Fast calculation method of optimal flux‐barrier‐end position for torque ripple minimisation in SynRMs with and without PMs

Abstract

This study presents a simplified analytical model for synchronous reluctance machines (SynRMs) with and without permanent magnets (PMs) to rapidly investigate the influences of flux-barrier-end angles or salient poles angles on the torque ripple. With the proposed method, the optimal flux-barrier-end angles or salient poles angles can be computed directly to eliminate a specific torque harmonic. To further minimise two main low-order torque harmonics, a compensation strategy is adopted by choosing different optimised flux-barrier-end angles or salient poles angles in rotor adjacent poles. Moreover, two types of optimal combinations are evaluated and compared with transient finite element analysis. The results show the torque ripple can be significantly reduced in the optimised SynRMs with and without PMs and the average torque loss is acceptable. Finally, the prototype motor of five-phase SynRMs without PM is built and tested to validate the analyses.

Performance Comparison and Analysis of Different Rotor Structures of Vehicle Permanent Magnet Synchronous Flat Wire Motor

“…Under this background, how to decrease the vibration and noise of the motor becomes increasingly important. By optimizing the design of motor rotor structure, better motor output and vibration and noise performance can be achieved [3][4][5][6][7]. A comparative analysis of vibration and noise of different rotor structures has not been carried out in the existing literature [8,9], as many studies focus on the cause of radial force of specific rotor structures and lack the transverse comparison of different rotor structures.…”