Method for extracting stray inductance of power converter of switched reluctance motor

The invention provides a method for extracting the stray inductance of a power converter of a switched reluctance motor. The method comprises the steps of switching on and switching off the same main switch of the power converter of the switched reluctance motor twice, detecting the current value I1 of the main switch when the first switch-off starts and a first voltage spike value U1 that the main switch bears after the first switch-off, detecting the current value I2 of the main switch when the second switch-off starts and a first voltage spike value U1 that the main switch bears after the second switch-off, and then calculating the stray inductance L of the power converter of the switched reluctance motor. The method for extracting the stray inductance of the power converter of the switched reluctance motor has the advantages that testing is realized in the on-load operation process of the power converter, and no current change rate needs to be tested so that the test difficulty can be reduced; the method has excellent engineering application value for the laminated busbar design of the power converter of the switched reluctance motor.