Electrically excited hub motor for electric vehicle

Abstract

The invention provides an electrically excited hub motor for an electric vehicle, and belongs to the technical field of electric vehicles. The electrically excited hub motor comprises stator cores, a rotor core, excitation windings, armature windings, stator fixing blocks, a bearing and a shaft, and is characterized in that the motor is of an outer rotor structure, the stator core is fixed on the shaft, and the rotor core is fixedly provided with a hub of the electric vehicle and used for driving the electric vehicle. The rotor core of the electrically excited hub motor is provided with 13 uniformly distributed convex rotor poles. The number of the fan-shaped stator cores is six, wherein each stator core is provided with two convex stator poles, and the stator cores are provided with non-magnetic-conducting stator fixing block therebetween; the outer side of each stator fixing blocks between the stator cores is provided with an armature groove, two ends of the same stator core are provided with an inside excitation groove and an outside excitation groove respectively, each outside excitation groove is embedded with the excitation winding and the armature winding, and each inside excitation groove is embedded with the excitation winding. According to the technology provided by the invention, four-phase inductance and an electromotive force are in sinusoidal variation at any moment, and commutation torque ripples can be effectively reduced.

Description

technical field [0001] The invention relates to an electrically excited wheel hub motor of an electric vehicle, which belongs to the technical field of electric vehicles. Background technique [0002] In recent years, research on reluctance motors has made great progress, and its research results have also been applied to electric vehicle drive systems, among which switched reluctance motors are widely used in the field of electric vehicles. The switched reluctance motor has a simple structure and is sturdy and durable. There are no windings, magnets or slip rings on the rotor. It has high efficiency and a wide speed range. It is suitable for high-speed operation and is easy to realize four-quadrant control. However, the biggest disadvantage of the switched reluctance motor is that the torque ripple is large, the noise is large, the position sensor is required, and the system has nonlinear characteristics. [0003] On the basis of the switched reluctance motor, the excitati...

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Problems solved by technology

With the deepening of the research, the inventor found that the technology proposed in the early stage still has a large commutation torque ripple, so it is urgent to study an electric vehicle motor with a small commutation torque ripple

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