LARGE SIGNAL DISCRETE-TIME MODEL FOR PARALLELED BUCK CONVERTERS

Introduction　　 In recent years,due to the rapid advances ofcomputer and communication,the power suppliesmust provide high current up to hundreds of am-peres and still have high efficiency and reliability.Under such requirements,multimodule- parallelingstructure is usually used and the load current isequally shared. The practical implementation ofthese distributed converters system is not alwaysstraightforward and various control problems arisebecause of undesirable interaction among subsys-t…

LARGE SIGNAL DISCRETE-TIME MODEL FOR PARALLELED BUCK CONVERTERS

As a number of switch combinations are involved in operation of multi converter system, conventional methods for obtaining discrete time large signal model of these converter systems result in a very complex solution. A simple sampled data technique for modeling distributed dc dc PWM converters system (DCS) was proposed. The resulting model is nonlinear and can be linearized for analysis and design of DCS. These models are also suitable for fast simulation of these networks. As the input and output of dc dc converters are slow varying, suitable model for DCS was obtained in terms of the finite order input/output approximation.