Practical object-oriented simulation approach for active PFC converter with digital control

In this paper, an efficient power electronic circuit simulation approach of a single-phase active PFC power converter system is discussed. The control circuit simulation software algorithm used in this simulation technique can also be applied to a digital signal processor (DSP) for the control of a practical power factor 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 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 effectiveness of a single-phase PFC power converter with digital control strategy and its performance evaluation on the basis of computer-aided simulation.