WO2017056209A1 - 無停電電源装置 - Google Patents
無停電電源装置 Download PDFInfo
- Publication number
- WO2017056209A1 WO2017056209A1 PCT/JP2015/077652 JP2015077652W WO2017056209A1 WO 2017056209 A1 WO2017056209 A1 WO 2017056209A1 JP 2015077652 W JP2015077652 W JP 2015077652W WO 2017056209 A1 WO2017056209 A1 WO 2017056209A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- converter
- bus bar
- power supply
- bus
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
Definitions
- the present invention relates to an uninterruptible power supply, and more particularly to an uninterruptible power supply that converts a DC voltage of a power storage device into an AC voltage and supplies it to a load during a power failure.
- an uninterruptible power supply has a converter, an inverter, and a bidirectional chopper.
- the AC voltage from the AC power source is converted into DC voltage by the converter, and the DC voltage is supplied to the power storage device by the bidirectional chopper and AC voltage is supplied by the inverter.
- the DC voltage of the power storage device is supplied to the inverter via the bidirectional chopper, converted to AC voltage, and supplied to the load.
- Patent Document 1 discloses a power conversion device including a rectifier diode, an inverter, and a regenerative converter.
- the AC voltage supplied from the AC power source is converted into a DC voltage by a rectifier diode, and the DC voltage is converted into an AC voltage by an inverter and supplied to the induction motor.
- the regenerative power generated by the induction motor is converted into a DC voltage by the inverter.
- the DC voltage exceeds the upper limit value, the DC voltage is converted into an AC voltage by the regenerative converter and returned to the AC power source.
- a main object of the present invention is to provide an uninterruptible power supply apparatus capable of simplifying control and reducing the size of the apparatus.
- An uninterruptible power supply includes a first converter that converts an AC voltage supplied from an AC power source into a DC voltage, an inverter that converts the DC voltage into an AC voltage and supplies the load to the load, and a first converter Between the inverter and the inverter, the DC bus for transmitting the DC voltage, the bus bar connected to the DC bus for transmitting the DC voltage, and the bus bar connected to the bus bar. When the voltage exceeds the second voltage, the converter converts the DC voltage received from the bus bar into an AC voltage and returns it to the AC power source. When the AC voltage is supplied from the AC power source and connected to the bus bar, it is received from the bus bar.
- the DC voltage of the power storage device is supplied to the inverter via the bus bar.
- direction chopper in which a circuit board including a bus bar.
- the second converter includes a first semiconductor device
- the bidirectional chopper includes a second semiconductor device and a reactor, and each of the first and second semiconductor devices is mounted on a circuit board and connected to a bus bar. .
- the control can be simplified.
- the bus is connected between the DC bus and the second converter and the bidirectional chopper, a circuit board including the bus bar is provided, and the first semiconductor device of the second converter and the second semiconductor device of the bidirectional chopper Are mounted on a circuit board and connected to a bus bar. Therefore, the first and second semiconductor devices and the bus bar can be configured as an integral unit, and the size of the device can be reduced.
- FIG. 3 It is a circuit block diagram which shows the structure of the uninterruptible power supply by one embodiment of this invention. It is a circuit diagram which shows the structure of the converter and inverter shown in FIG. 3 is a time chart for explaining a control method of the converter shown in FIG. 2. 3 is a time chart for explaining a control method of the inverter shown in FIG. 2. It is a circuit diagram which shows the structure of the regenerative converter shown in FIG. It is a circuit diagram which shows the structure of the bidirectional chopper shown in FIG. It is a figure which shows the structure of the converter unit shown in FIG. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. It is sectional drawing which shows the structure of the laminated bus bar shown in FIG.
- FIG. 11 is a diagram schematically showing a connection relationship among the laminated bus bar, capacitors C1a and C2a, and semiconductor modules M1a and M2a shown in FIGS. 7 to 10;
- FIG. 11 is a diagram schematically showing a connection relationship among the laminated bus bar, capacitors C1e and C2e, and semiconductor modules M1d and M2d shown in FIGS. 7 to 10;
- FIG. 1 is a circuit block diagram showing a configuration of an uninterruptible power supply according to an embodiment of the present invention.
- an uninterruptible power supply includes an input filter 1, a converter 2, a DC positive bus L1, a DC negative bus L2, a DC neutral point bus L3, an inverter 3, an output filter 4, bus bars B1 to B3, smoothing capacitors C1, C2, regenerative converter 5, and bidirectional chopper 6 are provided.
- the bus bars B1 to B3, the smoothing capacitors C1 and C2, the semiconductor module included in the regenerative converter 5 and the semiconductor module included in the bidirectional chopper 6 constitute one converter unit 7.
- illustration of a control device that controls the converter 2, the inverter 3, the regenerative converter 5, and the bidirectional chopper 6 is omitted.
- the input filter 1 includes reactors 11 to 13 and capacitors 14 to 16.
- Reactors 11-13 receive commercial frequency three-phase AC voltages VU, VV, and VW supplied from commercial AC power supply 51, respectively, and the other terminals are connected to the three input terminals of converter 2.
- One electrodes of capacitors 14-16 are connected to one terminals of reactors 11-13, respectively, and the other electrodes thereof are both connected to neutral point NP.
- Reactors 11 to 13 and capacitors 14 to 16 constitute a low-pass filter.
- the input filter 1 allows the three-phase AC power from the commercial AC power source 51 to pass through the converter 2 and prevents the carrier frequency signal generated by the converter 2 from passing to the commercial AC power source 51 side.
- the converter 2 includes input terminals T0a to T0c, output terminals T1 to T3, diodes D1a to D1c, D2a to D2c, and bidirectional switches S1a to S1c.
- Input terminals T0a to T0c receive three-phase AC voltages VU, VV, and VW supplied from commercial AC power supply 51 through input filter 1, respectively.
- the anodes of the diodes D1a to D1c are connected to the input terminals T0a to T0c, respectively, and their cathodes are connected to the output terminal T1.
- the anodes of the diodes D2a to D2c are all connected to the output terminal T2, and their cathodes are connected to the input terminals T0a to T0c, respectively.
- bidirectional switches S1a to S1c are connected to the input terminals T0a to T0c, respectively, and the other terminals are all connected to the output terminal T3.
- Each of bidirectional switches S1a-S1c includes diodes D3-D6 and N-channel MOS transistor Q1.
- Both the anode of the diode D3 and the cathode of the diode D5 are connected to the input terminal T0a (or T0b or T0c). Both the anode of the diode D4 and the cathode of the diode D6 are connected to the output terminal T3.
- the cathodes of the diodes D3 and D4 are connected to each other, and the anodes of the diodes D5 and D6 are connected to each other.
- the drain of transistor Q1 is connected to the cathodes of diodes D3 and D4, and the source of transistor Q1 is connected to the anodes of diodes D5 and D6.
- Input terminal T0a, output terminals T1 to T3, diodes D1a and D2a, and bidirectional switch S1a are U-phase converters that convert U-phase AC voltage VU to DC voltages V1 to V3 and output them to output terminals T1 to T3. It is composed.
- the input terminal T0b, the output terminals T1 to T3, the diodes D1b and D2b, and the bidirectional switch S1b are V-phase converters that convert the V-phase AC voltage VV into DC voltages V1 to V3 and output them to the output terminals T1 to T3. It is composed.
- the input terminal T0c, the output terminals T1 to T3, the diodes D1c and D2c, and the bidirectional switch S1c are W-phase converters that convert the W-phase AC voltage VW into DC voltages V1 to V3 and output them to the output terminals T1 to T3. It is composed.
- Converter 2 converts three-phase AC voltages VU, VV, and VW into DC voltages V1 to V3 and outputs them to output terminals T1 to T3.
- the transistors Q1 of the bidirectional switches S1a to S1c are respectively controlled by PWM (pulse width modulation) signals ⁇ 1a, ⁇ 1b, and ⁇ 1c from a control device (not shown).
- PWM pulse width modulation
- the phases of the PWM signals ⁇ 1a, ⁇ 1b, and ⁇ 1c are synchronized with the phases of the three-phase AC voltages VU, VV, and VW, respectively, and are shifted by 120 degrees.
- 3 (a) to 3 (d) are diagrams showing a method for generating a PWM signal ⁇ 1a and a waveform for the U-phase converter.
- 3A shows waveforms of the sine wave command value signal CM, the positive triangular wave carrier signal CA1, and the negative triangular wave carrier signal CA2, and
- FIGS. 3B to 3D show the PWM signals ⁇ 1A and ⁇ 1B, respectively.
- ⁇ 1a waveforms are shown.
- the frequency of the sine wave command value signal CM is, for example, a commercial frequency.
- the phase of the sine wave command value signal CM is, for example, the same as the phase of the commercial voltage AC voltage VU.
- the periods and phases of carrier signals CA1 and CA2 are the same.
- the cycle of carrier signals CA1 and CA2 is sufficiently smaller than the cycle of sine wave command value signal CM.
- the level of the sine wave command value signal CM and the level of the positive triangular wave carrier signal CA1 are compared.
- PWM signal ⁇ 1B is set to the “L” level.
- the PWM signal ⁇ 1B is set to the “H” level.
- the PWM signal ⁇ 1B is set to the “H” level and the “L” level in synchronization with the carrier signal CA1, and the level of the sine wave command value signal CM is negative. In the period, the PWM signal ⁇ 1B is fixed at the “H” level.
- the level of the sine wave command value signal CM and the level of the negative triangular wave carrier signal CA2 are compared.
- PWM signal ⁇ 1A is set to “H” level.
- PWM signal ⁇ 1A is set to the “L” level.
- the PWM signal ⁇ 1A is fixed at the “H” level.
- the PWM signal ⁇ 1A is set to the “H” level and the “L” level in synchronization with the carrier signal CA2.
- the PWM signal ⁇ 1a is a logical product signal of the PWM signals ⁇ 1A and ⁇ 1B. PWM signal ⁇ 1a is set to “H” level and “L” level in synchronization with carrier signals CA1 and CA2.
- the ratio of the time during which the PWM signal is set to the “H” level within one cycle and the time during one cycle of the PWM signal is called the duty ratio.
- the duty ratio of the PWM signal ⁇ 1a becomes minimum near the positive peak (90 degrees) of the sine wave command value signal CM during the period in which the level of the sine wave command value signal CM is positive, and increases as it deviates from the peak, The maximum is around 0 degree and around 180 degrees.
- the duty ratio of the PWM signal ⁇ 1a becomes minimum near the negative peak (270 degrees) of the sine wave command value signal CM during the period in which the level of the sine wave command value signal CM is negative, and increases as it deviates from the peak. It becomes the maximum around 180 degrees and around 360 degrees.
- the converter 2 converts the three-phase AC power supplied from the commercial AC power source 51 through the input filter 1 into DC power during normal times when the three-phase AC power is normally supplied from the commercial AC power source 51, and Direct current power is supplied to the battery 53 (power storage device) via the bidirectional chopper 6 and supplied to the inverter 3.
- the battery 53 stores DC power.
- a capacitor may be connected instead of the battery 53.
- the converter 2 is controlled by PWM signals ⁇ 1a, ⁇ 1b, and ⁇ 1c supplied from a control device (not shown), and is supplied from the commercial AC power supply 51 via the input filter 1 with three-phase AC voltages VU, VV, DC voltages V1 to V3 are generated based on VW, and the generated DC voltages V1 to V3 are applied to output terminals T1 to T3, respectively.
- DC voltage V1 is higher than DC voltage V2.
- the DC voltage V3 is an intermediate voltage between the DC voltage V1 and the DC voltage V2. If the output terminal T3 is grounded, the DC voltages V1 to V3 become positive voltage, negative voltage, and 0V, respectively.
- the transistor Q1 is fixed to the off state and the operation of the converter 2 is stopped.
- the converter 2 cannot return power from the output terminals T1 to T3 to the input terminals T0a to T0c. For this reason, in this uninterruptible power supply, a regenerative converter 5 that returns power from the output terminals T1 to T3 side to the input terminals T0a to T0c side is separately provided as necessary.
- the control of the converter 2 is simplified compared to the type of converter that can perform both power supply and power regeneration.
- one terminal of DC positive bus L 1, DC negative bus L 2, and DC neutral point bus L 3 is connected to output terminals T 1 to T 3 of converter 2, respectively, and the other terminal is connected to inverter 3. Connected to input terminals T11 to T13.
- the inverter 3 includes input terminals T11 to T13, output terminals T14a to T14c, N-channel MOS transistors Q11a to Q11c, Q12a to Q12c, diodes D11a to D11c, D12a to D12c, and bidirectional switches S2a to S2c.
- the drains of the transistors Q11a to Q11c are all connected to the input terminal T11, and their sources are connected to the output terminals T14a to T14c, respectively.
- the drains of the transistors Q12a to Q12c are connected to the output terminals T14a to T14c, respectively, and their sources are all connected to the input terminal T12.
- Diodes D11a to D11c and D12a to D12c are connected in antiparallel to transistors Q11a to Q11c and Q12a to Q12c, respectively.
- Both terminals of the bidirectional switches S2a to S2c are connected to the input terminal T13, and the other terminals thereof are connected to the output terminals T14a to T14c, respectively.
- Each of bidirectional switches S2a-S2c includes transistors Q13, Q14 and diodes D13, D14.
- Each of the transistors Q13 and Q14 is, for example, an IGBT (Insulated Gate Bipolar Transistor).
- the collectors of the transistors Q13 and Q14 are connected to each other, the emitter of the transistor Q13 is connected to the input terminal T13, and the emitter of the transistor Q14 is connected to the output terminal T14a (or T14b or T14c).
- the diodes D13 and D14 are connected in antiparallel to the transistors Q13 and Q14, respectively.
- Transistors Q11a to Q11c are controlled by PWM signals ⁇ 11a, ⁇ 11b, and ⁇ 11c from a control device (not shown), respectively.
- the phases of the PWM signals ⁇ 11a, ⁇ 11b, and ⁇ 11c are synchronized with the phases of the three-phase AC voltages VU, VV, and VW, respectively, and are shifted by 120 degrees.
- Transistors Q12a to Q12c are controlled by PWM signals ⁇ 12a, ⁇ 12b, and ⁇ 12c from a control device (not shown), respectively.
- the phases of the PWM signals ⁇ 12a, ⁇ 12b, and ⁇ 12c are synchronized with the phases of the three-phase AC voltages VU, VV, and VW, respectively, and are shifted by 120 degrees.
- the transistors Q13 of the bidirectional switches S2a to S2c are respectively controlled by PWM signals ⁇ 13a, ⁇ 13b, and ⁇ 13c from a control device (not shown).
- the PWM signals ⁇ 13a, ⁇ 13b, and ⁇ 13c are complementary signals of the PWM signals ⁇ 11a, ⁇ 11b, and ⁇ 11c, respectively.
- the transistors Q14 of the bidirectional switches S2a to S2c are controlled by PWM signals ⁇ 14a, ⁇ 14b, and ⁇ 14c from a control device (not shown), respectively.
- the PWM signals ⁇ 14a, ⁇ 14b, and ⁇ 14c are complementary signals to the PWM signals ⁇ 12a, ⁇ 12b, and ⁇ 12c, respectively.
- the input terminals T11 to T13, the output terminal T14a, the transistors Q11a and Q12a, the diodes D11a and D12a, and the bidirectional switch S2a convert the DC voltages V1 to V3 into the AC voltage V4a and output them to the output terminal T14a. It constitutes an inverter.
- the input terminals T11 to T13, the output terminal T14b, the transistors Q11b and Q12b, the diodes D11b and D12b, and the bidirectional switch S2b are S-phase inverters that convert the DC voltages V1 to V3 into the AC voltage V4b and output them to the output terminal T14b. It is composed.
- Input terminals T11 to T13, output terminal T14c, transistors Q11c and Q12c, diodes D11c and D12c, and bidirectional switch S2c form a T-phase inverter that converts DC voltages V1 to V3 into AC voltage V4c and outputs it to output terminal T14c. It is composed.
- the AC voltages V4a to V4c change in synchronization with the three-phase AC voltages VU, VV, and VW, and the phases of the AC voltages V4a to V4c are shifted by 120 degrees.
- 4 (a) to 4 (e) are diagrams showing a method of generating PWM signals ⁇ 11a to ⁇ 14a and waveforms for the R-phase inverter.
- 4A shows waveforms of the sine wave command value signal CM, the positive triangular wave carrier signal CA1, and the negative triangular wave carrier signal CA2, and
- FIGS. 4B to 4E show the PWM signals ⁇ 11a and ⁇ 14a, respectively.
- ⁇ 13a, ⁇ 12a are shown.
- the frequency of the sine wave command value signal CM is, for example, a commercial frequency.
- the periods and phases of carrier signals CA1 and CA2 are the same.
- the cycle of carrier signals CA1 and CA2 is sufficiently smaller than the cycle of sine wave command value signal CM.
- the level of the sine wave command value signal CM and the level of the positive triangular wave carrier signal CA1 are compared.
- PWM signals ⁇ 11a and ⁇ 13a are set to the “H” level and the “L” level, respectively.
- PWM signals ⁇ 11a and ⁇ 13a are set to the “L” level and “H” level, respectively.
- the PWM signals ⁇ 11a and ⁇ 13a are alternately set to the “H” level in synchronization with the carrier signal CA1, and the transistors Q11a and Q13 are alternately turned on. Further, during the period in which the level of the sine wave command value signal CM is negative, the PWM signals ⁇ 11a and ⁇ 13a are fixed to the “L” level and the “H” level, respectively, the transistor Q11a is fixed to the off state, and the transistor Q13 is Fixed to the on state.
- the level of the sine wave command value signal CM and the level of the negative triangular wave carrier signal CA2 are compared.
- the PWM signals ⁇ 12a and ⁇ 14a are set to the “L” level and the “H” level, respectively.
- the PWM signals ⁇ 12a and ⁇ 14a are set to the “H” level and the “L” level, respectively.
- the PWM signals ⁇ 12a and ⁇ 14a are fixed to the “L” level and the “H” level, respectively, the transistor Q12a is fixed to the off state, and the transistor Q14 is Fixed to the on state. Further, during a period in which the level of the sine wave command value signal CM is negative, the PWM signals ⁇ 12a and ⁇ 14a are alternately set to the “H” level in synchronization with the carrier signal CA2, and the transistors Q12a and Q14 are alternately turned on.
- the ratio of the time during which the PWM signal is set to the “H” level within one cycle and the time during one cycle of the PWM signal is called the duty ratio.
- the duty ratio of the PWM signal ⁇ 11a becomes maximum near the positive peak (90 degrees) of the sine wave command value signal CM during the period in which the level of the sine wave command value signal CM is positive, and decreases as it deviates from the peak. It is 0 near 0 and 180 degrees.
- the duty ratio of the PWM signal ⁇ 11a is fixed to 0 during a period in which the level of the sine wave command value signal CM is negative.
- the PWM signal ⁇ 13a is a complementary signal of the PWM signal ⁇ 11a.
- the duty ratio of the PWM signal ⁇ 12a is fixed to 0 during a period in which the level of the sine wave command value signal CM is positive.
- the duty ratio of the PWM signal ⁇ 12a becomes maximum near the negative peak (270 degrees) of the sine wave command value signal CM, decreases as it deviates from the peak, and becomes zero near 180 degrees and 360 degrees.
- the duty ratio of the PWM signal ⁇ 12a is fixed to 0 during a period in which the level of the sine wave command value signal CM is positive.
- the PWM signal ⁇ 14a is a complementary signal of the PWM signal ⁇ 12a.
- PWM signals ⁇ 11b to ⁇ 14 for S-phase inverter and PWM signals ⁇ 11c to ⁇ 14 for T-phase inverter are similar to PWM signals ⁇ 11a to ⁇ 14a for R-phase inverter, description thereof will not be repeated.
- the inverter 3 converts the DC power generated by the converter 2 into three-phase AC power during normal times when the three-phase AC power is normally supplied from the commercial AC power source 51, and the AC power from the commercial AC power source 51 is converted. In the event of a power failure when the supply is stopped, the DC power supplied from the battery 53 via the bidirectional chopper 6 is converted into three-phase AC power.
- the inverter 3 generates the three-phase AC voltages V4a to V4c based on the DC voltages V1 to V3 supplied from the converter 2 via the buses L1 to L3 during normal times, and bidirectionally from the battery 53 during a power failure.
- Three-phase AC voltages V4a to V4c are generated based on DC voltages V1 to V3 supplied via chopper 6 and buses L1 to L3.
- the output filter 4 includes reactors 21 to 23 and capacitors 24 to 26.
- Reactors 21 to 23 have one terminals connected to output terminals T14a to T14c of inverter 3, respectively, and the other terminals connected to load 52.
- One electrodes of capacitors 24 to 26 are connected to the other terminals of reactors 21 to 23, respectively, and the other electrodes are both connected to neutral point NP.
- Reactors 21 to 23 and capacitors 24 to 26 constitute a low-pass filter.
- the output filter 4 allows the commercial frequency AC power out of the AC power output from the inverter 3 to pass through the load 52 and prevents the carrier frequency signal generated by the inverter 3 from passing to the load 52 side.
- the output filter 4 converts the output voltages V4a to V4c of the inverter 3 into sine wave three-phase AC voltages VR, VS, VT having a commercial frequency and supplies them to the load 52.
- the load 52 is driven by the three-phase AC voltages VR, VS, and VT.
- Busbars B1 to B3 have one end connected to buses L1 to L3, respectively, and the other end connected to battery 53 via bidirectional chopper 6.
- the smoothing capacitor C1 is connected between the bus bars B1 and B3, and smoothes the DC voltage V1-V3 between the bus bars B1 and B2.
- Smoothing capacitor C2 is connected between bus bars B3 and B2, and smoothes DC voltage V3-V2 between bus bars B3 and B2.
- Bus bars B ⁇ b> 1 and B ⁇ b> 3 are connected to commercial AC power supply 51 via regenerative converter 5.
- the regenerative converter 5 includes input terminals T21 and T22, output terminals T23 and T24, transistors Q21 to Q24, and diodes D21 to D24.
- Each of transistors Q21-Q24 is, for example, an IGBT.
- Input terminals T21 and T22 are connected to bus bars B1 and B2, respectively.
- the output terminal T23 is connected to the V-phase AC voltage VV line of the commercial AC power supply 51, and the output terminal T24 is connected to the W-phase AC voltage VW line of the commercial AC power supply 51.
- the collectors of the transistors Q21 and Q23 are both connected to the input terminal T21, and their emitters are connected to the output terminals T23 and T24, respectively.
- the collectors of transistors Q22 and Q24 are connected to output terminals T23 and T24, respectively, and their emitters are both connected to input terminal T22.
- Diodes D21 to D24 are connected in antiparallel to transistors Q21 to Q24, respectively.
- Each of the gates of the transistors Q21 to Q24 receives a PWM signal from a control device (not shown).
- a control device not shown.
- transistors Q21-Q24 are fixed in the off state.
- the transistors Q21 to Each of Q24 is turned on / off at a predetermined timing, and the DC power of the smoothing capacitors C1 and C2 is converted into AC power and returned to the commercial AC power supply 51.
- the regenerative converter 5 is an inverter that converts the DC voltage V1-V2 into an AC voltage and outputs it to the output terminals T23, T24 when viewed from the input terminals T21, T22 side.
- the transistors Q21 and Q24 are turned on and the transistors Q22 and Q23 are turned off, the path from the input terminal T21 to the input terminal T22 via the transistor Q21, the output terminal T23, the commercial AC power supply 51, the output terminal T24, and the transistor Q24.
- a current flows and a positive voltage is output between the output terminals T23 and T24.
- the transistors Q22 and Q23 are turned on and the transistors Q21 and Q24 are turned off, the path from the input terminal T21 to the input terminal T22 via the transistor Q23, the output terminal T24, the commercial AC power supply 51, the output terminal T23, and the transistor Q22 A current flows and a negative voltage is output between the output terminals T23 and T24. Therefore, by turning on / off the transistors Q21 to Q24 at a predetermined timing, the DC voltage V1-V2 can be converted into an AC voltage and output between the output terminals T23 and T24.
- V phase AC voltage VV and W phase AC voltage VW are 120 degrees out of phase, and the difference between AC voltage VV and VW is also AC voltage VVW.
- the phase of the AC voltage generated by the regenerative converter 5 By causing the phase of the AC voltage generated by the regenerative converter 5 to advance from the AC voltage VVW, power can be returned from the input terminals T21 and T22 to the output terminals T23 and T24, and the DC between the buses L1 and L2 can be returned.
- the voltage V1-V2 can be lowered.
- transistors Q21-Q24 are fixed in the off state, and the return of power to commercial AC power supply 51 is stopped.
- the bidirectional chopper 6 supplies DC power from the capacitors C1 and C2 to the battery 53, and the supply of the three-phase AC power from the commercial AC power source 51 is stopped.
- DC power is supplied from the battery 53 to the capacitors C1 and C2.
- the bidirectional chopper 6 includes terminals T31 to T37, transistors Q31 to Q34, diodes D31 to D34, and a normal mode reactor (DC reactor) 10.
- Each of transistors Q31-Q34 is, for example, an IGBT.
- Terminals T31 to T33 are connected to bus bars B1 to B3, respectively.
- Terminals T36 and T37 are connected to the positive electrode and the negative electrode of battery 53, respectively.
- Transistors Q31 and Q32 have collectors connected to terminals T31 and T34, respectively, and emitters connected to terminals T34 and T33, respectively.
- Transistors Q33 and Q34 have collectors connected to terminals T33 and T35, respectively, and emitters connected to terminals T35 and T32, respectively.
- Diodes D31 to D34 are connected in antiparallel to transistors Q31 to Q34, respectively.
- Normal mode reactor 30 includes a coil 31 connected between terminals T34 and T36, and a coil 32 connected between terminals T37 and T35.
- the transistors Q32 to Q34 are turned off and the transistor Q31 is turned on. Thereby, a current flows from the terminal T31 to the terminal T33 via the transistor Q31, the coil 31, the battery 53, the coil 32, and the diode D33, the capacitor C1 is discharged, and the battery 53 is charged.
- the transistors Q32 and Q33 are turned off and the transistors Q31 and Q34 are turned on.
- current flows from terminal T31 to terminal T32 via transistor Q31, coil 31, battery 53, coil 32, and transistor Q34, capacitors C1 and C2 are discharged, and battery 53 is charged.
- the transistors Q31 to Q33 are turned off and the transistor Q34 is turned on. Thereby, a current flows from the terminal T33 to the terminal T32 via the diode D32, the coil 31, the battery 53, the coil 32, and the transistor Q34, the capacitor C2 is discharged, and the battery 53 is charged.
- the first battery charging mode and the third battery charging mode are performed alternately. During the period between the first battery charge mode and the third battery charge mode, the electromagnetic energy stored in the coils 31 and 32 is released and enters the path of the diode D32, the coil 31, the battery 53, the coil 32, and the diode D33. A current flows and the battery 53 is charged.
- the second battery charging mode is a mode in which the first battery charging mode and the third battery charging mode overlap.
- the transistors Q31, Q33, and Q34 are turned off and the transistor Q32 is turned on.
- a current flows from the positive electrode of the battery 53 to the negative electrode of the battery 53 via the coil 31, the transistor Q32, the capacitor C2, the diode D34, and the coil 32, and the battery 53 is discharged and the capacitor C2 is charged.
- the transistors Q31 to Q34 are turned off. As a result, a current flows from the positive electrode of the battery 53 to the negative electrode of the battery 53 via the coil 31, the diode D31, the capacitors C1 and C2, the diode D34, and the coil 32, and the battery 53 is discharged and the capacitors C1 and C2 are discharged. Charged.
- the transistors Q31, Q32, and Q34 are turned off and the transistor Q33 is turned on. Thereby, a current flows from the positive electrode of the battery 53 to the negative electrode of the battery 53 via the coil 31, the diode D31, the capacitor C1, the transistor Q33, and the coil 32, and the battery 53 is discharged and the capacitor C1 is charged.
- the first battery discharge mode and the third battery discharge mode are performed alternately. In a period between the first battery discharge mode and the third battery discharge mode, when the voltage between the terminals T31 and T32 is lower than the voltage of the battery 53, the second battery discharge mode is performed.
- a control device (not shown) includes three-phase AC voltages VU, VV, VW from a commercial AC power source 51, three-phase AC voltages VR, VS, VT output to a load 52, DC voltages V1 to V3, and a battery 53.
- the converter 2, the inverter 3, the regenerative converter 5, and the bidirectional chopper 6 are controlled by supplying a PWM signal while monitoring the voltage between terminals.
- the operation of this uninterruptible power supply will be described.
- the AC power from the commercial AC power supply 51 is supplied to the converter 2 via the input filter 1, and is converted into DC power by the converter 2. .
- the DC power generated by the converter 2 is stored in the battery 53 via the bidirectional chopper 6 and is supplied to the inverter 3.
- the inverter 3 converts the DC power into three-phase AC power having a commercial frequency.
- the three-phase AC power generated by the inverter 3 is supplied to the load 52 via the output filter 4 and the load 52 is operated.
- the DC voltage V1-V2 between the buses L1, L2 is maintained at the rated voltage VDC, and the voltage between the terminals of the battery 53 is maintained at the constant voltage VB.
- the DC voltage V1-V2 between the buses L1, L2 exceeds the upper limit value VH higher than the rated voltage VDC, and the battery 53 is fully charged, the smoothing capacitors C1, C2 Is converted into AC power by the regenerative converter 5 and returned to the commercial AC power supply 51, and the DC voltage V1-V2 between the buses L1 and L2 is returned to the rated voltage VDC.
- FIG. 7A to 7C are a front view, a plan view, and a side view showing the configuration of the converter unit 7, respectively.
- FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7A to 7C and FIG. 8, the converter unit 7 includes a rectangular support plate 40, two side plates 41 and 42, a rectangular heat sink 43, and ten capacitors C1a to C1e and C2a to C2e. , Eight semiconductor modules M1a to M1d, M2a to M2d, and a rectangular laminated bus bar 44.
- the width of the heat sink 43 (the length in the Y direction (depth direction) in the figure) is about half the width of the support plate 40.
- the lower ends of the side plates 41 and 42 are fixed to the side surface of the support plate 40, and the upper end portions of the side plates 41 and 42 are bent inward.
- the heat radiating plate 43 is fixed to the lower surface of the bent portions of the side plates 41 and 42.
- the support plate 40 and the heat dissipation plate 43 are arranged in parallel.
- Ten capacitors C1a to C1e and C2a to C2e are arranged in five rows and two columns in a region in front of the surface of the support plate 40.
- the capacitors C1a to C1e are arranged in one row in the X direction (left-right direction) in the drawing along one side on the front side of the support plate 40, and are connected in parallel to constitute the smoothing capacitor C1.
- the capacitors C2a to C2e are arranged in a line in the X direction adjacent to the capacitors C1a to C1e, and are connected in parallel to form the smoothing capacitor C2.
- Each of the capacitors C1a to C1e and C2a to C2e is arranged so that the two terminals face up and the two terminals are arranged in the Y direction.
- the heat radiating plate 43 On the surface of the heat radiating plate 43, eight semiconductor modules M1a to M1d and M2a to M2d are arranged in 4 rows and 2 columns. A plurality of heat radiating fins (not shown) are provided on the lower surface of the heat radiating plate 43. Heat generated in the semiconductor modules M1a to M1d and M2a to M2d is dissipated into the air through the heat dissipation plate 43.
- the semiconductor modules M1a to M1d are arranged in a row in the X direction along one side on the back side of the heat sink 43.
- the semiconductor modules M2a to M2d are arranged in a row in the X direction adjacent to the semiconductor modules M1a to M1d.
- Each of the semiconductor modules M1a to M1d, M2a to M2d is arranged so that the three terminals TA, TC, TB are up and the three terminals TA, TC, TB are arranged in the Y direction.
- the semiconductor modules M1a to M1d and the semiconductor modules M2a to M2d are arranged in opposite directions, and the terminals TB of the semiconductor modules M1a to M1d and the terminals TB of the semiconductor modules M2a to M2d are arranged adjacent to each other.
- the laminated bus bar 44 is disposed so as to cover the capacitors C1a to C1e, C2a to C2e and the semiconductor modules M1a to M1d, M2a to M2d.
- Three terminals TP, TO, and TN protrude from the left end portion of the laminated bus bar 44 in the drawing.
- Three terminals TP, TO, and TN are connected to DC positive bus L1, DC neutral point bus L3, and DC negative bus L2, respectively.
- strip-like electrodes EL1 to EL4 extending in the Y direction are provided.
- the electrode EL1 is provided above the terminal TB of the semiconductor modules M1a to M1c
- the electrode EL2 is provided above the terminal TB of the semiconductor modules M2a to M2c.
- the electrode EL3 is provided above the terminal TB of the semiconductor module M1d
- the electrode EL4 is provided above the terminal TB of the semiconductor module M2d.
- FIG. 9 is a cross-sectional view showing the configuration of the laminated bus bar 44.
- a laminated bus bar 44 includes three conductor layers ME1 to ME3 and four insulating films F1 to F4 that are laminated.
- the three conductor layers ME1 to ME3 are provided between the four insulating films F1 to F4 and are electrically insulated from each other.
- the three conductor layers ME1 to ME3 are used as bus bars B1, B3, and B2, respectively, and are connected to terminals TP, TO, and TN, respectively.
- the laminated bus bar 44 holes corresponding to the terminals of the capacitors C1a to C1e, C2a to C2e and the semiconductor modules M1a to M1d and M2a to M2d are formed. Each terminal is electrically connected to the corresponding conductor layer ME or the electrode EL through a corresponding hole by screws, solder, or the like. That is, the capacitors C1a to C1e, C2a to C2e and the semiconductor modules M1a to M1d, M2a to M2d are mounted on the laminate bus bar 44.
- the laminated bus bar 44 By using the laminated bus bar 44, the inductance of each of the bus bars B1 to B3 is reduced, the wiring process is simplified, and the size of the apparatus is reduced.
- FIG. 10 is a circuit diagram showing a configuration of the semiconductor module M1a.
- the semiconductor module M1a includes two transistors QA and QB, two diodes DA and DB, three terminals TA, TB, and TC, and a rectangular parallelepiped package PA.
- Transistors QA and QB and diodes DA and DB are enclosed in a package PA.
- the three terminals TA, TB, and TC are exposed on the surface of the package PA.
- Terminals TA, TB, and TC are arranged at one end, the other end, and the center of the surface of package PA, respectively.
- Each of the transistors QA and QB is, for example, an IGBT.
- the collector and emitter of transistor QA are connected to terminals TA and TB, respectively, and the collector and emitter of transistor QB are connected to terminals TB and TC, respectively.
- Diodes DA and DB are connected in antiparallel to transistors QA and QB, respectively.
- the semiconductor module M1a is also provided with a plurality of terminals for turning on / off each of the transistors QA and QB, but these terminals are not shown for simplicity of the drawings and description. .
- Each of the other semiconductor modules M1b to M1d, M2a to M2d has the same configuration as the semiconductor module M1a.
- the semiconductor modules M1a to M1c are connected in parallel to constitute the transistors Q31 and Q32 and the diodes D31 and D32 of the bidirectional chopper 6 shown in FIG.
- the semiconductor modules M2a to M2c are connected in parallel to constitute the transistors Q33 and Q34 and the diodes D33 and D34 of the bidirectional chopper 6 shown in FIG.
- the semiconductor modules M1d and M2d constitute the transistors Q21 and Q22 and the diodes D21 and D22 of the regenerative converter 5 shown in FIG.
- FIG. 11 is a diagram schematically showing a connection relationship between the laminated bus bar 44, the capacitors C1a and C2a, and the semiconductor modules M1a and M2a.
- each of the conductor layers ME1 to ME3 of the laminated bus bar 44 is indicated by a solid line
- each of the insulating films F1 to F4 is indicated by a dotted line.
- the conductor layers ME1 to ME3 constitute bus bars B1, B3, and B2, respectively, and are connected to terminals TP, TO, and TN, respectively.
- Electrodes EL1 and EL2 are formed on the insulating film F1, and the electrodes EL1 and EL2 are connected to terminals T34 and T35 of FIG.
- Capacitors C1a and C2a and semiconductor modules M1a and M2a are arranged under the insulating film F4.
- the two terminals of the capacitor C1a are connected to the conductor layers ME1 and ME2, respectively.
- Two terminals of each of the capacitors C1b to C1e are also connected in the same manner as the capacitor C1a.
- Two terminals of the capacitor C2a are connected to the conductor layers ME2 and ME3, respectively.
- Two terminals of each of the capacitors C2b to C2e are also connected in the same manner as the capacitor C2a.
- Each terminal of the capacitor C is connected to the corresponding conductor layer ME through the hole of the laminated bus bar 44.
- the terminals TA, TC, TB of the semiconductor module M1a are connected to the conductor layers ME1, ME2 and the electrode EL1, respectively.
- the respective terminals TA, TC, TB of the semiconductor modules M1b, M1c are also connected in the same manner as the semiconductor module M1a.
- Terminals TA, TC, and TB of semiconductor module M2a are connected to conductor layers ME2 and ME3 and electrode EL2, respectively.
- the respective terminals TA, TC, TB of the semiconductor modules M2b, M2c are also connected in the same manner as the semiconductor module M1a.
- Each terminal T of the semiconductor module M is connected to a corresponding conductor layer ME or electrode EL through a hole in the laminated bus bar 44.
- the semiconductor modules M1a to M1c and M2a to M2c constitute a second semiconductor device included in the bidirectional chopper 6.
- FIG. 12 is a diagram schematically showing a connection relationship among the laminated bus bar 44, the capacitors C1e and C2e, and the semiconductor modules M1d and M2d.
- each of the conductor layers ME1 to ME3 of the laminated bus bar 44 is indicated by a solid line
- each of the insulating films F1 to F4 is indicated by a dotted line.
- the conductor layers ME1 to ME3 constitute bus bars B1, B3, and B2, respectively, and are connected to terminals TP, TO, and TN, respectively.
- Electrodes EL3 and EL4 are formed on the insulating film F1, and the electrodes EL3 and EL4 are connected to terminals T23 and T24 in FIG.
- Capacitors C1e and C2e and semiconductor modules M1d and M2d are arranged under the insulating film F4. As described above, the two terminals of the capacitor C1e are connected in the same manner as the capacitor C1a. As described above, the two terminals of the capacitor C1e are connected in the same manner as the capacitor C2a.
- the terminals TA, TC, TB of the semiconductor module M1d are connected to the conductor layers ME1, ME3 and the electrode EL3, respectively.
- Terminals TA, TC, TB of semiconductor module M2d are connected to conductor layers ME1, ME3 and electrode EL4, respectively.
- Each terminal T of the semiconductor module M is connected to a corresponding conductor layer ME or electrode EL through a hole in the laminated bus bar 44.
- the semiconductor modules M1d and M2d constitute a first semiconductor device included in the regenerative converter 5.
- bus bars B1 to B3 are connected between buses L1 to L3 and regenerative converter 5 and bidirectional chopper 6, and bus bars B1 to B3 are constituted by laminated bus bars 44, and are included in regenerative converter 5 and bidirectional chopper 6.
- Each of the semiconductor modules M1a to M1d and M2a to M2d was mounted on the laminated bus bar 44, and each terminal was connected to the bus bar B1, B2 or B3. Therefore, the semiconductor modules M1a to M1d, M2a to M2d and the bus bars B1 to B3 can be configured as an integrated unit, and the size of the apparatus can be reduced.
- the present invention is not limited to this, and the present invention is limited to two.
- the present invention can also be applied to a two-level uninterruptible power supply device having only the buses L1 and L2.
- a converter that converts the AC voltage from the commercial AC power source 51 into DC voltages V1 and V2, an inverter that converts the DC voltages V1 and V2 into AC voltages and supplies them to the load 52, DC Two bus bars B1 and B2 for transmitting the voltages V1 and V2, a smoothing capacitor connected between the bus bars B1 and B2, and a DC voltage between the bus bars B1 and B2 are converted into an AC voltage and returned to the commercial AC power supply 51.
- a regenerative converter and a bidirectional chopper for transferring DC power between bus bars B1 and B2 and battery 53 are provided.
- the bus bars B1 and B2 are constituted by laminated bus bars.
- a semiconductor module included in the regenerative chopper, a semiconductor module included in the bidirectional chopper, and a smoothing capacitor are mounted on the laminated bus bar.
Abstract
Description
Claims (8)
- 交流電源から供給される交流電圧を直流電圧に変換する第1のコンバータと、
直流電圧を交流電圧に変換して負荷に供給するインバータと、
前記第1のコンバータと前記インバータとの間に接続され、直流電圧を伝達するための直流母線と、
前記直流母線に接続され、直流電圧を伝達するためのブスバーと、
前記ブスバーに接続され、前記直流母線の直流電圧が上限値を超えた場合に、前記ブスバーから受けた直流電圧を交流電圧に変換して前記交流電源に戻す第2のコンバータと、
前記ブスバーに接続され、前記交流電源から交流電圧が供給されている通常時は、前記ブスバーから受けた直流電圧を電力貯蔵装置に供給し、前記交流電源からの交流電圧の供給が停止された停電時は、前記電力貯蔵装置の直流電圧を前記ブスバーを介して前記インバータに供給する双方向チョッパと、
前記ブスバーを含む回路基板とを備え、
前記第2のコンバータは第1の半導体装置を含み、
前記双方向チョッパは第2の半導体装置およびリアクトルを含み、
前記第1および第2の半導体装置の各々は前記回路基板に搭載されて前記ブスバーに接続されている、無停電電源装置。 - さらに、前記回路基板に搭載され、前記第1の半導体装置に接続されるとともに前記交流電源に接続される第1の電極と、
前記回路基板に搭載され、前記第2の半導体装置に接続されるとともに前記リアクトルを介して前記電力貯蔵装置に接続される第2の電極とを備える、請求項1に記載の無停電電源装置。 - さらに、前記回路基板に搭載され、前記ブスバーに接続された平滑コンデンサを備える、請求項1に記載の無停電電源装置。
- 前記回路基板はラミネートブスバーを含み、
前記ラミネートブスバーは互いに絶縁された複数の導体層を含み、
前記複数の導体層は前記ブスバーを構成している、請求項1に記載の無停電電源装置。 - 交流電源から供給される交流電圧を第1~第3の直流電圧に変換する第1のコンバータと、
第1~第3の直流電圧を交流電圧に変換して負荷に供給するインバータと、
前記第1のコンバータと前記インバータとの間に接続され、それぞれ第1~第3の直流電圧を伝達するための第1~第3の直流母線とを備え、
前記第1の直流電圧は前記第2の直流電圧よりも高く、前記第3の直流電圧は前記第1および第2の直流電圧の中間電圧であり、
さらに、それぞれ前記第1~第3の直流母線に接続され、それぞれ第1~第3の直流電圧を伝達するための第1~第3のブスバーと、
前記第1および第2のブスバーに接続され、前記第1および第2の直流母線間の直流電圧が上限値を超えた場合に、前記第1および第2のブスバー間の直流電圧を交流電圧に変換して前記交流電源に戻す第2のコンバータと、
前記第1~第3のブスバーに接続され、前記交流電源から交流電圧が供給されている通常時は、前記第1~第3のブスバーから受けた第1~第3の直流電圧を第4の直流電圧に変換して電力貯蔵装置に供給し、前記交流電源からの交流電圧の供給が停止された停電時は、前記電力貯蔵装置の第4の直流電圧を第1~第3の直流電圧に変換し、前記第1~第3のブスバーを介して前記インバータに供給する双方向チョッパと、
前記第1~第3のブスバーを含む回路基板とを備え、
前記第2のコンバータは第1の半導体装置を含み、
前記双方向チョッパは第2の半導体装置およびリアクトルを含み、
前記第1の半導体装置は前記回路基板に搭載されて前記第1および第2のブスバーに接続され、
前記第2の半導体装置は前記回路基板に搭載されて前記第1~第3のブスバーに接続されている、無停電電源装置。 - さらに、前記回路基板に搭載され、前記第1の半導体装置に接続されるとともに前記交流電源に接続される第1および第2の電極と、
前記回路基板に搭載され、前記第2の半導体装置に接続されるとともに前記リアクトルを介して前記電力貯蔵装置に接続される第3および第4の電極とを備える、請求項5に記載の無停電電源装置。 - さらに、前記回路基板に搭載され、前記第1および第3のブスバー間に接続された第1の平滑コンデンサと、
前記回路基板に搭載され、前記第3および第2のブスバー間に接続された第2の平滑コンデンサとを備える、請求項5に記載の無停電電源装置。 - 前記回路基板はラミネートブスバーを含み、
前記ラミネートブスバーは互いに絶縁された第1~第3の導体層を含み、
前記第1~第3の導体層はそれぞれ前記第1~第3のブスバーを構成している、請求項5に記載の無停電電源装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020187010941A KR102061988B1 (ko) | 2015-09-30 | 2015-09-30 | 무정전 전원 장치 |
US15/758,557 US11205919B2 (en) | 2015-09-30 | 2015-09-30 | Uninterruptible power supply system |
PCT/JP2015/077652 WO2017056209A1 (ja) | 2015-09-30 | 2015-09-30 | 無停電電源装置 |
JP2017542570A JP6450019B2 (ja) | 2015-09-30 | 2015-09-30 | 無停電電源装置 |
CN201580083482.4A CN108141140B (zh) | 2015-09-30 | 2015-09-30 | 不间断电源装置 |
CA2998832A CA2998832C (en) | 2015-09-30 | 2015-09-30 | Uninterruptible power supply system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2015/077652 WO2017056209A1 (ja) | 2015-09-30 | 2015-09-30 | 無停電電源装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017056209A1 true WO2017056209A1 (ja) | 2017-04-06 |
Family
ID=58422920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/077652 WO2017056209A1 (ja) | 2015-09-30 | 2015-09-30 | 無停電電源装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US11205919B2 (ja) |
JP (1) | JP6450019B2 (ja) |
KR (1) | KR102061988B1 (ja) |
CN (1) | CN108141140B (ja) |
CA (1) | CA2998832C (ja) |
WO (1) | WO2017056209A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019033587A (ja) * | 2017-08-08 | 2019-02-28 | 株式会社日立製作所 | 電力変換装置および電力変換装置を搭載した車両 |
US11196352B2 (en) | 2017-10-25 | 2021-12-07 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power conversion device |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109075599B (zh) * | 2016-04-14 | 2021-12-07 | 东芝三菱电机产业系统株式会社 | 不间断电源装置 |
WO2018142579A1 (ja) * | 2017-02-03 | 2018-08-09 | 東芝三菱電機産業システム株式会社 | 無停電電源装置 |
WO2019193739A1 (ja) * | 2018-04-06 | 2019-10-10 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
JP7081292B2 (ja) * | 2018-05-09 | 2022-06-07 | 富士電機株式会社 | 電力変換装置 |
CN109660014A (zh) * | 2019-01-10 | 2019-04-19 | 广东志成冠军集团有限公司 | 一种一体化储能型兆瓦级不间断电源系统 |
CN110697057B (zh) * | 2019-10-11 | 2023-02-28 | 中国直升机设计研究所 | 一种无人直升机电源系统 |
EP3826166A1 (en) * | 2019-11-25 | 2021-05-26 | Carrier Corporation | Power module and converter with asymmetrical semiconductor rating arrangement |
WO2021186538A1 (ja) * | 2020-03-17 | 2021-09-23 | 東芝三菱電機産業システム株式会社 | ラミネートブスバー、電力変換器、電力変換装置および無停電電源装置 |
KR102500296B1 (ko) * | 2020-12-31 | 2023-02-15 | 영남대학교 산학협력단 | 직류 버스의 전력 진동을 감쇠하는 전압 전원 컨버터 시스템 |
CN115733233A (zh) * | 2021-08-25 | 2023-03-03 | 台达电子工业股份有限公司 | 电能转换系统 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04305172A (ja) * | 1991-04-02 | 1992-10-28 | Mitsubishi Electric Corp | 平滑コンデンサの寿命判定回路 |
JPH08182345A (ja) * | 1994-12-26 | 1996-07-12 | Fuji Electric Co Ltd | インバータ |
JP2012075274A (ja) * | 2010-09-29 | 2012-04-12 | Sanken Electric Co Ltd | 無停電電源装置 |
JP2015005573A (ja) * | 2013-06-19 | 2015-01-08 | 富士電機株式会社 | 絶縁ブスバー及びその製造方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0866056A (ja) * | 1994-08-24 | 1996-03-08 | Mitsubishi Electric Corp | インバータ装置 |
JP5463289B2 (ja) * | 2008-08-22 | 2014-04-09 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
KR20130099022A (ko) * | 2010-10-01 | 2013-09-05 | 삼성에스디아이 주식회사 | 에너지 저장 시스템용 전력 변환 시스템 및 이의 제어방법 |
JP5457332B2 (ja) * | 2010-12-03 | 2014-04-02 | 三菱重工パーキング株式会社 | 電源装置、機械式駐車装置、及び電源装置の制御方法 |
JP5720384B2 (ja) * | 2011-04-07 | 2015-05-20 | 富士電機株式会社 | 電気車駆動回路 |
JP5260718B2 (ja) * | 2011-11-08 | 2013-08-14 | ファナック株式会社 | 産業用ロボットの可動部の回転軸に接続されたサーボモータを駆動するサーボモータ駆動装置 |
JP5930934B2 (ja) | 2012-10-01 | 2016-06-08 | 株式会社日立産機システム | 電力変換装置 |
CN105794096B (zh) * | 2013-11-20 | 2018-08-28 | 日产自动车株式会社 | 电力变换装置 |
JP6352740B2 (ja) * | 2014-09-11 | 2018-07-04 | 株式会社ケーヒン | 電力変換装置 |
WO2016111260A1 (ja) * | 2015-01-05 | 2016-07-14 | 三菱電機株式会社 | 電力変換装置 |
US9876438B2 (en) * | 2015-03-19 | 2018-01-23 | Mitsubishi Electric Corporation | Converter unit system having inrush-current suppression circuit |
-
2015
- 2015-09-30 CA CA2998832A patent/CA2998832C/en active Active
- 2015-09-30 CN CN201580083482.4A patent/CN108141140B/zh active Active
- 2015-09-30 KR KR1020187010941A patent/KR102061988B1/ko active IP Right Grant
- 2015-09-30 US US15/758,557 patent/US11205919B2/en active Active
- 2015-09-30 WO PCT/JP2015/077652 patent/WO2017056209A1/ja active Application Filing
- 2015-09-30 JP JP2017542570A patent/JP6450019B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04305172A (ja) * | 1991-04-02 | 1992-10-28 | Mitsubishi Electric Corp | 平滑コンデンサの寿命判定回路 |
JPH08182345A (ja) * | 1994-12-26 | 1996-07-12 | Fuji Electric Co Ltd | インバータ |
JP2012075274A (ja) * | 2010-09-29 | 2012-04-12 | Sanken Electric Co Ltd | 無停電電源装置 |
JP2015005573A (ja) * | 2013-06-19 | 2015-01-08 | 富士電機株式会社 | 絶縁ブスバー及びその製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019033587A (ja) * | 2017-08-08 | 2019-02-28 | 株式会社日立製作所 | 電力変換装置および電力変換装置を搭載した車両 |
US11196352B2 (en) | 2017-10-25 | 2021-12-07 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power conversion device |
Also Published As
Publication number | Publication date |
---|---|
JP6450019B2 (ja) | 2019-01-09 |
US20180262045A1 (en) | 2018-09-13 |
US11205919B2 (en) | 2021-12-21 |
CA2998832A1 (en) | 2017-04-06 |
KR102061988B1 (ko) | 2020-01-02 |
CN108141140B (zh) | 2020-10-30 |
CN108141140A (zh) | 2018-06-08 |
KR20180052759A (ko) | 2018-05-18 |
JPWO2017056209A1 (ja) | 2018-06-14 |
CA2998832C (en) | 2023-01-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6450019B2 (ja) | 無停電電源装置 | |
EP3657661B1 (en) | Conversion circuit, control method, and power supply device | |
US10790743B2 (en) | Individual module, electrical converter system, and battery system | |
US8890465B2 (en) | Circuit arrangement for modular drive power converters | |
US9083230B2 (en) | Multilevel voltage source converters and systems | |
JP5369922B2 (ja) | 3レベル電力変換装置 | |
WO2013105156A1 (ja) | マルチレベル電力変換回路 | |
WO2015056571A1 (ja) | 電力変換装置及び電力変換方法 | |
US9106074B2 (en) | Multilevel power converter | |
US8248828B2 (en) | Medium voltage inverter system | |
Grandi et al. | Fault-tolerant control strategies for quad inverter induction motor drives with one failed inverter | |
JP5362657B2 (ja) | 電力変換装置 | |
JP6378828B2 (ja) | コンバータおよびそれを用いた電力変換装置 | |
CN109075719B (zh) | 转换器以及使用该转换器的电力转换装置 | |
EP3694096A1 (en) | Three-level pulse width modulation technique for reducing semiconductor short circuit conduction loss | |
WO2019244418A1 (ja) | 3相モータ駆動装置 | |
Lei et al. | Extreme high power density T-modular-multilevel-converter for medium voltage motor drive | |
WO2018127945A1 (ja) | 電力変換装置 | |
WO2019049301A1 (ja) | コンバータおよびそれを用いた無停電電源装置 | |
JP2004312902A (ja) | 3レベル電力変換装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15905363 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2017542570 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15758557 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2998832 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20187010941 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15905363 Country of ref document: EP Kind code of ref document: A1 |