Huawei Digital Power Technologies Co., Ltd.

Wenwu Ma

Ke Wang

Lang Lv

Chao Cao

Zhiqi Wei

Jinsong Zhang

Yi Cao

Hu Zhong

Yang Cheng

Senlin Ma

Zhengyi Tang

Zhenxing Chen

Guoquan Yu

Shenghai Jiang

Guojie Xu

Maojie Ren

This application describes a motor that includes a housing, an output shaft, a conductive bearing, and a conductive component. The output shaft is disposed in the housing. A positioning hole is disposed on an end face of a first end of the output shaft, and the positioning hole is disposed coaxially with the output shaft. The conductive bearing is disposed in the positioning hole, and includes an inner ring, and an outer ring that is fixedly connected to the output shaft. One end of the conductive component is fixedly connected to the inner ring of the conductive bearing, and the other end is connected to the housing. In this application, the motor can output, by using the conductive bearing and the conductive component, charges accumulated in the output shaft, to eliminate a generated common-mode voltage.

Motor, powertrain, and vehicle

A control method and apparatus may be applied to an electric drive system. The electric drive system includes an oil pump, a motor, a reducer, and a housing, the motor and the reducer are disposed in the housing, lubricating oil is stored in the housing, and the oil pump is configured to pump the lubricating oil. The method includes: obtaining a first rotational speed of the motor, a second rotational speed of the oil pump, and a temperature of the lubricating oil in the housing; and controlling a rotational speed of the oil pump to be a third rotational speed based on the first rotational speed, the second rotational speed, and the temperature. In this way, the rotational speed of the oil pump can be adjusted to change liquid levels of the lubricating oil in a cavity and oil pump power at different rotational speeds of the oil pump.

Control method and apparatus

A motor includes a grounding ring and a first sealing piece, or includes a grounding ring, a first sealing piece, and a second sealing piece. The grounding ring is electrically coupled to a rotating shaft and a housing. The grounding ring is made of a material with good conduction performance, hence, a shaft induced voltage transmitted on the rotating shaft is transmitted to the housing through the grounding ring, instead of being transmitted to the housing through a motor bearing.

Motor, power assembly, and motor drive device

Embodiments of this application provide a motor rotor, a motor, and a vehicle. A conductive pillar passes through an inner ring of a conductive bearing, an outer wall of the conductive pillar interference fits with the inner ring of the conductive bearing, and an end of the conductive pillar is grounded. In this way, it is ensured that a shaft current on a rotor body is discharged by using the conductive bearing and the conductive pillar, to prevent a main bearing of the motor rotor from being electrically corroded by the shaft current. In addition, the conductive bearing is sleeved on the grounded conductive pillar, so that the inner ring of the conductive bearing can interference fit with the outer wall of the conductive pillar.

Motor rotor, motor, and vehicle

Growing community of inventors

Dongguan, China

Wenwu Ma