Simulation and analysis methods for sampled power electronic systems

Abstract

Results of computer analysis methods are assessed in the case of a boost regulator in light and heavy condition mode. Five methods are evaluated which are based on network topology, differential equation, non-linear continuous frequency model, linearized low frequency models, and linearized discrete time model. Evaluation of criteria are: domains of application, accuracy and economics. Particular emphasis is given to a non-linear continuous time model derived from the state variable representation. Taking the average of state vector over one period leads to a large signal and small signal models with separate set of equations for buck boost regulators in heave and light conduction modes. Frequency domain transformation follows naturally involving duty ratio and input voltage. An equivalent current generator model driving the output filter is also presented.