公开(公告)号：US20200186058A1

公开(公告)日：2020-06-11

申请号：US16703254

申请日：2019-12-04

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Junichi YUKAWA ,  Naoya IWASAKI ,  Hisazumi WATANABE ,  Yoshihiko MAEDA

IPC: H02P6/12 ,  H02P6/04 ,  H02P6/28 ,  B60L3/00

Abstract: A vehicle driving apparatus includes an inverter which drives a permanent magnet motor. The inverter includes a three-phase bridge circuit including a plurality of switch elements, a drive circuit connected to the three-phase bridge circuit, a control circuit connected to the drive circuit, and an abnormality detecting unit which detects abnormality of the inverter. The drive circuit includes a three-phase-short-circuit-forming circuit which causes three phases of the permanent magnet motor to form short circuits, an abnormality accepting terminal which accepts an abnormality signal output from the abnormality detecting unit, and a check terminal which accepts an active check signal for causing the three-phase-short-circuit-forming circuit to perform three-phase short circuit control.

公开(公告)号：US20230299667A1

公开(公告)日：2023-09-21

申请号：US18165722

申请日：2023-02-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hideki NAKATA ,  Atsushi SEKI ,  Junichi YUKAWA

IPC: H02M1/44 ,  H02M3/155 ,  B60R16/02 ,  G01R31/28

CPC classification number: H02M1/44 ,  H02M3/155 ,  B60R16/02 ,  G01R31/282

Abstract: A noise reduction device according to one embodiment includes a noise reduction circuit and a failure diagnosis circuit. The noise reduction circuit generates an offset signal with reverse polarity of a noise component generated in a load. The failure diagnosis circuit detects a level of the offset signal. The failure diagnosis circuit determines whether or not a detected level of the offset signal deviates from an appropriate range. The failure diagnosis circuit diagnoses, on the basis of a determination result, whether or not a failure has occurred in the noise reduction circuit.

公开(公告)号：US20220069699A1

公开(公告)日：2022-03-03

申请号：US17404229

申请日：2021-08-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Junichi YUKAWA ,  Zenyou TEI ,  Hiroyuki HANDA ,  Hideki NAKATA

IPC: H02M1/32 ,  H02M7/217

Abstract: A power converter according to the present disclosure includes a cooling plate and a plurality of circuit elements. The cooling plate includes a first cooling surface and a second cooling surface on an opposite side from the first cooling surface. The cooling plate is provided with a through hole passing through between the first and second cooling surfaces. The circuit elements convert AC power supplied from an external power source into DC power of a certain voltage and output the DC power. The circuit elements at least include first and second circuit elements. The first circuit element includes a first terminal and is thermally connected to the first cooling surface. The second circuit element includes a second terminal electrically connected to the first terminal and inserted into the through hole, and is thermally connected to the second cooling surface.