高可靠双三相永磁同步电机的转矩优化设计

Torque Optimization Design of High Reliability Dual Three-Phase PMSM

针对双三相永磁同步电机(PMSM)的输出转矩提升问题,分析了3次谐波电流注入电机相电流和反电动势的控制原理,对驱动系统进行优化,调节3次谐波电流,解决2套绕组间的电流干扰问题。在最优相电流的基础上,提出了永磁体塑形方法,综合考虑定子齿槽效应、铁心饱和以及齿尖、极间漏磁,并得到最优的类正弦反电动势。类正弦电流与类正弦反电动势相互作用,电机的输出转矩提升了18.1%。通过有限元分析和样机试验验证了理论分析的正确性,为高可靠双三相PMSM的规模化应用提供了技术支撑。

Aiming at the problem of increasing the output torque of the dual three-phase permanent magnet synchronous motor(PMSM),the control principle of the 3rd harmonic current injection into the motor phase current and back electromotive force(EMF)is analyzed.The motor drive system is optimized,and the 3rd harmonic current is adjusted to solve current interference problem of two sets of windings.On the basis of the optimal phase current,a permanent magnet shaping method is proposed,which comprehensively considers the stator cogging effect,iron core saturation and magnetic leakage between tooth tips and poles,and the optimal quasi-sinusoidal back EMF is obtained.The output torque of the motor is increased by 18.1%due to the interaction of quasi-sinusoidal current and quasi-sinusoidal back EMF.Finally,the correctness of the theoretical derivation is verified through finite element analysis and experiments,which provides technical support for the large-scale application of high reliability dual three-phase PMSM.