2026-10-25 Latest Published
By Xiaoting Ye
Xianhai Yu
Zirui Chen
Tao Zhang
Progress In Electromagnetics Research C, Vol. 174, 1-10, 2026
Abstract
To suppress high-order non-working harmonics in the air gap and improve the efficiency of the outer-rotor permanent-magnet brushless DC motor (OPMBLDC), this paper proposes a novel OPMBLDC design using cos-chamfering permanent magnets. First, based on air-gap field modulation theory, we design cos-chamfering permanent magnets. Second, a proxy optimization model of the no-load air-gap magnetic flux density and load torque is constructed by the finite element method and a regression model. Then, the multi-objective optimization design is carried out by the chaotic particle swarm algorithm (CPSO), and the performance indices of the OPMBLDC are compared and analyzed. Finally, the 80 W OPMBLDC with cos-chamfering permanent magnets is manufactured, and experimental results verify that the proposed OPMBLDC with cos-chamfering permanent magnets achieves effective suppression of high-order non-working air-gap harmonics and high efficiency.
