关键词: 永磁辅助同步磁阻电机, 不对称磁障, 神经网络, 转矩脉动

Abstract: Aiming to reduce torque ripple in permanent magnet-assisted synchronous reluctance motors for new energy vehicles,this paper constructs a rotor topology with asymmetric magnetic barrier characteristics and uses an asymmetric barrier angle per pole to achieve torque ripple suppression. A parameterized electromechanical model of the motor is established, and key parameters significantly affecting torque ripple are screened through multi-parameter sensitivity analysis;subsequently, a neural network prediction model is constructed, and combined with the NSGA-II algorithm to
optimize a motor structure scheme with low torque ripple;by adjusting the deflection angle of the magnetic barrier angle,the rotor structure is further optimized to achieve secondary torque ripple suppression;finite element simulations are conducted to compare the suppression effects of symmetric and asymmetric magnetic barrier structures,the results show that the motor torque ripple is reduced to 2. 22%,from which it can be concluded that a rotor structure with asymmetric magnetic barriers can effectively reduce motor torque ripple.

Key words: permanent magnet-assisted synchronous reluctance motor, asymmetric magnetic barrier, neural network, torque ripple