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电压型PWM整流器的开关器件断路故障特征

, PP. 108-116

Keywords: PWM整流器,开关管断路故障,电流和电压畸变,故障诊断

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Abstract:

深入研究了在主回路开关管发生断路故障后,电压型PWM整流器的故障特征交流网侧故障电流和电压的波形畸变现象,并将之与常规的SVPWM逆变器进行了对比分析。文中通过对PWM整流器发生故障后的工作过程的分析,深入研究了电压型PWM整流器的双闭环控制方法对其上述故障特征的影响,继而对PWM整流器的直流输出功率以及交流电感量对其电流畸变的影响情况进行了分析研究。最后分析了PWM整流器特有的故障特征对其故障诊断过程的影响,并介绍了一种应用于大功率PWM整流器的主回路断路元件定位方法。

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