US 12,249,878 B2
Electric drive with arc shaped busbar connected to terminal of smoothing capacitor
Takayuki Sato, Aki-gun (JP); and Masashi Hayashiguchi, Kyoto (JP)
Assigned to MAZDA MOTOR CORPORATION, Hiroshima (JP); and ROHM CO., LTD., Kyoto (JP)
Filed by Mazda Motor Corporation, Hiroshima (JP); and Rohm Co., Ltd., Kyoto (JP)
Filed on Oct. 21, 2022, as Appl. No. 17/971,435.
Claims priority of application No. 2021-178237 (JP), filed on Oct. 29, 2021.
Prior Publication US 2023/0138904 A1, May 4, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02K 11/33 (2016.01); H02J 7/00 (2006.01); H02K 3/52 (2006.01); H02M 7/5387 (2007.01); B60K 6/26 (2007.10)
CPC H02K 11/33 (2016.01) [H02J 7/0013 (2013.01); H02J 7/0063 (2013.01); H02K 3/522 (2013.01); H02M 7/5387 (2013.01); B60K 6/26 (2013.01); B60Y 2200/92 (2013.01); H02K 2203/09 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electric drive unit including a motor and an inverter disposed adjacent to one end of the motor in a rotational axis direction,
wherein the inverter includes:
a plurality of power modules each of which includes at least one switching element, the plurality of power modules constituting an inverter circuit configured to convert direct-current power into alternating-current power;
a smoothing capacitor that constitutes, together with the plurality of power modules, the inverter circuit;
a busbar that connects each of the power modules to the smoothing capacitor; and
a thin case that has a thickness of less than 50 mm in the rotational axis direction and that accommodates the power modules, the smoothing capacitor, and the busbar,
wherein the plurality of power modules are disposed at a periphery of the smoothing capacitor, and the smoothing capacitor and each of the power modules are disposed in an inner portion of the thin case and arranged on a same plane orthogonal to the rotational axis direction, and
wherein the busbar is formed to extend in a circumferential direction, and an inner edge portion of the busbar connected to a terminal of the smoothing capacitor has an arc shape or a circular shape extending in the circumferential direction.