A mixed excitation biconvex pole motor T

Abstract

he invention discloses a mixed excitation biconvex pole motor, including rotors, stators, three-phase armature windings and a case, wherein, the case is in magnetic conduction material, the rotor is composed of alveolar type core lamination, the stator fixed in the case includes 'U'-shaped cores arranged with interval between each other and permanent magnets provided between the 'U'-shaped cores and the case, the first permanent magnet charges magnetism tangentially along the circumference, N pole and S pole are arranged alternately, a second permanent magnet is provided between the 'U'-shapedcore base and the case, the second permanent magnet charges magnetism along the radius direction, N pole and S pole are arranged alternately, the three phase armature winding is a concentrated winding, winding on the armature teeth, the armature teeth are composed of adjacent two edges of two 'U'-shaped cores, the single-phase excitation is a concentrated winding, winding on the 'U'-shaped coreand the permanent magnet. In the inventive mixed excitation biconvex pole motor, the permanent magnet excitation and exciter winding electric excitation jointly combine an air-gap field to realize theadjustability of air-gap field, and simultaneously adopts magnetic conduction material as the case so that it can avoid the leakage of case outer edge, improves the motor anti-electromagnetic interference and electromagnetic compatibility, and improves utilization of permanent magnets.

Description

technical field [0001] The invention relates to a hybrid excitation doubly salient motor. Background technique [0002] Motors are the main drive components in modern industrial systems, and motors with excellent performance are crucial to the entire drive system. In recent years, with the development of power electronics technology, permanent magnet materials and microcomputer control technology, the permanent magnet brushless DC motor has developed rapidly. The permanent magnet brushless DC motor has the characteristics of high efficiency and high power density. With the high performance permanent magnet The advent of materials has greatly improved the power density and performance of permanent magnet brushless DC motors. On the other hand, switched reluctance motors are more and more widely used because of their simple structure and good reliability. The permanent magnet doubly salient motor combines the characteristics of the switched reluctance motor and the permanent...

AI Technical Summary

Problems solved by technology

[0003] However, the air-gap magnetic field of traditional permanent magnet doubly salient motors is mainly generated by the excitation of permanent magnets, which is difficult to adjust, which limits the operating speed range of the motor

In addition, there is serious magnetic flux leakage in the traditional permanent magnet double salient pole motor. On the one hand, the magnetic flux leakage leads to low utilization rate of permanent magnets, on the other hand, it also leads to electromagnetic interference and electromagnetic compatibility problems. At the same time, it also limits the use of non-magnetic material

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