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电力机车牵引电机在方波下的控制策略

, PP. 155-162

Keywords: 异步牵引电机,方波,矢量控制,弱磁,最大转矩控制,磁场定向校正

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Abstract:

在大功率交流电力机车牵引传动系统中,牵引电机在进入弱磁区之后通常要进入方波工况。方波下电机电压失去调节能力,使传统的矢量控制算法失效。本文中提出了一种基于电流开环控制的改进型矢量控制策略,使牵引电机在方波下仍然能够进行矢量控制;同时采用了一种改进型的电压控制器,保证了电机在弱磁区全速度范围内的最大转矩输出。最后利用电流开环控制的特点,提出了一种基于q轴电流误差的磁场定向校正策略,保证了方波下磁场定向角度的准确。仿真和实验结果证明了整个控制策略的有效性。

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