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交流传动系统的混合型逆变器控制技术研究

, PP. 320-324

Keywords: 混合型逆变器,矢量控制,零序环流,谐波畸变率

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Abstract:

混合型逆变器由大容量低开关频率和小容量高开关频率的两个逆变模块并联组成。本文以混合型逆变器驱动的三相感应电机调速系统为对象,建立了混合型逆变器在同步坐标系下的数学模型,并与电机矢量控制相结合,研究了混合型逆变器的电流跟踪控制策略。仿真和实验结果表明,从逆变器实现了对部分负载电流、主逆变器产生的谐波电流和逆变器间零序环流的有效跟踪控制,使得混合型逆变器的容量得到灵活配置,电机侧谐波电流含量大大降低,而且传动系统具有较好的动态控制性能。

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