期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 37, 期 11, 页码 13966-13977出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2022.3184952
关键词
Cross-quadrant mode; GaN high-electron-mobility transistors (HEMTs); radio frequency power amplifiers; resonant inverters; reverse conduction
资金
- National Natural Science Foundation of China [51977165]
This article introduces a GaN-based cross-quadrant mode Class-E amplifier, which achieves both high power and high efficiency with low-voltage-rating devices by utilizing the reverse conduction of GaN transistors.
Class-E power amplifiers are widely used in megahertz frequency power conversion systems due to their high efficiency, which can further he enhanced by virtue of wide-bandgap devices such as GaN high-electron-mobility transistors. Here, a GaN-based cross-quadrant mode Class-E amplifier is proposed, which addresses one of the major challenges for such amplifiers, i.e., to achieve both high power and high efficiency with low-voltage-rating devices. By utilizing the reverse conduction of GaN transistors, a cross-quadrant mode Class-E amplifier with small dc-feed inductance is constructed, whose circuit model is derived by virtue of the Laplace transform technique. We demonstrate an experimental prototype operating at 3.11 MHz with a 100-V GaN transistor, achieving an output power of about 6 W with the efficiency being almost 90% when the input voltage is 10 V and the load resistance is 28 Omega. Compared with conventional Class-E amplifiers, the power conversion capability of the proposed amplifier is increased up to three times from 0.49 to 1.69 with a slight reduction in efficiency. Such cross-quadrant mode amplifiers can be used to improve the power conversion capability and to reduce the peak switch voltage at the same output power level.
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