Design and Implementation of a Fuzzy Logic Controlled Isolated Bidirectional DC-DC Converter for Electric Vehicle Power Management

Abstract

Electric vehicles (EVs) require highly efficient and adaptable power management systems to regulate energy flow between various components, including batteries, supercapacitors, and regenerative braking systems. An isolated bidirectional DC-DC converter (IBDC) is a critical component in EV powertrains, allowing energy to be transferred between high-voltage batteries and low-voltage auxiliary systems while also supporting bidirectional power flow for functions such as regenerative braking and battery charging. This paper focuses on the design and implementation of an IBDC integrated with a fuzzy logic controller (FLC) that is specifically designed for electric vehicle applications. The fuzzy logic controller outperforms conventional PID controllers by adapting to the nonlinearities and uncertainties inherent in EV power systems. The controller improves the converter's dynamic response, resulting in faster and more accurate voltage regulation, lower switching losses, and increased overall system efficiency. Simulation and experimental results show that the fuzzy-controlled IBDC outperforms conventional control methods in voltage regulation, transient response, and energy efficiency. This makes the proposed system ideal for EV applications requiring optimal energy management and dependable operation.