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ji yu dian ya kong jian shi liang kong zhi pmsm xi tong xin xing si qu bu chang fang fa
Author(s): 
Pages: 114-119
Year: Issue:  8
Journal: Transactions of China Electrotechnical Society

Keyword:  Voltage space vectorpermanent magnet synchronous motor(PMSM)dead-time effectdisturbance voltage;
Abstract: 针对逆变器死区效应产生的扰动误差电压,提出一种简单有效的死区扰动电压观测器。该观测器借助于电机转子机械响应滞后于电磁响应的特性,在一个电流采样周期内转子位置保持不变,简化电机动态电压方程,建立同步旋转坐标系中电流Δied、Δieq的变化量与定子侧电动势变化量的关系,从而确定死区扰动补偿电压,实现对死区效应的校正。该补偿算法不需要检测电流方向,避免了相电流过零钳位造成的电流方向检测不准而引起的误差。仿真与实验结果表明,该观测器对永磁同步电机调速系统的死区补偿效果明显,转矩脉动小,电流波形畸变得到明显改善。
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