Computer-aided simulation of digitally-controlled active single phase PFC converter

In this paper, an efficient power electronic circuit simulation approach is discussed for a digitally controlled single-phase active PFC converter system. The control circuit simulation control software used in this simulation technique can also be applied to the digital signal processor (DSP) for control implementation of a practical power factor correction power conversion circuit. This circuit simulation technique is based on a circuit equation modeled by substituting control input dependent time-varying resistors in place of active power switches and passive diodes incorporated into the active PFC converter circuit and the system treated here; one state-vector equation described by state-variables for inductors and capacitors together with an algebraic computation method to transform the matrices of the circuit equation into matrices of the state vector equation. In addition, this paper proves the effective performance of a single phase PFC converter with digital control strategy and its performance evaluation on the basis of computer-aided simulation accompanied by experimental results