Current harmonic injection type vernier reluctance motor and system

Abstract

The invention discloses a current harmonic injection type vernier reluctance motor and system. The vernier reluctance motor body comprises a stator, a rotor and a winding. The stator and the rotor arein salient pole structures. The winding is a single-layer concentrated winding. Two sinusoidal alternating currents with different frequencies are injected into each phase of the winding. On the basis that the current in the winding is three-phase symmetrical current, two sinusoidal alternating current components with different frequencies in the winding are used to produce armature magnetomotiveforces with the same number of pole-pairs but different rotation speed. One magnetomotive force produce a space magnetic field with the same number of pole-pairs and the same rotation speed with theother armature magnetomotive force through the modulation of an air-gap flux guide, and a certain angle is between the space magnetic field and the other armature magnetomotive force. The magnetic field interacts with the other armature magnetomotive force to generate torque and realize electromechanical energy conversion. Compared with the prior art, the motor has the advantage that the current utilization ratio is increased by 11% compared with a direct current injection type vernier reluctance motor. In addition, the complexity of the controller part of the motor system is significantly reduced, and the cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of reluctance motors, and more specifically relates to a current harmonic injection type vernier reluctance motor and a system. Background technique [0002] Permanent magnet motors have the advantages of high power density and high efficiency, but the permanent magnets are expensive, the overall cost is high, and the permanent magnets have the risk of demagnetization and difficulty in demagnetization under fault conditions. High requirements for cost control and high reliability are required. , or it is difficult to apply in harsh environments. Compared with permanent magnet motors, electric excitation motors have no risk of demagnetization, higher reliability and lower cost. Such as synchronous reluctance motors, switched reluctance motors, asynchronous motors, etc., have a wide range of applications. [0003] The synchronous reluctance motor control system is simple, but the stator windings are generall...

AI Technical Summary

Problems solved by technology

[0011] Aiming at the above defects or improvement needs of the prior art, the present invention provides a current harmonic injection type vernier reluctance motor and system, the purpose of which is to solve the problem of complex wiring structure controller of the existing DC current injection type vernier reluctance motor technical problem

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