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公开(公告)号：US20240251532A1
公开(公告)日：2024-07-25
申请号：US18564139
申请日：2022-02-25
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takeshi TOKUYAMA , Takahiro ARAKI , Shigehisa AOYAGI , Noriyuki MAEKAWA
CPC classification number: H05K7/20927 , H02M7/003 , H05K1/181 , H05K2201/0323
Abstract: A power conversion device includes a plurality of circuit bodies each including a semiconductor element, and a printed circuit board having the plurality of circuit bodies mounted thereon and having a relay wiring connecting the plurality of circuit bodies to each other, a DC wiring, and an AC wiring, wherein at least one of the AC wiring and the DC wiring is connected to a conductor member.
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公开(公告)号：US20240413746A1
公开(公告)日：2024-12-12
申请号：US18702542
申请日：2022-10-05
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takeshi TOKUYAMA , Masahiro SEO , Takahiro ARAKI , Shigehisa AOYAGI
Abstract: A power conversion device includes a substrate on which DC wiring and AC wiring are formed, and a plurality of circuit bodies that are electrically connected in parallel and have a first terminal and a second terminal each connected to the DC wiring or the AC wiring. The first terminals and the second terminals are adjacent to each other in the circuit bodies and protrude in a same direction, and the plurality of circuit bodies are disposed such that the first terminals and the second terminals are alternately arranged side by side on the substrate.
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公开(公告)号：US20240380337A1
公开(公告)日：2024-11-14
申请号：US18686225
申请日：2022-03-04
Applicant: Hitachi Astemo, Ltd.
Inventor： Takafumi HARA , Takaya TSUKAGOSHI , Katsuhiro HOSHINO , Shigehisa AOYAGI
IPC: H02M7/5395 , H02M1/15 , H02P27/08
Abstract: An inverter control device includes: a carrier wave generation unit that generates a carrier wave; a carrier frequency adjustment unit that adjusts a frequency of the carrier wave; and a PWM control unit that performs pulse width modulation on a voltage command using the carrier wave and generates a PWM pulse signal for controlling an operation of an inverter. The carrier frequency adjustment unit determines a phase shift amount for reducing a voltage amplitude of a specific order component among order components of a voltage ripple superimposed on a DC voltage, and adjusts a frequency of the carrier wave so as to change a phase difference between the voltage command and the carrier wave according to the determined phase shift amount.
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公开(公告)号：US20240244807A1
公开(公告)日：2024-07-18
申请号：US18563667
申请日：2022-03-02
Applicant: HITACHI ASTEMO, LTD.
Inventor： Takahiro ARAKI , Takeshi TOKUYAMA , Masahiro SEO , Noriyuki MAEKAWA , Shigehisa AOYAGI
CPC classification number: H05K7/20927 , H02M7/003 , H05K7/14322
Abstract: An electric power converter includes: an inverter circuit including a plurality of switching elements; a first capacitor and a second capacitor connected in parallel with the inverter circuit; a control circuit unit that controls the inverter circuit; and a connection conductor portion that connects the first capacitor and the second capacitor, wherein a conductive member is disposed between the control circuit unit and the connection conductor portion.
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公开(公告)号：US20230395457A1
公开(公告)日：2023-12-07
申请号：US18034305
申请日：2021-09-17
Applicant: Hitachi Astemo, Ltd.
Inventor： Takahiro ARAKI , Takeshi TOKUYAMA , Shigehisa AOYAGI , Noriyuki MAEKAWA
IPC: H01L23/367 , H02M7/00 , H01L23/498 , H01L23/00 , H01L23/522 , H05K1/02
CPC classification number: H01L23/3672 , H02M7/003 , H01L23/49822 , H01L24/40 , H01L23/5223 , H05K1/0231 , H01L2224/40137 , H01L2224/40265 , H01L2924/19041 , H01L2924/13055
Abstract: A power semiconductor device includes: a substrate in which a positive electrode wiring connected to a first conductor on a high potential side and a negative electrode wiring connected to a fourth conductor on a low potential side are provided on one surface, and an output wiring connected to a second conductor and a third conductor is provided on the other surface so as to face the positive electrode wiring and the negative electrode wiring; and a first capacitor that smooths DC power supplied to a first upper-arm circuit body and a first lower-arm circuit body. The substrate is disposed between the first upper-arm circuit body and the first lower-arm circuit body. The first capacitor is disposed between the first upper-arm circuit body and the first lower-arm circuit body, and is connected to the positive electrode wiring and the negative electrode wiring on the substrate.
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公开(公告)号：US20220029572A1
公开(公告)日：2022-01-27
申请号：US17421918
申请日：2019-08-19
Applicant: Hitachi Astemo, Ltd.
Inventor： Shigehisa AOYAGI , Toshiyuki AJIMA , Kotaro SHIINO
Abstract: An object of the present invention is to provide a power conversion device including a plurality of inverter circuits connected in parallel to a load, the power conversion device being capable of performing control with a smaller number of microcomputers, having high reliability, and being advantageous for miniaturization and cost reduction. Provided are: a plurality of inverter circuits connected in parallel to a load; a microcomputer which controls the plurality of inverter circuits; a plurality of signal selection units which select a drive signal of each of the plurality of inverter circuits; and a first transmission path and a second transmission path which are connected in parallel between the microcomputer and the plurality of signal selection units and transmit the drive signal of each of the plurality of inverter circuits from the microcomputer to each of the plurality of signal selection units. Each of the plurality of signal selection units selects anyone of a first drive signal transmitted from the first transmission path and a second drive signal transmitted from the second transmission path.
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公开(公告)号：US20240322624A1
公开(公告)日：2024-09-26
申请号：US18578273
申请日：2022-02-08
Applicant: HITACHI ASTEMO, LTD.
Inventor： Ryouichi TAKAHATA , Shigehisa AOYAGI , Noriyuki MAEKAWA , Daisuke SATOU , Ryuuichirou IWANO
Abstract: A rotating electric machine includes a shaft connected to a rotor, and a facing member fixed to the shaft and facing an end surface of the rotor via a space. The shaft includes an inner flow path through which a refrigerant flows, and a communication hole that allows the inner flow path to communicate with the space. The facing member includes first blade portions arranged along a circumferential direction. The first blade portion has a first inclined surface inclined with respect to a radial direction such that a distance to the end surface becomes shorter from the inner side in the radial direction toward the outer side in the radial direction. The first inclined surface comes into contact with a refrigerant sprayed from the inner flow path through the communication hole by rotation of the shaft, and sprays the refrigerant toward a coil end.
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公开(公告)号：US20230402904A1
公开(公告)日：2023-12-14
申请号：US18033916
申请日：2021-09-09
Applicant: Hitachi Astemo, Ltd.
Inventor： Takaki ITAYA , Noriyuki MAEKAWA , Hideaki GOTO , Shigehisa AOYAGI , Takashi HIRAO
Abstract: An object of the present invention is to provide an inverter integrated motor that can effectively cool a power module of an inverter portion. An inverter portion 120 is connected to a motor portion and includes a power module 121 that converts a DC power into an AC power, a first flow path forming body 221a that is provided between a motor and the power module 121 and forms a first flow path 221, and a second flow path forming body 222a that is disposed on a side opposite a side of the first flow path forming body 221a (side of the motor 110) over the power module 121 and forms a second flow path 222. The first flow path forming body 221a and second flow path forming body 222a are formed so that a flow rate of a refrigerant F1 flowing in the first flow path forming body 221a is greater than a flow rate of a refrigerant F2 flowing in the second flow path forming body 222a.
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公开(公告)号：US20240291417A1
公开(公告)日：2024-08-29
申请号：US18565657
申请日：2022-02-15
Applicant: HITACHI ASTEMO, LTD.
Inventor： Shigehisa AOYAGI , Takafumi HARA , Takaya TSUKAGOSHI
IPC: H02P27/08 , H02P23/14 , H02P25/026
CPC classification number: H02P27/085 , H02P23/14 , H02P25/026
Abstract: An inverter control device performs pulse width modulation by selecting one of a synchronous pulse control mode in which a frequency of a carrier wave used in the pulse width modulation is changed in accordance with a rotation speed of the motor and an asynchronous pulse control mode in which the frequency of the carrier wave is constant regardless of the rotation speed of the motor. At the time of switching from the asynchronous pulse control mode to the synchronous pulse control mode, the inverter control device changes a carrier reference phase that is a reference value of a phase of the carrier wave to a different value before and after the switching.
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公开(公告)号：US20240275297A1
公开(公告)日：2024-08-15
申请号：US18564819
申请日：2022-03-02
Applicant: Hitachi Astemo, Ltd.
Inventor： Takahiro ARAKI , Takeshi TOKUYAMA , Akihiro NAMBA , Shigehisa AOYAGI , Noriyuki MAEKAWA
Abstract: A power conversion device includes: an inverter circuit; an AC conductor; a magnetic sensor that t detects magnetism generated when an AC current flows; a first magnetic body and a second magnetic body that face each other with the AC conductor and the magnetic sensor interposed therebetween; and a first housing and a second housing that are formed by conductive members. The first housing covers one opening of a space located between the first magnetic body and the second magnetic body, the second housing covers the other opening of the space. The end of each of the first magnetic body and the second magnetic body is formed so that the distance to the first housing or the second housing is smaller than the thickness of each of the first magnetic body and the second magnetic body in the arraying direction thereof.
