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|1. (WO2018159471) PUMP DEVICE|
|Applicants:||NIDEC TOSOK CORPORATION
This pump device 1 comprises a motor unit 10 having a shaft 5 arranged along a central axis J extending in the axial direction, a pump unit 30 which is positioned to one side in the axial direction of the motor unit 10 and which is driven by the motor unit 10 through the shaft 5 and discharges oil, and an inverter circuit 50 which is positioned radially outwards of the motor unit 10. The motor unit 10 comprises a rotor 11 which can rotate around the shaft 5, a stator 15 which is arranged opposite of the rotor 11, and a housing 21 which houses the rotor 11 and the stator 15. The housing 21 has a heat sink 60 on the outside surface, the heat sink 60 has a first flow path 61 that passes oil pumped from the pump unit 30, and the inverter circuit 50 is in thermal contact with the heat sink 60.