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基于电流预测控制的无刷直流电动机换相转矩脉动抑制

, PP. 22-29

Keywords: 无刷直流电动机,换相转矩脉动,电流预测控制

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Abstract:

为解决无刷直流电动机(brushlessDCmotor,BLDCM)换相转矩脉动的问题,提出基于电流预测控制的换相转矩脉动抑制方法。首先分析换相转矩脉动产生的原理;然后采用电流预测控制同PWM_ON导通方式相结合的控制策略,在换相期间对开通相和关断相同时进行PWM调制,控制开通相的电流上升斜率和关断相的电流下降斜率相等,保证非换相的相电流保持恒定,从而减小换相转矩脉动;最后搭建了实验平台。实验表明,所提出的算法可在全速度范围内明显减小换相转矩脉动,验证了所采取策略的有效性。

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