Self-Synchronized Class e Resonant Rectifier with Direct Voltage Detection Method

Minki Kim, Jungwon Choi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a high-frequency self-synchronized class E resonant rectifier for a wireless power transfer (WPT) system using a direct voltage detection method. Synchronous rectification increases the efficiency of the WPT system by replacing diodes into switching devices such as MOSFETs. However, in the high-frequency, mid-range WPT system, it is challenging to carry the gate signal from the transmitting side to the synchronous rectifier. In order to overcome this issue, we propose the self-synchronized rectifier without the gate signal from the inverter. The direct voltage detection method synchronizes the gate signal by sensing the input voltage of the L-C resonant filter. Even though a gate driver and a comparator have a 10 ns total propagation delay, the leading phase of the sensing voltage offsets the driver's propagation delay. In the experiments, the proposed rectifier was connected to a class E resonant inverter operating at 13.56 MHz. At an output power of 244 W and a frequency of 13.56 MHz, the total power conversion efficiency of the DC-DC converter is 88.59%.

Original languageEnglish (US)
Title of host publicationECCE 2020 - IEEE Energy Conversion Congress and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4607-4612
Number of pages6
ISBN (Electronic)9781728158266
DOIs
StatePublished - Oct 11 2020
Event12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States
Duration: Oct 11 2020Oct 15 2020

Publication series

NameECCE 2020 - IEEE Energy Conversion Congress and Exposition

Conference

Conference12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Country/TerritoryUnited States
CityVirtual, Detroit
Period10/11/2010/15/20

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

Keywords

  • Class E rectifier
  • High-frequency power rectifier
  • Self-synchronization

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