METHOD AND APPARATUS FOR CONTROLLING OUTPUT VOLTAGE OF INVERTER DRIVING MOTOR

摘要

A method for controlling the output voltage of an inverter driving a motor is provided to calculate total harmonic distortion (THD) based on the current detected in the motor and compare the THD with reference THD, thereby changing the pulse width modulation (PWM) which modulates the pulse width of a control pulse signal controlling the output voltage of the inverter from a first modulation method which decreases the harmonic waves included in the output current of the inverter to a second modulation method and generating a control pulse based on the determined modulation method. [Reference numerals] (110) THD calculating unit; (120) Determining unit; (130) Generating unit