Back to results
US 2019/0376511 A1Published application
Electric oil pump
AssigneeNidec Tosok Corporation
InventorsYoshiyuki KOBAYASHI, Takamitsu ETO, Shigehiro KATAOKA, Hirotaka KANAMONO
Life of this patent
Estimating the term…
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.
Claims16
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.
19 more elements
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.