关键词: 永磁电机；齿槽转矩；感应电动势；有限元法；定子开槽电机

Abstract: To address the problem of torque pulsation when the stator slotted motor is running, which makes the powertrain noise, vibration and harshness performance worse, this paper establishes a motor model with Maxwell, analyzes the magnetic field distribution of the isolated magnetic bridge using the finite element method, and analyzes the relationship between motor counter-electromotive force, cogging torque and rotational speed under different operating conditions. The results show that the isolated magnetic bridge can improve the magnetic field distribution and reduce the magnetic leakage. The electric potential is proportional to the motor speed, and the cogging torque does not change much with the increase of rotational speed, so the cogging torque of the 12-pole 72-slot motor is optimized at low speed using the segmented diagonal pole method at low rotational speed.

Key words: Magnet synchronous motor; Cogging torque; Induction electromotive force; Finite element method; Stator slotted motor