US 12,261,513 B2
Electric system for cooling a motor and inverter unit
Masanori Sawahata, Tokyo (JP); Masahiro Hori, Tokyo (JP); Hideaki Goto, Tokyo (JP); and Takeshi Tokuyama, Tokyo (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/917,509
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Jan. 29, 2021, PCT No. PCT/JP2021/003170
§ 371(c)(1), (2) Date Oct. 6, 2022,
PCT Pub. No. WO2021/210242, PCT Pub. Date Oct. 21, 2021.
Claims priority of application No. 2020-072497 (JP), filed on Apr. 14, 2020.
Prior Publication US 2023/0155453 A1, May 18, 2023
Int. Cl. H02K 3/50 (2006.01); H02K 7/116 (2006.01); H02K 9/193 (2006.01); H02K 11/33 (2016.01)
CPC H02K 9/193 (2013.01) [H02K 3/50 (2013.01); H02K 7/116 (2013.01); H02K 11/33 (2016.01); H02K 2203/09 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An electric system comprising:
a motor unit including a stator and a rotor, the motor unit being cooled by a refrigerant;
an inverter unit that supplies electric power to a winding of the stator;
a wiring portion that transmits electric power output from the inverter unit to the motor unit; and
a pipe that supplies or discharges the refrigerant to or from the motor unit, wherein
the wiring portion is provided at a position at which the wiring portion can exchange heat with an oil-containing medium cooled by the pipe,
the pipe has a protruding portion protruding from an outer surface of the pipe, and
the wiring portion is provided immediately below the protruding portion.