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基于无速度传感器的异步电机并权矢量控制

, PP. 131-137

Keywords: 无速度传感器,电机并联,负载不均衡,加权控制,平均转子磁链

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Abstract:

在工业和轨道交通领域,多电机协调控制已经得到了广泛的应用。为了解决单逆变器驱动并联异步电机在不平衡负载条件下运行的问题,本文实现了基于无速度传感器的加权矢量控制方法。本文对现有的并联加权控制方法进行改进,在负载不平衡时,根据易获得的电机转速实时计算出加权值。并联电机矢量控制的权重根据加权值进行实时调整,定子电流的d轴分量控制加权转子磁链,q轴分量控制加权转矩。电机的磁链和转速通过q轴磁链观测器观测得到。仿真和实验结果表明,加权矢量控制方法克服了平均转子磁场定向方法在负载不均衡较大时不能正常起动的缺点,同时对并联电机电流的不均衡度有所改善。

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