Design and Optimization of PI Controller for Multiple-output Wireless Electric Vehicle Charger

This paper focuses on designing and modeling multiple-output wireless chargers for electric vehicles (EVs). This paper uses a closed loop buck converter to obtain variable output dc voltage of a wireless electric vehicle charger (WEVC). For designing a closed-loop buck converter, a PI controller is used. The tuning of a PI controller for a nonlinear system is a typical task; therefore, in the paper, three optimization techniques such as Krill Herd Optimization (KHO), Harris Hawks Optimization (HHO), and Sparrow Search Optimization (SSO) utilized to find the optimum value of a PI gain parameters (Kp and Ki). Background: Wired charging system is famous but contains problems like unkempt wires and protection concerns in a damp environment. Then a solution to this problem is a wireless charger because it does not contain any exposed wires. Hence it is convenient for charging and intrepid transmission of power in antagonistic environmental conditions. A wireless charger can be used in unmanned electric vehicles. Objective: The objective of this study is to develop a wireless electric vehicle charger at the variable output voltage. The performance analysis by different optimization techniques such as SSO, KHO, and HHO for variable reference output voltage. Methods: Three optimization techniques are used, such as SSO, KHO, and HHO, for obtaining smooth output dc voltage, reducing harmonics, and improving power transfer capability. Results: SSO gives better results for the variable output voltage of the wireless charger. Conclusion: Wireless charger is designed at a variable reference output voltage and SSO-optimized PI-gain parameters of the charger and provides better performance than other optimization techniques, such as HHO and KHO.