200. The first currents I11 and I12 may be input in a common mode to each of the two or more high current paths 111 and 112 . The first currents I11 and I12 may be currents unintentionally generated in the first device 300 for various reasons. For example, the first currents I11 and I12 may be noise currents generated by virtual capacitance between the first device 300 and the surrounding environment. Alternatively, the first currents I11 and I12 may be noise currents generated by a switching operation of the power conversion device of the first device 300 . The first currents I11 and I12 may be currents having a frequency of the first frequency band. The first frequency band may be a higher frequency band than the aforementioned second frequency band. The first frequency band may be, for example, a 150 KHz to 30 MHz band.

Meanwhile, the two or more high current paths 111 and 112 may include two paths as shown in FIG. 1 , or may include three paths or four paths as shown in FIGS. 4 and 6 . The number of high current paths 111 and 112 may vary depending on the type and/or form of power used by the first device 300 and/or the second device 200 .

The sensing unit 120 may sense the first currents I11 and I12 on the two or more high current paths 111 and 112 and generate output signals corresponding to the first currents I11 and I12. That is, the sensing unit 120 may mean a means for sensing the first currents I11 and I12 on the high current paths 111 and 112 . Although at least a part of the high current paths 111 and 112 may pass through the sensing unit 120 to sense the first currents I11 and I12, an output signal by sensing within the sensing unit 120 is generated. Part may be insulated from the high current path (111, 112). For example, the sensing unit 120 may be implemented as a sensing transformer. The sensing transformer may sense the first currents I11 and I12 on the high current paths 111 and 112 while being insulated from the high current paths 111 and 112 . However, the sensing unit 120 is not limited to a sensing transformer.

According to an embodiment, the sensing unit 120 may be differentially connected to an input terminal of the amplifying unit 130 .

The amplifier 130 may be electrically connected to the sensing unit 120 to amplify an output signal output by the sensing unit 120 and generate an amplified output signal. In the present invention, 'amplification' by the amplifier 130 may mean adjusting the size and/or phase of an amplification target. The amplifier 130 may be implemented by various means and may include an active element. In one embodiment, the amplifier 130 may include a bipolar junction transistor (BJT). For example, the amplifier 130 may include a plurality of passive elements such as resistors and capacitors in addition to the BJT. However, it is not limited thereto, and the means for 'amplification' described in the present invention may be used without limitation as the amplifier 130 of the present invention.

According to an embodiment, the second reference potential 602 of the amplifier 130 and the first reference potential 601 of the current compensation device 100 may be distinguished from each other. For example, when the amplification unit 130 is insulated from the high current paths 111 and 112, the second reference potential 602 of the amplification unit 130 and the first reference potential 601 of the current compensation device 100 can be distinguished from each other.

However, the present invention is not limited thereto. For example, when the amplification unit 130B is not insulated from the high current paths 111 and 112 as shown in FIG. 6, the reference potential of the amplification unit 130B and the reference potential of the current compensation device 100B may not be distinguished. there is.

The amplifier 130 according to various embodiments of the present invention may include an integrated circuit unit 131 and a non-integrated circuit unit 132 . The integrated circuit unit 131 may include essential components of the active current compensation device 100 . Essential components may include, for example, active elements. Therefore, the active element included in the amplification unit 130 may be integrated into the integrated circuit unit 131 of the amplification unit 130 . Among the amplifiers 130, the non-integrated circuit unit 132 may not include an active element. The integrated circuit unit 131 may further include passive elements as well as active elements.

The integrated circuit unit 131 according to an embodiment of the present invention may be physically a single IC chip. The integrated circuit unit 131 according to an embodiment of the present invention can be applied to the active current compensation device 100 of various designs. The one-chip integrated circuit unit 131 according to the embodiment of the present invention, as an independent module, has versatility and can be applied to the current compensation device 100 of various designs.

The non-integrated circuit unit 132 according to the embodiment of the present invention may be modified according to the design of the active current compensation device 100.

The integrated circuit unit 131 may include a terminal to be connected to the non-integrated circuit unit 132 . The integrated circuit unit 131 and the non-integrated circuit unit 132 may be coupled together to function as the amplifying unit 130 . The combination of the integrated circuit unit 131 and the non-integrated circuit unit 132 may perform a function of generating an amplified signal from an output signal output from the sensing unit 120 . The amplified signal may be input to the compensator 160 .

Examples of detailed configurations of the amplifier 130 including the integrated circuit unit 131 and the non-integrated circuit unit 132 will be described later with reference to FIGS. 3 to 6 .

As described above, the active current compensation device 100 according to various embodiments is characterized in that it is divided into an integrated circuit part and a non-integrated circuit part.

The amplifier 130 may receive power from a power supply 400 that is distinct from the first device 300 and/or the second device 200 . The amplifier 130 may generate an amplified current by receiving power from the power supply 400 and amplifying an output signal output by the sensing unit 120 .

The power device 400 may be a device that receives power from a power source independent of the first device 300 and the second device 200 and generates input power for the amplifier 130 . Optionally, the power supply 400 may be a device that receives power from any one of the first device 300 and the second device 200 and generates input power for the amplifier 130 .

The integrated circuit unit 131, which is an IC chip, may include a terminal connected to the power supply 400, a terminal connected to the second reference potential 602, and a terminal connected to the non-integrated circuit unit 132.

The compensation unit 160 may generate compensation currents IC1 and IC2 based on the output signal amplified by the amplification unit 130 . The output side of the compensator 160 may be connected to the high current paths 111 and 112 to flow the compensating currents IC1 and IC2 to the high current paths 111 and 112 .

According to an embodiment, the output side of the compensating unit 160 may be insulated from the amplifying unit 130 . For example, the compensation unit 160 may include a compensation transformer for the insulation. For example, an output signal of the amplifier 130 may flow to the primary side of the compensation transformer, and a compensation current based on the output signal may be generated to the secondary side of the compensation transformer.

However, the present invention is not limited thereto. According to another embodiment, as shown in FIG. 6 , the output side of the compensating unit 160B may be non-insulated from the amplifying unit 130B. In this case, the amplifier 130B may be non-insulated from the high current paths 111 and 112 .

Referring back to FIG. 1 , the compensation unit 160 transmits the compensating currents IC1 and IC2 through two or more high current paths 111 and 112, respectively, in order to cancel the first currents I11 and I12. 112) can be injected. The compensation currents IC1 and IC2 may have the same magnitude and opposite phases to the first currents I11 and I12.

FIG. 2 shows a more specific example of the embodiment shown in FIG. 1, and schematically illustrates an active current compensation device 100A according to an embodiment of the present invention. The active current compensation device 100A actively applies first currents I11 and I12 (eg, noise current) input in a common mode to each of the two large current paths 111 and 112 connected to the first device 300. can compensate

Referring to FIG. 2 , the active current compensation device 100A may include a sensing transformer 120A, an amplifier 130, and a compensator 160A.

In one embodiment, the aforementioned sensing unit 120 may include a sensing transformer 120A. In this case, the sensing transformer 120A may be a means for sensing the first currents I11 and I12 on the high current paths 111 and 112 while being insulated from the high current paths 111 and 112 . The sensing transformer 120A may sense first currents I11 and I12 that are noise currents input from the side of the first device 300 to the high current paths 111 and 112 (eg, power lines).

The sensing transformer 120A may include a primary side 121A disposed on the high current paths 111 and 112 and a secondary side 122A differentially connected to the input terminal of the amplifier 130. there is. The sensing transformer 120A generates 2 values based on the magnetic flux density induced by the first currents I11 and I12 in the primary side 121A (eg, the primary winding) disposed on the high current paths 111 and 112. An induced current may be generated on the secondary side 122A (eg, the secondary winding). The primary side 121A of the sensing transformer 120A may be, for example, a winding in which the first high current path 111 and the second high current path 112 are wound around one core. However, the present invention is not limited thereto, and the primary side 121A of the sensing transformer 120A may have a first high current path 111 and a second high current path 112 passing through the core.

Specifically, the magnetic flux density induced by the first current I11 on the first high current path 111 (eg live line) and the first current I12 on the second high current path 112 (eg neutral line) The magnetic flux densities induced by may be configured to overlap (or reinforce) each other. At this time, the second currents I21 and I22 also flow on the high current paths 111 and 112, and the magnetic flux density induced by the second current I21 on the first high current path 111 and the second high current path 112 ) may be configured such that magnetic flux densities induced by the first current I22 cancel each other. In addition, for example, the sensing transformer 120A has a magnetic flux density induced by the first currents I11 and I12 of the first frequency band (eg, a band having a range of 150 KHz to 30 MHz) at the second frequency band. It may be configured to be greater than the magnitude of the magnetic flux density induced by the second currents I21 and I22 of the band (eg, a band having a range of 50 Hz to 60 Hz).

As such, the sensing transformer 120A is configured such that magnetic flux densities induced by the second currents I21 and I22 cancel each other, so that only the first currents I11 and I12 are sensed. That is, the current induced in the secondary side 122A of the sensing transformer 120A may be a current obtained by converting the first currents I11 and I12 at a constant ratio.

For example, in the sensing transformer 120A, the winding ratio of the primary side 121A and the secondary side 122A is 1:N _sen , and the self inductance of the primary side 121A of the sensing transformer 120A is L If _sen is used, the secondary side 122A may have a self inductance of N _sen ² ·L _sen . At this time, the current induced in the secondary side 122A is 1/N _sen times the first currents I11 and I12. For example, the primary side 121A and the secondary side 122A of the sensing transformer 120A may be coupled with a coupling coefficient of k _sen .

The secondary side 122A of the sensing transformer 120A may be connected to an input terminal of the amplifier 130 . For example, the secondary side 122A of the sensing transformer 120A may be differentially connected to an input terminal of the amplification unit 130 to supply an induced current or an induced voltage to the amplification unit 130 .

The amplifier 130 may amplify a current or induced voltage sensed by the sensing transformer 120A and induced in the secondary side 122A. For example, the amplification unit 130 may amplify the magnitude of the induced current or induced voltage at a predetermined rate and/or adjust the phase.

According to various embodiments of the present invention, the amplification unit 130 may include an integrated circuit unit 131 composed of one IC chip and a non-integrated circuit unit 132 other than the IC chip.

According to an embodiment, the amplification unit 130 may be connected to the second reference potential 602, and the second reference potential 602 is the first reference potential of the current compensating device 100 (or the compensating unit 160A). It can be distinguished from the potential 601. The amplifier 130 may be connected to the power supply 400 .

The IC chip, which is the integrated circuit unit 131, may include a terminal to be connected to the power supply device 400, a terminal to be connected to the second reference potential 602, and a terminal to be connected to the non-integrated circuit unit 132. .

The compensating unit 160A may be an example of the compensating unit 160 described above. In one embodiment, the compensation unit 160A may include a compensation transformer 140A and a compensation capacitor unit 150A. The amplified current amplified by the amplification unit 130 described above flows to the primary side 141A of the compensation transformer 140A.

The compensation transformer 140A according to an embodiment may be a means for insulating the amplifier 130 including an active element from the high current paths 111 and 112 . That is, the compensation transformer 140A generates a compensation current (to the secondary side 142A) for injection into the high current paths 111 and 112 based on the amplified current in a state insulated from the high current paths 111 and 112. may be a means for

The compensation transformer 140A may include a primary side 141A differentially connected to the output terminal of the amplifier 130 and a secondary side 142A connected to the high current paths 111 and 112. there is. Compensation transformer 140A induces a compensating current in secondary side 142A (eg, secondary winding) based on the magnetic flux density induced by the amplified current flowing through primary side 141A (eg, primary winding). can do.

In this case, the secondary side 142A may be disposed on a path connecting the compensation capacitor unit 150A and the first reference potential 601 of the current compensating device 100A. That is, one end of the secondary side 142A is connected to the high current paths 111 and 112 through the compensation capacitor unit 150A, and the other end of the secondary side 142A is connected to the active current compensation device 100A. 1 can be connected to the reference potential 601. Meanwhile, the primary side 141A of the compensation transformer 140A, the amplifier 130, and the secondary side 122A of the sensing transformer 120A are distinguished from the other components of the active current compensation device 100A. It may be connected to the second reference potential 602 . The first reference potential 601 of the current compensating device 100A and the second reference potential 602 of the amplifier 130 according to an exemplary embodiment may be distinguished.

As such, the current compensating device 100A according to an embodiment uses a reference potential different from the rest of the components (ie, the second reference potential 602) for a component generating the compensation current, and a separate power supply ( 400), components that generate compensating current can be operated in an insulated state, thereby improving the reliability of the active current compensation device 100A. However, the active compensation device including the integrated circuit unit 131 and the non-integrated circuit unit 132 according to the present invention is not limited to this insulating structure. An active current compensation device 100B having a non-insulation structure according to another embodiment of the present invention will be described later with reference to FIG. 6 .

In the compensation transformer 140A according to an embodiment, the winding ratio of the primary side 141A and the secondary side 142A is 1:N _inj , and the self inductance of the primary side 141A of the compensation transformer 140A is If L _inj , the secondary side 142A may have a self inductance of N _inj ² ·L _inj . At this time, the current induced in the secondary side 142A is 1/N _inj times the current flowing in the primary side 141A (ie, the amplified current). The primary side 141A and the secondary side 142A of the compensation transformer 140A may be coupled with a coupling coefficient of k _inj .

The current converted through the compensation transformer 140A may be injected as compensation currents IC1 and IC2 into the high current paths 111 and 112 (eg, power lines) through the compensation capacitor unit 150A. Accordingly, the compensating currents IC1 and IC2 may have the same magnitude as the first currents I11 and I12 and may have opposite phases in order to cancel the first currents I11 and I12. Therefore, the size of the current gain of the amplifier 130 can be designed to be N _sen N _inj .

As described above, the compensation capacitor unit 150A may provide a path through which the current generated by the compensation transformer 140A flows to each of the two large current paths 111 and 112 .

The compensation capacitor unit 150A includes two Y-capacitors having one end connected to the secondary side 142A of the compensation transformer 140A and the other end connected to the high current paths 111 and 112. Y-cap) may be included. One end of each of the two Y-caps shares a node connected to the secondary side 142A of the compensation transformer 140A, and the opposite ends of each of the two Y-caps form the first high current path 111 and the second side 142A, respectively. 2 may have a node connected to the high current path 112 .

The compensation capacitor unit 150A may flow the compensation currents IC1 and IC2 induced by the compensation transformer 140A to the power line. As the compensating currents IC1 and IC2 compensate (or cancel) the first currents I11 and I12, the current compensating device 100A can reduce noise.

Meanwhile, the compensation capacitor unit 150A may be configured such that the current IL1 flowing between the two high current paths 111 and 112 through the compensation capacitor is less than the first threshold level. In addition, the compensation capacitor unit 150A may be configured such that the current IL2 flowing between each of the two high current paths 111 and 112 and the first reference potential 601 through the compensation capacitor is less than the second threshold level.

An active current compensator 100A according to an embodiment may realize an isolated structure by using a compensation transformer 140A and a sensing transformer 120A.

FIG. 3 shows a more specific example of the embodiment shown in FIG. 2 and schematically illustrates an active current compensation device 100A-1 according to an embodiment of the present invention. The active current compensator 100A-1 shown in FIG. 3 is an example of the active current compensator 100A shown in FIG. 2 . The amplifier 130A included in the active current compensator 100A-1 is an example of the amplification unit 130 of the active current compensator 100A.

An active current compensation device 100A-1 according to an embodiment may include a sensing transformer 120A, an amplification unit 130A, a compensation transformer 140A, and a compensation capacitor unit 150A. In one embodiment, the active current compensation device 100A-1 may further include a decoupling capacitor unit 170A on the output side (ie, the second device 200 side). In other embodiments, the decoupling capacitor unit 170A may be omitted. Descriptions of the sensing transformer 120A, the compensation transformer 140A, and the compensation capacitor unit 150A are redundant and thus omitted.

The amplification unit 130A of the active current compensation device 100A-1 according to an embodiment may include an integrated circuit unit 131A and a non-integrated circuit unit. Components other than the integrated circuit unit 131A in the amplification unit 130A may be included in the non-integrated circuit unit. For example, components included in the non-integrated circuit unit in the amplification unit 130A may be discrete commercial devices, but are not limited thereto.

In one embodiment, the integrated circuit unit 131A may include a first transistor 11 , a second transistor 12 , and/or one or more resistors. In one embodiment, the first transistor 11 may be a npn BJT, and the second transistor 12 may be a pnp BJT. For example, the amplifier 130A may have a push-pull amplifier structure including an npn BJT and a pnp BJT.

For example, one or more resistors included in the integrated circuit unit 131A may include R _npn , R _pnp , and/or R _e . For example, the resistor R _npn may connect the collector terminal and the base terminal of the first transistor 11, the resistor R _pnp may connect the collector terminal and the base terminal of the second transistor 12, and the resistor R _e may connect the first transistor The emitter terminal of (11) and the emitter terminal of the second transistor 12 may be connected.

In one embodiment, the integrated circuit unit 131A of the amplification unit 130A may further include a diode 13 in addition to the first transistor 11, the second transistor 12, and one or more resistors. For example, one end of the diode 13 may be connected to the base end of the first transistor 11 and the other end of the diode 13 may be connected to the base end of the second transistor 12 . In an alternative embodiment, diode 13 may be replaced with a resistor.

In one embodiment, resistors R _npn , R _pnp , R _e , and/or the biasing diode 13 included in the integrated circuit unit 131A may be used for DC bias of the BJT. Since the components are universal components in various active current compensation devices, they can be integrated into a one-chip integrated circuit unit 131A.

Components other than the integrated circuit unit 131A in the amplification unit 130A may be included in the non-integrated circuit unit. The integrated circuit unit 131A may be physically implemented as a single IC chip. The non-integrated circuit unit may be composed of discrete commercial devices. The non-integrated circuit unit may be implemented differently according to embodiments.

In the embodiment shown in FIG. 3 , the non-integrated circuit unit may include, for example, capacitors C _b , C _e , and C _dc , and impedances Z ₁ and Z ₂ .

In one embodiment, the induced current induced in the secondary side 122A by the sensing transformer 120A may be differentially input to the amplifier 130A. Capacitors C _b and C _e included in the amplifier 130A may selectively couple only AC signals. Capacitors C _b and C _e may block DC voltage at the base node and the emitter node of the first and second transistors 11 and 12 .

In one embodiment, the power supply device 400 supplies a direct current (DC) voltage V _dc based on the second reference potential 602 to drive the amplifier 130A. The capacitor C _dc is a DC decoupling capacitor for the voltage V _dc and may be connected in parallel between the power supply 400 and the second reference potential 602 . The capacitor C _dc may selectively couple an AC signal between both collectors of the first transistor 11 (eg, npn BJT) and the second transistor 12 (eg, pnp BJT).

A current gain of the amplifier 130A may be controlled by a ratio of impedances Z ₁ and Z ₂ . Accordingly, Z ₁ and Z ₂ may be implemented outside the one-chip integrated circuit unit 131A. Z ₁ and Z ₂ may be flexibly designed according to a required target current gain according to the winding ratio of the sensing transformer 120A and the compensating transformer 140A.

In the integrated circuit unit 131A, the resistors R _npn , R _pnp , and R _e may adjust operating points of the first and second transistors 11 and 12 (eg, BJT). Resistors R _npn , R _pnp , and R _e can be designed according to the operating point of the BJT. The resistor R _npn is a collector terminal of the first transistor 11 (eg npn BJT) and a terminal of the power supply 400 and a base terminal of the first transistor 11 (eg npn BJT). can connect The resistor R _pnp is a collector terminal of the second transistor 12 (eg, pnp BJT) and connects the second reference potential 602 and the base terminal of the second transistor 12 (eg, pnp BJT). can The resistor R _e may connect an emitter terminal of the first transistor 11 and an emitter terminal of the second transistor 12 .

The secondary side 122A side of the sensing transformer 120A according to an embodiment may be connected between the base side and the emitter side of the first and second transistors 11 and 12 . The primary side 141A of the compensation transformer 140A according to an embodiment may be connected between the collector side and the base side of the first and second transistors 11 and 12 . Here, the connection includes the case of indirect connection. The amplification unit 130A according to an embodiment may have a regression structure for injecting the output current back into the bases of the first and second transistors 11 and 12 . Due to the regression structure, the amplifier 130A can stably obtain a constant current gain for the operation of the active current compensation device 100A-1.

When the input voltage of the amplifier 130A due to the noise signal has a positive swing greater than 0, the first transistor 11 (eg, npn BJT) may operate. At this time, the operating current may flow through a first path passing through the first transistor 11 . When the input voltage of the amplifier 130A due to noise has a negative swing smaller than 0, the second transistor 12 (eg, pnp BJT) may operate. At this time, the operating current may flow through the second path passing through the second transistor 12 .

The integrated circuit unit 131A may be implemented as a one-chip IC. According to an embodiment, the first transistor 11 , the second transistor 12 , the diode 13 , R _npn , R _pnp , and R _e of the integrated circuit unit 131A may be integrated into a single chip.

The single-chip IC has a terminal b1 corresponding to the base of the first transistor 11, a terminal c1 corresponding to the collector of the first transistor 11, and a terminal corresponding to the emitter of the first transistor 11 (e1), a terminal b2 corresponding to the base of the second transistor 12, a terminal c1 corresponding to the collector of the second transistor 12, and a terminal corresponding to the emitter of the second transistor 12 (e1) may be included. However, it is not limited thereto, and a single chip of the integrated circuit unit 131A may further include other terminals in addition to the terminals b1, b2, c1, c2, e1, and e2.

In various embodiments, at least one of the terminals b1 , b2 , c1 , c2 , e1 , and e2 of the integrated circuit unit 131A may be connected to the non-integrated circuit unit. The integrated circuit unit 131A and the non-integrated circuit unit may be coupled together to function as an amplification unit 130A according to an embodiment.

According to the embodiment shown in FIG. 3 , capacitors C _b of the non-integrated circuit may be connected to the base terminal b1 of the first transistor 11 and the base terminal b2 of the second transistor 12 , respectively. Capacitors C _e of the non-integrated circuit may be respectively connected to the emitter terminal e1 of the first transistor 11 and the emitter terminal e2 of the second transistor 12 . The external power supply 400 may be connected between the collector terminal c1 of the first transistor 11 and the collector terminal c2 of the second transistor 12 . The collector terminal c2 of the second transistor 12 may correspond to the second reference potential 602 . The decoupling capacitor C _dc of the non-integrated circuit unit may be connected between the collector terminal c1 of the first transistor 11 and the collector terminal c2 of the second transistor 12 .

A combination of the integrated circuit unit 131A and the non-integrated circuit unit C _b , C _e , C _dc , Z ₁ , Z ₂ may function as an amplification unit 130A according to the embodiment shown in FIG. 3 .

According to various embodiments of the present disclosure, essential components of the active current compensating devices 100A and 100A-1 may be integrated into the one-chip integrated circuit unit 131A. Therefore, compared to the case of using a discrete semiconductor device, the size of the amplification unit 130 or 130A can be minimized by using the integrated circuit unit 131 or 131A of a single chip.

Inductors, capacitors (eg, C _b , C _e , C _dc ), Z ₁ and Z ₂ of the non-integrated circuit unit are individual components and may be implemented around the one-chip integrated circuit unit 131A. there is.

The capacitance required for the capacitors C _b , C _e , and C _dc to couple an alternating current (AC) signal may be several μF or more (eg, 10 μF). Since this capacitance value is difficult to implement within a single-chip integrated circuit part, the capacitors C _b , C _e , and C _dc may be implemented outside the integrated circuit part, that is, in the non-integrated circuit part.

Impedances Z ₁ and Z ₂ may be implemented outside of the integrated circuit part, ie, in the non-integrated circuit part, to achieve design flexibility for various power systems or various first devices 300 . Z ₁ and Z ₂ may be flexibly designed according to a required target current gain according to the winding ratio of the sensing transformer 120A and the compensating transformer 140A. By adjusting the impedances Z ₁ and Z ₂ , various current compensating devices capable of applying the same integrated circuit unit 131A to various power systems can be designed. In particular, the size and impedance characteristics of the sensing transformer 120A should vary according to the maximum rated current of the first device 300 . Therefore, proper design of Z ₁ and Z ₂ is required to make the ratio of the injection current to the sensing noise current uniform over a wide frequency range. The ratio of the injection current to the sensing noise current may be designed to be 1 in a wide frequency range by adjusting the winding ratio of the sensing transformer 120A and the compensation transformer 140A and the ratio of Z ₁ and Z ₂ . To this end, the impedances Z ₁ and Z ₂ may be implemented outside the integrated circuit unit 131A for design flexibility. In one embodiment, Z ₁ and Z ₂ may each include a series connection of a resistor and a capacitor.

Since the integrated circuit unit 131A according to various embodiments of the present invention is designed considering expandability, it can be used in various types of active current compensation devices. For example, the integrated circuit unit 131A includes the current compensating device 100A-1 shown in FIG. 3, the current compensating device 100A-2 shown in FIG. 4, and the current compensating device 100A-3 shown in FIG. , and can be used in the current compensation device 100B shown in FIG. The same type of integrated circuit unit 131A may be used in various embodiments, and the non-integrated circuit unit may be designed differently depending on the embodiment.

In various embodiments of the present invention, by using the amplification unit 130 divided into an integrated circuit unit and a non-integrated circuit unit, various types of active current compensation devices can be mass-produced through mass production of the integrated circuit unit. In addition, the size of the active current compensation device can be minimized.

As such, the active current compensation devices 100, 100A, 100A-1, 100A-2, 100A-3, and 100B according to various embodiments are characterized in that they are divided into an integrated circuit part and a non-integrated circuit part.

Meanwhile, the active current compensation device 100A-1 may further include a decoupling capacitor unit 170A on the output side (ie, the second device 200 side). One ends of each capacitor included in the decoupling capacitor unit 170A may be connected to the first high current path 111 and the second high current path 112, respectively. The opposite end of each capacitor may be connected to the first reference potential 601 of the current compensating device 100A-1.

The decoupling capacitor unit 170A may prevent the output performance of the compensating current of the active current compensation device 100A-1 from greatly varying according to the change in the impedance value of the second device 200. The impedance (Z _Y ) of the decoupling capacitor unit 170A may be designed to have a value smaller than a specified value in the first frequency band to be reduced. Due to the coupling of the decoupling capacitor unit 170A, the current compensation device 100A-1 can be used as an independent module in any system.

According to an embodiment, the decoupling capacitor unit 170A may be omitted in the active current compensator 100A-1.

4 schematically shows the configuration of an active current compensation device 100A-2 according to another embodiment of the present invention. Hereinafter, descriptions of overlapping contents with those described with reference to FIGS. 2 and 3 will be omitted.

Referring to FIG. 4, the active current compensation device 100A-2 generates first currents I11, I12, and I13 input in a common mode to the high current paths 111, 112, and 113 connected to the first device 300, respectively. can actively compensate for

To this end, the active current compensation device 100A-2 includes three high current paths 111, 112, and 113, a sensing transformer 120A-2, an amplification unit 130A, a compensation transformer 140A, and a compensation capacitor unit 150A-2. 2) may be included.

Compared to the active current compensation devices 100A and 100A-1 according to the above-described embodiment, the active current compensation device 100A-1 according to the embodiment shown in FIG. 4 has three large current paths 111, 112, 113), and thus there is a difference between the sensing transformer 120A-2 and the compensation capacitor unit 150A-2. Therefore, the active current compensation device 100A-2 will be described below based on the above-mentioned differences.

The active current compensation device 100A-2 may include a first high current path 111, a second high current path 112, and a third high current path 113 that are distinguished from each other. According to an embodiment, the first high current path 111 may be an R phase, the second high current path 112 may be an S phase, and the third high current path 113 may be a T phase power line. The first currents I11 , I12 , and I13 may be input to each of the first high current path 111 , the second high current path 112 , and the third high current path 113 in a common mode.

The primary side 121A-2 of the sensing transformer 120A-2 is disposed in the first, second, and third high current paths 111, 112, and 113, respectively, and the induced current in the secondary side 122A-2 can create Magnetic flux densities generated in the sensing transformer 120A-2 by the first currents I11, I12, and I13 on the three high current paths 111, 112, and 113 may reinforce each other.

In the active current compensation device 100A-2 according to the embodiment shown in FIG. 4, the amplification unit 130A may correspond to the above-described amplification unit 130A.

The compensation capacitor unit 150A-2 forms a path through which the compensation currents IC1, IC2, and IC3 generated by the compensation transformer 140A flow to the first, second, and third high current paths 111, 112, and 113, respectively. can provide

The active current compensation device 100A-2 may further include a decoupling capacitor unit 170A-2 on the output side (ie, the second device 200 side). One end of each capacitor included in the decoupling capacitor unit 170A-2 may be connected to the first high current path 111, the second high current path 112, and the third high current path 113, respectively. The opposite end of each capacitor may be connected to the first reference potential 601 of the current compensation device 100A-2.

The decoupling capacitor unit 170A-2 may prevent the output performance of the compensating current of the active current compensation device 100A-2 from greatly varying according to the change in the impedance value of the second device 200. The impedance (Z _Y ) of the decoupling capacitor unit 170A-2 may be designed to have a value smaller than a specified value in the first frequency band to be subjected to noise reduction. Due to the coupling of the decoupling capacitor unit 170A-2, the current compensation device 100A-2 can be used as an independent module in any system (eg, a three-phase, three-wire system).

According to one embodiment, in the active current compensator 100A-2, the decoupling capacitor unit 170A-2 may be omitted.

The active current compensator 100A-2 according to this embodiment may be used to compensate (or cancel) the first currents I11, I12, and I13 moving from the load to the power supply in the three-phase, three-wire power system. .

According to the technical idea of the present invention, the active current compensation device according to various embodiments can be modified to be applied to a three-phase four-wire system as well.

The amplifier 130A according to an embodiment of the present invention may be applied to a single-phase (two-wire) system shown in FIG. 2, a three-phase three-wire system shown in FIG. 3, and a three-phase four-wire system not shown. there is. Since the integrated circuit unit 131A of a single chip can be applied to various systems, the integrated circuit unit 131A can have versatility in active current compensation devices according to various embodiments.

As described above with reference to FIG. 3 , the integrated circuit unit 131A may include the first transistor 11 , the second transistor 12 , and/or one or more resistors. In addition, the integrated circuit unit 131A may further include a diode 13 according to embodiments. In an alternative embodiment, diode 13 may be replaced with a resistor.

In the IC chip in which the integrated circuit unit 131A is incorporated, the base terminal b1 of the first transistor 11, the collector terminal c1 of the first transistor 11, and the emitter terminal e1 of the first transistor 11 ), a base terminal b2 of the second transistor 12 , a collector terminal c1 of the second transistor 12 , and an emitter terminal e1 of the second transistor 12 . However, it is not limited thereto, and a single chip of the integrated circuit unit 131A may further include other terminals in addition to the terminals b1, b2, c1, c2, e1, and e2.

The integrated circuit unit 131A is combined with a non-integrated circuit unit including discrete components such as inductors, capacitors (eg, C _b , C _e , C _dc ), Z ₁ and Z ₂ , in various embodiments. A current compensating device may be configured according to the present invention. For example, individual components of the non-integrated circuit unit may be general commercial devices. However, it is not limited thereto.

Discrete components such as inductors, capacitors (eg, C _b , C _e , C _dc ), Z ₁ and Z ₂ are implemented around the IC chip in which the integrated circuit unit 131A is embedded.

The capacitance required for the capacitors C _b , C _e , and C _dc to couple low-frequency AC signals may be several μF or more. Since this capacitance value is difficult to implement within an IC chip in which the integrated circuit unit 131A is embedded, the capacitors C _b , C _e , and C _dc may be implemented outside the integrated circuit unit, that is, in the non-integrated circuit unit.

Impedances Z ₁ and Z ₂ may be implemented outside of the integrated circuit part, ie, in the non-integrated circuit part, to achieve design flexibility for the various first devices 300 . By adjusting the impedances Z ₁ and Z ₂ , various current compensating devices capable of applying the same integrated circuit unit 131A to various power systems can be designed. In particular, the size and impedance characteristics of the sensing transformer 120A should vary according to the maximum rated current of the first device 300 . Therefore, proper design of Z ₁ and Z ₂ is required to make the ratio of the injection current to the sensing noise current uniform over a wide frequency range. Accordingly, Z ₁ and Z ₂ may be implemented outside the integrated circuit unit 131A, that is, in the non-integrated circuit unit for design flexibility. In one embodiment, Z ₁ may be a series connection of a resistor R ₁ and a capacitor C ₁ , and Z ₂ may be a series connection of a resistor R ₂ and a capacitor C ₂ . Since C ₁ and C ₂ are additionally implemented in series next to R ₁ and R ₂ , respectively, the ratio of the injection current to the sensing noise current may have better performance in a low frequency range.

5 schematically shows the configuration of an active current compensation device 100A-3 according to another embodiment of the present invention. Hereinafter, descriptions of overlapping contents with those described with reference to FIGS. 2 and 3 will be omitted.

Referring to FIG. 5 , the active current compensation device 100A-3 actively compensates for the first currents I11 and I12 input in the common mode to the high current paths 111 and 112 connected to the first device 300. can do.

To this end, the active current compensation device 100A-3 includes two high current paths 111 and 112, a sensing transformer 120A, an amplification unit 130A-3, a compensation transformer 140A, and a compensation capacitor unit 150A. can do.

The active current compensator 100A-3 may be an example of the active current compensator 100A shown in FIG. 2 . The amplifier 130A-3 may be an example of the amplifier 130 shown in FIG. 2 .

The amplification unit 130A-3 of the active current compensation device 100A-3 according to an embodiment may include an integrated circuit unit 131A and a non-integrated circuit unit. Components other than the integrated circuit unit 131A in the amplification unit 130A-3 may be included in the non-integrated circuit unit.

The integrated circuit unit 131A may correspond to the aforementioned integrated circuit unit 131A. That is, the aforementioned integrated circuit unit 131A may also be applied to the active current compensation device 100A-3 according to the embodiment shown in FIG. 5 . Therefore, since the description of the integrated circuit unit 131A is redundant, it is only simplified.

As described above, the integrated circuit unit 131A may include the first transistor 11, the second transistor 12, and/or one or more resistors. In one embodiment, the first transistor 11 may be a npn BJT, and the second transistor 12 may be a pnp BJT. For example, the amplifier 130A-3 may have a push-pull amplifier structure including an npn BJT and a pnp BJT. The integrated circuit unit 131A may further include a diode 13 in addition to the first transistor 11 , the second transistor 12 , and one or more resistors. For example, one end of the diode 13 may be connected to the base end of the first transistor 11 and the other end of the diode 13 may be connected to the base end of the second transistor 12 . In an alternative embodiment, diode 13 may be replaced with a resistor.

The induced current induced in the secondary side 122A by the sensing transformer 120A may be differentially input to the amplifier 130A-3. At the input terminal of the amplifier 130A-3, a resistor R _in may be connected in parallel to the secondary side 122A. The resistor R _in can adjust the input impedance of the amplifier 130A-3. Capacitors C _b and C _e can selectively couple AC signals only.

The power supply 400 supplies DC low voltage (V _dc ) based on the second reference potential 602 to drive the amplifier 130A-3. C _dc is a decoupling capacitor for DC and may be connected in parallel to the power supply 400 . C _dc may selectively couple an AC signal between both collectors of the first transistor 11 (eg, npn BJT) and the second transistor 12 (eg, pnp BJT).

The aforementioned resistance R _in , capacitors C _b , C _e , and C _dc may be included in the non-integrated circuit unit.

Meanwhile, in the sensing transformer 120A, when the winding ratio of the primary side 121A and the secondary side 122A is 1:N _sen , the current induced in the secondary side 122A is the first currents I11 and I12 ), and in the _compensation transformer 140A, if the winding ratio between the primary side 141A and the secondary side 142A is 1:N _inj , the current induced in the secondary side 142A is, It is 1/N _inj times the current flowing through the primary side 141A (ie, the amplified current). Therefore, to generate compensation currents IC1 and IC2 having the same magnitude as the first currents I11 and I12 and opposite phases to cancel the first currents I11 and I12, the amplification unit 130A-3 The current gain can be designed to be N _sen N _inj .

Meanwhile, the current flowing through the collector-emitter varies according to the voltage applied between the base and the emitter of the BJT. When the input voltage of the amplifier 130A-3 due to noise has a positive swing greater than 0, the first transistor 11 (eg, npn BJT) may operate. When the input voltage of the amplifier 130A-3 due to noise has a negative swing smaller than 0, the second transistor 12 (eg, pnp BJT) may operate.

The active current compensation device 100A-3 according to such an embodiment may be used to compensate (or cancel) the first currents I11 and I12 moving from the load to the power supply in a single-phase (two-wire) power system. . However, it is not limited thereto.

6 schematically shows the configuration of an active current compensation device 100B according to another embodiment of the present invention.

Referring to FIG. 6 , the active current compensation device 100B is a first current (I11, I12, I13, I13, I13, I14) can be actively compensated.

An active current compensation device 100B according to an embodiment includes four high current paths 111, 112, 113, and 114, a noise coupling capacitor unit 181, a sensing transformer 120B, an amplification unit 130B, and a compensation unit ( 160B), a compensation distribution capacitor unit 182, and a decoupling capacitor 170B.

Unlike the current compensating devices 100A, 100A-1, 100A-2, and 100A-3 according to the above-described embodiments, the active current compensating device 100B may be non-isolated from the high current paths 111, 112, 113, and 114. can However, the same integrated circuit unit 131A as in the above-described embodiments may also be used in the active current compensation device 100B.

An active current compensation device 100B according to an embodiment may include a first high current path 111, a second high current path 112, a third high current path 113, and a fourth high current path 114 that are distinguished from each other. can According to an embodiment, the first high current path 111 is the R phase, the second high current path 112 is the S phase, the third high current path 113 is the T phase, and the fourth high current path 114 is the N phase power line. can be The first currents I11, I12, I13, and I14 are in common mode for each of the first high current path 111, the second high current path 112, the third high current path 113, and the fourth high current path 114. can be entered.

In one embodiment, the active current compensation device 100B may include a noise coupling 0 capacitor unit 181 on the input side (ie, the first device 300 side). The noise coupling capacitor unit 181 may be composed of X-capacitors (X-caps) for coupling noise between phases.

The primary side 121B of the sensing transformer 120B is disposed in each of the first large current path 111, the second large current path 112, the third large current path 113, and the fourth large current path 114, An induced current may be generated in the secondary side 122B. Magnetic flux densities generated in the sensing transformer 120B by the first currents I11, I12, I13, and I14 on the four high current paths 111, 112, 113, and 114 may reinforce each other.

The amplification unit 130B may be divided into an integrated circuit unit 131A and a non-integrated circuit unit. Components other than the integrated circuit unit 131A in the amplification unit 130B may be included in the non-integrated circuit unit. For example, components included in the non-integrated circuit unit may be discrete commercial devices, but are not limited thereto.

The integrated circuit unit 131A may correspond to the aforementioned integrated circuit unit 131A. That is, the aforementioned integrated circuit unit 131A may also be applied to the active current compensation device 100B according to the embodiment shown in FIG. 6 . Therefore, since the description of the integrated circuit unit 131A is redundant, it will be omitted.

In the amplification unit 130B, the non-integrated circuit unit may be implemented differently from the above-described embodiments. In this embodiment, the non-integrated circuit unit may include impedances Z ₀ , Z _d , capacitors C _b , C _e , and C _dc .

Impedances Z ₀ and Z _d may be connected to base sides of the first and second transistors 11 and 12 . The connection here includes an indirect connection. Impedance Z _d may be provided for high frequency stabilization. For example, Z _d can be a resistor or a ferrite bead. However, it is not limited thereto. Impedance Z ₀ may be provided for low frequency stability. Also, Z ₀ may block a DC signal. For example, Z ₀ may be a series connection of a resistor and a capacitor. However, it is not limited thereto.

Meanwhile, the amplification unit of the current compensation device 100B is not limited to the amplification unit 130B. The amplification unit of the current compensation device 100B may be implemented as one of the amplification units including the aforementioned amplification unit 130A, the amplification unit 130A-1, the amplification unit 130A-2, and the amplification unit 130A-3. may be However, it is not limited thereto.

The compensation unit 160B may inject the compensation current into one high current path (eg, the fourth high current path 114). A compensation distribution capacitor unit 182 may be provided on the output side (ie, the second device 200 side) of the active current compensation device 100B. The compensation distribution capacitor unit 182 may be composed of X-capacitors.

The active current compensation device 100B may include a decoupling capacitor 170B on the output side (ie, the second device 200 side). The decoupling capacitor 170B may be a Y-capacitor for decoupling the AC power terminal impedance.

The active current compensator 100B according to such an embodiment may be used to compensate (or cancel) the first currents I11, I12, I13, and I14 moving from the load to the power supply in the three-phase, four-wire power system. .

Compared to passive EMI filters, the active current compensation devices 100, 100A, 100A-1, 100A-2, 100A-3, and 100B according to various embodiments show a slight increase in size and heat generation in high-power systems.

An active current compensation device according to various embodiments includes single-chip integrated circuit units 131 and 131A, thereby minimizing a size compared to a case of including a discrete semiconductor device. The integrated circuit unit 131A is universally and universally ( universally) can be applied.

The integrated circuit unit 131A and the active current compensation device including the integrated circuit unit 131A according to various embodiments may be used in various power electronic products regardless of power rating. The integrated circuit unit 131A and the active current compensation device including the integrated circuit unit 131A according to various embodiments can be extended to a high-power and high-noise system.

Due to the one-chip integrated circuit unit 131A, the function of the active current compensation device can be extended without additional components.

The integrated circuit unit 131A according to various embodiments may be sufficiently robust against transient voltage in a high current path in which an active current compensation device is installed.

Specific implementations described in the present invention are examples and do not limit the scope of the present invention in any way. For brevity of the specification, description of conventional electronic components, control systems, software, and other functional aspects of the systems may be omitted. In addition, the connection of lines or connecting members between the components shown in the drawings are examples of functional connections and / or physical or circuit connections, which can be replaced in actual devices or additional various functional connections, physical connection, or circuit connections.

The spirit of the present invention should not be limited to the above-described embodiments and should not be determined, and all ranges equivalent to or equivalently changed from the claims as well as the claims described below fall within the scope of the spirit of the present invention. will do it

Claims (6)

In the active current compensation device for actively compensating for noise generated in a common mode in each of at least two high current paths,
at least two or more high-current paths for transferring power supplied by the second device to the first device;
a sensing unit generating an output signal corresponding to the common mode noise current on the high current path;
an amplification unit generating an amplification current by amplifying the output signal; and
A compensating unit generating a compensating current based on the amplified current and allowing the compensating current to flow through each of the at least two large current paths;
The amplification unit includes a non-integrated circuit unit and a one-chip integrated circuit unit,
The non-integrated circuit unit is designed according to a power system of at least one of the first device and the second device,
The single-chip integrated circuit unit is independent of the rated power specifications of the first device and the second device,
The sensing unit includes a sensing transformer,
The compensation unit includes a compensation transformer,
The one-chip integrated circuit unit includes a first transistor and a second transistor,
The non-integrated circuit unit includes a first impedance _Z 1 connecting the emitter node side of the first transistor and the second transistor and the input terminal of the compensation unit, and the base node side of the first transistor and the second transistor. And a second impedance (Z ₂ ) connecting the input terminal of the compensator,
The value of the first impedance or the value of the second impedance is determined based on a winding ratio of the sensing transformer and the compensation transformer and a target current gain of the amplifier.
Active Current Compensation Device. According to claim 1,
The non-integrated circuit unit is designed according to the rated power of the first device,
Active Current Compensation Device. According to claim 1
The one-chip integrated circuit part further comprises one or more resistors,
Active Current Compensation Device. delete According to claim 1,
The configuration of the single-chip integrated circuit unit is independent of the turns ratio and the target current gain,
Active Current Compensation Device. According to claim 1,
Depending on the design of the first impedance and the second impedance, the single chip integrated circuit section is used for first devices of various power systems.
Active Current Compensation Device.

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