Averaging Method for PWM DC-DC Converters Operating in Discontinuous Conduction Mode with Feedback

摘要

In this paper, a one-cycle-average (OCA) discrete-time model for PWM dc-dc converter based on closed-loop control method for discontinuous conduction mode (DCM) is presented. It leads to exact discrete-time mathematical representation of the OCA values of the output signal even at low frequency. It also provides the exact discrete-time mathematical representation of the average values of other internal signals with little increase in simulation time. A comparison of this model to other existing models is presented through a numerical example of boost converter. Detailed simulation results confirm the better accuracy and speed of the proposed model.