PWM-switch modeling of DC-DC converters

• Published in: IEEE transactions on power electronics 1995-11, Vol.10 (6), p.659-665
• Main Authors: Van Dijk, E., Spruijt, J.N., O'Sullivan, D.M., Klaassens, J.B.
• Format: Article
• Language: English
• Subjects: Applied sciences; Circuit simulation; DC-DC power converters; Electrical engineering. Electrical power engineering; Electrical equipment; Electronics; Equivalent circuits; Exact sciences and technology; Power electronics, power supplies; Pulse width modulation; Pulse width modulation converters; Steady-state; Switches; Switching converters; Transient analysis; Voltage
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/63.471285

The introduced PWM-switch modeling method is a simple method for modeling pulse-width-modulated (PWM) DC-DC converters operating in the continuous conduction mode. The main advantage of this method is its versatility and simple implementation compared to other methods. The basic idea is the replacement of the switches in the converter by their time-averaged models. These switch models have been developed in such a way that the converter model provides the same results as the state-space-averaging technique but not including nonlinear effects. Simple rules for determination of the switch models are obtained. The resulting model is a time-averaged equivalent circuit model where all branch currents and node voltages correspond to their averaged values of the corresponding original currents and voltages. The model also includes parasitics, second-order effects and nonlinearities, and can be implemented in any circuit-oriented simulation tool. The same model is used for the simulation of the steady-state and the transient behavior.< >