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多逆变器并联的均流控制策略

, PP. 61-68

Keywords: 多逆变器并联,环流,不均流度,主从控制,脉冲延时补偿

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Abstract:

采用多逆变器并联系统是提高电机驱动功率的一种有效方法,但其存在环流和不均流问题。针对这些问题,建立了多逆变器并联系统的数学模型,提出了不均流度概念,建立了环流和不均流度的数学表达式,对引起环流和不均流现象的原因进行了分析,证明了环流产生的原因是并联逆变器输出电压不一致造成的。在上述分析的基础上,提出一种基于主从控制器的硬件电路结构,解决了并联系统存在的环流问题,并通过脉冲延时补偿解决了逆变器输出电流的不均流问题。实验结果验证了所提出方法的正确性。

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