Four-phase sine wave electro-magnetic doubly salient motor

Abstract

The invention discloses a four-phase sine wave electro-magnetic doubly salient motor which comprises a stator iron core and a rotor iron core which share the same rotating shaft. The motor is of an 8N / 6N pole structure, wherein a stator and a rotor of the motor are both of a salient pole tooth groove structure, the pole arc coefficient of the rotor is 0.5, and the pole arc length of the stator isequal to or slightly larger than half of the pole arc length of the rotor. An armature winding and an exciting winding are embedded in the stator slot; an armature coil is wound on each stator pole, each magnet exciting coil is wound across the four stator poles, windings with different distribution positions and phase differences of 180 degrees in the armature coils are combined, and four-phase windings with the same flux linkage change rate of each phase are formed through reverse series connection, so that four-phase counter electromotive force symmetry is realized. The rotor is of a five-section stepped structure or a skewed pole structure, and the skewed pole number is the difference between the rotor pole angle and the stator pole angle; and the rotor pole is chamfered to improve thesine degree of the counter electromotive force of the motor. In the rotating process of the motor, the rotor induces sinusoidal winding counter electromotive force waveforms in the stator armature windings of the turn chain, the problem that square wave control torque pulsation of a traditional electrically excited doubly salient motor is large is effectively solved, four phases can be powered onand work at the same time, the winding utilization rate of the motor is increased, and the fault tolerance performance of the motor is good.

Description

technical field [0001] The invention relates to the field of special motor body design, in particular to a four-phase sine wave electric excitation double salient pole motor. Background technique [0002] The electric excitation double salient pole motor has a switched reluctance motor with a simple rotor structure, no windings and permanent magnets, high temperature and high speed operation capabilities, and the windings of each phase on the stator are physically and electromagnetically independent, with strong fault tolerance and high reliability. It also has the advantages of simple electric excitation synchronous motor power generation control and high reliability of the control circuit, and has broad application prospects in the fields of aviation, automobiles, ships, and wind power generation. [0003] However, as a kind of reluctance motor, the electrically excited doubly salient motor has an inherent defect - the problem of large torque ripple, which has become the b...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the present invention aims to propose a four-phase sine wave electric excitation double salient pole motor, so that the output back EMF of the double salient pole motor is sinusoidal, and by solving the problem that the four-phase electric excitation double salient pole motor exists The problem caused by the inherent asymmetry of the magnetic circuit of each phase improves the sine degree of the sinusoidal motor and effectively reduces the torque ripple of the electric excitation double salient motor as the driving motor

Images