A Novel Dead Time Compensation Method of Single-phase PWM Rectifier

Because Single-phase PWM rectifier usually runs unity power factor condition; the phase between grids input voltage and current are the same. In this paper, a novel dead time compensation method of single-phase PWM rectifier is proposed by the observation of grid input voltage based on resonant controller phase-looked loop. The new method avoids the noise of the current detection, so that zero-crossing detection is more accurate, and does not cause the phase delay. Comparative analysis with traditional dead time compensation method based on the current. The simulation and experiment results show that the grid input current total harmonic distortion with grid input voltage observation are lower and compensation effect is better.