基于输入电流的牵引变流器开关管开路故障诊断方法

陈怡恬,陈特放,成庶,陈高华,王晗

Input Current-Based Diagnosis Scheme for Power Transistor Open-Circuit Faultin Traction Converter

Yitian Chen,Tefang Chen,Shu Cheng,Gaohua Chen,Han Wang

表4 故障诊断补充表

Tab.4 Fault diagnosis supplementary table

故障管周期 i3 i4 电流 T1 T2 T3 T4 T1 T2 T3 T4 正常 + 0 - 0 + 0 0 + VT4 0 0 - 0 + 0 0 + VT3 + 0 0 0 + 0 0 + VT1 + 0 - 0 + 0 0 + VT2 + 0 - 0 + 0 0 + VD2 + + 0 0 + 0 0 + VD1 0 0 - + + 0 0 + VT6 + 0 - 0 + 0 0 + VT5 + 0 - 0 + + + + VD4 + 0 - 0 + 0 0 + VD3 + 0 - 0 0 0 0 0