Hub motor stator water cooling structure for electric motor vehicle

Abstract

The invention discloses a hub motor stator water cooling structure for an electric motor vehicle. On the basis of maintaining the original structure of a motor, a cooling water path structure is arranged on the motor stator to achieve cooling and heat dissipation of the motor. The water cooling structure comprises a cooling liquid inlet channel, an outlet channel, a water inlet loop and a water outlet loop which are arranged at a motor stator shaft, and a cold water channel, a hot water channel, a cooling water channel, an arc groove and an arc groove cover which are arranged at a motor statoryoke. The cooling liquid flows in from the inlet channel, is split by the inlet channel to flow through the cold water channel, the cooling water channel and the hot water channel in order to converge through the water outlet loop, and finally flows out from the outlet channel. The water cooling structure has multiple groups of uniformly distributed cooling cycle branches, is provided with a thermostat valve to regulate the flow of each cooling liquid cycle branch to make cooling more uniform so as to avoid the temperature gradient of the motor, make the cooling effect better, reduce the volume of the motor and meet the demands of lightweight of the vehicle.

Description

technical field [0001] The invention belongs to the technical field of hub motor manufacturing, and relates to a cooling structure of a hub motor, in particular to a stator water cooling structure of a hub motor for an electric vehicle. Background technique [0002] Energy and the environment are two important themes in the development of today's society. Under the background of energy shortage and environmental pollution, electric vehicles emerge as the times require. The distributed wheel hub motor drive method is adopted, and the independent electric wheel structure makes it easier to realize the steering by wire and all-wheel steering, which can effectively reduce the steering radius of the vehicle, and make the car have better maneuverability and flexibility. Compared with mechanical The steering mechanism greatly improves the steering performance of the vehicle. To realize the application of in-wheel motors, it is necessary to overcome its harsh working environment, a...

AI Technical Summary

Problems solved by technology

Excessive temperature will accelerate the aging of the insulation material inside the motor, and will also cause irreversible demagnetization of the permanent magnet material. The high temperature environment will greatly reduce the life of the motor

[0003] The traditional air-cooling method cannot meet the heat dissipation requirements of the hub motor at high speed and high load. Adding heat sinks and independent fans will increase the size of the motor, increase reactive power loss and noise, and make dynamic balance (or static balance) difficult. , complicated process and increased cost

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