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A CMOS Active Rectifier with Efficiency-Improving and Digitally Adaptive Delay Compensation for Wireless Power Transfer Systems

Author

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  • Yichen Zhang

    (Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
    Yichen Zhang and Junye Ma contributed equally to this work.)

  • Junye Ma

    (Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
    Yichen Zhang and Junye Ma contributed equally to this work.)

  • Xian Tang

    (Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China)

Abstract

A CMOS active rectifier with digitally adaptive delay compensation for power efficiency improvement is presented in this work. The power transistors are turned on and turned off in advance under the control of the regenerated compensation signals, which are generated by the proposed compensation control circuit; therefore, the reverse current is eliminated, and the efficiency is increased. Simulation results in a standard 0.18 μm CMOS process show that the turn-on and turn-off delay of the rectifier is effectively compensated. The power efficiency is up to 90.6% when the proposed rectifier works at the operation frequency of 13.56 MHz.

Suggested Citation

  • Yichen Zhang & Junye Ma & Xian Tang, 2021. "A CMOS Active Rectifier with Efficiency-Improving and Digitally Adaptive Delay Compensation for Wireless Power Transfer Systems," Energies, MDPI, vol. 14(23), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:23:p:8089-:d:693978
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    Cited by:

    1. Desheng Zhang & Run Min & Zhigang Liu & Qiaoling Tong & Qiao Zhang & Ting Wu & Ming Zhang & Aosong Zhou, 2022. "Reducing Circling Currents in a VHF Class Φ 2 Inverter Based on a Fully Analytical Loss Model," Energies, MDPI, vol. 15(22), pages 1-17, November.

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