Patent ID: 9065369
Filing Date: 2015-06-23
Classification: F04D,H02P,Y02B

Abstract:
1. A motor driving device comprising: an inverter for driving a motor, the inverter having a plurality of switching elements; a first arithmetic section for calculating a rotational speed and a magnetic pole electrical angle of a motor rotor based on information about motor phase voltage and information about motor phase current; a driving command generating section for generating a sinusoidal wave driving command based on a difference between the rotational speed and a target rotational speed and the magnetic pole electrical angle; and a PWM signal generating section for generating a PWM control signal for controlling an ON/OFF state of the plurality of switching elements based on the sinusoidal wave driving command, wherein the first arithmetic section includes the first arithmetic section outputs a sum of the magnetic pole phase error and the integrated value as the magnetic pole electrical angle.