Fault Analysis of DC – DC Converter

This paper presents the fault identification in head lamp of Electric Vehicle (EV) using fault diagnostic methods. The single-ended primary-inductor converter (SEPIC) is a type of DC/DC converter, which is used in wide range of application as it allows variable output voltage. It is used in electric vehicle to provide variable voltage to auxiliary parts of the vehicle. The SEPIC converter interconnects the battery and headlamp in EV. The fault in the converter affects all auxiliary parts in the vehicle. Identification of fault in the circuit at the initial stage prevents the other parts of the system from damage and regularizes the power flow in the system. Headlamp operates in voltage of 12V, 35W power supply. Early identification of faults in the converter can prevent malfunction of headlight. This is done by the fault indication mechanism. The indication system is used to provide notification to the user and displays where the fault has occurred in the vehicle. The proposed system shows the indication of short circuit and open circuit faults in the converter and headlamp. The system is implemented in hardware and the experimental results are presented.