Patent ID: 8971067
Filing Date: 2015-03-03
Classification: H02M

Abstract:
1. An apparatus for controlling an inverter, the apparatus comprising: a phase voltage command unit configured to generate a voltage command for the inverter using a frequency command and a prescribed voltage to frequency ratio; a detector configured to detect a output current of the inverter; a first compensation voltage generator configured to generate a first compensation voltage based on a polarity of the output current of the inverter, the first compensation voltage including a voltage compensating the voltage command during a dead-time; an additional compensation voltage generator configured to generate a second compensation voltage based on a waveform of the output current of the inverter, the second compensation voltage including a voltage compensating the voltage command during the dead-time; and a pulse-width modulation (PWM) signal generator configured to generate a PWM signal based on a final voltage command obtained by adding the first and second compensation voltages, wherein the PWM signal is inputted to the inverter; wherein the additional compensation voltage generator includes: