公开(公告)号：US20220337184A1

公开(公告)日：2022-10-20

申请号：US17642522

申请日：2020-08-14

Applicant: Hitachi Astemo, Ltd.

Inventor： Kazuo NISHIHAMA ,  Akeshi TAKAHASHI ,  Katsuhiro HOSHINO ,  Noriyuki MAEKAWA

IPC: H02P25/18 ,  H02K7/20 ,  H02P27/06 ,  H02P25/22

Abstract: An object of the present invention is to provide a winding switching device capable of enhancing the reliability of electrical contact between a movable unit and a fixed unit, and a rotating electrical machine drive system including such a winding switching device. A winding switching device switches a connection state of a plurality of windings, and includes a plurality of electrodes to which the plurality of windings are connected; a movable unit that includes a plurality of conductor portions in contact with the plurality of electrodes, and that is driven in a predetermined direction in which the plurality of electrodes are arranged; and a fixed unit including a regulating portion that regulates movement of the movable unit in the predetermined direction; where the connection states of the plurality of windings are switched according to the position of the movable unit; and when the movable unit moves in the predetermined direction, the plurality of conductors are displaced in a direction of moving away from the plurality of electrodes by the regulating portion.

公开(公告)号：US20220416709A1

公开(公告)日：2022-12-29

申请号：US17773908

申请日：2020-09-08

Applicant: Hitachi Astemo, Ltd.

Inventor： Akeshi TAKAHASHI ,  Kazuo NISHIHAMA ,  Noriyuki MAEKAWA ,  Katsuhiro HOSHINO

IPC: H02P27/08 ,  H02K3/28 ,  H02K11/33

Abstract: The present invention addresses the problem of providing a rotating machine drive system comprising a winding switching device, wherein the rotating machine drive system has a relatively simple configuration, allows wear of electrical contacts during switching and sliding to be minimized, and is highly reliable. The present invention is characterized in comprising a rotating machine having a plurality of windings, an inverter device for operating the rotating machine at variable speed, and a winding switching device for switching connection of the plurality of windings; the winding switching device having winding terminals, a semi-moving element having a short-circuit part that faces the winding terminals and also having a sliding part provided with first protrusions on the surface thereof opposite from the surface having the short-circuit part, and a moving element facing the sliding part of the semi-moving element and having a sliding part provided with second protrusions on the surface facing the sliding part of the semi-moving element; the moving element being made to slide relative to the semi-moving element, whereby the connection between the winding terminals and the short-circuit part is changed and the connection of the plurality of windings is switched.