US 12,034,390 B2
Winding switching device of rotating electric machine, rotating electric machine drive system, and electric device
Shinji Sugimoto, Tokyo (JP); Akeshi Takahashi, Tokyo (JP); and Kazuo Nishihama, Tokyo (JP)
Assigned to HITACHI, LTD., Tokyo (JP)
Appl. No. 17/598,067
Filed by Hitachi, Ltd., Tokyo (JP)
PCT Filed Mar. 23, 2020, PCT No. PCT/JP2020/012604
§ 371(c)(1), (2) Date Sep. 24, 2021,
PCT Pub. No. WO2020/196365, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-055988 (JP), filed on Mar. 25, 2019.
Prior Publication US 2022/0224270 A1, Jul. 14, 2022
Int. Cl. H02K 3/28 (2006.01); H02P 25/18 (2006.01); H02P 27/06 (2006.01); H02P 21/18 (2016.01)
CPC H02P 25/18 (2013.01) [H02K 3/28 (2013.01); H02P 27/06 (2013.01); H02P 21/18 (2016.02)] 9 Claims
OG exemplary drawing
 
1. A winding switching device for switching parallel connection and series connection of a plurality of windings of a rotating electric machine, comprising:
a plurality of electrodes that are connected to the plurality of windings and a power source, wherein the plurality of electrodes are arranged side by side in a predetermined direction at interval from each other;
a movable portion that is in contact with the plurality of electrodes and includes a plurality of conductor portions, wherein the plurality of conductor portions are arranged side by side in the predetermined direction in which the plurality of electrodes are lined up at the interval from each other; and
an actuator that slides the movable portion a distance from a first position to a second position along the predetermined direction in which the plurality of electrodes are lined up, wherein the distance is equal to the interval;
wherein, according to a contact state between the plurality of electrodes and the plurality of conductor portions,
the plurality of windings are connected in parallel at the first position, and the plurality of windings are connected in series at the second position,
the plurality of electrodes include:
a first electrode connected to a first phase winding of the rotating electric machine in the plurality of windings, and
a second electrode connected to a second phase winding of the rotating electric machine in the plurality of windings, and
the first electrode and the second electrode are adjacent to each other, and form a neutral point.