CONTROL METHOD AND DEVICE - HUAWEI DIGITAL POWER TECH CO LTD

Title:

CONTROL METHOD AND DEVICE

Document Type and Number:

WIPO Patent Application WO/2022/141242

Kind Code:

A1

Abstract:

A control method and device, which relate to the field of control, and can be applied to an electric drive system. The electric drive system comprises an oil pump (401), a motor (402), a speed reducer (403), and a housing (404). The motor (402) and the speed reducer (403) are disposed in the housing (404); lubricating oil is stored in the housing (404); the oil pump (401) is used for pumping the lubricating oil. The method comprises: acquiring a first rotation speed of the motor (402), a second rotation speed of the oil pump (401), and the temperature of the lubricating oil in the housing (404); and according to the first rotation speed, the second rotation speed, and the temperature, controlling the rotation speed of the oil pump (401) to be a third rotation speed. In this way, the height of the lubricating oil in the housing (404) and the power of the oil pump at different rotation speeds of the oil pump can be changed by adjusting the rotation speed of the oil pump (401), thereby effectively improving the efficiency of an assembly.

Inventors:

MA WENWU (CN)
CAO YI (CN)
REN MAOJIE (CN)
ZHANG JINSONG (CN)

Application Number:

PCT/CN2020/141597

Publication Date:

July 07, 2022

Filing Date:

December 30, 2020

Export Citation:

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Assignee:

HUAWEI DIGITAL POWER TECH CO LTD (CN)

International Classes:

F16H57/04

Domestic Patent References:

WO2019244564A1

2019-12-26

Foreign References:

CN111089047A	2020-05-01
CN110219971A	2019-09-10
CN112020817A	2020-12-01
CN111442082A	2020-07-24
JP2009250415A	2009-10-29

Other References: