Five-phase 5N/4N pole armature excitation dispersion-type fault-tolerant electro-magnetic double-salient motor

Abstract

The invention relates to a five-phase 5N / 4N pole armature excitation dispersion-type fault-tolerant electro-magnetic double-salient motor. Armature windings and excitation windings are alternatively distributed on stator poles of a stator, the armature windings and the excitation windings are not arranged on the same stator pole, the armature windings the excitation windings are physically isolated, turn-to-turn short circuit between the armature windings and the excitation windings is prevented, and the motor fault-tolerant performance is improved. The armature windings and the excitation windings are uniformly distributed on the stator pole, one end of each armature winding is led out to be connected, the other ends of the armature windings are connected between two diodes of a full-bridge circuit, the positions of the excitation windings are same as the positions of the armature windings, the output of each phase excitation winding is uniform, a symmetric phase magnetic path is generated, and electromagnetic balance is achieved. Moreover, the advantages of flux adjustment convenience, low cost and simple and reliable rotor structure of a traditional distributed excitation double-salient motor are maintained. The motor is relatively small in mutual inductance, relatively high in fault tolerance and symmetric in phase current.

Description

technical field [0001] The invention relates to a double salient pole motor, in particular to an electrically excited double salient pole motor. Background technique [0002] The doubly salient motor structure is a new type of motor that appeared in the 1990s. Compared with the traditional motor, there is no winding on the rotor of the doubly salient motor, and all the armature windings and field windings are concentrated on the stator. The simple structure makes it especially suitable for high-speed operation occasions. No position sensor and controllable power converter are required for power generation. The structure is simple and reliable, and its high reliability makes it an excellent quality aviation power supply. [0003] Based on the switched reluctance motor, a permanent magnet doubly salient motor is obtained, and the permanent magnet is used as the excitation source. From the permanent magnet double salient motor to the electric excitation double salient motor, t...

AI Technical Summary

Problems solved by technology

[0005] The excitation of traditional doubly salient electric excitation motors generally adopts distributed excitation. The excitation windings are wound on the stator poles of multiple doubly salient pole motors. There is a problem of phase magnetic circuit asymmetry, which will lead to loss of motor armature windings and rectification. The problem of uneven distribution of bridge losses

At the same time, it also increases the motor rectification output voltage pulsation of the motor

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