| Title |
Multi-Coil Pad Driving Algorithm Based on Phase Coupling Coefficient for High Efficiency Operation |
| Authors |
김도연(Do Yeon Kim) ; 이도현(Do Hyeon Lee) ; 안동혁(Dong Hyuk Ahn) ; 이병국(Byoung-Kuk Lee) |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.5.1226 |
| Keywords |
Multi-phase wireless charging pad; Multi-coil pad driving method; Wireless Power Transfer (WPT) |
| Abstract |
This paper proposes an optimal driving algorithm for 50 [kW] wireless charging system with multi-coil pad to achieve high efficiency over a wide load range under SAE J2954 misalignment. Two driving strategies are considered, simultaneous driving where all phases are activated and selective driving where only well-coupled phases are activated. The target system employs a three-phase pad composed of DDP coils for phases A and B and a CP coil for phase C, together with a three-phase IPT converter that supports phase selection. Based on loss characteristics under varying load and alignment conditions, the multi-coil driving algorithm is derived to switch between the two strategies and to select the active A/B phase during selective operation. Finally proposed multi-coil driving algorithm is validated the feasibility and efficiency improvement through experiments on a 50 [kW] system. |