Composite excitation partitioned stator and rotor switched reluctance motor

Abstract

The invention discloses a composite excitation partitioned stator and rotor switched reluctance motor belonging to the field of switched reluctance motors. The motor can be in a three-phase 6 / 4, four-phase 8 / 6 or three-phase 12 / 8 structure and the like and comprises U-shaped stator blocks, excitation coils, magnet vanes, permanent magnets, segmental rotor tooth blocks and a non-magnetic conduction rotor metallic sheath, wherein the segmental rotor tooth blocks are embedded into the non-magnetic conduction rotor metallic sheath; one magnet vane is arranged between two adjacent U-shaped stator blocks; the permanent magnets are embedded between two stator tooth notches of each U-shaped stator block; the excitation coils are wound on the yokes of the U-shaped stator blocks; and the excitation field generated by each excitation coil wound on the yoke of each U-shaped stator block is in parallel connection with the permanent magnetic field generated by the permanent magnet embedded between two stator tooth notches of the U-shaped stator block. The motor of the invention has high torque, small wind resistance loss when the rotor operates at high speed, small end winding, strong fault tolerance and low production cost.

Description

technical field [0001] The invention relates to a motor, in particular to a hybrid excitation block stator and rotor switched reluctance motor, which belongs to the technical field of switched reluctance motors. Background technique [0002] The structure of the switched reluctance motor is simple and solid, low cost, reliable performance, flexible control, strong fault tolerance, and has the advantages of high temperature and high speed adaptability. However, the concave-convex rotor of the switched reluctance motor makes the wind resistance during high-speed operation very large, and the resistance during high-speed operation under oil cooling conditions is even greater. In order to reduce the wind (oil) resistance, the rotor injection method can be used, that is, the rotor is recessed. Partially filled with plastic, but this method is complex and costly to implement. The switched reluctance motor is a half-cycle output. How to further improve the motor efficiency and pow...

AI Technical Summary

Problems solved by technology

The above two kinds of hybrid excitation switched reluctance motors have special requirements for the direction of the permanent magnet magnetic field, so only some switched reluctance motors with a specific number of stator teeth can meet this requirement, and the permanent magnet magnetic field lines are interlinked with the non-conducting winding. The induced electromotive force will be generated in the winding, which will affect the performance of the motor

The above defects have affected the further application of these two structural motors

[0005] Chinese invention patent (Application No. 200910263110.6) proposes a hybrid excitation switched reluctance motor. The fan-shaped rotor tooth blocks of the motor are embedded in the non-magnetic rotor metal sleeve to form the rotor, and the permanent magnets are embedded in the C-shaped stator block. Between the slots of the two stator teeth, multiple C-shaped stator blocks are spaced apart to form a whole stator, but its excitation winding adopts FullyPitched winding, that is, each winding needs to span m stator teeth (m is the phase number of the motor) Winding, which makes the winding overlap at the end of the motor, the end winding is large, and the reliability is reduced, especially when the axial length of the motor is short, the utilization rate of copper is low

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