Professorial Dissertation from the year 2014 in the subject Electrotechnology, grade: Master, Hohai University, course: Power Electronics, language: English, abstract: The main study innovation-objective of this thesis is to develop a novel high-efficiency battery charger with ZCS PWM buck topology which has simple circuit structure, low switching losses, easy control and high charging efficiencies. Beside, this project is about to investigate the action of efficient performance in charging shaping to gain the high output charging efficiency of the battery charger.