公开(公告)号：US20240088813A1

公开(公告)日：2024-03-14

申请号：US18507399

申请日：2023-11-13

Applicant: DENSO CORPORATION

Inventor： Syusei NISHIMURA ,  Kazuhiro Shirakawa

IPC: H02P27/06 ,  H02K11/02 ,  H02K11/33

CPC classification number: H02P27/06 ,  H02K11/02 ,  H02K11/33

Abstract: An inverter in a power conversion apparatus has a series connection body of upper- and lower-arm switches. The series connection body connects in parallel to a series connection body of first and second power storage units. A rotating electric machine has a winding that is electrically connected to the inverter. A neutral-point wiring electrically connects a negative electrode side of the first power storage unit and a positive electrode side of the second power storage unit, and a neutral point of the winding. A control unit performs switching control of the upper- and lower-arm switches such that a current flows between the first power storage unit and the second power storage unit through the inverter, the winding, and the neutral-point wiring. A case houses at least the inverter and provides a shield function. At least a portion of the neutral-point wiring is housed inside the case.

公开(公告)号：US20220231619A1

公开(公告)日：2022-07-21

申请号：US17712540

申请日：2022-04-04

Applicant: DENSO CORPORATION

Inventor： Seiji IYASU ,  Syusei NISHIMURA ,  Atsushi FUKAYA

IPC: H02M7/5387 ,  H02P27/06 ,  H02M1/08 ,  H03K17/082

Abstract: A power converter includes a connection path electrically connecting a negative side of a first rechargeable battery, a positive side of a second rechargeable battery electrically connected in series with the first rechargeable battery, and a neutral point of windings of a rotating electric machine. The power converter further includes a control unit configured to perform switching control of an upper-arm switch and a lower-arm switch for each phase in order to transfer energy between the first and second rechargeable batteries by conducting current between the first and second rechargeable batteries via an inverter, the windings, and the connection path.

公开(公告)号：US20230327596A1

公开(公告)日：2023-10-12

申请号：US18200216

申请日：2023-05-22

Applicant: DENSO CORPORATION

Inventor： Syusei NISHIMURA ,  Masahito FUJIEDA ,  Keiya TANI

IPC: H02P27/06 ,  H02M7/537 ,  H02J7/00 ,  B60L50/51

CPC classification number: H02P27/06 ,  B60L50/51 ,  H02J7/0013 ,  H02M7/537 ,  B60L2200/10 ,  B60L2200/32 ,  H02J7/0048

Abstract: A power conversion apparatus includes a rotating electrical machine equipped with star-connected windings and an inverter equipped with series-connected units made up of upper arm switches and lower arm switches. The power conversion apparatus also includes a connecting path which electrically connects a negative terminal of a first electrical storage, a positive terminal of a second electrical storage connected in series with the first electrical storage, and a neutral point of the windings together, a connecting switch which is disposed in the connecting path, and a determiner which works to determine whether the connecting switch is required to be turned on, and a controller which turns on the connecting switch when it is determined by the determiner that the connecting switch is required to be turned on to execute a switching control operation on the upper arm switches and the lower arm switches.