US 11,870,326 B2
Electric drive apparatus, and electric power steering apparatus
Keiji Hamada, Isesaki (JP)
Assigned to HITACHI ASTEMO, LTD., Hitachinaka (JP)
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
Filed on May 20, 2022, as Appl. No. 17/750,093.
Application 17/750,093 is a continuation of application No. 16/725,029, filed on Dec. 23, 2019, granted, now 11,362,569.
Application 16/725,029 is a continuation of application No. 15/441,576, filed on Feb. 24, 2017, granted, now 10,554,100, issued on Feb. 4, 2020.
Claims priority of application No. 2016-110114 (JP), filed on Jun. 1, 2016.
Prior Publication US 2022/0278590 A1, Sep. 1, 2022
Int. Cl. H02K 9/22 (2006.01); H02K 11/33 (2016.01); H02K 5/18 (2006.01); H02K 9/02 (2006.01)
CPC H02K 9/02 (2013.01) [H02K 5/18 (2013.01); H02K 9/22 (2013.01); H02K 9/227 (2021.01); H02K 11/33 (2016.01)] 8 Claims
OG exemplary drawing
 
1. An electric drive apparatus comprising:
a motor housing configured to house an electric motor, wherein the electric motor includes a stator, a rotor, and a rotating shaft fixed to the rotor, and is configured to drive a controlled object of a mechanical system;
a permanent magnet provided at an axial end of a rotating shaft of the electric motor;
a board arranged to face the axial end of the rotating shaft, and provided with a first electrical component and a sensing part for sensing rotation of the rotating shaft in cooperation with the permanent magnet; and
a second electrical component;
wherein the motor housing includes an axial end part having an outer face facing away from the electric motor, wherein the outer face of the axial end part includes a step between a first level and a second level of the outer face of the axial end part such that the second level is higher in an axial direction of the motor housing than the first level;
the board is placed on the second level of the axial end part of the motor housing;
the second electrical component is placed on the first level of the axial end part of the motor housing and apart from the board such that the second electrical component is closer to the electric motor than the second level of the axial end part of the motor housing; and
the permanent magnet projects toward the board with respect to the first level of the axial end part of the motor housing.