Design of Wireless Charging System for Electric Vehicle Using Sliding Mode Controller

This research focused on using a sliding mode controller and resonant inductive wireless charging system to improve electric vehicle charging. Wireless charging in electric vehicle has significant challenges in terms of charging time and operating battery efficiency. The main contribution this work is control the battery charging via sliding mode controller by constant voltage constant current technique based on proposed design. Initially, the system was designed by simulation program and consisted of the transmitted side which included grid, three phase rectifier, DC-DC boost converter, and DC-AC high frequency inverter, mutual inductance (one coil transmitter and six coil receiver), and receiver side (single-phase rectifier and battery pack). To achieve level 3 DC fast charging, a sliding mode controller was used to regulate the current and voltage by selecting appropriate number of coils in receiving side to fix at 100 A and 800 V, respectively. The simulation design and control were simulated using MATLAB 2022b. As a consequence, the DC-DC boost converter increased the transmitted voltage to 800 V within 20 KHz to minimize wave signal ripple, while a sliding mode controller maintained the transfer voltage and constant current at 800 V and 100 A, respectively, throughout charging from 10% to 100%. Furthermore, a sliding mode controller operated to charge the system within 25 minutes as a fast-charging method. Finally, the behavior and value of the voltage that delivered to the battery have been confirmed.