A three-phase symmetrical electrically excited doubly salient motor

Abstract

The invention discloses a three-phase symmetrical electric excitation double salient pole motor. The motor has a new configuration of stator and rotor poles, each excitation element is wound across four stator poles, and each stator coil of each phase stator winding The distribution positions are different, so that the magnetic flux path of each phase of the motor is consistent as a whole, and the number of rotor poles sliding in and out at acute angles and obtuse angles is equal, which solves the problem caused by the use of parallel tooth slotting in traditional electric excitation double salient pole motors due to the increased excitation slot area. The problem of asymmetrical contact between the stator and rotor poles, the flux linkage of the excitation winding is also relatively stable, and finally the three-phase complete symmetry of the doubly salient pole motor is realized. The invention does not need to adopt the left and right symmetrical pole shoe design of the stator poles in order to solve the asymmetrical contact of the traditional electric excitation double salient pole motor, which reduces the difficulty of the process. The three-phase symmetry of the electrically excited double salient pole motor proposed by the invention effectively solves the problems of large torque ripple, large voltage fluctuation and unbalanced current of the traditional three-phase electrically excited double salient pole motor, and has great practical significance.

Description

technical field [0001] The invention relates to the field of special motor body design, in particular to a three-phase symmetrical electric excitation double salient pole motor. Background technique [0002] In the 1990s, American scholars proposed the permanent magnet doubly salient motor, and the electric excitation doubly salient motor was developed on this basis. Electric excitation doubly salient motor rotor has the advantages of simple structure, no winding and permanent magnet, high temperature and high speed operation capability, and the windings of each phase on the stator are physically and electromagnetically independent, strong fault tolerance and high reliability, and has the advantages of electric excitation The synchronous motor has the advantages of simple power generation control and high reliability of the control circuit, and has broad application prospects in the fields of aerospace, automobiles, ships, and wind power generation. [0003] The traditional...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of large torque pulsation, large voltage fluctuation and unbalanced current caused by the inherent asymmetry of the phase magnetic circuit of the traditional three-phase electric excitation double salient pole motor, the present invention adopts the following technical solutions:

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