EV Battery Charging with Input Power Factor Correction Using a Buck–Boost Converter

Abstract

Some of the devices that are used in industrial, commercial and residential applications need DC supply for their proper functioning and operation. The devices that are used for conversion of AC supply to DC are basically behaved as non-linear loads and thus have non-linear input characteristics, which results in production of non-sinusoidal line current. Also, current comprising of frequency components at multiples of line frequency is observed which lead to line harmonics. Due to the increasing demand of these devices, the line current harmonics pose a major problem by degrading the power factor of the system thus affecting the performance of the devices. Hence, there is a need to reduce the line current harmonics, so as to improve the input power factor (IPF) of the system. This has led to designing of IPF correction circuits using new buck–boost converter topology. In this article, the authors used this circuit particularly for electric vehicle (EV) battery charging from AC supply. A passive power factor correction circuit with new buck–boost converter (BBC) is implemented for improving the IPF. Hysteresis current control (HCC) technique and PID controllers are used for both voltage regulation and IPF correction.