Patent ID: 8963459
Filing Date: 2015-02-24
Classification: H02P

Abstract:
1. A method of driving an alternating-current (AC) motor, the method comprising: (a) driving the AC motor by a d (b) obtaining a rotator angle by a d wherein operation (b) comprises: (b1) obtaining difference values between current variations corresponding to the applied voltages and difference values between the applied voltages; and (b2) obtaining the rotator angle in the control injection period by using a matrix equation according to an inductance matrix of the AC motor, a voltage matrix including the voltage difference values, and a current matrix including the current variation difference values, wherein, in operation (a), the AC motor is driven by the d wherein, in the control injection period of operation (b1), a difference value v wherein operation (b2) comprises: (b2-1) obtaining 4 matrix variables L (b2-2) obtaining a rotator angle in a current control injection period by using the 4 matrix variables L