A Wireless Power Transfer System Based on Dual‐Frequency Switching for Dual Constant Voltage Supplies

ABSTRACT Wireless power transfer (WPT) systems with constant voltage (CV) output function are widely used in various fields due to their stable performance, strong compatibility, and high safety. However, existing WPT systems with multiple specifications CV output have many problems, including cross‐coupling between multiple coils, low system space utilization, and complex closed‐loop control. To this end, this article proposes a WPT system with two specifications CV output. By switching between two fixed operating frequencies, the system can be equivalently configured as two typical compensation structures: CLC‐S and S‐LCC, thereby achieving two different specifications of CV output and zero phase angle (ZPA) operation. The proposed system can provide a simple and reliable solution for industrial application scenarios that require multiple CV outputs and has the advantage of not requiring complex closed‐loop control design and tedious system design. Finally, a verification test prototype with CV output of 40 and 70 V is built, and the experimental results verified the feasibility of the theoretical analysis.