An Original Method Based on Simulink to Model and Simulate A.C.-D.C. Converters Taking into Account the Overlap Phenomenon

Abstract

This paper presents a simple and original method to simulate the behaviour of a.c.-d.c. converters with Matlab-Simulink. This approach takes into account the overlap phenomenon with continuous and discontinuous conduction modes. The a.c. to d.c. converter is presented as a block (voltage input and voltage output) which can be inserted in a complex structure. The simplicity of the method makes it easy to understand and its short computing time makes it an interesting alternative to the Matlab SimPower Systems toolbox and PSIM software for teaching power electronics simulation. The method is designed in order to be user-friendly and easy to implement for students. In this paper, it is used for a six-pulse rectifier and extended to a twelve-pulse rectifier with delta/wye-delta transformer. Experimental results are provided to validate the proposed modelling method.