E^2級無線電力伝送システムにおける最大効率追従制御
小澤 祐太, 関屋 大雄
半導体電力変換研究会(SPC), July, 2017. [pdf document]

<Abstract>

This paper presents a closed loop design of the pre- and post-regulation control for the class-E2 WPT system. In the proposed WPT system, the output voltage is regulated by changing the duty ratio of the post-regulator, whose information is transmitted to the primary side by wireless communication standardized as ZigBee. At the transmitter side, the input current is minimized by changing the duty ratio of the pre-regulator for efficiency maximization under the condition that the necessary power is transferred to the receiver side. The experimental results show that the proposed control is a quite effective control strategy for the voltage regula- tion with keeping high system efficiency in the class-E2 WPT system because the soft-switching conditions can be achieved in the control range.