CN111176152A - Optical coupling switching input signal source circuit - Google Patents
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- CN111176152A CN111176152A CN201911223147.6A CN201911223147A CN111176152A CN 111176152 A CN111176152 A CN 111176152A CN 201911223147 A CN201911223147 A CN 201911223147A CN 111176152 A CN111176152 A CN 111176152A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21119—Circuit for signal adaption, voltage level shift, filter noise
Abstract
The invention discloses a kind of optical coupling switching input signal source circuit, which includes: a signal source module: the device comprises a current output unit and a voltage output unit; an input module: the signal source module is connected with the transmission current output unit and is used for transmitting a current signal output by the current output unit or a voltage signal output by the voltage output unit; a switch module: the input circuit comprises a photoelectric coupling element, a switching module, a signal source module and a control module, wherein the primary side of the photoelectric coupling element is positioned on one side of the switching module, and the secondary side of the photoelectric coupling element is positioned on one side of the input module so as to select an output unit of the signal source module through on and off between the primary side and the secondary side of the photoelectric coupling element; an amplification module: and the input module is connected with the signal source module to amplify and output the voltage processed by the signal source module through the input module. The current output or the voltage output in the signal source module is selected and controlled by the optical coupling element, so that the selection signal is controlled to be input into the conditioning circuit by the circuit, the current or voltage input is not required to be selected manually, the control mode is simple, and the labor cost is saved.
Description
Technical Field
The invention relates to the technical field of industrial control, in particular to an optical coupling switching input signal source circuit.
Background
In the field of industrial control, analog signals are widely used, and the types of analog signals commonly used include 0-10V and 0-20 mA. And the frequency converter needs to acquire an analog signal of an external sensor as a control reference. Due to the difference of signal types, the front end of the signal needs to have a selection switch to ensure the correct signal access to the corresponding circuit.
At present, in an analog quantity interface circuit of a frequency converter, an analog quantity input signal source distributes signals to a corresponding conditioning circuit through a selection switch selection channel, and in a conventional scheme, a selection switch mechanism is a dial switch, which means that analog quantity signal selection is completed by a human hand, manual control is adopted, intelligence is low, and labor cost is increased.
Disclosure of Invention
The present invention is directed to solve at least one of the above-mentioned drawbacks, and discloses an input signal source circuit for optical coupling switching.
The invention provides a kind of optical coupling switches over the input signal source circuit, including:
a signal source module: the device comprises a current output unit and a voltage output unit;
an input module: the signal source module is connected with the current output unit and is used for connecting and transmitting the current signal output by the current output unit or the voltage signal output by the voltage output unit;
a switch module: the system comprises a photoelectric coupling element, a switching module and a signal source module, wherein the primary side of the photoelectric coupling element is positioned on one side of the switching module, and the secondary side of the photoelectric coupling element is positioned on one side of the input module so as to select an output unit of the signal source module through on and off between the primary side and the secondary side of the photoelectric coupling element;
an amplification module: and the input module is connected with the voltage source module to amplify and output the voltage processed by the signal source module through the input module.
Optionally, the switch module further includes a first resistor, a diode, a first capacitor, and a second resistor, a first end of the first resistor is connected to the control signal input terminal, a second end of the first resistor is connected to an anode of the diode, a cathode of the diode is respectively connected to a first end of a primary side of the optical coupling element and a first end of the first capacitor, and a first end of the second resistor, and a second end of the primary side of the optical coupling element, a second end of the first capacitor, and a second end of the second resistor are respectively grounded.
Optionally, the input module includes a third resistor, a fourth resistor and a fifth resistor, wherein the first end of the third resistor is connected to the signal input source module, the second end of the third resistor is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the first end of the fifth resistor and the third end of the secondary side of the optical coupling element, the fourth end of the secondary side of the optical coupling element is connected to the signal source module, and the second end of the fifth resistor is connected to the reference ground.
Optionally, the amplifying module includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and an operational amplifier, wherein a first end of the sixth resistor is connected to a first end of the fourth resistor and a second end of the third resistor, a second end of the sixth resistor is connected to a first end of the ninth resistor and a positive input end of the operational amplifier, a second end of the ninth resistor is connected to the eighth resistor, a second end of the eighth resistor is grounded, a first end of the seventh resistor is connected to a ground reference, a second end of the seventh resistor is connected to a negative input end of the operational amplifier and a first end of the eleventh resistor, a second end of the eleventh resistor is connected to a first end of the tenth resistor, a second end of the tenth resistor is connected to an output end of the amplifier, and a positive voltage end of the amplifier is connected to a positive voltage, the negative voltage end of the amplifier is grounded.
Optionally, the switch module further includes a phase inverter, a first end of the phase inverter is connected to the control signal input end, and a second end of the phase inverter is connected to the first end of the first resistor.
Optionally, the second end of the fifth resistor is directly grounded, and the first end of the seventh resistor is also directly grounded.
Optionally, the current value input by the current output unit is 0mA to 20mA, and the voltage value input by the voltage output unit is 0V to 10V.
Optionally, the control signal input end includes a high level and a level, the current output unit outputs a current signal when the control signal input end inputs the high level, and the voltage output unit outputs a voltage signal when the control signal input end inputs the low level.
Optionally, the control signal input end includes a high level and a level, the voltage output unit outputs a voltage signal when the control signal input end inputs the high level, and the current output unit outputs a current signal when the control signal input end inputs the low level.
The invention has the beneficial effects that: the invention selects and controls the current output or the voltage output in the signal source module through the optical coupling element, thereby realizing that the selection signal is simply controlled by the circuit to be input into the conditioning circuit without the complicated step of disassembling the cover plate of the frequency converter when the current or the voltage is manually selected to be output.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a general flow chart of a circuit of an opto-coupler switching input signal source according to the present application;
fig. 2 is a schematic diagram of a circuit of an optically coupled switching input signal source according to a first embodiment of the present application;
FIG. 3 is a graph of the primary current waveform of the optocoupler transmission ratio of the present application;
fig. 4 is a schematic diagram of an optically coupled switching input signal source circuit according to a second embodiment of the present application;
fig. 5 is a schematic diagram of an optical coupler switching input signal source circuit according to a third embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The invention discloses an optical coupling switching input signal source circuit, please refer to fig. 1, which comprises
The signal source module 100: comprises a current output unit 110 and a voltage output unit 120;
the input module 200: the signal source module 100 is connected to transmit the current signal output by the current output unit 110 or the voltage signal output by the voltage output unit 120;
the switch module 300: the signal source module comprises a photoelectric coupling element ISO1, wherein the primary side of the photoelectric coupling element ISO1 is positioned on one side of a switch module 300, and the secondary side is positioned on one side of an input module 200, so that the output unit of the signal source module 100 is selected through the on and off between the primary side and the secondary side of the photoelectric coupling element ISO 1;
the amplification module 400: and is connected to the input module 200 to amplify and output the voltage processed by the signal source module 100 through the input module 200.
This application selects and control the current output or the voltage output in the signal source module through opto-coupler element ISO1 to realize simply by circuit self control selection signal input conditioning circuit, need not the complicated step of taking apart the converter apron when artifical selection electric current or voltage output, especially be fit for using on the converter of high protection demand, control mode is simple, practices thrift the human cost.
In an embodiment, referring to fig. 2, the switch module 300 further includes a first resistor R1, a diode D1, a first capacitor C1, and a second resistor R2, wherein a first end of the first resistor R1 is connected to the control signal input terminal CTRL, a second end of the first resistor R1 is connected to an anode of the diode D1, a cathode of the diode D1 is connected to the first end 1 of the primary side of the optical coupling element ISO1 and the first end of the first capacitor C1, respectively, and a first end of the second resistor R2, and the second end 2 of the primary side of the optical coupling element ISO, the second end of the first capacitor C1, and the second end of the second resistor R2 are grounded, respectively. The first capacitor C1 and the second resistor R2 are connected in parallel at two ends of the primary side of the optical coupling element ISO1, the primary side of the optical coupling element ISO1 is a light emitting diode and is connected in parallel with the second resistor R2, so that after the light emitting diode in the optical coupling element ISO1 is turned off, the electric energy stored in a junction capacitor in the light emitting diode is accelerated to discharge, the trailing phenomenon of a pulse signal is improved, the actual working frequency of the circuit is improved, the first capacitor C1 is connected in parallel, the first capacitor C1 and the second resistor R2 form an RC absorption loop together, peak impact and burr are absorbed, and filtering and anti-interference are carried out. The diode D1 is connected in the forward direction to help ensure that the optocoupler ISO1 is in the absolute off state when the control signal output CTRL is at a low level, and the value of the first resistor R1 is selected by the forward-conducting voltage drops of the optocoupler ISO1 and D1.
In an embodiment, the input module 200 includes a third resistor R3, a fourth resistor R4, and a fifth resistor R5, wherein a first end of the third resistor R3 is connected to the signal input source module 100, a second end of the third resistor R3 is connected to a first end of the fourth resistor R4, a second end of the fourth resistor R4 is connected to a first end of the fifth resistor R5 and a third end 3 of a secondary side of the optical coupling element ISO1, a fourth end 4 of the secondary side of the optical coupling element ISO1 is connected to the signal source module 100, and a second end of the fifth resistor R5 is connected to the reference ground terminal GISO. In this embodiment, the secondary side of the optical coupling element ISO1 is equivalent to a photosensitive triode element, when a sufficiently high voltage is applied to the primary side of the optical coupling element ISO1, the light emitting diode can be made to emit light, and the photosensitive triode is turned on after receiving sufficient light, for example, when the input end CTRL of the control signal outputs a high level of +5V, the diode on the primary side of the optical coupling element ISO1 emits light, and at this time, the secondary side of the optical coupling element ISO1 senses light and turns on the light signal to convert the light signal into a current signal, therefore, when the optical coupling element ISO1 is turned on, the input module 200 connected to the secondary side of the optical coupling element ISO 68 flows through a current signal, so that the current output unit 110 in the signal source module 100 is controlled to operate, because the secondary side of the optical coupling element ISO1 is in parallel connection with the third resistor R3 and the fourth resistor R4, when the secondary side of the optical coupling element ISO1 is turned on, the end of the third, the fourth resistor R4 and the sixth resistor R6 together become a differential input resistor of the amplifier U1A, and the fifth resistor R5 divides the voltage to protect the opto-coupler element ISO 1.
It should be noted that, when the optical coupler element ISO1 is turned on, the secondary side of the optical coupler element ISO1 needs a minimum current value to be turned on, taking the optical coupler element with the model LTV-815S as an example, the secondary side of the optical coupler element needs at least 20mA current to flow, and the optical coupler element has an optical coupler transmission ratio, please refer to fig. 3, that is, CTR is IC/IF 100%, where CTR is the optical coupler transmission ratio, IC represents the dc output current of the secondary side of the optical coupler element, IF represents the dc input current of the primary side of the optical coupler element, and therefore, the dc output current IC flowing through the secondary side of the optical coupler element ISO1 should satisfy: IC ═ IF ═ CTR ≧ 20 mA; in the optical coupler element ISO1, a suitable range of primary side current IF of 5mA or more is selected to be considered to work in the optical coupler. Based on the characteristic of the optical coupler element ISO1, the value of the first resistor R1 may be selected according to the forward conduction voltage drop of the optical coupler element ISO1 and the diode D1, and in this embodiment, the diode D1 is used to ensure that the optical coupler ISO1 is in an absolute off state when the control signal input end CTRL is at a low level. Based on this, when the input of the control signal input terminal CTRL is at a low level, the optical coupling element ISO1 is not turned on, and at this time, the secondary side of the optical coupling element ISO1 is not connected to the input module 200, so that the signal source module 100 is directly connected to the third resistor R3 and is turned on, the third resistor R3, the fourth resistor R4, and the fifth resistor R5 are connected in series and are connected to the amplifying module 400, and at this time, the voltage input unit 120 of the signal source module 100 operates.
In one embodiment, the amplifying module 400 includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and an operational amplifier U1A, wherein a first end of the sixth resistor R6 is connected to a first end of the fourth resistor R4 and a second end of the third resistor R3, a second end of the sixth resistor R6 is connected to a first end of the ninth resistor R9 and a positive input end of the operational amplifier U1A, a second end of the ninth resistor R9 is connected to the eighth resistor R8, a second end of the eighth resistor R8 is grounded, a first end of the seventh resistor R7 is connected to the reference ground terminal GISO, a second end of the seventh resistor R7 is connected to a negative input end of the operational amplifier U1A and a first end of the eleventh resistor R11, a second end of the eleventh resistor R11 is connected to a first end of the tenth resistor R10, a second end of the tenth resistor R1A is connected to the positive output end of the operational amplifier U1 10, and a positive voltage output end of the operational amplifier U1 10, the negative voltage terminal of the amplifier is connected to ground. It should be noted that the ninth resistor R9 and the eleventh resistor R11 may be omitted, and the resistances of the eighth resistor R8 and the tenth resistor R10 may be increased. The output end of the operational amplifier U1A is the output end of the whole conditioning circuit, and the output end can be further connected to an a/D conversion module of a single chip microcomputer or other main controller for further processing of signals.
In a specific embodiment, the current output unit 110 inputs an analog current having a current value of 0mA-20mA, and the voltage output unit 120 inputs an analog voltage having a voltage value of 0V-10V. The model of the first resistor R1 is 390/1%, the model of the diode D1 is BAV99LT1G, the capacitance value of the first capacitor C1 is 0.1u, the resistance value of the second resistor R2 is 560, and the model of the optical coupling element ISO1 is LTV-815S. The model of the third resistor R3 is 7.6K/1%, the model of the fourth resistor R4 is 2.28K/1%, the model of the fifth resistor R5 is 120/0.5%, the model of the sixth resistor R6 is 1M/1%, the model of the seventh resistor R7 is 1M/1%, the model of the operational amplifier U1A is SGM8270, wherein the positive voltage of the operational amplifier U1A is +5V, the model of the ninth resistor R9 is 100K/1%, the model of the eighth resistor R8 is 1M/1%, the model of the tenth resistor R10 is 1M/1%, and the model of the eleventh resistor R11 is 100K/1%. In this embodiment, when a high voltage, for example, a +5V level, is input to the control signal input terminal CTRL, the optical coupler element ISO1 is turned on, and at this time, the turned-on elements of the input module 200 and the amplifying module 400 are the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11, and the operational amplifier U1A, and at this time, the current input unit 110 in the signal source module 100 outputs a current of 0 to 20mA, and the current is converted into a voltage signal of 0 to 2.637V through the above circuit, and is provided to the control module connected to the operational amplifier U1A, where the dc output current IC flowing through the secondary side of the optical coupler element ISO1 should satisfy: IC ═ IF ≧ CTR ≧ 20 mA. When the control signal input terminal CTRL inputs a low level, for example, when 0V is input, the optical coupling element ISO1 is turned off, at this time, the elements that the input module 200 and the amplification module 400 are turned on are the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11, and the operational amplifier U1A, the third terminal 3 and the fourth terminal 4 of the secondary side of the optical coupling element ISO1 are in an open circuit state, at this time, the voltage output unit 120 in the signal source module 100 operates to output a voltage signal of 0 to 10V, AI is Vin, AIN is Vout, Rx is R6 is R7, Ry is R8+ R9 is R10+ R11, and the calculation formula is:
Vout＝(R4+R5)/(R3+R4+R5)*(Ry/Rx)
the value range of the output Vout which can be obtained by calculation in the range of 0-10V of the signal source is 0-2.64V.
In another embodiment, an inverter U2A may be further connected to the first resistor R1 of the switch module 300 and the control signal input end CTRL, and the inverter may invert the phase of the input signal by 180 degrees, so that, in contrast to the previous embodiment, when the control signal input end CTRL inputs a high level, the optical coupling element ISO1 is turned off, the signal source module 100 selects the voltage output unit 120 to operate, and when the control signal input end CTRL inputs a low level, the optical coupling element ISO1 is turned on, and the signal source module 100 selects the current output unit 110.
In an embodiment, the second end of the fifth resistor R5 is directly grounded, and the first end of the seventh resistor R7 is also directly grounded, instead of being connected to the analog ground GISO, when two elements are directly grounded, the application scenario of non-isolated analog input is adopted, that is, an isolated power supply does not need to be adopted in the signal source module 100, so that the circuit is simplified, the number of circuit components is reduced, and the cost is saved.
It should be understood that, although the steps in the flowchart of fig. 1 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in fig. 1 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, in different orders, and may be performed alternately or at least partially with respect to other steps or other steps.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. An optically coupled switching input signal source circuit, comprising:
a signal source module: the device comprises a current output unit and a voltage output unit;
an input module: the signal source module is connected with the current output unit and is used for connecting and transmitting the current signal output by the current output unit or the voltage signal output by the voltage output unit;
a switch module: the system comprises a photoelectric coupling element, a switching module and a signal source module, wherein the primary side of the photoelectric coupling element is positioned on one side of the switching module, and the secondary side of the photoelectric coupling element is positioned on one side of the input module so as to select an output unit of the signal source module through on and off between the primary side and the secondary side of the photoelectric coupling element;
an amplification module: and the input module is connected with the voltage source module to amplify and output the voltage processed by the signal source module through the input module.
2. The circuit of claim 1, wherein the switch module further comprises a first resistor, a diode, a first capacitor, and a second resistor, a first end of the first resistor is connected to the control signal input terminal, a second end of the first resistor is connected to an anode of the diode, a cathode of the diode is connected to the first end of the primary side of the opto-coupling element and the first end of the first capacitor, respectively, and a first end of the second resistor, and a second end of the primary side of the opto-coupling element, the second end of the first capacitor, and the second end of the second resistor are grounded, respectively.
3. The circuit of claim 1, wherein the input module comprises a third resistor, a fourth resistor, and a fifth resistor, wherein a first end of the third resistor is connected to the signal input source module, a second end of the third resistor is connected to a first end of the fourth resistor, a second end of the fourth resistor is connected to a first end of the fifth resistor and a third end of the secondary side of the opto-coupled device, a fourth end of the secondary side of the opto-coupled device is connected to the signal source module, and a second end of the fifth resistor is connected to the ground reference.
4. The circuit of claim 1, wherein the amplifying module comprises a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and an operational amplifier, wherein a first end of the sixth resistor is connected to a first end of the fourth resistor and a second end of the third resistor, a second end of the sixth resistor is connected to a first end of the ninth resistor and a positive input of the operational amplifier, a second end of the ninth resistor is connected to the eighth resistor, a second end of the eighth resistor is grounded, a first end of the seventh resistor is connected to a reference ground, a second end of the seventh resistor is connected to a negative input of the operational amplifier and a first end of the eleventh resistor, and a second end of the eleventh resistor is connected to a first end of the tenth resistor, the second end of the tenth resistor is connected with the output end of the amplifier, the positive voltage end of the amplifier is connected with the positive voltage, and the negative voltage end of the amplifier is grounded.
5. The circuit of claim 2, wherein the switch module further comprises an inverter, a first terminal of the inverter is connected to the control signal input terminal, and a second terminal of the inverter is connected to the first terminal of the first resistor.
6. The circuit according to claim 4, wherein the second terminal of the fifth resistor is directly connected to ground, and the first terminal of the seventh resistor is also directly connected to ground.
7. The circuit of claim 1, wherein the current output unit input current value is 0mA-20mA, and the voltage output unit input voltage value is 0V-10V.
8. The optocoupler switching input signal source circuit according to claim 2, wherein the control signal input terminal comprises a high level and a level, the current output unit outputs the current signal when the control signal input terminal inputs the high level, and the voltage output unit outputs the voltage signal when the control signal input terminal inputs the low level.
9. The optocoupler switching input signal source circuit according to claim 5, wherein the control signal input terminal comprises a high level and a level, the voltage output unit outputs the voltage signal when the control signal input terminal inputs the high level, and the current output unit outputs the current signal when the control signal input terminal inputs the low level.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023071532A1 (en) * | 2021-11-01 | 2023-05-04 | 上海美控智慧建筑有限公司 | Input-output control circuit, controller, and air conditioner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6396137B1 (en) * | 2000-03-15 | 2002-05-28 | Kevin Mark Klughart | Integrated voltage/current/power regulator/switch system and method |
| CN101188413A (en) * | 2007-11-30 | 2008-05-28 | 艾默生网络能源有限公司 | An input simulation detection circuit for frequency converter |
| CN102497197A (en) * | 2011-12-28 | 2012-06-13 | 中冶南方（武汉）自动化有限公司 | Isolated bidirectional digital input output circuit |
| CN105242595A (en) * | 2015-09-28 | 2016-01-13 | 深圳市易驱电气有限公司 | Switching apparatus and switching method of analog input signals |
| CN207304403U (en) * | 2017-10-25 | 2018-05-01 | 深圳市联讯发科技有限公司 | A kind of Switching Power Supply |
| CN208571589U (en) * | 2018-05-29 | 2019-03-01 | 麦克维尔空调制冷(武汉)有限公司 | Switching Power Supply is lightly loaded short-circuit protection circuit |
| CN209560338U (en) * | 2019-05-16 | 2019-10-29 | 广州市宝米勒电气技术有限公司 | A kind of analog output signal switching circuit controlled by CPU |
-
2019
- 2019-12-03 CN CN201911223147.6A patent/CN111176152A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6396137B1 (en) * | 2000-03-15 | 2002-05-28 | Kevin Mark Klughart | Integrated voltage/current/power regulator/switch system and method |
| CN101188413A (en) * | 2007-11-30 | 2008-05-28 | 艾默生网络能源有限公司 | An input simulation detection circuit for frequency converter |
| CN102497197A (en) * | 2011-12-28 | 2012-06-13 | 中冶南方（武汉）自动化有限公司 | Isolated bidirectional digital input output circuit |
| CN105242595A (en) * | 2015-09-28 | 2016-01-13 | 深圳市易驱电气有限公司 | Switching apparatus and switching method of analog input signals |
| CN207304403U (en) * | 2017-10-25 | 2018-05-01 | 深圳市联讯发科技有限公司 | A kind of Switching Power Supply |
| CN208571589U (en) * | 2018-05-29 | 2019-03-01 | 麦克维尔空调制冷(武汉)有限公司 | Switching Power Supply is lightly loaded short-circuit protection circuit |
| CN209560338U (en) * | 2019-05-16 | 2019-10-29 | 广州市宝米勒电气技术有限公司 | A kind of analog output signal switching circuit controlled by CPU |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023071532A1 (en) * | 2021-11-01 | 2023-05-04 | 上海美控智慧建筑有限公司 | Input-output control circuit, controller, and air conditioner |
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