A MOTOR CONTROLLING METHOD FOR AIR-CONDITIONER BLOWER OF VEHICLE

摘要

PURPOSE: A method for controlling a blower motor installed in a vehicle conditioner is provided to guarantee the preciseness and reliability of motor speed control by primarily compensating an input voltage of an inverter and secondarily controlling the speed of a blower. CONSTITUTION: A method for controlling a blower motor installed in a vehicle conditioner includes the following steps. A DC-link voltage supplied to in inverter unit of the motor is measured by a DC-link voltage detection unit (S10). The DC-link voltage is compared to a reference voltage (S21). If there is a difference between the DC-link voltage and the reference voltage, a voltage compensating unit compensates a voltage (S22). A PWM control unit divides a PWM duty rate into sections to generate a speed command by section according to the PWM duty rate (S42). A commanded speed according to the speed command is compared to a sensing speed which is an actual speed of the motor and if they are not matched, the speed command of the PWM control unit is compensated (S53). [Reference numerals] (AA,DD) Within an acceptable range; (BB,CC) Out of an acceptable range; (S10) Measure a DC-Link voltage; (S21) Compare with a reference voltage; (S22) Compensation voltage = DC-Link voltage ± compensation value; (S23) DC-Link voltage ← compensation voltage; (S30) Generate a speed command regarding the DC-Link voltage; (S41) Check a PWM duty ratio; (S42) Generate the speed command by PWM duty ratio section; (S51) Sense a speed value; (S52) Compare the command speed and the sensed speed value; (S53) Compensate the speed command; (S60) Maintain the speed command