Brushless DC motor turn-to-turn short circuit fault diagnosis method and simulation device

The invention relates to the technical field of brushless direct current motor fault simulation, in particular to a brushless direct current motor turn-to-turn short circuit fault diagnosis method and a simulation device. According to the brushless direct current motor turn-to-turn short circuit fault diagnosis method, a motor control system of a brushless direct current motor is provided with a fault diagnosis circuit, and the fault diagnosis circuit is provided with a bus, a charging capacitor and a transformer; charging the charging capacitor to an ideal voltage in the non-fault section; obtaining the maximum increment voltage of the charging capacitor according to the winding signal of the brushless direct current motor; if the maximum increment voltage of the charging capacitor is greater than the fault indication voltage, the turn-to-turn short circuit fault occurs; calculating the number of turns of the winding with the turn-to-turn short circuit fault and the voltage of the charging capacitor when the