Computer simulation of an integrated AC-DC rectifier with reverse conducting transistors

Abstract

This paper describes the principles of operation and the physical model of an integrated AC-DC rectifier acting as a reverse-conducting transistor AC-DC rectifier with MOSFETs as fast-switches with a low ON-state voltage drop. An integrated AX-DC rectifier, when seen as a transistor AC-DC rectifier, can be used in many fields, e.g., for multi-functional automotive alternators, generator sets, welding machines, etc. The paper also describes a new reverse-conducting transistor AC-DC rectifier, without the use of optoelectronic separation (which does not require a separate power supply), which may be easily realized in ASIC technology. Computer simulation allows for currents timing of all components of the AC-DC rectifier's physical model, both during normal operation as well as in some states of emergency. The paper presents the results of bench experimental studies where the MOSFETs were used as a fast-switches with a relatively low ON-state voltage drop. For experimental studies, an AC-DC rectifier has been put together on the Mitsubishi FM600TU module. The reverse-conducting transistor AC-DC rectifier in a three-phase bridge connection has a lot of advantages compared to the conventional diode AC-DC rectifier, such as higher energy efficiency and greater reliability resulting from the lower temperature of switches.