Abstract: A phase current integration method for diagnosing a fault in a switched reluctance motor power converter determines whether the main switch of a switched reluctance motor power converter is experiencing a short circuit or an open circuit fault by measuring a phase current io(t) transient value of said converter in a non-fault state as well as a present phase current i(t) transient value of said converter, so as to obtain, by an integration operation, an integration value SnO of a phase current during a certain period under the non-fault state, and an integration value Sn of a phase current during a certain period under a present state, the ratio En of the two values indicating a fault characteristic value.

Abstract: A phase current integration method for diagnosing a fault in a switched reluctance motor power converter determines whether the main switch of a switched reluctance motor power converter is experiencing a short circuit or an open circuit fault by measuring a phase current io(t) transient value of said converter in a non-fault state as well as a present phase current i(t) transient value of said converter, so as to obtain, by an integration operation, an integration value SnO of a phase current during a certain period under the non-fault state, and an integration value Sn of a phase current during a certain period under a present state, the ratio En of the two values indicating a fault characteristic value.

Abstract: A bus current-based short circuit fault diagnosing method for the power converter of a switched reluctance motor, which, by detecting the transient value of bus current in the power converter of a switched reluctance motor, calculates the mean value ? of maximum wavelet transform coefficient corresponding to bus current under different scale parameters and takes the mean value as a fault characteristic quantity, and utilizes a curve of mean value ? of maximum wavelet transform coefficient corresponding to bus current in the power converter of the switched reluctance motor under different scale parameters in the entire range of rotation speed to diagnose whether there is a short circuit fault in the position main switches of the power converter of the switched reluctance motor.