US 12,142,972 B2
Electric driving device and electric power steering device
Masakazu Morimoto, Tokyo (JP)
Assigned to NSK LTD., Tokyo (JP)
Appl. No. 17/802,256
Filed by NSK LTD., Tokyo (JP)
PCT Filed Feb. 10, 2022, PCT No. PCT/JP2022/005267
§ 371(c)(1), (2) Date Aug. 25, 2022,
PCT Pub. No. WO2022/172977, PCT Pub. Date Aug. 18, 2022.
Claims priority of application No. 2021-019895 (JP), filed on Feb. 10, 2021; application No. 2021-140657 (JP), filed on Aug. 31, 2021; application No. 2021-140808 (JP), filed on Aug. 31, 2021; and application No. 2022-004084 (JP), filed on Jan. 14, 2022.
Prior Publication US 2023/0081123 A1, Mar. 16, 2023
Int. Cl. H02K 11/33 (2016.01); H02K 5/18 (2006.01); H02K 5/22 (2006.01); H02K 11/215 (2016.01); B62D 5/04 (2006.01)
CPC H02K 11/33 (2016.01) [H02K 5/18 (2013.01); H02K 5/22 (2013.01); H02K 11/215 (2016.01); B62D 5/0406 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electric driving device comprising a motor and an electronic control unit configured to control rotation of the motor, wherein
the motor comprises:
a shaft extending from a load side to an anti-load side in an axial direction;
a motor rotor configured to synchronize with the shaft;
a motor stator comprising a motor coil and motor coil wiring for supplying electric power to the motor coil and configured to rotate the motor rotor;
a motor housing that accommodates the motor rotor and the motor stator; and
a magnet provided on the anti-load side of the shaft, and
the electronic control unit comprises:
a first circuit board provided with a transistor configured to output an electric current to excite the motor coil and a rotation angle sensor disposed on an extension of the axial direction of the shaft, the first circuit board being disposed on the anti-load side of the shaft;
a second circuit board comprising a control circuit configured to control an electric current supplied to the transistor;
a power supply wiring module configured by molding, with resin, a choke coil for noise removal, a capacitor, and wiring configured to supply electric power to at least one of the first circuit board and the second circuit board; and
a first heat sink sandwiched between the power supply wiring module and the second circuit board.