Influence of different rotor magnetic circuit structure on the performance of permanent magnet synchronous motor

Abstract

Abstract:In order to compare the performance difference of the permanent magnet synchronous motors (PMSM) with different rotor structure, two kinds of rotor magnetic circuit structure with surface-mounted radial excitation and tangential excitation are designed respectively. By comparing and analyzing the results, the difference of the motor performance was determined. Firstly, based on the finite element method (FEM), the motor electromagnetic field performance was studied, and the magnetic field distribution of the different magnetic circuit structure was obtained. The influence mechanism of the different magnetic circuit structure on the air gap flux density was obtained by using the Fourier theory. Secondly, the cogging torque, output torque and overload capacity of the PMSM with different rotor structure were studied. The effect mechanism of the different rotor structure on the motor output property difference was obtained. The motor prototype with two kinds of rotor structure was manufactured, and the experimental study was carried out. By comparing the experimental data and simulation data, the correctness of the research is verified. This paper lays a foundation for the research on the performance of the PMSM with different magnetic circuit structure.

Electromagnetic simulation of an external rotor PM hub motor power device for distributed driving electric vehicle

“…PM brushless direct current motor has a variety of magnetic circuit structures, which may be divided into radial and tangential magnetic circuit according to the direction of air gap flux, which also can be divided into a surface and interior magnetic circuit structure according to the PM installation position. 20,21 According to the performance index of hub motor, the multi-stage outer rotor surface-mount magnetic circuit structure is most suitable. The main sizes of PM brushless direct current motor are the stator core diameter D a and the stator core length L. In this paper, the determination of main size of hub motor by integrated stator crack ratio method, electromagnetic load determination method and viscous damping coefficient method.…”

Archives of Electrical Engineering

“…The radial flux brushless AC interior permanent magnet (IPM) motor presented in this paper was designed for propulsion drives in electric vehicles (EVs) [1][2][3][4][5]. The IPM motor was designed for distributed drive electric vehicles in which the chassis of the EV consists of a front-and rear-wheel independent drive type, with an arrangement of PM synchronous motors for driving the rear and front wheels [6][7][8].…”