METHOD AND DEVICE FOR MEASURING IMPEDANCE OF PERMANENT MAGNET SYNCHRONOUS MOTOR, AND PERMANENT MAGNET SYNCHRONOUS MOTOR

摘要

A method for measuring the impedance of a permanent magnet synchronous motor according to an exemplary embodiment of the present invention comprises the steps of: a) providing a stator of a stationary part of the permanent magnet synchronous motor with a measurement voltage having an electric angular velocity at which a rotating part is not caused to rotate; b) measuring a response current flowing to the stator while using the stationary phase of the rotating part which is stationary relative to the stationary part, step b) being performed in parallel with step a); c) finding the differential of the response current using a digital filter; and d) obtaining the inductance of the stator by inputting the response current and the differential of the response current to a converter that has been prepared in advance.