Analysis and Evaluation of a Dual-Variable Closed-Loop Control of Power Converter With Wireless and Nonwireless Power Transfer

This paper presents a closed-loop controller that regulates the voltage or current at both wireless power transfer (WPT) output and nonwireless power transfer (non-WPT) output simultaneously while using the same set of components. First, a power converter topology that has two types of outputs, a WPT output and a non-WPT wired output, is introduced. This dual-type output (DTO) power converter uses the same set of power components for the two outputs in order to eliminate the transmitter-side circuit in a WPT system, which results in reduced cost and size. Second, a method is presented in order to independently control and regulate each of the two outputs (voltage and/or current) by using two variables, the duty cycle and the switching frequency. The dual-variable DTO controller regulates the non-WPT output by modulating the duty cycle of the switches and regulates the WPT output by modulating the switching frequency of the same switches of the DTO power converter. The theoretical basis and experimental prototype results, including those with dual battery charging, are provided in order to illustrate and validate the presented method.