A PFC Hysteresis Current Controller for Totem-pole Bridgeless Bi-directional EV charger

Abstract

The sheer increase in greenhouse gas emissions coupled with depleting fossil fuel reserves has created widespread interest in the design and development of Electric Vehicles; however, the design of reliable charging infrastructures for Electric Vehicles is posing challenges to engineers. Additionally, to enhance the efficiency of these Electric Vehicles, it is desirable for the chargers to have bidirectional power processing capabilities. Therefore, the development of bidirectional Battery chargers is one of the main areas of interest when it comes to EVs. In this regard, this paper presents a Hysteresis Controller for a Bridgeless bidirectional On-Board Battery Charger for Electric Vehicle applications. The AC power is fed from a grid via a totem pole-based AC-DC converter. However, the problem with such a power supply unit is that the design of inner current loop PID compensators is challenging due to the increase in complexity of the mathematical model. Therefore, in this paper, the conventional PID controller of the inner current loop is replaced with a Hysteresis controller. The control strategies have been developed to ensure that the power drawn by the grid is harmonic-free. The simulation study is carried out on a 1.5kW setup using MATLAB/SIMULINK. The proposed system is tested for bi-directional power flow. The simulation results are found to be in total agreement with the studied theory. © 2022 IEEE