Electrical Vehicle

Development of electrical vehicle (EV) and hybrid electrical vehicle (HEV) gives many opportunities and challenges in power electronic drive, especially in the development of traction motor drive that requires advanced power electronic inverter. Multilevel inverter was first proposed by Nabae in early 1980. The general structure of the multilevel inverter is to synthesis a sinusoidal voltage out of several levels of dc voltages. This paper shows comparison between the 3-Level Cascaded H-Bridge Multilevel Inverter and 5-Level Cascaded H-Bridge Multilevel Inverter. It is found that by using 5-level Cascaded H-Bridge Multilevel Inverter (CHMI) can reduce torque and flux ripples compare to 3-Level CHMI and hence can improve DTC performances.

This paper presents an inductive power transfer technology for the charging application of an electric vehicle (EV). The inductive power transfer has been an essential and effective way of transferring power to EV on the run. The frequency mismatch in between primary and secondary of inductive coupling is a major problem under a dynamic load condition of EV. In this paper, a suitable material and coil winding are chosen for primary and secondary coil to meet out the maximum inductive power transfer between the primary and secondary. Hence, a phase locked loop subsystem has been implemented for rectifying the frequency mismatch in between primary and secondary. The range of frequencies for which efficiency have been studied and analyzed under different load conditions. Finally, results have been obtained for a maximum power coupling as compared with conventional wireless transfer schemes.