Design and Magnetic Noise Reduction of the Surface Permanent Magnet Synchronous Machine Using Complex Air-Gap Permeance

TLDR

Developing electric motorization for land vehicles is essential to save energy. The paper develops a tool for optimal acoustic and electromechanical modeling that offers highly accurate calculations and faster resolution than standard analytical and FE models. The hybrid model couples an analytical model with static FE simulations to compute complex global air‑gap permeance per area unit, accounting for magnetic wedge permeability, preslot height, and rotor shape. The hybrid model achieves unparalleled precision and speed in computing air‑gap magnetic pressures, and its predictions agree with acoustic measurements across different speeds in a concentrated winding motor.

Abstract

Nowadays, developing electric motorization for land vehicles is essential owing to the crucial need to save energy. This paper presents the development of a tool used in optimal acoustic and electromechanical modeling whose highly accurate calculations and speed of resolution make it stand out from standard analytical and finite element (FE) models. By coupling an analytical model with static FE simulations, our hybrid model calculates a complex global air-gap permeance per area unit, to take into account magnetic wedge permeability, preslot height, and rotor shape. An unparalleled level of precision and speed of resolution is obtained for the computation of air-gap magnetic pressures. Several results of comparisons between acoustic measurements and simulations on a concentrated winding motor for different speeds are presented.