Water-cooled hub motor

Abstract

The invention relates to a water-cooled hub motor for an electric automobile and is applicable to a water-cooled outer rotor hub motor of an electric automobile. The motor adopts a rotor assembly composed of an outer rotor and front and back end covers together. A motor stator part is composed of two parts, that is, a stator and a stator support. The stator support is composed of the front and back end covers and a support body which is provided with a circulating water jacket therein. The outer circle of the stator support is embedded into the inner bore of a stator core to form a stator assembly. The inner bore of the stator support is connected with a motor shaft. The motor shaft is processed to form a central hole, and is processed at the front end along the radial direction to form a plurality of holes, and the radial holes are in communication with the axial hole for leading out cables and cooling water pipes. The stator support is provided with a coolant inlet slot and a coolant outlet slot, and is processed in the radial direction to form a hole for mounting a coolant pipe. The coolant pipe is led out through the radial holes and the axial central hole. The water-cooled hub motor provided by the invention has the beneficial effects that by using the water cooling system, the heat dissipating capacity of the hub motor is improved, thus the output power and the torsion are substantially increased, and meanwhile, the motor is convenient to be integrated with a finished automobile.

Description

technical field [0001] The invention relates to a water-cooled hub motor for electric vehicles, belonging to the technical field of motors for electric vehicles. Background technique [0002] Electric vehicles include hybrid vehicles, fuel cell vehicles, pure electric vehicles, etc., which have the characteristics of energy saving and environmental protection, and are the development direction of the new generation of automobile technology. The electric vehicles currently being developed are generally formed by modifying the power transmission system in the traditional automobile chassis. For example, a hybrid vehicle is driven by adding a drive motor to the drive train and realizing power synthesis with the help of a power synthesizer. The fuel cell vehicle is the electric energy output by the fuel cell and the electric energy of the auxiliary energy to provide power for the drive motor to drive the vehicle. A pure electric vehicle uses a power battery to provide electric...

AI Technical Summary

Problems solved by technology

The wheel hub motor is the key assembly of this technology. Compared with the general electric vehicle drive motor, its working environment is harsh and requires a large driving torque, resulting in a large working current of the motor. Many wheel hubs developed at home and abroad are currently The motors are all air-cooled. Due to poor heat dissipation conditions, the output power and torque of the hub motors do not meet the requirements of the whole vehicle, which hinders the progress of the drive technology of the hub motors of electric vehicles.

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