Patent ID: 8234879
Filing Date: 2012-08-07
Classification: F24F,F25B,Y02B

Abstract:
1. A motor controlling method of an air conditioner, comprising: estimating a velocity based on an output current flowing in a compressor motor; generating a current command value based on the estimated velocity and a velocity command value; generating a voltage command value based on the current command value and the output current; and generating a compressor inverter switching control signal based on the voltage command value; determining whether or not an operating frequency of the compressor motor is the same as or greater than a predetermined frequency; determining whether or not a detected velocity of an outdoor fan motor is the same as or lower than a predetermined velocity during a first time period; and temporarily stopping the compressor motor if the operating frequency is the same as or greater than the predetermined frequency and the detected velocity is lower than the predetermined velocity during the first time period.