Electric oil pump

Abstract

An electric oil pump includes a motor, a pump, and a motor driver. The pump includes a pump rotor attached to the shaft, a pump body, and a pump cover. A motor driver includes an inverter circuit that controls driving of a motor and an inverter cover. The inverter circuit is in thermal contact with the pump cover.

1 - 15 . (canceled) 
     
     
         16 : An electric oil pump comprising:
 a motor including a shaft rotatable with respect to a central axis extending in an axial direction;   a pump that is positioned on a first side of the motor in the axial direction, is driven by the shaft extending from the motor, and discharges oil; and   a motor driver that is positioned on the first side of the motor in the axial direction via the pump and drives the motor; wherein   the motor includes:
 a rotor that is rotatable around the shaft; 
 a stator disposed on a side outward from the rotor in a radial direction; and 
 a housing that houses the rotor and the stator; 
   the pump includes:
 a pump rotor attached to the shaft; 
 a pump body including a recess that houses the pump rotor and includes a side wall surface and a bottom surface positioned on the second side of the motor in the axial direction, and an opening on the first side of the motor in the axial direction; and 
 a pump cover that closes the opening; 
   the motor driver includes:
 an inverter circuit that controls driving of the motor; and 
 an inverter cover that covers the inverter circuit; wherein 
 the inverter circuit is in thermal contact with the pump cover. 
   
     
     
         17 : The electric oil pump according to  claim 16 , wherein an inlet to take in the oil is provided at a position on the pump cover, and an outlet to discharge the oil is provided in the pump cover on a side opposite to the position of the inlet with respect to the center axis. 
     
     
         18 : The electric oil pump according to  claim 16 , wherein an inlet to take in the oil is provided at a position on the pump cover, a delivery port that communicates with the motor is provided in the bottom surface of the recess on a side opposite to the position of the inlet with respect to the center axis, and an outlet to discharge the oil is provided on a bottom surface or a side surface of the housing. 
     
     
         19 : The electric oil pump according to  claim 16 , wherein an inlet to take in the oil is provided at a position on the pump body, and an outlet to discharge the oil is provided in the pump body on a side opposite to the position of the inlet with respect to the center axis. 
     
     
         20 : The electric oil pump according to  claim 16 , wherein the pump cover is in thermal contact with the inverter circuit via a heat dissipation body. 
     
     
         21 : The electric oil pump according to  claim 17 , wherein the inverter circuit is disposed on an inlet side of the central axis. 
     
     
         22 : The electric oil pump according to  claim 16 , wherein the inverter circuit includes a circuit board and a heater, and the heater is in thermal contact with the inverter cover. 
     
     
         23 : The electric oil pump according to  claim 22 , wherein the heater of the inverter circuit is in thermal contact with the inverter cover via a heat dissipation body. 
     
     
         24 : The electric oil pump according to  claim 22 , wherein the heater of the inverter circuit is disposed on an inlet side of the central axis. 
     
     
         25 : The electric oil pump according to  claim 22 , wherein the heater of the inverter circuit includes a field effect transistor. 
     
     
         26 : The electric oil pump according to  claim 22 , wherein the circuit board of the inverter circuit is a copper-inlaid substrate. 
     
     
         27 : The electric oil pump according to  claim 22 , wherein the circuit board of the inverter circuit includes a plurality of substrates. 
     
     
         28 : The electric oil pump according to  claim 16 , wherein the pump body includes a bearing. 
     
     
         29 : The electric oil pump according to  claim 28 , wherein the bearing includes a ball bearing. 
     
     
         30 : The electric oil pump according to  claim 28 , wherein the bearing includes a sliding bearing.