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一种永磁同步电机变占空比电流滞环控制策略

DOI: 10.13334/j.0258-8013.pcsee.2015.18.024, PP. 4762-4770

Keywords: 占空比,电流滞环控制,开关周期,环宽,永磁同步电机

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Abstract:

电流滞环控制因其具有高动态性能且不需要任何负载参数的信息,是最简单的三相永磁同步电机驱动系统电流控制方法。然而,传统固定环宽的滞环控制方式存在开关频率不定、电流畸变程度大等缺点。该文提出一种新型变占空比电流滞环控制策略,当采用id=0方式控制时,可以实现开关频率恒定、电流畸变小和高效率。其中,一个开关周期内开通与关断时间可以通过瞬时相反电动势、交轴电感、滞环环宽和参考电流与实际电流的偏差来确定。此外,三相电枢绕组的电压与电流之间彼此独立。仿真和实验结果验证了所提控制策略的有效性。

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