Power Balanced CC-CV Wireless EV Charging System
Power Balanced CC-CV Wireless EV Charging System
Dr. R. Senthamil Selvan
Associate ProfessorDepartment of ECE,
Annamacharya Institute ofTechnology and Sciences
(Autonomous), Tirupati,AP,India
K. Nithin Reddy
UG StudentDepartment of ECE,Annamacharya Institute of
Technology and Sciences(Autonomous), Tirupati,AP,India
R. Varshitha
UG StudentDepartment of ECE,Annamacharya Institute of
Technology and Sciences(Autonomous), Tirupati,AP,India
G. Naveen Varma
UG StudentDepartment of ECE,Annamacharya Institute of
Technology and Sciences(Autonomous), Tirupati,AP,India
B. Naveen Kumar
UG StudentDepartment of ECE,Annamacharya Institute of
Technology and Sciences(Autonomous), Tirupati,AP,India
Abstract— The increasing demand for efficient and contactless charging solutions for electric vehicles (EVs) has accelerated the development of wireless power transfer (WPT) systems. This paper presents a power balanced Constant Current–Constant Voltage (CC–CV) wireless EV charging system designed to enhance charging stability, efficiency, and reliability. The proposed system employs inductive power transfer using a primary–secondary coil arrangement, with Arduino based control for regulating power flow and maintaining charging modes. A solar-assisted transmitter supplies power to the primary coil, while the receiver side integrates a rectifier and DC–DC converter to deliver astable DC output. The system operates in CC mode during the initial charging stage, providing a constant current of approximately 1.0 A at 9.5 V, followed by a smooth transition to CV mode, maintaining a constant voltage of 12 V with current gradually decreasing to 0.45 A, ensuring safe battery charging. Experimental results demonstrate that the system achieves a maximum efficiency of 91% at a 2 cm coil distance, with efficiency decreasing to 73% at 8 cm due to increased air gap. Under slight coil misalignment, efficiency remains above 84%, indicating robustness of the design. Compared to conventional systems (~75% efficiency), the proposed approach improves overall performance to approximately