JP2002078350A - Single-phase, three-wire ac - dc two-way converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single-phase, three-wire AC - DC two-way converter that is redu in size and is formed at a low cost. SOLUTION: The single-phase, three-wire AC - Dc two-way converter comprises a single-phase three-wire alternating-current power supply 2, a changeable and dischargeable battery 3, first to fourth switching elements Q1 to Q4, a first and a second reactors L1 and L2, first to fourth diodes D1 to D4 parallel- connected with the first to fourth switching elements Q1 to Q4, respectively, a first capacitor element C3 for high-frequency noise absorption, a second and a third capacitor elements C4 and C5, a fifth and a sixth diodes D5 and D6, a switch 4, and a control circuit 5 that controls the turn-on and -off of the first to fourth switching elements Q1 to Q4 and the switch 4. Since an AC - DC charger and a DC - AC inverter are put in a single circuit, the converter allows further simplification of circuitry, as compared with the conventional converters and enables reduction in size, price, and power consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-wire three-wire AC / DC converter for converting power energy bidirectionally between AC power and DC power using a single main circuit with high efficiency and low distortion.
It relates to a DC bidirectional converter. In particular, it is intended for devices that charge and discharge various batteries with low loss.The most typical example is to store power using nighttime power in order to equalize day-night power, which has recently become a topic, And a technology for regenerating electric power.

[0002]

2. Description of the Related Art Effective utilization of electric power energy is now a global problem, and in particular, imbalance between power supply and distribution systems between day and night has contributed to a reduction in the utilization rate of power generation equipment.

[0003] In Japan, electric power companies are trying to equalize the power consumption of ordinary households by setting the late-night power rate system to about 1/3 in the daytime and to equalize the power consumption per day. Requires the development of inexpensive energy storage devices.

[0004] A method generally used for storing electric power at night and regenerating during the day is that the most efficient method is to convert an alternating current into a direct current, charge the battery, and regenerate the charged power to the AC side. However, it is necessary to extend the life of the battery itself and make it economical, and also to rationalize and make the conversion device for AC / DC and DC / AC more economical.

[0005]

FIG. 10 is a block diagram showing a schematic configuration of a conventional charge / discharge device. As shown in FIG. 10, conventionally, an AC / DC charger 31 for charging and a DC / AC inverter 32 for regenerating electric power are separately provided. For this reason, the equipment cost has been increased, and the miniaturization has been hindered.

[0006] In particular, the conventional AC / DC charger is configured by a PWM control technique using a rectifying bridge and a semiconductor switch.
Although it can be made smaller and less costly than a DC / AC inverter of the same capacity, the input current sine wave charger that takes measures against harmonics of the power supply has the same capacity and cost as an inverter of the same capacity. ing.

However, conventionally, in order to perform charging / discharging, both the DC / AC inverter and the charger had to be provided separately, so that the charging / discharging device could not be miniaturized and the cost was high. Was.

The present invention has been made in view of the above points, and an object of the present invention is to provide a single-wire three-wire AC / DC bidirectional converter that can be reduced in size and can be realized at low cost. .

[0009]

According to a first aspect of the present invention, there is provided a noise filter connected to first to third AC terminals and a part of the noise filter. A single-phase three-wire AC power supply having a capacitor, a chargeable / dischargeable battery, first and second switching elements connected in series between both ends of the battery, and a second switching element connected in series between both ends of the battery. Third and fourth switching elements; a first inductor element connected between a connection point of the first and second switching elements and a terminal of the single-phase three-wire AC power supply; A second inductor element connected between a connection point of the switching element of No. 4 and a terminal of the single-phase three-wire AC power supply;
A first diode connected in parallel to the second switching element, and a second diode connected in parallel to the second switching element.
, A third diode connected in parallel to the third switching element, a fourth diode connected in parallel to the fourth switching element, and a first diode connected between both ends of the battery. A capacitor element, a second capacitor element connected between one end of the battery and a neutral, and a third capacitor connected between the other end of the battery and the neutral.
A capacitor element, a fifth diode connected between one end of the battery and the neutral wire, a sixth diode connected between the other end of the battery and the neutral wire, A connection point between the fifth and sixth diodes and the second and third
A single-wire three-wire AC / DC, comprising: a switch connected between the connection points of the capacitor elements, and a control circuit that controls on / off of the first to fourth switching elements and the switch. In the bidirectional converter, when the battery is charged, the single-phase three-wire AC power supply controls on / off of the second switching element during a positive half cycle; During the negative half cycle of the three-wire AC power supply, the first switching element is turned on and off, and when the battery is discharged to the single-phase three-wire AC power supply by discharging, the first switching element is turned off. And turning on and off the second switching element to supply a positive-phase sine wave voltage between the first and second AC terminals, and on / off controlling the third and fourth switching elements. hand Supplying a sine wave voltage of the phase between the second and third AC terminal.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a single-wire three-wire A according to the present invention will be described.
The C / DC bidirectional converter will be specifically described with reference to the drawings. The present invention uses a single main circuit connected to a single-phase three-wire system (100 V + 100 V, both ends of 200 V in Japan) AC power supply that has become standard in general domestic homes. It operates as a sine-wave (harmonic countermeasure) charger and operates as a single-phase three-wire sine-wave inverter at the time of discharge (regeneration of electric power).

(First Embodiment) FIG. 1 is a circuit diagram of a first embodiment of a single-wire three-wire AC / DC bidirectional converter according to the present invention, and FIG. 2 is a diagram illustrating both a single-wire three-wire AC / DC according to the present invention. It is a conceptual diagram of a direction converter.

As shown in FIG. 2, the single-wire three-wire AC / DC bidirectional converter of the present embodiment is a circuit in which an AC / DC charger for charging and a DC / AC inverter for regenerating electric power are integrated into one. 20 is connected to a single-phase three-wire AC power supply 21.

The single-wire three-wire AC / DC bidirectional converter shown in FIG. 1 has first to third AC terminals TP1, TP2, TP3.
, A single-phase three-wire AC power supply 2 having capacitor elements C1 and C2 constituting a part of the noise filter 1, a chargeable / dischargeable battery 3, and a terminal between both ends of the battery 3. First and second switching elements Q1 and Q2 connected in series, third and fourth switching elements Q3 and Q4 connected in series between both ends of the battery 3,
A first terminal connected between a connection point of the first and second switching elements Q1 and Q2 and a terminal of the single-phase three-wire AC power supply 2
, A second reactor L2 connected between a connection point of the third and fourth switching elements Q3 and Q4 and a terminal of the single-phase three-wire AC power supply 2, and a first switching element Q1. A first diode D1 connected between the source terminal and the drain terminal, a second diode D2 connected between the source terminal and the drain terminal of the second switching element Q2, and a source terminal of the third switching element Q3 And a third diode D3 connected between the drain terminal, a fourth diode D4 connected between the source terminal and the drain terminal of the fourth switching element Q4, and a high-frequency noise connected between both ends of the battery 3. The first capacitor element C3 for absorption and the +
A second capacitor element C4 connected between the other end of the battery 3 and the neutral line NL; a third capacitor element C5 connected between the other end of the battery 3 and the neutral line NL; A fifth diode D5 connected between the other end of the battery 3 and the neutral line NL; a sixth diode D6 connected between the other end of the battery 3 and the neutral line NL; The switch 4 connected between the connection point of the diodes D5 and D6 and the connection point of the second and third capacitor elements C4 and C5, and the turning on of the first to fourth switching elements Q1 to Q4 and the switch 4; A control circuit 5 for controlling turning off;

First to third AC terminals TP1, TP2, T
For example, AC0V, 100V, and 200V are applied to P3, respectively. The first and second reactors L1 and L2 are:
It acts as a boost chopper reactor during charging and acts as a filter for a sine wave inverter during power regeneration (discharge).

First to fourth switching elements Q1 to Q4
And the first to fourth diodes D1 to D4 respectively connected in parallel to these switching elements act as a high power factor rectifier during charging and act as a bridge type inverter 10 during power regeneration.

Fifth and sixth diodes D5 and D6
Is between the input power terminals TP1 and TP2 or TP2 and T
When charging only with the voltage between P3, the diodes D1 to D
It plays the role of passing current instead of 4.

Second and third capacitor elements C4, C
Reference numeral 5 denotes a large-capacity electrolytic capacitor, which is provided to reduce DC output ripple during single load operation without using the battery 3. The switch 4 is turned off during charging and turned on during power regeneration (discharge).

The charging operation of the single-wire / three-wire AC / DC bidirectional converter shown in FIG. 1 includes a case where charging is performed by controlling the first and second switching elements Q1 and Q2 to be turned on / off, and a case where charging is performed. In some cases, charging is performed by turning on / off the four switching elements Q2 and Q4.

In this embodiment, a case will be described in which charging is performed by controlling the first and second switching elements Q1 and Q2 to be on / off. FIG. 3 is a diagram in which a current path at the time of a positive half cycle of TP1 with respect to TP2 is indicated by an arrow.
When the second switching element Q2 is on, the first reactor L1, the second transistor Q2, the fourth diode D4, and the second
A current flows through the reactor L2, and energy is stored in the first and second reactors L1 and L2.

When the second switching element Q2 is off, the first and second reactors L1 and L2 try to pass current in the same direction. A current flows through one reactor L1, the first diode D1, the second and third capacitor elements C4 and C5 and the battery 3, the fourth diode D4, and the second reactor L2.

On the other hand, FIG. 4 is a diagram showing the current path in the negative half cycle by an arrow. First switching element Q1
Is on, as shown by the solid arrow in FIG.
Current flows through the reactor L2, the third diode D3, the first switching element Q1, and the first reactor L1.

When the first switching element Q1 is off, the second reactor L2, the third diode D3, the second and third capacitor elements C4 and C4, as indicated by the dotted arrows in FIG. A current flows through C5 and the battery 3, the second diode D2, and the first reactor L1.

As described above, the current flows in the battery 3 in the same direction in both the positive cycle and the negative cycle, so that the battery 3 can be charged at a high power factor.

FIG. 5 is a block diagram showing an example of the internal configuration of the control circuit 5 shown in FIGS. As shown, the control circuit 5
Are diodes D11 to D16, filters 11 and 12,
IC for boosting power factor correction (PFC-IC) 13, current transformers 14, 15, 16, operational amplifiers OP 1, OP 2, inverters IV 1 to IV 6, clamp circuit 17, charge / discharge changeover switch 18, logic Gates G1 to G13 and drive circuit 19
, A switching power supply controlling PWM-IC 24, a diode bridge 25, an analog multiplier 26, a triangular wave generator 27 for generating a triangular wave, comparators 28 and 29,
And a power module 30 for supplying a power supply voltage to the drive circuits 19 to 23.

The current transformer 14 detects a current flowing through the first reactor L1, and the current transformer 15 detects a current flowing through the second reactor L2. Current transformers 14, 15
Operate every half cycle of the input AC signal.
After the outputs of the current transformers 14 and 15 are amplified by the operational amplifiers OP1 and OP2, the outputs are ORed by the diodes D13 and D14 and applied to the current detection terminal of the PFC-IC13.

The reference input sine wave is a diode D1
5, two-phase half-wave rectification by D16 and PFC via resistor R1
-It is supplied to the multiplier built in the IC13. PFC-IC13
Is controlled so that the input current waveform approaches a sine wave.

At the time of charging, the output contact of the charge / discharge changeover switch 18 is switched to the C side, and the output of the inverter IV6 becomes high level. Therefore, the outputs of the logic gates G1 to G4 are all at the high level. Logic gates G8, G9
Is an inverted signal of the output signal PFC-PWM of the PFC-IC13 / P
It becomes FC-PWM (negative signal of PFC-PWM signal), and the output of logic gates G5 and G6 is the same signal PFC- as the output of PFC-IC13.
It becomes PWM. The outputs of the logic gates G12 and G13 go low.

For this reason, the first and second switching elements Q1 and Q2 are turned on / off according to the output signal PFC-PWM of the PFC-IC 13, and the third and fourth switching elements Q3 and Q4 are always turned off. become. More specifically, during the positive half cycle, as shown in FIG. 3, the battery 3 is charged by turning on / off the second switching element Q2, and during the negative half cycle, as shown in FIG. As described above, the battery 3 is charged by turning on / off the first switching element Q1.

FIGS. 3 and 4 show an example in which charging is performed by controlling the first and second switching elements Q1 and Q2 to be turned on and off, but the second and fourth switching elements Q2 and Q4 are turned on. -Charging may be performed with off control.

On the other hand, FIGS. 6 and 7 are diagrams showing current paths during power regeneration by arrows, FIG. 6 shows a current path in a positive half cycle, and FIG. 7 shows a current path in a negative cycle. ing.

During power regeneration, the switch 4 is always set to the ON state. During a positive cycle, the terminals TP1, TP2
Current flows through the first switching element Q1, the first reactor L1, and the switch 4, as indicated by the dashed-dotted arrow in FIG. Also, terminals TP2, TP3
Current flows through the second reactor L2, the fourth switching element Q4, and the switch 4, as indicated by the two-dot chain arrow in FIG.

On the other hand, during the negative half cycle, the terminals TP1,
As shown by the dashed line arrow in FIG.
A current flows through the switching element Q2, the switch 4, and the first reactor L1. Also, terminals TP2,
As shown by a two-dot chain line arrow in FIG.
A current flows through the reactor L2, the switch 4, and the third switching element Q3.

FIG. 8 is a diagram showing switching timings of the first to fourth switching elements Q1 to Q4 during power regeneration.
At the time of power regeneration, the charge / discharge switch 18 in FIGS. 6 and 7 is switched to the D side. Therefore, the inverter I
The output of V6 is "0", the output of inverter IV2 is "1", and the outputs of logic gates G4, G8, G9 are "1".

The reference sine wave that has passed through the insulating and distortion removing filter 11 is applied to the X terminal of the multiplier 26. Also,
This reference sine wave is rectified and smoothed by the diode bridge 25.

The outputs of the AC current detectors 14 and 15 are supplied to the anode terminals of diodes D11 and D12 via operational amplifiers OP1 and OP2. From the cathode terminals of the diodes D11 and D12, a logical OR signal of the outputs of the AC current detectors 14 and 15 is output.

The PWM-IC 24 outputs a pulse modulation signal for constant voltage / constant current control based on the voltage signal rectified and smoothed by the diode bridge 25 and the current detection signal. This is converted into a direct current by a filter and input to the Y terminal of the multiplier 26. The reference sine wave signal amplitude applied to the multiplier 26 is controlled by the DC voltage at the Y terminal, and outputs a reference sine wave signal having an amplitude suitable for the inverter output, voltage and current during power regeneration.

The comparators 28 and 29 compare the triangular wave signal output from the triangular wave oscillator 27 with the amplitude-controlled reference sine wave signal, and output a pulse signal according to the comparison result as shown in FIG. . Inverters IV4 and IV3 output inverted signals of pulse signals output from comparators 28 and 29, respectively. Outputs of comparators 28 and 29 and inverter I
Outputs of V4 and IV3 are input to logic gates G1 to G4, respectively.

With such control, a pulse voltage as shown in FIG. 8 is supplied from the battery 3 to the L1C1 and L2C2 filters, and further passed through the noise filter to the single-wire three-phase AC terminals TP1 to TP3. A sine wave voltage current as shown in FIG. 8 is regenerated.

The first to fourth switching elements Q1
To actually turn on / off Q4, a dead time adding circuit and a snubber circuit for removing a spike pulse of the main circuit are actually required. However, these circuits are omitted in the above-described embodiment. I have.

As described above, in this embodiment, the AC / DC charger and the DC / AC inverter are integrated into one circuit.
The circuit configuration can be simplified as compared with the related art, and miniaturization, cost reduction, and reduction in power consumption can be achieved. In addition, by controlling on / off of the first to fourth switching elements Q1 to Q4, charging and discharging can be performed with high efficiency and high power factor.

(Second Embodiment) In the first embodiment described above, an example in which charging is performed by controlling the first and second switching elements Q1 and Q2 to be turned on / off has been described. The switching elements Q2 and Q4 may be controlled to be turned on and off to perform charging.

The second embodiment is common to the first embodiment except that the configuration of the control circuit 5 is partially different from that of the first embodiment. Therefore, the following description will focus on the differences.

FIG. 9 shows a single-wire three-wire AC / DC according to the present invention.
It is a circuit diagram of a second embodiment of the bidirectional converter. In the circuit diagram of FIG. 9, the flow of current during a negative cycle during charging is indicated by an arrow. The control circuit 5a in FIG. 9 is different from the control circuit 5a in FIG.
Is characterized in that the logic gate G13 is omitted.

In FIG. 9, the fourth switching element Q
When 4 is on, current flows through second reactor L2, fourth switching element Q4, second diode D2, and first reactor L1.

When the fourth switching element Q4 is off, a current flows through the second reactor L2, the third diode D3, the battery 3, the second diode D2, and the first reactor L1. .

During the positive half cycle, the battery 3 is charged by turning on and off the second switching element Q2 as in FIG. Also, at the time of power regeneration, the battery 3 is discharged by turning on / off the first to fourth switching elements Q1 to Q4, as in FIGS. 6 and 7.

As described above, in the second embodiment, similarly to the first embodiment, the AC / DC charger and the DC / AC inverter are integrated into one circuit for charge / discharge. Lower price and lower power consumption can be achieved.

In each of the above embodiments, the circuit configuration of the control circuits 5 and 5a is not limited to the illustrated one.
The first to fourth switching elements Q
Any specific circuit configuration can be used as long as the circuit can control ON / OFF of Q1 to Q4.

[0049]

As described above in detail, according to the present invention, charging of a battery from a single-phase three-wire AC power supply and regeneration of power to the single-phase three-wire AC power supply by discharging the battery are one. Since it can be realized with one circuit, miniaturization, lower cost, and lower power consumption can be achieved as compared with the related art. Also, by using the present invention, if the battery is charged with cheap electric power at night,
Day and night power leveling can be achieved. Therefore, if the single-phase three-wire charging / discharging device according to the present invention is introduced into a general household,
Electricity cost of each home can be suppressed, and stable supply and effective use of electric power can be achieved.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a first embodiment of a single-wire three-wire AC / DC bidirectional converter according to the present invention.

FIG. 2 is a conceptual diagram of a single-wire three-wire AC / DC bidirectional converter according to the present invention.

FIG. 3 is a diagram showing a current path in a positive half cycle by an arrow.

FIG. 4 is a diagram showing a current path in a negative half cycle by an arrow.

FIG. 5 is a block diagram showing an internal configuration of a control circuit shown in FIGS. 2 to 4;

FIG. 6 is a diagram showing current paths in a positive half cycle during power regeneration by arrows.

FIG. 7 is a diagram showing current paths in a negative half cycle during power regeneration by arrows.

FIG. 8 shows first to fourth switching elements Q during power regeneration.
The figure which shows the switching timing of 1-Q4.

FIG. 9 is a circuit diagram of a second embodiment of a single-wire three-wire AC / DC bidirectional converter according to the present invention.

FIG. 10 is a block diagram showing a schematic configuration of a conventional charge / discharge device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 noise filter 2 single-phase three-wire AC power supply 3 battery 4 switch 5 control circuit Q1 first switching element Q2 second switching element Q3 third switching element Q4 fourth switching element L1 first reactor L2 second Reactor D1 First diode D2 Second diode D3 Third diode D4 Fourth diode D5 Fifth diode D6 Sixth diode C3 First capacitor element C4 Second capacitor element C5 Third capacitor element

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[Procedure amendment]

[Submission date] December 28, 2000 (200.12.
28)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

[Title of the Invention] Single-phase three-wire AC / DC bidirectional converter

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single- phase three-wire AC / DC converter for converting power energy bidirectionally between AC power and DC power with high efficiency and low distortion using a single main circuit.
It relates to a DC bidirectional converter. In particular, it is intended for devices that charge and discharge various batteries with low loss.The most typical example is to store power using nighttime power in order to equalize day-night power, which has recently become a topic, And a technology for regenerating electric power.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

The present invention has been made in view of the above points, and an object of the present invention is to provide a single- phase three-wire AC / DC bidirectional converter that can be reduced in size and can be realized at low cost. is there.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

According to a first aspect of the present invention, there is provided a noise filter connected to first to third AC terminals and a part of the noise filter. A single-phase three-wire AC power supply having a capacitor, a chargeable / dischargeable battery, first and second switching elements connected in series between both ends of the battery, and a second switching element connected in series between both ends of the battery. Third and fourth switching elements; a first inductor element connected between a connection point of the first and second switching elements and a terminal of the single-phase three-wire AC power supply; A second inductor element connected between a connection point of the switching element of No. 4 and a terminal of the single-phase three-wire AC power supply;
A first diode connected in parallel to the second switching element, and a second diode connected in parallel to the second switching element.
, A third diode connected in parallel to the third switching element, a fourth diode connected in parallel to the fourth switching element, and a first diode connected between both ends of the battery. A capacitor element, a second capacitor element connected between one end of the battery and a neutral, and a third capacitor connected between the other end of the battery and the neutral.
A capacitor element, a fifth diode connected between one end of the battery and the neutral wire, a sixth diode connected between the other end of the battery and the neutral wire, A connection point between the fifth and sixth diodes and the second and third
A connecting point of the capacitor element, and a switch connected between the single-phase control circuit, comprising a for controlling the first to fourth on-off the switching element and the switch <br/> In the three-wire AC / DC bidirectional converter, the control circuit controls on / off of the second switching element during the positive half cycle of the single-phase three-wire AC power supply during charging of the battery; In addition, the single-phase three-wire AC power supply controls on / off of the first switching element during a negative half cycle, and regenerates power to the single-phase three-wire AC power supply side by discharging the battery. At times, the first and second switching elements are turned on and off to supply a positive-phase sine wave voltage between the first and second AC terminals, and to control the third and fourth switching elements. ON / OFF control Supplied between the second and third AC terminal a sinusoidal voltage of negative phase Te.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A single- phase three-wire A according to the present invention will be described below.
The C / DC bidirectional converter will be specifically described with reference to the drawings. The present invention uses a single main circuit connected to a single-phase three-wire system (100 V + 100 V, both ends of 200 V in Japan) AC power supply that has become standard in general domestic homes. It operates as a sine-wave (harmonic countermeasure) charger and operates as a single-phase three-wire sine-wave inverter at the time of discharge (regeneration of electric power).

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

(First Embodiment) FIG.
FIG. 2 is a circuit diagram of a first embodiment of a phase three-wire AC / DC bidirectional converter, and FIG. 2 is a conceptual diagram of a single-wire three-wire AC / DC bidirectional converter according to the present invention.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

As shown in FIG. 2, the single- phase three-wire AC / DC bidirectional converter according to the present embodiment integrates an AC / DC charger for charging and a DC / AC inverter for power regeneration. It is characterized in that the circuit 20 is connected to a single-phase three-wire AC power supply 21.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

The single- phase three-wire AC / DC bidirectional converter shown in FIG. 1 has first to third AC terminals TP1, TP2, TP3.
, A single-phase three-wire AC power supply 2 having capacitor elements C1 and C2 constituting a part of the noise filter 1, a chargeable / dischargeable battery 3, and a terminal between both ends of the battery 3. First and second switching elements Q1 and Q2 connected in series, third and fourth switching elements Q3 and Q4 connected in series between both ends of the battery 3,
A first terminal connected between a connection point of the first and second switching elements Q1 and Q2 and a terminal of the single-phase three-wire AC power supply 2
, A second reactor L2 connected between a connection point of the third and fourth switching elements Q3 and Q4 and a terminal of the single-phase three-wire AC power supply 2, and a first switching element Q1. A first diode D1 connected between the source terminal and the drain terminal, a second diode D2 connected between the source terminal and the drain terminal of the second switching element Q2, and a source terminal of the third switching element Q3 And a third diode D3 connected between the drain terminal, a fourth diode D4 connected between the source terminal and the drain terminal of the fourth switching element Q4, and a high-frequency noise connected between both ends of the battery 3. The first capacitor element C3 for absorption and the +
A second capacitor element C4 connected between the other end of the battery 3 and the neutral line NL; a third capacitor element C5 connected between the other end of the battery 3 and the neutral line NL; A fifth diode D5 connected between the other end of the battery 3 and the neutral line NL; a sixth diode D6 connected between the other end of the battery 3 and the neutral line NL; The switch 4 connected between the connection point of the diodes D5 and D6 and the connection point of the second and third capacitor elements C4 and C5, and the turning on of the first to fourth switching elements Q1 to Q4 and the switch 4; A control circuit 5 for controlling turning off;

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

The charging operation of the single- phase three-wire AC / DC bidirectional converter shown in FIG. 1 is performed when the first and second switching elements Q1 and Q2 are ON / OFF-controlled to perform charging. There is a case where charging is performed by controlling the ON / OFF of the fourth switching elements Q2 and Q4.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

By such control, a pulse voltage as shown in FIG. 8 is supplied from the battery 3 to the L1C1 and L2C2 filters, and further passes through a noise filter to a single- phase three- wire AC terminal TP1 to TP3 On the side, a sinusoidal voltage current as shown in FIG. 8 is regenerated.

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction contents]

FIG. 9 shows a single- phase three-wire AC / DC according to the present invention.
It is a circuit diagram of a second embodiment of the bidirectional converter. In the circuit diagram of FIG. 9, the flow of current during a negative cycle during charging is indicated by an arrow. The control circuit 5a in FIG. 9 is different from the control circuit 5a in FIG.
Is characterized in that the logic gate G13 is omitted.

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] Figure 1

[Correction method] Change

[Correction contents]

FIG. 1 is a circuit diagram of a first embodiment of a single- phase three-wire AC / DC bidirectional converter according to the present invention.

[Procedure amendment 14]

[Document name to be amended] Statement

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2 is a conceptual diagram of a single- phase three-wire AC / DC bidirectional converter according to the present invention.

[Procedure amendment 15]

[Document name to be amended] Statement

[Correction target item name] Fig. 9

[Correction method] Change

[Correction contents]

FIG. 9 is a circuit diagram of a second embodiment of the single- phase three-wire AC / DC bidirectional converter according to the present invention.

[Procedure amendment 16]

[Document name to be amended] Drawing

[Correction target item name] Figure 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 17]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

[Procedure amendment 18]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

[Procedure amendment 19]

[Document name to be amended] Drawing

[Correction target item name] Fig. 9

[Correction method] Change

[Correction contents]

FIG. 9

Continued on front page F term (reference) 5G066 AD14 HA30 HB09 JA05 JA07 JB03 5H006 AA01 BB01 BB03 CA01 CA07 CB01 CB04 CB09 CC02 DA03 DB01 DC02 DC05 5H007 AA01 BB00 CA02 CB05 CC01 CC03 CC09 DA04 DB01 DC02 DC05

Claims (5)

[Claims] A single-phase three-wire AC power supply having a noise filter connected to first to third AC terminals, a capacitor constituting a part of the noise filter, a chargeable / dischargeable battery, First and second switching elements connected in series between both ends of a battery; third and fourth switching elements connected in series between both ends of the battery; and connection of the first and second switching elements. A first inductor element connected between a point and a terminal of the single-phase three-wire AC power supply; and a connection point between the third and fourth switching elements and a terminal of the single-phase three-wire AC power supply. A second diode connected in parallel to the first switching element; a second diode connected in parallel to the second switching element; and a third diode connected in parallel to the second switching element. A third diode connected in parallel to the switching element, a fourth diode connected in parallel to the fourth switching element, a first capacitor element connected between both ends of the battery, and one end of the battery A second capacitor element connected between the battery and the neutral wire, a third capacitor element connected between the other end of the battery and the neutral wire, and one end of the battery and the neutral wire A fifth diode connected between the other end of the battery and a neutral wire, a connection point between the fifth and sixth diodes, and a second diode connected between the fifth diode and the neutral diode.
And a connection point between the third capacitor element and a switch, and a control circuit for controlling on / off of the first to fourth switching elements and the switch. In the AC / DC bidirectional converter, when the battery is charged, the single-phase three-wire AC power supply controls on / off of the second switching element during a positive half cycle, and During the negative half cycle, the single-phase three-wire AC power supply controls on / off of the first switching element, and at the time of power regeneration to the single-phase three-wire AC power supply side by discharging the battery, The first and second switching elements are turned on and off to supply a positive-phase sine wave voltage between the first and second AC terminals, and the third and fourth switching elements are turned on and off. Off control to the negative phase of the sine wave voltage and the second and third single-wire three-wire AC / DC bidirectional converter and supplying between AC terminals of the. 2. The control circuit according to claim 1, further comprising: when charging the battery, and when the single-phase three-wire AC power supply turns on the second switching element during a positive half cycle. An inductor element, the second
A current flows through the switching element, the fourth diode, and the second inductor element, and when the battery is charged and the single-phase three-wire AC power supply is in a positive half cycle, the second When the switching element is turned off, the first inductor element, the first
The single-wire three-wire AC / DC bidirectional converter according to claim 1, wherein a current is caused to flow through the diode, the battery, the fourth diode, and the second inductor element. 3. The control circuit according to claim 2, further comprising: when charging the battery, and when the single-phase three-wire AC power supply turns on the first switching element during a negative half cycle. An inductor element, the third
Diode, the first transistor and the first transistor
And when the single-phase three-wire AC power supply turns off the first switching element during the negative half cycle, the second inductor element, the third 2. The single-wire three-wire AC / DC bidirectional converter according to claim 1, wherein a current flows through the diode, the battery, the second diode, and the first inductor element. 3. A single-phase three-wire AC power supply having a noise filter connected to the first to third AC terminals, a capacitor constituting a part of the noise filter, a chargeable / dischargeable battery, First and second switching elements connected in series between both ends of a battery; third and fourth switching elements connected in series between both ends of the battery; and connection of the first and second switching elements. A first inductor element connected between a point and a terminal of the single-phase three-wire AC power supply; and a connection point between the third and fourth switching elements and a terminal of the single-phase three-wire AC power supply. A second diode connected in parallel to the first switching element; a second diode connected in parallel to the second switching element; and a third diode connected in parallel to the second switching element. A third diode connected in parallel to the switching element, a fourth diode connected in parallel to the fourth switching element, a first capacitor element connected between both ends of the battery, and one end of the battery A second capacitor element connected between the battery and the neutral wire, a third capacitor element connected between the other end of the battery and the neutral wire, and one end of the battery and the neutral wire A fifth diode connected between the other end of the battery and a neutral wire, a connection point between the fifth and sixth diodes, and a second diode connected between the fifth diode and the neutral diode.
And a connection point between the third capacitor element and a switch, and a control circuit for controlling on / off of the first to fourth switching elements and the switch. In the AC / DC bidirectional converter, when the battery is charged, the single-phase three-wire AC power supply controls on / off of the second switching element during a positive half cycle, and During the negative half cycle, the single-phase three-wire AC power supply controls on / off of the fourth switching element, and at the time of power regeneration to the single-phase three-wire AC power supply side by discharging the battery, The first and second switching elements are turned on and off to supply a positive-phase sine wave voltage between the first and second AC terminals, and the third and fourth switching elements are turned on and off. Off control to the negative phase of the sine wave voltage and the second and third single-wire three-wire AC / DC bidirectional converter and supplying between AC terminals of the. 5. The control circuit according to claim 2, wherein, when charging the battery, when the single-phase three-wire AC power supply turns on the fourth switching element during a negative half cycle, the second inductor is connected to the second inductor. Element, the fourth switching element,
When a current flows through the second diode and the first inductor element and the single-phase three-wire AC power supply turns off the fourth switching element during a negative half cycle, The second inductor element, the third
The single-wire three-wire AC / DC bidirectional converter according to claim 1, wherein a current is caused to flow through the diode, the battery, the second diode, and the first inductor element.