MAGNETIC CIRCUIT CALCULATION AND FINITE ELEMENT METHOD ANALYSIS OF PERMANENT-MAGNET SYNCHRONOUS MOTOR WITH HYBRID MAGNETIC CIRCUIT STRUCTURE

摘要

The adoption of hybrid magnetic circuit structure in permanent-magnet synchronous motors can effectively increase the air-gap magnetic flux density, and then increase the power-to-volume ratio, finally realize the improvement of operating characteristics. On the basis of the special structure of the motor, its magnetic circuit is analysed. As a consequence, the equivalent magnetic circuit and the working drawing of magnet steel are obtained. Furthermore, the electromagnetic calculations to motor are made respectively by use of above method and the Finite Element Method, and their calculating results are compared each other.