Inductive power transfer (IPT) offers clear benefits over wired power transmission in battery charging, including safety, convenience, and automation. In this paper, we introduce an IPT system with a variable inductor on the primary side to achieve constant current (CC) and constant voltage (CV) charging, and zero voltage switching (ZVS) of all switches. The proposed system operates at a fixed frequency, eliminates the need for wireless communication and any secondary-side control, minimizing the complexity and cost of the secondary side especially. The approach is experimentally validated to maintain the charging current and voltage within 3.2% when in those respective modes, with a maximum efficiency of 94.8%.
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