2.4kW Unity Power Factor Rectifier

work submitted in this thesis is my own work, except as acknowledged in the text, and has not previously been submitted for a degree at the University of Queensland or any other institution. Acknowledgements I would like to thank the following people for their valuable assistance during the year: Dr Geoff Walker, for his supervision and on his ongoing assistance throughout the year. His willingness to be a mentor, to engage in problem solving and to provide feedback was greatly appreciated and valued. Keith Bell, for his assistance in fabricating PCBs in an efficient and positive manner. Abstract The goal of this thesis is to develop a 2.4kW unity power factor rectifier. The final product will operate at an input of 240V and 10A. The motive for the development of this product was to develop a power supply capable of forming the basis for a battery charger. The Sustainable Energy Research Group (SERG) are currently developing a hybrid electric/solar car and it is hoped a battery charged can be developed to allow fast overnight charging of the 100 lithium ion cells which make up the battery pack. Worldwide AC/DC switch mode power supplies (SMPS) are a multi billion dollar industry and continues to be a growth industry within the field of power electronics. SMPS service applications range from communication and computers through to military uses. One of the leading topics in line-operated power-converter design is to take the power from the grid but not to return it. Ideally, the power converter will present as purely resistive to the ac source. This is known as Unity Power Factor (UPF) and it has become an important design issue as a consequence of recent legislation. European legislation restricts the harmonic content for power supplies. International standards are emerging known as the IEC 1000