Patent ID: 9166519
Filing Date: 2015-10-20
Classification: H02P

Abstract:
1. A motor control device, comprising: a frequency instruction setting section for sequentially outputting a plurality of frequency instructions having different frequencies; an AC voltage instruction generation section for generating and outputting a plurality of AC voltage instructions based on the plurality of frequency instructions; a voltage application section for applying AC voltage to a motor based on the plurality of AC voltage instructions; a current detection section for detecting a plurality of motor currents flowing in the motor in response to the plurality of AC voltage instructions; and a type determination section for determining the type of the motor, wherein the type determination section calculates a ratio between the magnitude of the motor current and the magnitude of the AC voltage instruction according to each of the plurality of frequency instructions, and determines the type of the motor based on change in the calculated ratios based on the plurality of frequency instructions having the different frequencies.