Built-in permanent magnet steel hub driving motor of electric vehicle

Abstract

The invention provides a built-in permanent magnet steel hub driving motor of an electric vehicle and belongs to the technical field of automobile motor electric appliances. The built-in permanent magnet steel hub driving motor of the electric vehicle consists of a front end cover, a rear end cover, a hub casing, a rotor, a stator, a stator support and a shaft. Two pieces of completely-identical rectangular permanent magnet steel are respectively placed in two rectangular grooves forming a shape of a regular Chinese character 'ba' of a rotor iron core to form an N-pole, the other two pieces of completely-identical rectangular permanent magnet steel are respectively placed in a regular Chinese character 'ba' shaped groove formed by the other two adjacent rectangular grooves of the rotor iron core to form an S-pole, the rest can be done in the same manner to form the permanent magnet rotor with N-poles and S-poles arranged at intervals, the structure is a rotor magnetic bypass structure and can effectively prevent the permanent magnet steel from producing irreversible demagnetization under the armature reaction effect of impact current, and excitation loss of the permanent magnet steel is ensured. A rotor magnetic field of the hub driving motor is provided by the permanent magnet steel without electro-magnetic windings, electric energy consumption is low, carbon brushes and mechanical commutators are not adopted, and the failure rate is low.

Description

technical field [0001] The invention provides a permanent magnet steel wheel hub drive motor embedded in an electric vehicle, which belongs to the technical field of automobile motors and electrical appliances. Background technique [0002] At present, most of the driving motors used with electric vehicles are DC motors with carbon brushes and mechanical commutators. Although DC motors have simple structure, high controllability, wide speed range, relatively simple control circuit, and low cost, but Since the magnetic field of the DC drive motor is generated by the electric excitation winding, the power consumption is large and the output power is small. In addition, due to the existence of carbon brushes and mechanical commutators, it not only limits the improvement of the overload capacity and speed of the drive motor, but also if it runs for a long time, it is bound to Frequent maintenance and replacement of carbon brushes and commutators is required, so the DC motor cons...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the driving motors used with electric vehicles are DC motors with carbon brushes and mechanical commutators. Although DC motors have simple structure, high controllability, wide speed range, relatively simple control circuit, and low cost, but Since the magnetic field of the DC drive motor is generated by the electric excitation winding, the power consumption is large and the output power is small. In addition, due to the existence of carbon brushes and mechanical commutators, it not only limits the improvement of the overload capacity and speed of the drive motor, but also if it runs for a long time, it is bound to Frequent maintenance and replacement of carbon brushes and commutators is required, so the DC motor consumes a lot of energy and has a high failure rate, and its performance needs to be further improved

Images