A four-phase doubly-fed excitation synchronous motor

Abstract

The invention relates to a four-phase doubly-fed excitation synchronous motor, which comprises a stator and a rotor arranged on the same rotating shaft, wherein 4N stator poles are arranged on the stator, 5N rotor poles are arranged on the rotor, N is a positive integer, each stator pole is wound with a set of armature windings and a set of excitation windings, and the excitation windings and thearmature windings are centralized windings. Compared with the prior art, the double salient pole structure adopted by the invention is simpler, the electric angle occupied by the electromotive force waveform can be 180 degrees under the proper stator-rotor pole arc coefficient, the four-phase winding outputs electric energy to the load at the same time, and the fault tolerance is stronger. At thesame time, the structure of centralized excitation is adopted, the positioning torque is small, and there is no unbalanced electromagnetic force, which improves the reliability of the motor operation.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a four-phase double-fed excitation synchronous motor. Background technique [0002] The electrically excited doubly salient motor is developed on the basis of the switched reluctance motor, which retains the advantages of the switched reluctance motor's simple rotor structure, low cost and convenient magnetic adjustment. The electric excitation double salient pole motor has the following specific characteristics: 1. DC excitation, no permanent magnet, so the cost is low, because there is no permanent magnet, so there is no problem of demagnetization; 2. There is no armature winding or excitation winding on the rotor, and the rotor is composed of It is made of laminated silicon steel sheets, without coils and magnetic steel, and has a simple and firm structure; 3. All the armature windings and field windings of the electric excitation double salient pole motor ...

AI Technical Summary

Problems solved by technology

[0003] However, the excitation of current doubly salient pole electric excitation motors generally adopts distributed excitation, and the excitation windings are wound on the stator poles of multiple doubly salient pole motors, which has the problem of asymmetric phase magnetic circuit, which will lead to loss of motor armature windings And the problem of uneven distribution of rectifier bridge loss, at the same time, it also increases the motor rectifier output voltage pulsation

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