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 language | English (US) |
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Title of host publication | ECCE 2020 - IEEE Energy Conversion Congress and Exposition |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 4607-4612 |
Number of pages | 6 |
ISBN (Electronic) | 9781728158266 |
DOIs | |
State | Published - Oct 11 2020 |
Event | 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States Duration: Oct 11 2020 → Oct 15 2020 |
Publication series
Name | ECCE 2020 - IEEE Energy Conversion Congress and Exposition |
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Conference
Conference | 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 |
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Country/Territory | United States |
City | Virtual, Detroit |
Period | 10/11/20 → 10/15/20 |
Bibliographical note
Publisher Copyright:© 2020 IEEE.
Keywords
- Class E rectifier
- High-frequency power rectifier
- Self-synchronization