JPH11162756A - Transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transformer which is provided with a function of preventing noise and power source higher harmonics which reflow from a power supply charge to a power source line, and also a power saving function of reducing power consumption of the power supply charge. SOLUTION: Reference numeral L1A is a main winding. Numerals L1B and L1C are auxiliary windings. Numerals 1-4 are winding terminals. Numerals 5 and 6 are electrostatic shield members. Numeral 7 is a core. Numeral E(IN) is input voltage and is connected to a power-frequency single phase two-line power source. Voltages E1 and E1 induced by the auxiliary windings L1B and L1C is about 30% of the input voltage E(IN) and is set E1=E2 in this case. Accordingly, the output voltage E(OUT) and the input voltage E(IN) is the same. Different electronic apparatuses or electrical apparatuses are connected to the rear stage of the output terminals 3 and 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-phase two-wire type or single-phase three-wire type transformer having a function of suppressing noise flowing back from a power load such as electronic equipment to a power supply line and power supply harmonics. It is about.

[0002]

2. Description of the Related Art In recent years, switching regulation
Electronics or household electrical equipment with
Information processing devices that generate I (electromagnetic interference) and RFI (radio frequency interference), power devices that generate strong spike noise and power supply harmonics, or electronic devices or power devices with built-in inverters Various devices and devices are being used in general and in a wide range of fields.

[0003]

As described above, with the spread of electronic equipment or information processing equipment, power supply harmonics having an integral multiple of the power supply frequency (50 Hz, 60 Hz) are provided on the power supply lines of these equipments. Many are being included. This power supply harmonic is generated by distorting the load current of the basic power supply frequency due to the electronic device itself or the information processing device itself,
Particularly in recent years, odd-numbered power supply harmonics (that is, third power supply harmonics, fifth power supply harmonics, seventh power supply harmonics, and the like) have been increasing.

[0004] If these power supply harmonics are included in a power supply line in a large amount, in addition to a macro problem that heat generation and breakage which are inconvenient for a power transmission system may be caused, a power supply voltage waveform may be poor for general users. Since it becomes normal, there arises a problem that various device troubles can be caused.

Further, various kinds of noises generated from electronic devices and the like cause the above-described interference with other electronic devices and communication devices and the like, which also hinders normal device operation. ing.

[0006] For the users themselves (including factories or office work sites), controlling the power consumption has become an important issue as the number of devices to be used increases. .

[0007] In response to such a problem, the Ministry of International Trade and Industry, Agency for Natural Resources and Energy, published the "Guidelines for Measures for Controlling Harmonics of Home Appliances and General-Purpose Products" (September, 1994). The Japan Society for the Promotion of Industry has adopted the “Execution Plan (Draft) for the Guideline for Measures to Control Harmonics for Home Appliances and General-Purpose Products” (2
17).

However, in order to solve the problem of power supply harmonics and noise which has become a half social problem, in practice, for example, a parallel resonance circuit tuned to the power supply harmonic frequency is connected in series to the power load. To remove power supply harmonic components, use equipment that corrects the power supply waveform using an expensive active filter, or devise the rectifier circuit itself inside the power supply to generate a sharp load current waveform. It just doesn't.

Further, in order to reduce the power consumption of an electronic device or a power device, a product which claims to save energy and consumes power under the name of "power saving" is marketed by a plurality of manufacturers. At present, apart from large-scale power consumers equipped with facilities, personal level users are not directly interested in terms of cost.

[0010] Therefore, an object of the present invention is to solve the above problems,
An object of the present invention is to provide a transformer that has a function of suppressing noise and power supply harmonics flowing from a power load such as an electronic device to a power supply line and a power saving function of reducing power consumption of the power load.

Another object of the present invention is to provide a simple and compact single-phase two-wire type or single-phase three-wire type winding structure, and furthermore, if necessary, a connection between a commercial power supply and electronic equipment. In spite of being detachable, it effectively suppresses noise and power supply harmonics flowing from the power load of electronic devices to the power line, and also reduces the power consumption of the power load. It is to provide a transformer which has been made possible.

[0012]

In order to achieve the above object, a transformer according to the present invention has the following arrangement.

Note that the parentheses shown below exemplify the correspondence with reference numerals or numbers described later in the drawings.

According to a first embodiment of the present invention, as shown in FIG. 1, a first input terminal (1), a second input terminal (2) and a first output terminal (3), a second output terminal (4). Single phase 2 with
In a wire-type transformer, a main winding (L1A) having the first input terminal (1) and the second input terminal (2) connected to a single-phase two-wire AC power supply; (L1
A) a winding having a magnetic path common to that of A), one terminal of which is connected to the first input terminal (1), and the other terminal of which is connected to the first output terminal (3). A first sub-winding (L1B) and a winding having a common magnetic path with the main winding (L1A), wherein one terminal is connected to the second input terminal (2) and the other is Are connected to the second output terminal (4), and a second sub-winding (L1C) that generates an electromotive force having a phase opposite to that of the first sub-winding (L1B). And a shield member (5, 6) for electrostatically shielding the first sub-winding (L1B) and the second sub-winding (L1C).

According to a second embodiment of the present invention, as shown in FIG. 18, a first input terminal (21), a second input terminal (22) and a first output terminal (23), a second output terminal (24). And a main winding (L2A) having the first input terminal (21) and the second input terminal (22) connected to a single-phase two-wire AC power supply. And a winding having a common magnetic path with the main winding (L2A),
A first auxiliary winding (L2B) having one terminal connected to the first input terminal (21) and the other terminal connected to the first output terminal (23); (L2
A) a winding having a common magnetic path with A), one terminal of which is connected to the second input terminal (22), and the other terminal of which is connected to the second output terminal (24). Second
And a shield member (25, 26) for electrostatically shielding the first sub-winding (L2B) and the second sub-winding (L2C), respectively. The connection (E (OUT) = E1 + E2) is such that the electromotive force in the first and second sub windings (L2B, L2C) is both polarities with the electromotive force in the main winding (L2A). .

Here, in the transformer according to the first or second embodiment (FIGS. 1 and 18), the magnitude of the electromotive force (E1) caused by the first sub windings (L1B, L2B) and It is preferable to set the magnitude of the electromotive force (E2) by the second sub windings (L1C, L2C) to be equal or to set the magnitude with a predetermined magnitude relationship.

According to a third embodiment of the present invention, as shown in FIG. 22, a single-phase two-phase winding in which a primary winding (L3A) and a secondary winding (L3B) are wound on a common core (37). In a wire-type transformer, a connection means for connecting a first input terminal (31), which is one terminal of the primary winding (L3A), and a midpoint (M) of the secondary winding (L3B). (38) and a second input terminal (32) which is the other terminal of the primary winding (L3A).
And a first capacitor (C1) and a second capacitor (C2) respectively connected between a first output terminal (33) and a second output terminal (34) which are terminals of the secondary winding (L3B). ) And the primary winding (L3A) or the 2
A shield member (35) for electrostatically shielding one of the next windings (L3B).

According to a fourth embodiment of the present invention, as shown in FIG. 35, a primary winding (L4A) and a secondary winding (L4B) are wound on a common core (47) to achieve a first mode. In a single-phase two-wire transformer for isolating a secondary side and a secondary side, a first input terminal (42) which is one terminal of the primary winding (L4A) and the secondary winding ( L4B) and a coupling capacitor (C3) connecting the middle point (M) to the primary winding (L4B).
4A), a second input terminal (41) which is the other terminal, and a first output terminal (4) which is a terminal of the secondary winding (L4B).
3) and a first capacitor (C1) and a second capacitor (C2) respectively connected between the second output terminal (44) and the primary winding (L4A) or the secondary winding (L4B). ), And a shielding member (45) for electrostatically shielding either one of them.

Here, in the transformer according to the third or fourth embodiment (FIGS. 22 and 35), the output voltage (E (OUT)) of the secondary windings (L3B, L4B) is set to 1 The input voltage (E (I (I)) of the next winding (L3A, L4A)
N)) or the input voltage (E (I (I
N)) is preferably set lower.

In a fifth embodiment of the present invention, as shown in FIG. 37, a first input terminal (51), a neutral line input terminal (52),
In a single-phase three-wire transformer including a second input terminal (53), a first output terminal (54), a neutral output terminal (55), and a second output terminal (56), a single-phase three-wire transformer is provided. A first main winding (LL5A) having the first input terminal (51), the neutral line input terminal (52), and the second input terminal (53) connected to an AC power supply; Main winding (L
L5A) and a winding having a common magnetic path,
A second main winding (LL5B) having three input terminals connected in parallel with the input terminal (51), the neutral line input terminal (52), and the second input terminal (53), respectively;
And the first and second main windings (LL5A, LL5).
5B) a two-terminal winding having a common magnetic path with that of
One of the two terminals is connected to the first main winding (LL5
A) a first auxiliary winding (L5A) connected to the second input terminal (53) in (A) and the other terminal connected to the second output terminal (56); A winding with two terminals having a common magnetic path with the second main winding (LL5A, LL5B), wherein one of the two terminals is connected to the second main winding (LL5B). A second sub-winding (L5B) connected to one input terminal (51) side terminal and the other terminal connected to the first output terminal (54); (L5A)
And a shield member (58, 59) for electrostatically shielding the second sub winding (L5B), respectively, and the neutral line input terminal (52) and the neutral line output terminal (55) are coupled. And a first output voltage (E2-e2) between the neutral line output terminal (55) and the first output terminal (54), and the neutral line output. The second output voltage (E1-e1) between the terminal (55) and the second output terminal (56) is connected to be lower than the line voltage (E2, E1) of the three-wire AC power supply, respectively. Things.

According to a sixth embodiment of the present invention, as shown in FIG. 40, a first input terminal (63), a neutral line input terminal (62),
In a single-phase three-wire transformer having a second input terminal (61), a first output terminal (66), a neutral output terminal (65), and a second output terminal (64), a single-phase three-wire transformer A first main winding (LL6A) having the neutral line input terminal (62) and the first input terminal (63) connected to a neutral line and one voltage line of an AC power source; The neutral line input terminal (62) and the second input terminal (6) connected to the neutral line and the other voltage line of the three-wire AC power supply.
1), wherein the first main winding (LL6
Second main winding (LL6B) having a common magnetic path with A)
And the first and second main windings (LL6A, LL6).
6B) a two-terminal winding having a common magnetic path with that of
One of the two terminals is connected to the first main winding (LL6
(A) a first sub-winding (L6A) connected to the first input terminal (63) and the other terminal connected to the first output terminal (66); A winding with two terminals having a common magnetic path with the second main winding (LL6A, LL6B), wherein one of the two terminals is the second terminal in the second main winding (LL6B).
A second sub-winding (L6B) connected to the input terminal (61) and the other terminal connected to the second output terminal (64); the first sub-winding (L6A); Shield members (68, 69) for electrostatically shielding the second sub-winding (L6B), respectively;
2) and a connection line (NL) for coupling the neutral line output terminal (65), and a first line between the neutral line output terminal (65) and the first output terminal (66). An output voltage (E1-e1) and the neutral output terminal (65)
And the second output terminal (64) is connected such that the second output voltage (E2-e2) is lower than the line voltage (E1, E2) of the three-wire AC power supply.

[0022]

(Embodiment 1) FIG. 1 shows a circuit showing a single-phase two-wire transformer according to a first embodiment of the present invention, and FIG. 2 shows an equivalent circuit of FIG. In these figures, L1A is a main winding, L1B and L1C are sub windings,
1 to 4 are winding terminals, 5 and 6 are electrostatic shield members, and 7 is a core. E (IN) is an input voltage, which is connected to a commercial single-phase two-wire power supply. Sub winding L
The magnitudes of the voltages E1 and E2 induced in 1B and L1C are
It is about 30% of the input voltage E (IN), and E1 = E2 in the case of the present embodiment. Therefore, as is clear from the equivalent circuit shown in FIG.
(OUT) and the input voltage E (IN) have the same magnitude.

Various electronic devices or electric devices (not shown) are connected to the output terminals 3 and 4 at the subsequent stage.

That is, the transformer according to the first embodiment of the present invention has a first input terminal 1 and a second input terminal 1 as shown in FIG.
This is a single-phase two-wire transformer including an input terminal 2, a first output terminal 3, and a second output terminal 4. The main winding L of this transformer
1A has a first input terminal 1 and a second input terminal 2 connected to a single-phase two-wire AC power supply. The first auxiliary winding L1B is a winding having a common magnetic path with the main winding L1A. One terminal is connected to the first input terminal 1 and the other terminal is connected to the first input terminal 1. It is connected to the output terminal 3. Further, the second sub-winding L1C is a winding having a common magnetic path with the main winding L1A, and one terminal is connected to the second input terminal 2 and the other terminal is connected to the second output terminal. It is connected to the terminal 4 and generates an electromotive force having a phase opposite to that of the first sub winding L1B. The shield members 5 and 6 include a first sub-winding L1B and a second sub-winding L1.
C is electrostatically shielded.

Next, specific electrical characteristics of the present embodiment will be described.

FIG. 3 is a frequency characteristic diagram showing a power supply terminal disturbance voltage inherently generated by an electric drill having a certain series motor. To obtain the measurements in FIG.
R (Publicatio of International Radio Injury Special Committee)
A measurement system shown in (A) of FIG. 42, which is based on n11 (class A) or the like, was used. That is, an electric drill which is an EUT (test equipment or device under test) 100,
A pseudo power supply network 104 is inserted between a C power supply (50 Hz, 100 volts AC) 102. The artificial power supply network 104 is a well-known device used to standardize the measurement of conducted disturbance emitted from the EUT (test equipment) 100 via a power supply line. By eliminating line noise, unnecessary external signals are prevented from flowing into the EUT 100, the impedance when the AC power source 102 is viewed from the EUT 100 is kept constant, and Only the emitted noise is analyzed by the spectrum analyzer 106.
Fulfills the function of leading to In the present embodiment, as the pseudo power supply network 104, ROHDE & SCH
ESH2-Z5 manufactured by WARZ was used. Also, as the spectrum analyzer 106, HEWLETT PAC
8566B manufactured by KARD was used. Reference numeral 108 in FIG. 42 denotes a data processing device (CPU), and 110 denotes a printer.

In the following description, the measurement of the power supply terminal disturbance voltage is performed in accordance with the measurement system shown in FIG.

FIG. 4 shows the transformer (E (I
N) = 100V, E1 = E2 = 30V, E (OUT) =
FIG. 4 is a characteristic diagram showing a power supply terminal disturbance voltage obtained when the electric drill described in FIG. 3 is connected to the output terminals 3 and 4 of 100 V). As is clear from the comparison between FIG. 3 and FIG. 3, the noise suppressing effect of the transformer shown in FIG. 1 is remarkable.

FIG. 5 is a characteristic diagram showing a power supply harmonic current originally generated by a certain switching power supply itself. FIG. 42B shows a measurement system based on EN 60 555 Part 2 or the like for measuring the power supply harmonic current.

In FIG. 42B, reference numeral 200 denotes a switching power supply as a test device, 202 denotes an AC power supply (50 Hz, 100 VAC), 204 denotes a pseudo power supply network,
206 is a power harmonic current measuring device, 208 is a data processing device, and 210 is a printer. In the present embodiment, Kikusui Electronics Co., Ltd.
LIN31-PCR manufactured by the company was used. As the power supply harmonic current measuring device 206, a PCR-2000L with a remote control option card RCO2-PCR-L manufactured by the company was used.

In the following description, the measurement of the power supply harmonic current is all performed in accordance with the measurement system shown in FIG.

FIG. 6 shows the transformer (E (I (I)) shown in FIG.
N) = 100V, E1 = E2 = 30V, E (OUT) =
FIG. 6 is a characteristic diagram illustrating power supply harmonic current when the switching power supply described in FIG. 5 is connected to output terminals 3 and 4 of 100 V). As is clear from the comparison between FIG. 5 and FIG. 5, the effect of removing the power supply harmonic current of the transformer shown in FIG. 1 is remarkable.

FIG. 7 is a characteristic diagram showing a power supply harmonic current originally generated by an inverter fluorescent lamp itself.

FIG. 8 shows the transformer (E (I (I)) shown in FIG.
N) = 100V, E1 = E2 = 30V, E (OUT) =
FIG. 9 is a characteristic diagram illustrating power supply harmonic current when the inverter fluorescent lamp described with reference to FIG. 7 is connected to output terminals 3 and 4 of 100 V). As is clear from comparison between FIG. 7 and FIG. 7, the effect of removing the power supply harmonic current of the transformer shown in FIG. 1 is remarkable.

FIG. 9 is a frequency characteristic diagram showing a power supply terminal disturbance voltage inherently generated by an electric drill having a certain series motor (having almost the same characteristics as FIG. 3).

FIG. 10 shows the transformer (E (IN) = 100 V, E1 = E2 = 30 V,
FIG. 10 is a characteristic diagram illustrating a power supply terminal disturbance voltage when the electric drill described in FIG. 9 is connected to the output terminals 3 and 4 of E (OUT) = 100 V). As is clear from the comparison between FIG. 9 and FIG. 9, even when the shields 5 and 6 are removed, the noise suppressing effect of the transformer shown in FIG. 1 is remarkable.

FIG. 11 shows the shielded transformer (E (IN) = 100 V, E1 = E2 = 30 V,
FIG. 10 is a characteristic diagram illustrating a power supply terminal disturbance voltage when the electric drill described in FIG. 9 is connected to the output terminals 3 and 4 of E (OUT) = 100 V). As is clear from the comparison between FIG. 9 and FIG. 9, when the shields 5 and 6 are added, the noise suppressing effect of the transformer shown in FIG. 1 is more remarkable.

FIG. 12 is a characteristic diagram showing a power supply harmonic current originally generated by a certain switching power supply itself (having almost the same characteristics as FIG. 5).

FIG. 13 shows the detailed data of FIG.

FIG. 14 shows the transformer (E (I
N) = 100V, E1 = E2 = 30V, E (OUT) =
FIG. 13 is a characteristic diagram illustrating power supply harmonic current when the switching power supply described in FIG. 12 is connected to output terminals 3 and 4 of 100 V). FIG. 15 shows the detailed data of FIG. As is apparent from a comparison between FIG. 14 and FIG. 5,
The power supply harmonic current removing effect of the transformer shown in FIG. 1 is remarkable.

FIG. 16 shows the transformer (E (I
N) = 100V, E1 = E2 = 50V, E (OUT) =
FIG. 13 is a characteristic diagram illustrating power supply harmonic current when the switching power supply described in FIG. 12 is connected to output terminals 3 and 4 of 100 V). This figure shows the measured values when E1 = E2 = 50 V. As apparent from comparison with FIG. 5, FIG.
The effect of eliminating the power supply harmonic current of the transformer shown in FIG.

FIG. 17 shows the detailed data of FIG.

In the transformer according to the first embodiment described above with reference to FIGS. 1 to 17 (FIG. 1), the magnitude of the electromotive force (E1) caused by the first sub winding L1B and the second Although the case where the magnitude of the electromotive force (E2) by the sub winding L1C is set equal has been described, a predetermined magnitude relationship (that is, E1 ≠ E2, for example, E1 = 30 volts, E2 = 3).
5 volts), the output voltage E (OU
T) is less than 100 volts (ie, E (IN)> E
(OUT), for example, E (OUT) = 95 volts). As a result, it is possible to further enhance the power saving effect on the power load of the electric device.

(Embodiment 2) FIG. 18 is a circuit showing a second embodiment of the present invention, and FIG. 19 is an equivalent circuit of FIG. The embodiment described here is basically the same as the first embodiment described above, but in the transformer shown in FIG. 1, both E1 and E2 are polar-connected (that is, the output is Voltage E (OUT) = 100V + 5
0V + 50V: E1 = E2 = 50V).

More specifically, according to the second embodiment of the present invention, as shown in FIG.
A single-phase two-wire transformer having a second input terminal 22, a first output terminal 23, and a second output terminal 24, wherein (1) a first input connected to a single-phase two-wire AC power supply. (2) a main winding L2A having a terminal 21 and a second input terminal 22;
A winding having a magnetic path common to the main winding L2A, one terminal of which is connected to the first input terminal 21 and the other terminal of which is connected to the first output terminal 23. A winding having a magnetic path common to the winding L2B and (3) the main winding L2A. One terminal is connected to the second input terminal 22 and the other terminal is connected to the second output terminal 24. A second sub-winding L2C connected thereto, and (4) a first sub-winding L2B
And shield members 25 and 26 for electrostatically shielding the second and third sub-windings L2C, respectively, so that the electromotive force generated in the first and second sub-windings L2B and L2C is the same as that of the main winding L2.
A (E (OUT))
= E1 + E2).

FIG. 20 is a characteristic diagram showing a power supply harmonic current originally generated by a certain switching power supply itself (having almost the same characteristics as FIG. 5).

FIG. 21 shows the transformer (E) shown in FIG.
(IN) = 100V, E1 = E2 = 50V, E (OU
T) = 200 V) to the output terminals 23 and 24,
FIG. 21 is a characteristic diagram showing power supply harmonic current when the switching power supply described in FIG. 20 is connected via (00V → 100V). As is clear from comparing FIG. 20 with FIG.
The power supply harmonic current removing effect of the transformer shown in FIG. 18 is remarkable. In particular, there is obtained an effect that high-order harmonics generated from a non-linear load are considerably reduced.

In the transformer according to the second embodiment (FIG. 18), the magnitude of the electromotive force (E1) caused by the first sub winding L2B and the magnitude of the electromotive force (E1) caused by the second sub winding L2C are described. It is possible not only to set the magnitude of the electric power (E2) equal, but also to set it with a predetermined magnitude relation.

(Embodiment 3) FIG. 22 shows a circuit showing a third embodiment to which the present invention is applied, and FIG. 23 shows an equivalent circuit of FIG.

The transformer shown in FIG. 22 has a bridge configuration without isolation between the primary side and the secondary side. That is, in a single-phase two-wire transformer in which the primary winding L3A and the secondary winding L3B are wound on a common core 37, (1) the first terminal which is one terminal of the primary winding L3A; A connection 38 connecting the input terminal 31 and the midpoint M of the secondary winding L3B; (2) a second input terminal 32 which is the other terminal of the primary winding L3A; and a terminal of the secondary winding L3B. A first capacitor C1 and a second capacitor C connected between a first output terminal 33 and a second output terminal 34, respectively.
2 and (3) a shield member 35 for electrostatically shielding either the primary winding L3A or the secondary winding L3B.

Here, in the transformer according to the third embodiment (FIG. 22), the output voltage (E (OUT)) of the secondary winding L3B is changed to the input voltage (E) of the primary winding L3A.
(IN)) or set lower than the input voltage (E (IN)) for the purpose of the power saving function of the load.

FIG. 24 is a frequency characteristic diagram showing the power supply terminal disturbance voltage inherently generated by an electric drill having a certain series motor (having almost the same characteristics as FIG. 3).

FIG. 25 shows the transformer (E) shown in FIG.
(IN) = 100V, E1 = E2 = 50V, E (OU
FIG. 25 is a characteristic diagram showing a power supply terminal disturbance voltage when the electric drill described in FIG. 24 is connected to the output terminals 33 and 34 of (T) = 100 V). As is clear from the comparison between FIG. 24 and FIG. 24, the noise suppressing effect of the transformer shown in FIG. 22 is remarkable. In particular, the transformer shown in FIG. 22 is effective at 150 kHz or less, which is not regulated by international standards, and it is difficult to reduce noise in this region with a general noise cut transformer.

FIG. 26 is a characteristic diagram showing a power supply harmonic current originally generated by a certain inverter fluorescent lamp itself (having almost the same characteristics as FIG. 7).

FIG. 27 shows the transformer (E) shown in FIG.
(IN) = 100V, E1 = E2 = 50V, E (OU
FIG. 27 is a characteristic diagram illustrating a power supply harmonic current when the inverter fluorescent lamp described with reference to FIG. 26 is connected to the output terminals 33 and 34 of (T) = 100 V). FIG. 28 shows the detailed data of FIG. As is clear from a comparison between FIG. 27 and FIG. 26, the effect of removing the power supply harmonic current of the transformer shown in FIG. 22 is remarkable.

More specifically, the power factor in the case of FIG. 26 (without transformer) was 0.59,
In FIG. 27, it is improved to 0.80. Looking at the power consumption, in the case of FIG.
What was 7.6 W is 49.3 W in the case of FIG.
Has decreased.

As described above, the addition of the transformer shown in FIG. 22 improves the four items of noise, power source harmonics, power factor, and power consumption.

It is preferable that the two windings on the output side have a structure that is as symmetrical as possible.

FIG. 29 is a characteristic diagram showing a power supply harmonic current originally generated by a certain switching power supply itself (having almost the same characteristics as FIG. 5).

FIG. 30 shows the transformer (E) shown in FIG.
(IN) = 100V, E1 = E2 = 5V, E (OUT)
30 is a characteristic diagram showing power supply harmonic current when the switching power supply described in FIG. 29 is connected to the output terminals 33 and 34 (= 100 V). As is clear from the comparison between FIG. 29 and FIG. 29, the effect of removing the power supply harmonic current of the transformer shown in FIG. 22 is remarkable.

FIG. 31 is a characteristic diagram showing a power supply harmonic current originally generated by a certain switching power supply itself (having almost the same characteristics as FIG. 5).

FIG. 32 shows the transformer (E) shown in FIG.
(IN) = 100V, E1 = E2 = 15V, E (OU
T) = 30 V) to the output terminals 33 and 34 via a booster (step-up transformer) to 100 volts (not shown) to connect the power supply harmonic current when the switching power supply described in FIG. 31 is connected. FIG. This figure and FIG. 31
As is clear from the comparison, the effect of removing the power supply harmonic current of the transformer shown in FIG. 22 is remarkable.

FIG. 33 is a characteristic diagram showing a power supply harmonic current originally generated by a certain inverter fluorescent lamp itself (having almost the same characteristics as FIG. 7).

FIG. 34 shows the transformer (E) shown in FIG.
(IN) = 100V, E1 = E2 = 15V, E (OU
T) is a characteristic diagram showing power supply harmonic currents when the inverter fluorescent lamps described in FIG. 33 are connected to the output terminals 33 and 34 via the booster to 100 volts (not shown) to the output terminals 33 and 34 (not shown). is there. As is clear from the comparison between FIG. 33 and FIG. 33, the effect of removing the power supply harmonic current of the transformer shown in FIG. 22 is remarkable.

(Embodiment 4) FIG. 35 shows a circuit showing a fourth embodiment to which the present invention is applied, and FIG. 36 shows an equivalent circuit of FIG.

The transformer shown in FIG. 35 is a transformer having a bridge configuration in which a capacitor C3 is inserted to perform isolation between the primary side and the secondary side. That is, 1
In a single-phase two-wire transformer in which the primary and secondary sides are isolated by winding the secondary winding L4A and the secondary winding L4B on a common core 47, (1) the primary Winding L4A
The first input terminal 42, which is one of the terminals, and the secondary winding L4
A coupling capacitor C3 connecting the midpoint M of B, (2)
The second input terminal 41 which is the other terminal of the primary winding L4A
A first capacitor C1 and a second capacitor C2 respectively connected between the first output terminal 43 and the second output terminal 44, which are terminals of the secondary winding L4B, and (3) 1
And a shield member 45 for electrostatically shielding either the secondary winding L4A or the secondary winding L4B.

Here, in the transformer according to the fourth embodiment (FIG. 35), the output voltage (E (OUT)) of the secondary winding L4B is changed to the input voltage (E) of the primary winding L4A.
(IN)) or set lower than the input voltage (E (IN)) for the purpose of the power saving function of the load.

(Embodiment 5) FIG. 37 shows a circuit showing a fifth embodiment to which the present invention is applied, and FIG. 38 shows an equivalent circuit of FIG.

The transformer shown in FIG. 37 comprises a first input terminal 51, a neutral input terminal 52, a second input terminal 53 and a first output terminal 54, a neutral output terminal 55, and a second output terminal 5.
6 is a single-phase three-wire transformer provided with:
A first main winding LL5A having a first input terminal 51, a neutral line input terminal 52, and a second input terminal 53 connected to a linear AC power supply; and (2) common to the first main winding LL5A. A second main winding LL5B having three input terminals connected in parallel with the first input terminal 51, the neutral line input terminal 52, and the second input terminal 53, respectively. And (3) the first and second main windings LL5A,
A winding with two terminals having a common magnetic path with LL5B, wherein one of the two terminals is a first main winding LL5A.
, A first auxiliary winding L5A whose other terminal is connected to the second output terminal 56, and (4) a first and second main winding LL5A, L
A two-terminal winding having a common magnetic path with L5B,
One of the two terminals is connected to the first input terminal 51 side terminal of the second main winding LL5B,
A second sub-winding L5B having the other terminal connected to the first output terminal 54; and (5) a first sub-winding L5A and a second sub-winding L5A.
(6) a connection line NL that couples the neutral line input terminal 52 and the neutral line output terminal 55 to each other. )
A first output voltage (E2-e2) between the neutral output terminal 55 and the first output terminal 54, and a second output voltage (E1) between the neutral output terminal 55 and the second output terminal 56 -E1) are respectively connected so as to be lower than the line voltage (E2, E1) of the three-wire AC power supply.

FIG. 39 shows the transformer (E1) shown in FIG.
= E2 = 100V, e1 = e2 = 5V) output terminal 5
FIG. 4 is a characteristic diagram showing power supply terminal disturbance voltages when the electric drill described above with reference to FIG. As is clear from the comparison between FIG. 3 and FIG. 3, the noise suppressing effect of the transformer shown in FIG. 37 is remarkable. (Embodiment 6) FIG. 40 shows a circuit showing a sixth embodiment to which the present invention is applied, and FIG. 41 shows an equivalent circuit of FIG.

The transformer shown in FIG. 40 has a first input terminal 63, a neutral line input terminal 62, a second input terminal 61 and a first output terminal 66, a neutral line output terminal 65, and a second output terminal 6.
4. In the single-phase three-wire transformer provided with
A first main winding LL6A having a neutral line input terminal 62 and a first input terminal 63 connected to a neutral line and one voltage line of a linear AC power supply; and (2) a single-phase three-wire AC A winding having a neutral line input terminal 62 and a second input terminal 61 connected to the neutral line and the other voltage line of the power supply, and having a magnetic path common to the first main winding LL6A. 2 main windings LL6B, and (3) first and second main windings LL
6A, LL6B and a two-terminal winding having a common magnetic path, wherein one of the two terminals is a first main winding LL.
6A, a first auxiliary winding L6A connected to the first input terminal 63 and the other terminal connected to the first output terminal 66; and (4) a first and second main winding LL6.
A, LL6B is a winding with two terminals having a common magnetic path, and one of the two terminals is connected to the second main winding LL6.
B, a second sub-winding L6B connected to the second input terminal 61 and the other terminal connected to the second output terminal 64; and (5) a first sub-winding L6A and a second sub-winding L6A. A shield member 6 for electrostatically shielding the sub windings L6B respectively
8, 69, and (6) a connection line NL that couples the neutral line input terminal 62 and the neutral line output terminal 65, and (7) the neutral line output terminal 65 and the first output terminal 66 First in between
Output voltage (E1-e1) and neutral output terminal 65
A second output voltage (E2) between the second output terminal 64 and the second output terminal 64
-E2) are the line voltages (E1,
E2) The connection is made lower.

[0072]

As described above, according to the present invention, it is possible to effectively suppress noise and power supply harmonics flowing back from a power load such as an electronic device to a power supply line. Moreover, it can also have a power saving function of reducing the power consumption of the power load.

In addition, according to the present invention, there is provided a simple and compact single-phase two-wire or single-phase three-wire winding configuration,
Despite being able to be freely attached and detached between the commercial power supply and electronic equipment as needed, the power supply terminal disturbance voltage or power supply harmonic current flowing from the power load of electronic equipment etc. to the power supply line is extremely effectively In addition to suppressing the power consumption, the power consumption of the power load can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is an equivalent circuit diagram of FIG.

FIG. 3 is a diagram showing a power terminal disturbance voltage of an electric drill provided with a series motor.

FIG. 4 shows the transformer shown in FIG.
FIG. 4 is a diagram showing a power supply terminal disturbance voltage obtained by a combination with the electric drill shown in FIG. 3.

FIG. 5 is a diagram showing a power supply harmonic current of a switching power supply.

FIG. 6 shows the transformer shown in FIG.
FIG. 6 is a diagram showing a power supply harmonic current obtained by a combination with the switching power supply shown in FIG. 5.

FIG. 7 is a diagram showing a power supply harmonic current of an inverter fluorescent lamp.

FIG. 8 shows the transformer shown in FIG.
FIG. 8 is a diagram showing a power supply harmonic current obtained by combination with the inverter fluorescent lamp shown in FIG. 7.

FIG. 9 is a view showing a power supply terminal disturbance voltage (almost the same as FIG. 3) of an electric drill having a series-wound motor.

10 is a diagram showing a power supply terminal disturbance voltage obtained by a combination of the transformer of FIG. 1 shown in Embodiment 1 with the shield removed and the electric drill shown in FIG. 9;

11 is a diagram showing a power supply terminal disturbance voltage obtained by combining the transformer of FIG. 1 with the shield shown in FIG. 1 and the electric drill shown in FIG. 9 as the first embodiment.

FIG. 12 is a diagram showing power supply harmonic currents (almost the same as FIG. 5) of the switching power supply.

FIG. 13 is a diagram showing detailed data of FIG.

FIG. 14 is a diagram showing power supply harmonic currents obtained by a combination of the transformer shown in FIG. 1 according to the first embodiment and the switching power supply shown in FIG. 12;

FIG. 15 is a diagram showing detailed data of FIG.

16 is a diagram showing power supply harmonic currents obtained by a combination of the transformer of FIG. 1 shown as the first embodiment and the switching power supply shown in FIG. 12;

FIG. 17 is a diagram showing detailed data of FIG. 16;

FIG. 18 shows a second embodiment of the present invention in which E1 and E2 in the transformer shown in FIG.
FIG. 6 is a diagram illustrating a transformer in which (00V + 50V + 50V: E1 = E2 = 50V)

FIG. 19 is an equivalent circuit diagram of FIG. 18;

FIG. 20 is a diagram showing a power supply harmonic current (almost the same as FIG. 5) of the switching power supply.

21 is a diagram showing power supply harmonic currents obtained by a combination of the transformer of FIG. 18 shown as the second embodiment and the switching power supply shown in FIG. 20;

FIG. 22 shows a transformer having a bridge configuration (without primary-side / secondary-side isolation) as Embodiment 3 of the present invention.
FIG.

FIG. 23 is an equivalent circuit diagram of FIG. 22.

FIG. 24 is a view showing a power supply terminal disturbance voltage (almost the same as FIG. 3) of an electric drill having a series-wound motor.

25 is a diagram showing a power supply terminal disturbance voltage obtained by a combination of the transformer shown in FIG. 22 according to the third embodiment without isolation and the electric drill shown in FIG. 24;

26 is a diagram showing a power supply harmonic current (almost the same as FIG. 7) of the inverter fluorescent lamp.

FIG. 27 is a diagram showing power supply harmonic currents obtained by combining the transformer of FIG. 22 shown as the third embodiment with the inverter fluorescent lamp shown in FIG. 26;

FIG. 28 is a diagram showing detailed data of FIG. 27.

FIG. 29 is a diagram showing power supply harmonic currents (almost the same as FIG. 5) of the switching power supply.

30 is a diagram showing power supply harmonic currents obtained by a combination of the transformer of FIG. 22 shown as the third embodiment and the switching power supply shown in FIG. 29;

FIG. 31 is a diagram showing power supply harmonic currents (almost the same as FIG. 5) of the switching power supply.

32 is a diagram showing power supply harmonic currents obtained by a combination of the transformer of FIG. 22 shown as the third embodiment and the switching power supply shown in FIG. 31.

FIG. 33 is a diagram showing a power supply harmonic current (almost the same as FIG. 7) of the inverter fluorescent lamp.

34 is a diagram showing power supply harmonic currents obtained by combining the transformer of FIG. 22 shown as the third embodiment with the inverter fluorescent lamp shown in FIG. 34;

FIG. 35 is a diagram showing a transformer (having primary-side and secondary-side isolation) having another bridge configuration according to the fourth embodiment of the present invention;

FIG. 36 is an equivalent circuit diagram of FIG. 35;

FIG. 37 is a diagram showing a single-phase three-wire transformer according to a fifth embodiment of the present invention.

FIG. 38 is an equivalent circuit diagram of FIG. 37.

39 is a diagram showing a power supply terminal disturbance voltage obtained by combining the single-phase three-wire transformer shown in FIG. 37 as the fifth embodiment with the electric drill shown in FIG. 3;

FIG. 40 is a diagram showing another single-phase three-wire transformer according to the sixth embodiment of the present invention.

FIG. 41 is an equivalent circuit diagram of FIG. 40.

FIG. 42 is a circuit diagram for measuring a power supply terminal disturbance voltage and a power supply harmonic current of a device under test.

Claims (8)

[Claims] A first input terminal, a second input terminal, and a first input terminal;
A single-phase two-wire transformer having an output terminal and a second output terminal, wherein a main winding having the first input terminal and the second input terminal connected to a single-phase two-wire AC power supply; A winding having a common magnetic path with the main winding, wherein one terminal is connected to the first input terminal and the other terminal is connected to the first output terminal. A winding and a winding having a common magnetic path with the main winding, wherein one terminal is connected to the second input terminal and the other terminal is connected to the second output terminal. And a second sub-winding that generates an electromotive force having a phase opposite to that of the first sub-winding, and electrostatically shields the first sub-winding and the second sub-winding, respectively. A transformer comprising: a shield member; 2. A first input terminal, a second input terminal and a first input terminal.
A single-phase two-wire transformer having an output terminal and a second output terminal, wherein a main winding having the first input terminal and the second input terminal connected to a single-phase two-wire AC power supply; A winding having a common magnetic path with the main winding, wherein one terminal is connected to the first input terminal and the other terminal is connected to the first output terminal. A winding, and a winding having a common magnetic path with the main winding, wherein one terminal is connected to the second input terminal and the other terminal is connected to the second output terminal. A second sub-winding; and a shield member that electrostatically shields the first sub-winding and the second sub-winding, respectively. A transformer connected so that both the electromotive force and the electromotive force of the main winding become polarities. 3. The transformer according to claim 1, wherein the magnitude of the electromotive force by the first sub-winding is set equal to the magnitude of the electromotive force by the second sub-winding, or A transformer set with a predetermined magnitude relationship. 4. A single-phase two-wire transformer in which a primary winding and a secondary winding are wound on a common core, wherein a first input terminal which is one terminal of the primary winding is provided. Connection means for connecting the middle point of the secondary winding, a second input terminal as the other terminal of the primary winding, a first output terminal as a terminal of the secondary winding, and a second input terminal. A first capacitor and a second capacitor respectively connected to the output terminal;
And a shield member that electrostatically shields one of the primary winding and the secondary winding. 5. A single-phase two-wire transformer in which a primary winding and a secondary winding are wound on a common core to isolate a primary side and a secondary side from each other. A first input terminal that is one terminal of the secondary winding, a coupling capacitor that connects the midpoint of the secondary winding, a second input terminal that is the other terminal of the primary winding, A first capacitor and a second capacitor connected between a first output terminal and a second output terminal,
And a shield member that electrostatically shields one of the primary winding and the secondary winding. 6. The transformer according to claim 4, wherein an output voltage of the secondary winding is set to be equal to or lower than an input voltage of the primary winding. A transformer. 7. A single-phase, three-wire transformer comprising a first input terminal, a neutral input terminal, a second input terminal, a first output terminal, a neutral output terminal, and a second output terminal. A first main winding having the first input terminal, the neutral input terminal, and the second input terminal connected to a phase three-wire AC power supply; Winding having a path,
The first input terminal, the neutral line input terminal, and the second
A second main winding having three input terminals respectively connected in parallel with the input terminal; and a two-terminal winding having a magnetic path common to the first and second main windings. A first sub-winding having one terminal connected to the second input terminal of the first main winding and the other terminal connected to the second output terminal; A winding with two terminals having a common magnetic path with the first and second main windings, wherein one of the two terminals is connected to the first input of the second main winding. A second sub-winding connected to a terminal on the terminal side and the other terminal connected to the first output terminal; and a first sub-winding and a second sub-winding each connected to the first output terminal. A shield member for electrically shielding, and a connection line connecting the neutral input terminal and the neutral output terminal. A first output voltage between the neutral output terminal and the first output terminal, and a neutral output terminal and the second output terminal.
The second output voltage between the output terminal and the output terminal is 3
A transformer which is connected so as to be lower than a line voltage of a line AC power supply. 8. A single-phase, three-wire transformer having a first input terminal, a neutral input terminal, a second input terminal, a first output terminal, a neutral output terminal, and a second output terminal, wherein: A first main winding having the neutral input terminal and the first input terminal connected to a neutral line and one voltage line of a phase three-wire AC power source; and the single-phase three-wire AC power source. The neutral line input terminal connected to the neutral line and the other voltage line, and the second
A winding having an input terminal, a second main winding having a common magnetic path with the first main winding, and having a common magnetic path with the first and second main windings A winding with two terminals, wherein one of the two terminals is connected to the first input terminal of the first main winding and the other terminal is connected to the first output terminal. A first auxiliary winding, and a two-terminal winding having a common magnetic path with the first and second main windings, wherein one of the two terminals is the second main winding. A second sub-winding connected to the second input terminal of the winding and the other terminal being connected to the second output terminal; a first sub-winding and the second sub-winding A shield member for electrostatically shielding a wire, and a connection wire connecting the neutral input terminal and the neutral output terminal. A first output voltage between the neutral output terminal and the first output terminal; and a neutral output terminal between the neutral output terminal and the second output terminal.
The second output voltage between the output terminal and the output terminal is 3
A transformer which is connected so as to be lower than a line voltage of a line AC power supply.