WO2023286329A1 - 電力変換装置 - Google Patents
電力変換装置 Download PDFInfo
- Publication number
- WO2023286329A1 WO2023286329A1 PCT/JP2022/008997 JP2022008997W WO2023286329A1 WO 2023286329 A1 WO2023286329 A1 WO 2023286329A1 JP 2022008997 W JP2022008997 W JP 2022008997W WO 2023286329 A1 WO2023286329 A1 WO 2023286329A1
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- WIPO (PCT)
- Prior art keywords
- capacitor
- current
- main circuit
- cooler
- connection conductor
- Prior art date
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Classifications
-
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20927—Liquid coolant without phase change
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1427—Housings
- H05K7/1432—Housings specially adapted for power drive units or power converters
- H05K7/14322—Housings specially adapted for power drive units or power converters wherein the control and power circuits of a power converter are arranged within the same casing
Definitions
- the present invention relates to a power converter.
- Patent Document 1 discloses a configuration in which control circuits (gate terminals) are arranged on the left and right in order to reduce abrupt current changes (surges) during switching.
- Patent Document 1 Based on the configuration of Patent Document 1, it is necessary to realize magnetic interference suppression while responding to customer requests for miniaturization, so the present invention provides a power converter that achieves both thinness and reliability. That is the purpose.
- a power conversion device includes an inverter circuit configured by a plurality of switching elements, a first capacitor and a second capacitor connected in parallel with the inverter circuit, a control circuit section for controlling the inverter circuit, and the first capacitor. and a connection conductor portion for connecting the second capacitor, and a conductive member is arranged between the control circuit portion and the connection conductor portion.
- FIG. 1 is an overall perspective view of a power conversion device having the configuration of the present invention and a view with a housing cover removed;
- a diagram for explaining a configuration of a switching element of the power conversion device of FIG. 4 is a connection perspective view of the switching element of FIG. 3 and the main circuit board;
- FIG. AA sectional view of the power converter of FIG. 1 according to the first embodiment of the present invention A diagram for explaining the movement of the resonance current in FIG. Diagram explaining induced current and magnetic flux in FIG. Sectional drawing of the power converter device based on the 2nd Embodiment of this invention Figure 8 with housing
- FIG. 1 is an overall perspective view of a power converter having the configuration of the present invention and a view with the housing cover removed.
- the housing 2 of the power converter includes a DC input terminal 16 for supplying a DC current to an inverter circuit provided inside the housing 2, an AC conductor 19 for outputting AC current from the inverter circuit to an external motor (not shown), and an inverter. It has a coolant inlet 17 for supplying a coolant for cooling the circuit into the housing 2 and a control signal input/output terminal 18 for transmitting a control signal for the inverter circuit to an external controller. A part of the control signal input/output terminal 18 protrudes from the housing 2 for connection with a peripheral device of the housing 2 . Since the housing 2 seals the inside, it prevents foreign matter and water from entering the inverter circuit from the outside.
- the housing 2 is made of aluminum, iron, or the like.
- a first capacitor 1 which is a capacitor for smoothing a DC current input from a DC input terminal 16, a main circuit section 3 for converting the DC current into an AC current, and a main circuit section 3.
- a cooler 13 which is a coolant water passage for cooling, and a control circuit unit 7 for controlling an inverter circuit based on a command input from an external control device are mounted.
- Fig. 2 is a circuit diagram of the power converter in Fig. 1 and a diagram for explaining the movement of the current in the main circuit.
- the main circuit section 3 of the inverter circuit is composed of a DC input terminal 16, a second capacitor 8, an IGBT element 5a, a diode element 5b, and an AC conductor 19.
- the first capacitor 1 is connected in parallel with the positive and negative electrodes of the DC input terminal 16 .
- the IGBT element 5a is connected in series with the diode element 5b.
- the IGBT element 5a and the diode element 5b are connected in parallel with the second capacitor 8 .
- the IGBT element 5a is turned on or off based on a signal from the control circuit section 7, thereby converting a direct current into an alternating current.
- a three-phase inverter is configured by configuring the IGBT element 5a, the diode element 5b, and the second capacitor 8 as units for three phases.
- a transient current 10a such as a diode recovery current, generated as the IGBT element 5a is turned on and off flows from the second capacitor 8 along the dotted line path as shown.
- a resonance current 10 generated due to the wiring inductance of the connection conductor portion 4 connecting the first capacitor 1 and the second capacitor 8 and the main circuit wiring member 3a flows along the route of the thick black line as shown.
- a capacitor with a large capacitance such as a film capacitor is used for the first capacitor 1, and is composed of an insulating resin covering the periphery and terminals. Also, the first capacitor 1 is connected to the DC input terminal 16 via the main circuit wiring member 3a.
- FIG. 3 is a diagram for explaining the configuration of the switching elements of the power converter of FIG.
- FIG. 4 is a perspective view of connection between the switching element of FIG. 3 and the main circuit board.
- a first lead frame 6a is electrically connected to the upper surface of the IGBT element 5a, and a second lead frame 6b is electrically connected to the lower surface thereof by a joining member such as solder. Terminals are provided at the ends of the first lead frame 6a and the second lead frame 6b, respectively, and are electrically connected to the main circuit wiring member 3a by soldering or the like.
- the main circuit wiring member 3a is a board on which each lead frame is mounted, and a printed board, a copper bus bar, or the like is used.
- a third lead frame 6c is electrically connected to the upper surface of the diode element 5b, and a fourth lead frame 6d is electrically connected to the lower surface thereof by a bonding member such as solder, and the upper and lower surfaces thereof are cooled by a cooler 13, which will be described later. Terminals are provided at the ends of the third lead frame 6c and the fourth lead frame 6d, respectively, and are electrically connected to the main circuit wiring member 3a by soldering or the like.
- the second capacitor 8 is electrically connected to the IGBT element 5a and the diode element 5b through the main circuit wiring member 3a.
- the second capacitor 8 is arranged between the IGBT element 5a and the diode element 5b to shorten the path length of the wiring pattern of the main circuit wiring member 3a.
- FIG. 5 is a cross-sectional view of the power converter of FIG. 1 taken along line AA according to the first embodiment of the present invention.
- the main circuit section 3 is composed of a plurality of switching elements 5 , first capacitors 1 , second capacitors 8 , main circuit wiring members 3 a and sealing resin 9 .
- the switching element 5 the aforementioned IGBT element 5a, diode element 5b, MOSFET element, or the like is used.
- the main circuit section 3 is provided with conductive members such as lead frames 6 (the first lead frame 6a to the fourth lead frame 6d described above with reference to FIG. 3). They are electrically connected by a bonding material.
- the lead frame 6 is electrically connected to the main circuit wiring member 3a by soldering, welding, or the like.
- the second capacitor 8 uses a capacitor such as a ceramic capacitor that is small and has excellent frequency characteristics, and supplies a transient current immediately after the switching element 5 switches from ON to OFF or from OFF to ON.
- the second capacitor 8 is connected in parallel with the first capacitor 1 and arranged at a position where the wiring inductance between the IGBT element 5 a and the diode element 5 b is smaller than that of the first capacitor 1 .
- the first capacitor 1 and the second capacitor 8 are connected in parallel with the inverter circuit.
- the sealing resin 9 covers the first capacitor 1, the plurality of switching elements 5, the lead frame 6, and the main circuit wiring member 3a, thereby suppressing foreign matter from entering the main circuit section 3. .
- the conductive member 2 is the same as the housing 2 described in FIG. 1, and is made of aluminum, iron, copper, or the like.
- the conductive member 2 can also be used as a fixing member for the first capacitor 1 , the main circuit section 3 and the control circuit section 7 .
- heat radiation performance can be improved.
- the conductive member 2 is provided with an uneven shape around the second capacitor 8, the main circuit section 3, the control circuit section 7, and the first capacitor 1 according to the height difference of each component. there is As a result, the conductive member 2 can be brought close to each current path passing through the second capacitor 8, the main circuit section 3, and the control circuit section 7, and the magnetic flux canceling effect, which will be described later, can be improved.
- the control circuit unit 7 is connected to the switching element 5 via a connector, main circuit wiring member 3a, wire bonding, etc., and controls the switching element 5 to be turned on and off.
- the control circuit unit 7 is supplied with a gate drive circuit that drives the gate of the switching element 5, a motor control circuit that generates gate signals corresponding to the rotation speed and torque of the motor, and power necessary for the operation of each control circuit. It is equipped with a power supply circuit that
- connection conductor portion 4 is a terminal of the first capacitor 1 and is connected to the main circuit wiring member 3a. of resonance current 10 flows.
- FIG. 6 is a diagram explaining the movement of the resonance current in FIG.
- the second capacitor 8 is arranged in the vicinity of the switching element 5 in order to reduce the wiring inductance of the current path constructed by the plurality of switching elements 5, and is arranged in parallel with the first capacitor 1 via the main circuit wiring member 3a. connected to
- the first capacitor 1 supplies steady current while the switching element 5 is on or off. At this time, since wiring inductance exists in the electric wiring connecting the first capacitor 1 and the second capacitor 8 , a resonance current 10 is generated between the first capacitor 1 and the second capacitor 8 .
- FIG. 7 is a diagram explaining the induced current and magnetic flux in FIG.
- a part of the conductive member 2 is arranged between the connection conductor portion 4 that connects the first capacitor 1 and the second capacitor 8 and the control circuit portion 7 .
- an induced current 11 is generated in the conductive member 2 due to the resonance current 10 flowing through the connection conductor portion 4 .
- the magnetic flux 12b of the resonance current 10 is canceled by the magnetic flux 12a generated by the induced current 11.
- FIG. 1 magnetic interference of the magnetic flux 12b of the resonance current 10 flowing through the connection conductor portion 4 with the control circuit portion 7 can be suppressed. Thereby, stable operation of the control circuit section 7 can be realized.
- the transient current 10a flowing between the switching element 5 and the second capacitor 8 in the main circuit wiring member 3a also causes the main circuit wiring member
- An induced current is generated in the conductive members 2 arranged to face each other on the upper and lower surfaces of 3a. This induced current reduces the wiring inductance of the path of the transient current 10a. Further, leakage of the magnetic flux caused by the transient current 10a is suppressed by the induced current generated in the conductive member 2.
- FIG. 8 is a cross-sectional view of a power conversion device according to a second embodiment of the present invention.
- the cooler 13 is made of a material with excellent thermal conductivity, such as aluminum or copper. By providing fins, the heat radiation surface area is increased, and the cooling performance can be improved by cooling air or cooling water supplied from the outside. can. By providing the coolers 13 on both upper and lower surfaces of the main circuit section 3, the cooling performance of the inverter circuit can be improved. Cooler 13 is in contact with lead frame 6 via an insulating member. This insulating member is coated with heat dissipation grease or the like in order to enhance the adhesion between the lead frame 6 and the cooler 13 .
- the gate terminal 14 is arranged on the control circuit section 7 side.
- the conductive coolers 13 above and below the inverter circuit, particularly above and below the switching element 5 that generates a large amount of heat, not only can the cooling performance of the inverter circuit be improved and the size can be reduced, As with the member 2, it is possible to cancel the magnetic flux of the resonance current by the magnetic flux generated by the induced current caused by the resonance current flowing through the connection conductor 4, thereby suppressing magnetic interference between the control circuit 7 and the connection conductor 4. can do.
- FIG. 9 is a diagram of FIG. 8 with a housing.
- the first capacitor 1 , the cooler 13 , the main circuit section 3 and the control circuit section 7 are fixed to the bottom surface of the housing 2 .
- the housing 2 By arranging the housing 2 so that the gap between it and the cooler 13 is narrowed, the effect of reducing magnetic interference can be further improved.
- the housing 2 close to the connection conductor 4 the wiring inductance can be reduced, and the above-described resonance current can be suppressed.
- the cooling performance of the connection conductor 4 can be improved.
- the first capacitor 1 is fixed to the housing 2 via an insulating heat dissipating member, and the cooler 13 is also fixed to the housing 2 via a similar heat dissipating member. Therefore, the heat generated in the first capacitor 1 can be released to the coolant flowing in the cooler 13 .
- the upper and lower surfaces of the connection conductor portion 4 and the cooler 13 are covered with the conductive housing 2, so that the magnetic flux of the resonance current, which could not be canceled by the cooler 13 alone, can be eliminated by the conductive housing. 2 can be canceled by the magnetic flux of the induced current.
- FIG. 10 is a top cross-sectional view of a power conversion device according to a third embodiment of the present invention.
- a coolant inlet 17 provided in the housing 2 is connected to an external coolant supply device such as a fan or pump, and coolant such as cooling air, cooling water, or cooling oil is supplied to the interior of the housing 2 . Also, the coolant inlet 17 is connected to the cooler 13, and the connection point is sealed by a sealing member such as an O-ring.
- the coolant inlet 17 is arranged in a direction perpendicular to the direction in which the first capacitor 1 , the main circuit section 3 , and the control circuit section 7 are arranged, and on the side of the cooler 13 . As a result, it is possible to shorten the flow path length of the coolant while avoiding layout interference with other components such as the first capacitor 1 and the main circuit section 3 . Furthermore, by arranging the coolant inlet 17 on the side of the cooler 13, the overall thickness of the cooling section can be reduced.
- the power conversion device includes an inverter circuit composed of a plurality of switching elements, a first capacitor 1 and a second capacitor 8 connected in parallel with the inverter circuit, a control circuit section 7 for controlling the inverter circuit, A connection conductor portion 4 that connects the first capacitor 1 and the second capacitor 8 is provided, and the conductive member 2 is arranged between the control circuit portion 7 and the connection conductor portion 4 .
- the conductive member 2 is a cooler 13 that cools the inverter circuit. By doing so, not only is the cooling performance of the inverter circuit improved and the size is reduced, but the magnetic flux of the resonant current is canceled by the magnetic flux generated by the induced current caused by the resonant current flowing through the connection conductor portion 4 .
- the power converter has conductive members 2 on the upper and lower surfaces of the connection conductor portion 4 and the cooler 13 . By doing so, the magnetic flux of the resonance current, which cannot be canceled by the cooler 13 alone, is canceled by the magnetic flux of the induced current generated in the conductive housing 2 .
- the power converter is provided with a coolant inlet 17 on the side of the cooler 13 .
- a coolant inlet 17 on the side of the cooler 13 .
- the present invention is not limited to the above embodiments, and various modifications and other configurations can be combined without departing from the scope of the invention. Moreover, the present invention is not limited to those having all the configurations described in the above embodiments, and includes those having some of the configurations omitted.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inverter Devices (AREA)
Abstract
Description
図8は、本発明の第2の実施形態に係る、電力変換装置の断面図である。
図10は、本発明の第3の実施形態に係る、電力変換装置の上方断面図である。
2 筐体(導電性部材)
3 主回路部
3a 主回路配線部材
4 接続導体部
5 スイッチング素子
5a IGBT素子
5b ダイオード素子
6 リードフレーム
6a 第1リードフレーム
6b 第2リードフレーム
6c 第3リードフレーム
6d 第4リードフレーム
7 制御回路部
8 第2キャパシタ
9 封止樹脂
10 共振電流
10a 過渡電流
11 誘導電流
12a 磁束(誘導電流側)
12b 磁束(共振電流側)
13 冷却器
14 ゲート端子
16 直流入力端子
16a 直流入力端子接続部
17 冷媒流入口
18 制御信号入出力端子
19 交流導体
Claims (4)
- 複数のスイッチング素子により構成されるインバータ回路と、
前記インバータ回路と並列に接続される第1キャパシタ及び第2キャパシタと、
前記インバータ回路を制御する制御回路部と、
前記第1キャパシタと前記第2キャパシタとを接続する接続導体部と、を備え、
前記制御回路部と前記接続導体部との間には、導電性部材が配置される
電力変換装置。 - 請求項1に記載の電力変換装置であって、
前記導電性部材は、前記インバータ回路を冷却する冷却器である
電力変換装置。 - 請求項2に記載の電力変換装置であって、
前記接続導体部と前記冷却器との上下面に前記導電性部材を設けた
電力変換装置。 - 請求項2に記載の電力変換装置であって、
前記冷却器の側方に、冷媒流入口を設けた
電力変換装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280035914.4A CN117356025A (zh) | 2021-07-14 | 2022-03-02 | 电力变换装置 |
US18/563,667 US20240244807A1 (en) | 2021-07-14 | 2022-03-02 | Electric power converter |
DE112022001737.6T DE112022001737T5 (de) | 2021-07-14 | 2022-03-02 | Umsetzer für elektrische leistung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021116693A JP7660039B2 (ja) | 2021-07-14 | 2021-07-14 | 電力変換装置 |
JP2021-116693 | 2021-07-14 |
Publications (1)
Publication Number | Publication Date |
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WO2023286329A1 true WO2023286329A1 (ja) | 2023-01-19 |
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PCT/JP2022/008997 WO2023286329A1 (ja) | 2021-07-14 | 2022-03-02 | 電力変換装置 |
Country Status (5)
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US (1) | US20240244807A1 (ja) |
JP (1) | JP7660039B2 (ja) |
CN (1) | CN117356025A (ja) |
DE (1) | DE112022001737T5 (ja) |
WO (1) | WO2023286329A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003219661A (ja) * | 2002-01-24 | 2003-07-31 | Toshiba Mach Co Ltd | サーボアンプ |
JP2007089395A (ja) * | 2006-11-24 | 2007-04-05 | Hitachi Ltd | 車両用電力変換装置 |
WO2019159316A1 (ja) * | 2018-02-16 | 2019-08-22 | 三菱電機株式会社 | 電力変換装置および冷凍サイクル装置 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112470390B (zh) | 2018-07-25 | 2024-11-19 | 株式会社电装 | 电源模块及电力转换装置 |
-
2021
- 2021-07-14 JP JP2021116693A patent/JP7660039B2/ja active Active
-
2022
- 2022-03-02 CN CN202280035914.4A patent/CN117356025A/zh active Pending
- 2022-03-02 US US18/563,667 patent/US20240244807A1/en active Pending
- 2022-03-02 WO PCT/JP2022/008997 patent/WO2023286329A1/ja active Application Filing
- 2022-03-02 DE DE112022001737.6T patent/DE112022001737T5/de active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003219661A (ja) * | 2002-01-24 | 2003-07-31 | Toshiba Mach Co Ltd | サーボアンプ |
JP2007089395A (ja) * | 2006-11-24 | 2007-04-05 | Hitachi Ltd | 車両用電力変換装置 |
WO2019159316A1 (ja) * | 2018-02-16 | 2019-08-22 | 三菱電機株式会社 | 電力変換装置および冷凍サイクル装置 |
Also Published As
Publication number | Publication date |
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CN117356025A (zh) | 2024-01-05 |
JP7660039B2 (ja) | 2025-04-10 |
DE112022001737T5 (de) | 2024-01-04 |
JP2023012927A (ja) | 2023-01-26 |
US20240244807A1 (en) | 2024-07-18 |
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