Abstract:

The objective of this work is the design and development of improved power quality based converters with improved efficiency and high power density for power factor correction at the front end of the conventional charger of light EVs. These converters are designed for low cost EVs such as E-rickshaw battery, either in two stage or single stage configurations. A diode bridge rectifier (DBR) is the basic circuit to convert available AC mains voltage into DC voltage for charging, which leaves behind many harmonics in the input side current owing to its nonlinear behaviour resulting in poor power quality indices. This work aims at the design of PFC converter in discontinuous conduction mode (DCM), which employs the voltage feedback based control with single voltage sensor to be used for inherent PFC and output voltage regulation. However, a constant current-constant voltage based charging method is used to control the battery current at rated line and loading conditions.