Fault analysis and protection strategy on Contactless Power Transfer system for electric vehicle

In this paper, the principle of a Contactless Power Transfer (CPT) system is introduced, the situation of CPT system for electric vehicle about excessive startup current, coil short, system overheating and load open circuit are analyzed and research. According to the actual operating conditions of CPT system may exist fault, ready to power on protection strategy, the short circuit protection strategy, over heat protection strategy and open circuit protection strategy is presented. Experimental results show that these protection strategies are very important for the safety of CPT system.