Implementation of Hybrid Boost-Sepic Converter for Ev Charging Application

Implementation of a Hybrid Boost SEPIC (HBSC) converter for an electric vehicle (EV) battery charging application. The HBSC converter is designed to efficiently boost a low DC input voltage to a regulated output suitable for battery charging. The system is powered by a 4V DC input, simulating the output of a solar panel, and boosts this voltage to 12V using the HBSC topology. The SEPIC stage ensures a non-inverting output, making it suitable for direct connection to the battery. Simulation of the HBSC converter was carried out using MATLAB Simulink (2021), and an efficiency of 83% was achieved under standard operating conditions. For hardware implementation, a Regulated Power Supply (RPS) provides the 4V input, while a gate driver circuit, powered by a 12V adapter, is used to drive the IRF460 MOSFET switches. The Arduino Uno microcontroller generates PWM signals, which are level-shifted by the gate driver from 5V to 12V to ensure proper switching of the MOSFETs. Energy storage and transfer within the converter are managed by the inductors and capacitors in both the boost and SEPIC stages, which facilitate voltage regulation and boost functionality. A relay circuit, triggered when the RPS is active, integrates protection by disconnecting the input when the battery voltage reaches 12V, as detected by a voltage sensor. This feature safeguards the battery from overcharging and enhances system reliability.