WO2016098178A1 - 電力変換器 - Google Patents
電力変換器 Download PDFInfo
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- WO2016098178A1 WO2016098178A1 PCT/JP2014/083242 JP2014083242W WO2016098178A1 WO 2016098178 A1 WO2016098178 A1 WO 2016098178A1 JP 2014083242 W JP2014083242 W JP 2014083242W WO 2016098178 A1 WO2016098178 A1 WO 2016098178A1
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- converter
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- inverter
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
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- 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
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- 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
- H02M7/5387—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 in a bridge configuration
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/0074—Plural converter units whose inputs are connected in series
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
-
- 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 a power converter, for example, a power converter in a railway vehicle that receives a plurality of AC power from a plurality of AC power overhead lines.
- Patent Document 1 describes a technique related to a converter system used in a railway vehicle drive system. This converter system has a plurality of partial converter systems as a power source for a motor that is a load system. In this converter system, an alternating voltage is supplied to the series circuit of the partial converter system.
- a typical object of the present invention is to provide a power converter capable of improving reliability in, for example, a railway vehicle that receives a plurality of AC power from a plurality of AC power overhead lines.
- the power converter includes a first converter, a first inverter, a transformer, a second converter, and a second inverter.
- the first converter converts a first AC power among a plurality of AC powers into a first DC power.
- the first inverter converts the first DC power into second AC power.
- the transformer converts the second AC power into third AC power.
- the second converter converts the third AC power into second DC power.
- the second inverter converts the second DC power into fourth AC power.
- the first converter, the first inverter, and the second converter are composed of unipolar elements, and the second inverter is composed of a bipolar element.
- the power converter includes a first converter, a first inverter, a transformer, and a second converter.
- the first converter converts a first AC power among a plurality of AC powers into a first DC power.
- the first inverter converts the first DC power into second AC power.
- the transformer converts the second AC power into third AC power.
- the second converter converts the third AC power into second DC power.
- the first converter, the first inverter, the transformer, and the second converter constitute one converter group. The breakdown voltage when a plurality of the converter groups are connected in series is higher than the highest voltage among the plurality of AC powers.
- the power converter includes a first converter, a first inverter, a transformer, a second converter, a voltage detector, and a control circuit.
- the first converter converts a first AC power of the plurality of AC powers into a first DC power in a railway vehicle that receives a plurality of AC powers from a plurality of AC power overhead lines.
- the first inverter converts the first DC power into second AC power.
- the transformer converts the second AC power into third AC power.
- the second converter converts the third AC power into second DC power.
- the voltage detector detects voltages of the plurality of AC powers input to the railway vehicle.
- the control circuit controls the first converter, the first inverter, and the second converter based on the voltage detected by the voltage detector.
- the first converter, the first inverter, the transformer, the second converter, the voltage detector, and the control circuit constitute one converter group.
- the power converter includes the plurality of converter groups connected in series and a plurality of short-circuits that short-circuit each of the plurality of converter groups.
- the plurality of AC powers include a first voltage AC power and a second voltage AC power lower than the first voltage.
- the power converter performs a power conversion operation using a part of the plurality of converter groups.
- a power converter that can improve reliability can be provided.
- FIG. 2 is a circuit diagram showing an example of a configuration of a converter group and a short circuit constituting a power converter in the railway vehicle of FIG. 1.
- (A) (b) (c) is explanatory drawing which shows an example of operation
- (A) (b) is explanatory drawing which shows an example of the external appearance of the module which accommodates the converter group corresponding to the operation
- FIG. 3 is a cross-sectional view showing an example of the structure of a semiconductor switch element (SiC-MOS) used in the power converter of FIG. 2. It is sectional drawing which shows an example of the structure of the semiconductor switch element (SiC-IGBT) utilized for the power converter of FIG. (A) and (b) are the top views and sectional drawings which show an example of the structure of the semiconductor diode element (SiC-SBD) utilized for the power converter of FIG. (A) and (b) are the top views and sectional drawings which show an example of the structure of the semiconductor diode element (SiC-PND) utilized for the power converter of FIG.
- FIG. 2 is a circuit diagram illustrating an example of a configuration of a converter group and a final stage inverter that constitute a power converter in the railway vehicle of FIG. 1.
- the constituent elements are not necessarily indispensable unless otherwise specified and apparently essential in principle. Needless to say.
- the shapes, positional relationships, etc. of the components, etc. when referring to the shapes, positional relationships, etc. of the components, etc., the shapes are substantially the same unless otherwise specified, or otherwise apparent in principle. And the like are included. The same applies to the above numerical values and ranges. [Outline of the embodiment]
- the power converter includes a first converter (13), a first inverter (14), a transformer (15), a second converter (16), and a second inverter (21).
- the first converter converts a first AC power among a plurality of AC powers into a first DC power.
- the first inverter converts the first DC power into second AC power.
- the transformer converts the second AC power into third AC power.
- the second converter converts the third AC power into second DC power.
- the second inverter converts the second DC power into fourth AC power.
- the first converter, the first inverter, and the second converter are composed of unipolar elements, and the second inverter is composed of a bipolar element.
- the power converter includes a first converter (13), a first inverter (14), a transformer (15), and a second converter (16).
- the first converter converts a first AC power among a plurality of AC powers into a first DC power.
- the first inverter converts the first DC power into second AC power.
- the transformer converts the second AC power into third AC power.
- the second converter converts the third AC power into second DC power.
- the first converter, the first inverter, the transformer, and the second converter constitute one converter group (10). The breakdown voltage when a plurality of the converter groups are connected in series is higher than the highest voltage among the plurality of AC powers.
- the power converter includes a first converter (13), a first inverter (14), a transformer (15), a second converter (16), a voltage detector (11), a control circuit ( 12).
- the first converter converts a first AC power of the plurality of AC powers into a first DC power in a railway vehicle that receives a plurality of AC powers from a plurality of AC power overhead lines.
- the first inverter converts the first DC power into second AC power.
- the transformer converts the second AC power into third AC power.
- the second converter converts the third AC power into second DC power.
- the voltage detector detects voltages of the plurality of AC powers input to the railway vehicle.
- the control circuit controls the first converter, the first inverter, and the second converter based on the voltage detected by the voltage detector.
- the first converter, the first inverter, the transformer, the second converter, the voltage detector, and the control circuit constitute one converter group (10).
- the power converter includes a plurality of converter groups connected in series and a plurality of short-circuit circuits (40) that short-circuit each of the plurality of converter groups.
- the plurality of AC powers include a first voltage AC power and a second voltage AC power lower than the first voltage.
- the power converter performs a power conversion operation using a part of the plurality of converter groups.
- FIG. 1 is a block diagram showing an example of the configuration of a railway vehicle using this power converter.
- FIG. 1 shows a power converter including a multi-series converter circuit of a railway vehicle for an AC / DC overhead line.
- the power converter 1 is used for a railway vehicle that receives a plurality of AC powers from a plurality of AC power overhead lines 2.
- a plurality of AC powers from a plurality of AC power overhead lines 2 for example, a single phase (1 ⁇ ), AC 15 kV, AC 25 kV will be described.
- the input of several DC power from the several DC power overhead line 3 is also possible, and the example of DC3kV and DC1.5kV is demonstrated here, for example.
- the power converter 1 includes a voltage detector (VDT) 11, a control circuit (CTL) 12, a first converter (AC / DC) 13, a first inverter (DC / AC) 14, a transformer (MFT) 15, and A plurality of converter groups 10 each including a second converter (AC / DC) 16 are included.
- VDT voltage detector
- CTL control circuit
- AC / DC first converter
- DC / AC first inverter
- MFT transformer
- AC power is supplied to a plurality of converter groups 10 from a plurality of AC power overhead lines 2 through a pantograph 4 that is a current collector of a railway vehicle. Further, DC power is also supplied from a plurality of DC power overhead lines 3 through a pantograph 4 which is a current collector for a railway vehicle.
- a changeover switch 5 is connected between the pantograph 4 and the plurality of converter groups 10.
- the changeover switch 5 has a common terminal COM connected to the pantograph 4, an AC power terminal AC connected to an input node of the first stage converter group of the plurality of converter groups 10, and a DC power terminal DC
- the plurality of converter groups 10 are connected to the shorted output node.
- the changeover switch 5 when supplying AC power from the AC power overhead line 2, the changeover switch 5 is switched to the AC power terminal AC, and when supplying DC power from the DC power overhead line 3, the changeover switch 5 is It is switched to the DC power terminal DC side.
- the changeover switch 5 is changed over according to an instruction from, for example, a railway vehicle driver.
- the voltage detector 11 is a voltage detector that detects a plurality of AC power voltages (AC 15 kV, AC 25 kV) input to the railway vehicle.
- the control circuit 12 is a control circuit that controls the first converter 13, the first inverter 14, and the second converter 16 that constitute the converter group 10 based on the voltage detected by the voltage detector 11.
- the control circuit 12 also controls a short circuit 40 (described later) connected to each converter group 10.
- the first converter 13 is a converter that converts the first AC power among the plurality of AC powers from the plurality of AC power overhead lines 2 to the first DC power.
- the first inverter 14 is an inverter that converts the first DC power converted by the first converter 13 into second AC power.
- the transformer 15 is a transformer that converts the second AC power converted by the first inverter 14 into third AC power.
- the second converter 16 is a converter that converts the third AC power converted by the transformer 15 into second DC power.
- the plurality of converter groups 10 are connected in series. A plurality of AC powers from a plurality of AC power overhead lines 2 are supplied to a first converter group of the plurality of converter groups 10 from a pantograph 4 that is a current collector of a railway vehicle via a changeover switch 5. The Moreover, the last converter group of the plurality of converter groups 10 is connected to the ground potential from the wheel 6 of the railway vehicle through the rail.
- the output nodes of the plurality of converter groups 10 are short-circuited, and the short-circuited nodes are connected to the input side of the second inverter (DC / AC) 21 for driving the motor.
- the second inverter 21 is an inverter that converts second DC power from a short-circuited node of the plurality of converter groups 10 into fourth AC power.
- a motor (M3) 7 for driving the railway vehicle is connected to the output side of the second inverter 21.
- the motor 7 is driven by AC power output from the second inverter 21.
- the motor 7 shows an example of a three-phase motor driven by, for example, three-phase (3 ⁇ ) AC power.
- the short-circuited nodes of the plurality of converter groups 10 are also connected to the input side of the power supply inverter group.
- the power supply inverter group includes a third inverter (DC / AC) 31, a transformer 32, a third converter (AC / DC) 33, and a fourth inverter (DC / AC) 34.
- the third inverter 31 is an inverter that converts the second DC power from the short-circuited node of the plurality of converter groups 10 into the fifth AC power.
- the transformer 32 is a transformer that converts the fifth AC power converted by the third inverter 31 into the sixth AC power.
- the third converter 33 is a converter that converts the sixth AC power converted by the transformer 32 into the fourth DC power.
- the fourth inverter 34 is an inverter that converts the fourth DC power converted by the third converter 33 into seventh AC power.
- the load device 8 is connected to the output side of the fourth inverter 34.
- the load device 8 is, for example, an air conditioner, an air conditioner, or other devices installed in a railway vehicle.
- an example is shown in which the load device 8 is driven by, for example, AC 440V.
- FIG. 2 is a circuit diagram showing an example of a configuration of a converter group and a short circuit constituting the power converter.
- the converter group and short circuit which comprise a multi-serial converter are shown.
- the power converter includes a plurality of converter groups 10 and a plurality of short circuits 40 that short-circuit each of the plurality of converter groups 10.
- Each of the plurality of converter groups 10 includes the first converter 13, the first inverter 14, the transformer 15, and the second converter 16 illustrated in FIG. 1.
- the voltage detector 11 and the control circuit 12 are omitted.
- the change-over switch 5 is also omitted. When the change-over switch 5 is switched to the AC power terminal AC and AC power from the AC power overhead line 2 is supplied through the pantograph 4 (1 ⁇ , AC15 kV, AC25 kV). Indicates the state.
- each of the plurality of short-circuit circuits 40 is included in the control circuit 12 illustrated in FIG.
- each short circuit 40 can be included in each converter group 10 or provided individually.
- the first converter 13 includes four semiconductor switch elements SW11 to SW14 and four semiconductor diode elements D11 to D14 that form a bridge circuit.
- Each of the semiconductor diode elements D11 to D14 is connected between the drain terminal and the source terminal of each of the semiconductor switch elements SW11 to SW14 so as to be in the forward direction from the source terminal to the drain terminal.
- the first inverter 14 includes four semiconductor switch elements SW21 to SW24 and four semiconductor diode elements D21 to D24 that form a bridge circuit.
- connection node between the semiconductor switch elements SW11 and SW12 of the first converter 13 and the connection node between the semiconductor switch elements SW21 and SW22 of the first inverter 14 A connection node between the semiconductor switch elements SW13 and SW14 of the first converter 13 and a connection node between the semiconductor switch elements SW23 and SW24 of the first inverter 14 are respectively connected.
- the connection node between the semiconductor switch elements SW14 and SW11 and the connection node between the semiconductor switch elements SW12 and SW13 of the first converter 13 are connected to the short circuit 40.
- the connection node between the semiconductor switch elements SW24 and SW21 and the connection node between the semiconductor switch elements SW22 and SW23 of the first inverter 14 are connected to the primary side (input side) of the transformer 15.
- the second converter 16 includes four semiconductor switch elements SW31 to SW34 and four semiconductor diode elements D31 to D34 that form a bridge circuit.
- the connection node between the semiconductor switch elements SW34 and SW31 and the connection node between the semiconductor switch elements SW32 and SW33 of the second converter 16 are connected to the secondary side (output side) of the transformer 15.
- the connection node between the semiconductor switch elements SW31 and SW32 of the second converter 16 and the connection node between the semiconductor switch elements SW33 and SW34 are connected at the output node of the second converter 16 of each converter group 10.
- Each short circuit 40 includes two semiconductor switch elements SW41 to SW42 and two semiconductor diode elements D41 to D42.
- Each of the semiconductor diode elements D41 to D42 is connected between the drain terminal and the source terminal of each of the semiconductor switch elements SW41 to SW42 so as to be in the forward direction from the source terminal to the drain terminal.
- the source terminal of the semiconductor switch element SW41 and the source terminal of the semiconductor switch element SW42 are connected, and the drain terminal of the semiconductor switch element SW41 is connected to the semiconductor switch elements SW14 and SW11 of the first converter 13 of each converter group 10.
- the drain terminal of the semiconductor switch element SW42 is connected to a connection node between the semiconductor switch elements SW12 and SW13 of the first converter 13 of each converter group 10.
- connection node between the semiconductor switch elements SW14 and SW11 of the first converter 13 of each converter group 10 is the pantograph 4 (only the first stage) or the semiconductor switch element SW12 of the first converter 13 of the converter group 10 connected in the previous stage. Are connected to the connection node of SW13. Further, the connection node between the semiconductor switch elements SW12 and SW13 of the first converter 13 of each converter group 10 is the connection node or ground of the semiconductor switch elements SW14 and SW11 of the first converter 13 of the converter group 10 connected at the subsequent stage. It is connected to the potential (only the last stage).
- the plurality of converter groups 10 include at least one redundant converter group.
- one of 15 sets of converter groups 10 is a redundant converter group 10-R
- the other 14 groups are normal converter groups 10-1 to 10-14.
- the plurality of short-circuit circuits 40 respectively connected to the plurality of converter groups 10 are also one set of redundancy short-circuit circuits 40-R
- the other 14 groups are regular short-circuit circuits 40-1 to 40-R. 40-14.
- the 14 pairs of normal converter groups 10-1 to 10-14 when 14 pairs of normal converter groups are driven, AC 25 kV can be handled, and 8 pairs of normal converter groups are driven. In this case, AC 15 kV can be handled.
- Redundant converter group 10-R is a first converter group when an operation failure occurs in one of the 14 pairs of normal converter groups 10-1 to 10-14.
- the short circuit 40 connected to is activated to bypass the first converter group, and the redundant converter group performs power conversion operation instead of the first converter group.
- the short circuit 40-R connected to the redundant converter group 10-R may be multiplexed.
- FIG. 2 an example is shown in which two short circuit circuits 40-R are connected in parallel to the redundant converter group 10-R and are duplicated.
- the semiconductor switch elements constituting the first converter 13, the first inverter 14, and the second converter 16 included in each of the plurality of converter groups 10 are gate-controlled by the control circuit 12.
- the first converter 13 receives AC power input from the pantograph 4 (first stage only) or the converter group 10 connected in the previous stage by turning on / off the semiconductor switch elements SW11 to SW14 by gate control by the control circuit 12. Convert to DC power.
- the first inverter 14 converts the DC power input from the first converter 13 into AC power by turning on / off the semiconductor switch elements SW21 to SW24 by gate control by the control circuit 12.
- the AC power converted by the first inverter 14 becomes an input to the primary side of the transformer 15.
- the transformer 15 converts AC power input to the primary side into desired AC power and outputs it from the secondary side.
- the second converter 16 converts the AC power input from the secondary side of the transformer 15 into DC power by turning on / off the semiconductor switch elements SW31 to SW34 by gate control by the control circuit 12.
- the semiconductor switch elements SW41 to SW42 constituting each of the plurality of short-circuit circuits 40 are also gate-controlled by the control circuit 12.
- the semiconductor switch element SW41 When the short circuit 40 is activated, the semiconductor switch element SW41 is turned on and the semiconductor switch element SW42 is turned off by gate control by the control circuit 12, so that the current flows through the semiconductor switch element SW41 and the semiconductor diode element D42. The flow and the short circuit 40 are made to flow.
- the converter group 10 connected to the short circuit 40 becomes non-conductive, and the converter group 10 is bypassed.
- the semiconductor switch elements SW41 and SW42 are turned off by gate control by the control circuit 12, thereby making the short circuit 40 non-conductive.
- the converter group 10 connected to the short circuit 40 becomes a flow, and the converter group 10 performs a power conversion operation.
- FIGS. 3A, 3B, and 3C are explanatory diagrams illustrating an example of operations of the converter group and the short circuit when the different overhead line voltages are input.
- 4A and 4B are explanatory diagrams showing an example of the appearance of a module that houses a converter group and a short circuit corresponding to the operation of FIG.
- one set is a redundant converter group 10-R, and the other 14 groups are regular converter groups 10-1 to 10-14.
- the plurality of short circuits 40 are also one set of redundant short circuits 40-R and the other 14 sets are regular short circuits 40-1 to 40-14.
- the withstand voltage when a plurality of converter groups 10 are connected in series is higher than the highest voltage of the plurality of AC power from the plurality of AC power overhead wires 2.
- the withstand voltage when 14 sets of converter groups are connected in series is higher than AC25 kV
- the withstand voltage when 8 sets of converter groups are connected in series is higher than AC15 kV.
- FIG. 3A shows a case where 14 converter groups are driven
- FIGS. 3B and 3C show a case where 8 converter groups are driven.
- circles indicated by broken lines indicate the short circuit 40, the first converter 13, the first inverter 14, and the second converter 16, respectively.
- the white background indicates a current-flowing state in which a current flows in the corresponding circuit
- the dot notation indicates a non-current state in which the current does not flow through the corresponding circuit.
- the short circuit 40 connected thereto is in a non-conduction state.
- the short circuit 40 connected to the first converter 13, the first inverter 14, and the second converter 16 is in a current state.
- the transducer group is bypassed.
- FIG. 3A when AC power on the high voltage overhead line side such as 1 ⁇ and AC 25 kV is input to a plurality of AC power overhead lines 2, a part of 14 of 15 converter groups 10 A power conversion operation is performed using a pair of converter groups 10-1 to 10-14.
- the other set is a redundant converter group 10-R.
- the eighth converter group is the redundancy converter group 10-R.
- the first to seventh converter groups 10-1 to 10-7 performing power conversion operation are connected in series, bypassing the eighth redundant converter group 10-R,
- the ninth to fifteenth converter groups 10-8 to 10-14 that perform power conversion operation are connected in series.
- the eighth redundant converter group 10-R becomes a converter group that activates the short circuit 40-R connected to the redundant converter group and does not perform the power conversion operation.
- the current when AC 25 kV AC power is input is supplied to the first to seventh converter groups 10-1 to 10-7 and the eighth redundant converter group 10-R. It flows to the ground potential through the connected short circuit 40-R, the 9th to 15th converter groups 10-8 to 10-14.
- the redundant conversion The short circuit 40-R connected to the device group 10-R is activated (flowed), and the redundant converter group 10-R is bypassed. If any of the first to seventh converter groups 10-1 to 10-7 and the ninth to fifteenth converter groups 10-8 to 10-14 (for example, the converter group 10-5). ) Is inactivated, the short circuit 40-R connected to the redundant converter group 10-R is deactivated instead of the converter group (for example, the converter group 10-5) in which this defect has occurred.
- the redundant converter group 10-R is subjected to a power conversion operation.
- the first, third, fifth, seventh, ninth, eleventh, thirteenth, thirteenth, and fifteenth converter groups 10-1 and 10-3 performing power conversion operation.
- the first, tenth, twelfth, and fourteenth transducer groups 10-2, 10-4, 10-6, 10-R, 10-9, 10-11, and 10-13 are alternately connected in series. Connected. In this connection state, the current when AC 15 kV AC power is input is the short circuit 40-2, 3 connected to the first set of converter group 10-1 and the second set of converter group 10-2.
- Short circuit 40-4 connected to the fourth converter group 10-3, the fourth converter group 10-4,..., The seventh converter group 10-7, the eighth redundant conversion Short circuit 40-R connected to the device group 10-R, 9th converter group 10-8,..., 15 short circuit 40-13, 15 sets connected to the 14th converter group 10-13 It flows to the ground potential through the eye transducer group 10-14.
- the eighth redundant converter group The short-circuit circuit 40-R connected to the 10-R is deactivated (non-energized), and the redundant converter group 10-R is operated for power conversion.
- the second group, the fourth group, the sixth group, the tenth group, the 12th group, 14th in addition to the eighth group of redundant converter groups 10-R.
- the converter groups 10-2, 10-4, 10-6, 10-9, 10-11, and 10-13 in the set can be subjected to power conversion operation.
- FIG. 10 when AC power on the low voltage overhead line side such as 1 ⁇ and AC 15 kV is input, a configuration as shown in FIG. In this configuration, the first to seventh converter groups 10-1 to 10-7 that perform power conversion operation are connected in series, and the short-circuit circuit is activated and the power conversion operation is not performed.
- the converter groups 10-R and 10-8 to 10-13 are connected in series, and the 15th converter group 10-14 that performs power conversion operation is connected.
- the eighth to fourteenth converter groups 10-R , 10-8 to 10-13 are activated (flowed) to bypass each converter group. If a failure occurs in any of the first to seventh and fifteenth converter groups 10-1 to 10-7, 10-14, instead of the converter group in which the defect has occurred, Then, the short-circuit circuit 40-R connected to the eighth redundant converter group 10-R is deactivated (non-energized), and the redundant converter group 10-R is subjected to power conversion operation. Instead of the converter group in which the failure has occurred, in addition to the eighth redundant converter group 10-R, the ninth to fourteenth converter groups 10-8 to 10-13 are subjected to power conversion. It is also possible to operate.
- FIG. 4 (a) is a diagram showing an example of the appearance of a module that houses a converter group and a short circuit corresponding to the operation of FIG. 3 (b). That is, FIG. 4A shows the first group, the third group, the fifth group, the seventh group, the ninth group, the eleventh group, the thirteenth group, and the fifteenth group of converters 10- 1, 10-3, 10-5, 10-7, 10-8, 10-10, 10-12, 10-14, and the second set in which the short circuit is activated and the power conversion operation is not performed.
- the modules for storing 10-13 are arranged alternately.
- FIG. 4B is a diagram showing an example of the appearance of a module that houses a converter group and a short circuit corresponding to the operation of FIG. That is, in FIG. 4B, modules that house the first to seventh converter groups 10-1 to 10-7 that perform power conversion operation are arranged side by side, and a short circuit is activated next to the modules.
- the eighth to fourteenth converter groups 10-R and 10-8 to 10-13 are arranged side by side, and the 15th converter group 10- 14 is arranged.
- the driving method shown in FIG. 3 (b) and the driving method shown in FIG. 3 (c) are compared, the driving method shown in FIG. Since the converter groups that are not allowed are grouped together, it is easy to control the operation by activation / deactivation. Further, when the module configuration shown in FIG. 4A is compared with the module configuration shown in FIG. 4B, the module configuration shown in FIG. 4A accommodates a converter group that performs power conversion operation. Since the modules that house the converter groups that are not to perform the power conversion operation are alternately arranged, heat generation due to the operation of the converter groups is also alternated, which is excellent in terms of heat dissipation. ⁇ Semiconductor switch element and semiconductor diode element>
- FIGS. 5 and 6 show examples of the structure of the semiconductor switch element, respectively
- FIGS. 7A, 7B, and 8A, 8B show examples of the structure of the semiconductor diode element, respectively.
- the semiconductor switch element and the semiconductor diode element used for the power converter in the present embodiment are made of a silicon material or a compound material of silicon carbide (SiC) or gallium nitride (GaN).
- SiC silicon carbide
- GaN gallium nitride
- the semiconductor switch element is made of a silicon material
- the semiconductor diode element is made of a compound material.
- the semiconductor switch element and the semiconductor diode element are made of a compound material.
- FIG. 5 is a cross-sectional view showing an example of the structure of a semiconductor switch element (SiC-MOS).
- the SiC-MOS is a semiconductor switch element SW of a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) made of a SiC compound material.
- FIG. 5 shows a so-called DMOS (Double Diffusion Metal Oxide Semiconductor) type SiC-MOS.
- SPm is a source electrode
- GPm is a gate electrode
- DRm is a drain electrode
- SUB is a substrate
- Tox is a gate insulating film
- N + is a source layer
- P is a base layer
- DFT is a drift layer.
- the source layer N + serving as the n + -type region connected to the source electrode SPm is connected to the drift layer DFT via a channel formed in the base layer P serving as the p-type region. Connected to.
- the drift layer DFT is, for example, an n ⁇ type region, and plays a role of securing a breakdown voltage.
- the substrate SUB is, for example, an n + type region, and the drain electrode DRm is connected to the substrate SUB.
- each of the source electrode SPm, the gate electrode GPm, and the drain electrode DRm is connected to each electrode pad using a metal wiring layer.
- SiC-DMOS there is an advantage that the element structure is simple and the manufacturing cost can be reduced as compared with a trench structure type SiC-MOS. Therefore, a low-cost and low-loss power converter can be realized.
- FIG. 6 is a cross-sectional view showing an example of the structure of a semiconductor switch element (SiC-IGBT).
- the SiC-IGBT is an IGBT (Insulated Gate Bipolar Transistor) semiconductor switch element SW made of a SiC compound material.
- the SiC-IGBT in FIG. 6 is different from the SiC-MOS in that a high concentration P + layer and a buffer layer N + Buf exist between the drift layer DFT and the substrate SUB.
- the presence of the high-concentration P + layer causes a conductivity modulation phenomenon and dramatically reduces the on-resistance.
- the switching loss of the element can be reduced by applying the buffer layer N + Buf as necessary.
- the SiC-IGBT structure is more complex than the SiC-MOS structure and requires more cost to form an element.
- the switch loss can be reduced, there is an advantage that the loss of the converter can be reduced.
- FIG. 7A and 7B are diagrams showing an example of the structure of the semiconductor diode element (SiC-SBD), where FIG. 7A is a plan view and FIG. 7B is a cross-sectional view taken along the line A-A ′ in FIG. SiC-SBD is a semiconductor diode element of a Schottky barrier diode composed of a SiC compound material.
- the structure of the Schottky barrier diode D shown in FIG. 7 is a JTE (Junction Termination Extension) structure.
- JTE Joint Termination Extension
- AP is an anode electrode pad
- SUB is a substrate
- DFTd is a drift layer
- ACTd is an active region
- TMd is a termination region
- CHSTPd is a channel stop region
- IL3 is a passivation film
- Cathode is a back electrode
- IL1 is a surface electrode
- IL2 is an electrode connected to the channel stop region CHSTPd.
- FIG. 7 shows an n ⁇ type drift layer DFTd on an n + type substrate SUBd, and p + type guard ring regions p + , p type regions p and n + type channel stop regions formed on the upper surface of the n ⁇ type drift layer DFTd. Only the CHSTPd, the passivation film IL3, the back electrode Cathode, the front surface electrode IL1, and the electrode IL2 are shown, and the passivation film and the resin film formed above the illustration are omitted.
- the active region ACTd at the center of the semiconductor chip is illustrated as a so-called JBS (Junction Barrier Schottky) structure in which p + regions and n ⁇ regions are alternately arranged.
- JBS Joint Barrier Schottky
- the electric field tends to concentrate on the edge portion of the p + -type guard ring region, but the presence of the p-type JTE region p can alleviate the electric field concentration. As a result, the breakdown voltage of the power device can be increased. That is, by using in combination with the power module according to the present embodiment, a more reliable power conversion system can be realized.
- FIG. 8A and 8B are diagrams showing an example of the structure of the semiconductor diode element (SiC-PND), where FIG. 8A is a plan view and FIG. 8B is a cross-sectional view taken along the line AA ′ in FIG.
- the SiC-PND is a PN junction diode semiconductor diode element made of a SiC compound material.
- the PN junction diode D of FIG. 8 is different from the Schottky barrier diode of FIG. 7 in that a high concentration p + region is formed above the active region ACTd and forms a PN junction with n ⁇ of the drift layer DFTd. It is. Since a PN junction exists in the active region ACTd, the conductivity modulation phenomenon occurs in this portion.
- FIG. 9 is a circuit diagram showing an example of a configuration of a converter group and a final stage inverter that constitute the power converter.
- FIG. 9 shows an example in which the converter group (converter group 10-1 is shown) and the semiconductor switch element and the semiconductor diode element of the final stage inverter are composed of a SiC compound material.
- Each converter group 10 which comprises a power converter contains the 1st converter 13, the 1st inverter 14, the transformer 15, and the 2nd converter 16, as demonstrated in FIG.
- the first converter 13 is composed of semiconductor switch elements SW11 to SW14 and semiconductor diode elements D11 to D14.
- the semiconductor switch elements SW11 to SW14 are composed of SiC-MOS, and the semiconductor diode elements D11 to D14 are composed of SiC-SBD.
- the semiconductor switch elements SW21 to SW24 and SW31 to SW34 are composed of SiC-MOS, and the semiconductor diode elements D21 to D24 and D31 to D34 are composed of SiC-SBD.
- each short circuit 40 for short-circuiting each converter group 10 shown in FIG. 2 is also configured by the semiconductor switch elements SW41 to SW42 being made of SiC-MOS, and the semiconductor diode elements D41 to D40.
- D42 is composed of SiC-SBD.
- the second inverter 21 which is the final stage inverter connected to the shorted node of the output node of each converter group 10 is composed of semiconductor switch elements SW51 to SW56 and semiconductor diode elements D51 to D56.
- the semiconductor switch elements SW51 to SW56 are composed of SiC-IGBT, and the semiconductor diode elements D51 to D56 are composed of SiC-PND.
- the semiconductor switch elements SW51 to SW56 and the semiconductor diode elements D51 to D56 of the second inverter 21 are preferably made of a compound material, but can also be made of a silicon material.
- the semiconductor switch elements of the converter group 10 are composed of wide band gap unipolar elements, and the semiconductor switch element of the second inverter 21 is composed of a wide band gap bipolar element. Composed.
- compound semiconductors such as SiC and GaN having a larger band gap than silicon are attracting attention. Since the compound semiconductor has a large band gap, the breakdown voltage is about 10 times that of silicon. For this reason, the compound device can be made thinner than the Si device, and the resistance value (Ron) during conduction can be greatly reduced.
- the power converter in the present embodiment uses a switch element and a diode element using a compound material.
- the device which uses a different kind of element by the semiconductor switch element of the converter group 10 and the semiconductor switch element of the 2nd inverter 21 is also performed.
- a unipolar element as the semiconductor switch element of the converter group 10
- the switch loss is small and an operation with a high frequency is possible.
- the unipolar element has a high input impedance, it has an advantage that a weak voltage can be amplified with little noise and has a high withstand voltage.
- a bipolar element as the semiconductor switching element of the second inverter 21, it is possible to cope with a large current.
- the power converter 1 that can be provided can be provided. More details are as follows.
- the first converter 13, the first inverter 14, and the second converter 16 are configured by unipolar elements, and the second inverter 21 is configured by a bipolar element, so that it corresponds to the characteristics of the elements.
- a suitable operation can be realized.
- the switch loss utilizing the characteristics of the unipolar element is small, and it is possible to cope with a high current operation utilizing the characteristics of the bipolar element and the operation at high frequency.
- the first converter 13, the first inverter 14, the transformer 15, and the second converter 16 constitute one converter group 10, and a plurality of withstand voltages are obtained when the plurality of converter groups 10 are connected in series. It is possible to improve the reliability of the power converter 1 by selecting the converter group 10 to be activated according to the overhead voltage of the AC power overhead line 2 by being higher than the highest voltage of the AC power overhead line 2 of it can.
- the plurality of converter groups 10 include the redundant converter group 10-R, when an operation failure occurs in one converter group, the plurality of converter groups 10 are connected to the converter group in which the failure occurs.
- the short circuit 40 is activated to bypass this converter group, and instead the redundant converter group 10-R can perform a power conversion operation, so that the power converter 1 can perform a continuous power conversion operation.
- the short circuit 40-R connected to the redundancy converter group 10-R is multiplexed, the short circuit can be made redundant.
- a part of the converter group 10 that performs the power conversion operation and the converter group 10 that activates the short circuit 40 and does not perform the power conversion operation are alternately connected in series, so that the heat generated by the operation of the converter group 10 Since generation
- Each of the converter groups 10 that perform power conversion operation is connected in series, and each of the converter groups 10 that activates the short circuit 40 and does not perform power conversion operation is connected in series, thereby performing power conversion operation. Since the converter group 10 and the converter group 10 that does not perform the power conversion operation are gathered together, the power converter 1 that can easily control the operation by activation / deactivation can be realized.
- the short-circuit circuit 40-R connected to the redundant converter group 10-R is activated to bypass the redundant converter group 10-R.
- the redundant converter group 10-R can be made a converter group that does not perform the power conversion operation.
- the semiconductor switch element and the semiconductor diode element constituting the first converter 13, the first inverter 14, and the second converter 16 are made of a compound material of SiC or GaN. It is possible to increase the reliability of the power converter 1 by realizing high withstand voltage and low loss by utilizing the above, high efficiency and long life associated therewith.
- the first converter 13, the first inverter 14, the transformer 15, the second converter 16, the voltage detector 11, and the control circuit 12 constitute one converter group 10. Even in a configuration in which a plurality of units are connected in series, the same effects as the above (1) to (10) can be obtained.
- a power converter used for a railway vehicle has been described as an example.
- the present invention is not limited to this, and may be applied to a wind power generation system, a solar power generation system, or the like. Can do.
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Abstract
Description
[実施の形態の概要]
[一実施の形態]
<電力変換器を用いた鉄道車両>
<電力変換器を構成する変換器群および短絡回路>
<半導体スイッチ素子および半導体ダイオード素子>
<電力変換器を構成する変換器群および最終段インバータ>
<実施の形態の効果>
2 交流電力架線
3 直流電力架線
4 パンタグラフ
5 切り替えスイッチ
6 車輪
7 モータ
8 負荷機器
10 変換器群
11 電圧検出器
12 制御回路
13 第1コンバータ
14 第1インバータ
15 変圧器
16 第2コンバータ
21 第2インバータ
31 第3インバータ
32 変圧器
33 第3コンバータ
34 第4インバータ
40 短絡回路
Claims (15)
- 複数の交流電力のうちの第1交流電力を第1直流電力に変換する第1コンバータと、
前記第1直流電力を第2交流電力に変換する第1インバータと、
前記第2交流電力を第3交流電力に変換する変圧器と、
前記第3交流電力を第2直流電力に変換する第2コンバータと、
前記第2直流電力を第4交流電力に変換する第2インバータと、
を有し、
前記第1コンバータ、前記第1インバータ、および、前記第2コンバータは、ユニポーラ型素子から構成され、
前記第2インバータは、バイポーラ型素子から構成される、電力変換器。 - 請求項1記載の電力変換器において、
前記第1コンバータ、前記第1インバータ、前記変圧器、および、前記第2コンバータは1つの変換器群を構成し、前記変換器群を複数直列接続した構成において、
前記直列接続した複数の変換器群の出力ノードは短絡され、前記短絡されたノードは前記第2インバータの入力側に接続される、電力変換器。 - 複数の交流電力のうちの第1交流電力を第1直流電力に変換する第1コンバータと、
前記第1直流電力を第2交流電力に変換する第1インバータと、
前記第2交流電力を第3交流電力に変換する変圧器と、
前記第3交流電力を第2直流電力に変換する第2コンバータと、
を有し、
前記第1コンバータ、前記第1インバータ、前記変圧器、および、前記第2コンバータは、1つの変換器群を構成し、
前記変換器群を複数直列接続した場合の耐圧が、前記複数の交流電力のうちの最高電圧よりも高い、電力変換器。 - 請求項3記載の電力変換器において、
前記電力変換器は、前記直列接続した複数の変換器群と、前記複数の変換器群のそれぞれを短絡する複数の短絡回路と、を有し、
前記複数の変換器群は、少なくとも1つ以上の冗長用変換器群を含み、
前記複数の変換器群のうちの第1変換器群に動作不良が発生した場合には、前記第1変換器群に接続される前記短絡回路を活性化して前記第1変換器群をバイパスし、前記冗長用変換器群が前記第1変換器群の代わりに電力変換動作する、電力変換器。 - 請求項4記載の電力変換器において、
前記冗長用変換器群に接続される前記短絡回路は多重化されている、電力変換器。 - 請求項4記載の電力変換器において、
前記複数の交流電力のうちの低電圧側の交流電力を入力とする場合、前記複数の変換器群の一部を利用して電力変換動作をする、電力変換器。 - 請求項6記載の電力変換器において、
前記電力変換動作する変換器群の一部と、前記短絡回路を活性化して電力変換動作させない変換器群とは、交互に直列接続される、電力変換器。 - 請求項6記載の電力変換器において、
前記電力変換動作する変換器群の一部のそれぞれが直列接続され、前記短絡回路を活性化して電力変換動作させない変換器群のそれぞれが直列接続される、電力変換器。 - 請求項6記載の電力変換器において、
前記複数の変換器群に不良が発生していない場合は、前記冗長用変換器群に接続される前記短絡回路を活性化して前記冗長用変換器群をバイパスする、電力変換器。 - 請求項3記載の電力変換器において、
前記第1コンバータ、前記第1インバータ、および、前記第2コンバータは、半導体スイッチ素子と、半導体ダイオード素子と、から構成され、
前記半導体スイッチ素子および前記半導体ダイオード素子は、シリコンカーバイドまたはガリウムナイトライドの化合物材料から構成される、電力変換器。 - 複数の交流電力架線からの複数の交流電力を入力とする鉄道車両において、前記複数の交流電力のうちの第1交流電力を第1直流電力に変換する第1コンバータと、
前記第1直流電力を第2交流電力に変換する第1インバータと、
前記第2交流電力を第3交流電力に変換する変圧器と、
前記第3交流電力を第2直流電力に変換する第2コンバータと、
前記鉄道車両に入力される前記複数の交流電力の電圧を検出する電圧検出器と、
前記電圧検出器で検出された電圧に基づいて、前記第1コンバータ、前記第1インバータ、および、前記第2コンバータを制御する制御回路と、
を有し、
前記第1コンバータ、前記第1インバータ、前記変圧器、前記第2コンバータ、前記電圧検出器、および、前記制御回路は、1つの変換器群を構成し、前記変換器群を複数直列接続した構成において、
前記直列接続した複数の変換器群と、前記複数の変換器群のそれぞれを短絡する複数の短絡回路と、を有し、
前記複数の交流電力は、第1電圧の交流電力と、前記第1電圧より低い第2電圧の交流電力とを含み、
前記第2電圧の交流電力を入力とする場合、前記複数の変換器群の一部を利用して電力変換動作をする、電力変換器。 - 請求項11記載の電力変換器において、
前記電力変換動作する変換器群の一部と、前記短絡回路を活性化して電力変換動作させない変換器群とは、交互に直列接続される、電力変換器。 - 請求項11記載の電力変換器において、
前記電力変換動作する変換器群の一部のそれぞれが直列接続され、前記短絡回路を活性化して電力変換動作させない変換器群のそれぞれが直列接続される、電力変換器。 - 請求項11記載の電力変換器において、
前記複数の変換器群は、少なくとも1つ以上の冗長用変換器群を含み、
前記複数の変換器群に不良が発生していない場合は、前記冗長用変換器群に接続される前記短絡回路を活性化して前記冗長用変換器群をバイパスする、電力変換器。 - 請求項14記載の電力変換器において、
前記複数の変換器群のうちの第1変換器群に不良が発生した場合は、前記第1変換器群に接続される前記短絡回路を活性化して前記第1変換器群をバイパスし、前記冗長用変換器群が前記第1変換器群の代わりに電力変換動作する、電力変換器。
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US11923716B2 (en) | 2019-09-13 | 2024-03-05 | Milwaukee Electric Tool Corporation | Power converters with wide bandgap semiconductors |
JP7505031B2 (ja) | 2020-09-30 | 2024-06-24 | サングロー パワー サプライ カンパニー リミテッド | カスケード型マルチポートコンバータ及び三相中電圧入力システム |
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JPS63305723A (ja) * | 1987-06-05 | 1988-12-13 | Mitsubishi Electric Corp | 電力変換器 |
JPS63305724A (ja) * | 1987-06-05 | 1988-12-13 | Mitsubishi Electric Corp | 電力変換器 |
JP2005073362A (ja) * | 2003-08-22 | 2005-03-17 | Rikogaku Shinkokai | 電力変換装置、モータドライブ装置、btbシステムおよび系統連系インバータシステム |
Cited By (2)
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US11923716B2 (en) | 2019-09-13 | 2024-03-05 | Milwaukee Electric Tool Corporation | Power converters with wide bandgap semiconductors |
JP7505031B2 (ja) | 2020-09-30 | 2024-06-24 | サングロー パワー サプライ カンパニー リミテッド | カスケード型マルチポートコンバータ及び三相中電圧入力システム |
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JPWO2016098178A1 (ja) | 2017-07-06 |
JP6231225B2 (ja) | 2017-11-15 |
DE112014007164T5 (de) | 2017-08-31 |
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