Patent ID: 9647590
Date: 2017-05-09
CPC Classifications: H02M,H02P

Claim:
1. A phase compensation apparatus in an inverter output voltage in a system, the system comprising: an inverter configured to output a supply voltage to a motor; a controller configured to supply a command voltage to the inverter; a voltage detection unit configured to detect the supply voltage; a first determination unit configured to determine the command voltage; a second determination unit configured to determine the supply voltage; a first normalization unit configured to calculate a phase of the command voltage in a trigonometric function format by normalizing the command voltage using the determined magnitude of the command voltage; a first conversion unit configured to convert the supply voltage to a rotary coordinate system using the phase of the command voltage; a second normalization unit configured to calculate a phase error between the supply voltage and the command voltage by normalizing the converted supply voltage according to the supply voltage; and a second conversion unit configured to output a compensation voltage by converting the supply voltage to the rotary coordinate system using the calculated phase error, wherein the compensation voltage is identical to the supply voltage, and wherein a phase of the compensation voltage is identical to the calculated phase of the command voltage.