[关键词]
[摘要]
轮毂电机因结构简单、驱动灵活的特点广泛应用于轻型电动车辆。电机运行中存在的齿槽效应、逆变器非线性效应及电流谐波等问题,导致电机电磁转矩波动,影响车辆运行的平顺性。通过电磁转矩谐波分析发现其主要成分为低阶谐波。为了有效抑制低次转矩谐波,设计了一种附加三相独立定子绕组的轮毂电机结构,提出了基于电流幅值迭代整定的补偿电流注入方法,采用动态步长二分法实现期望补偿电流幅值的快速收敛。研究结果表明,所提方法可使总谐波失真降低2.80%~5.84%,具有良好的谐波转矩抑制效果。
[Key word]
[Abstract]
In-wheel motors are widely used in light electric vehicles due to its simple structure and flexible driving. The cogging effect, nonlinear problem of the inverter and harmonic current cause the ripple of electromagnetic torque, which affects the ride comfort of vehicles. It is found that electromagnetic torque harmonics are mainly low-order harmonics. In order to effectively minimize the torque ripple,an in-wheel motor structure with three-phase independent stator windings is designed,and a compensation current injection method based on current amplitude iteration tuning is proposed. By use of dynamic step dichotomy, the fast convergence of expected compensation current amplitude is realized. The research results show that the proposed method reduces the total harmonic distortion by 2.80%~ 5.84%, and has better harmonic torque suppression effects.
[中图分类号]
[基金项目]
浙江省自然科学基金项目(LQ17E070002)