Journal article
A Class-E-Based Resonant AC-DC Converter with Inherent PFC Capability
This paper investigates the use of the class-E inverter for power factor correction (PFC) applications. Analytical and state-space models are derived showing the class-E inverter’s capability of achieving inherent PFC operation with a constant duty cycle. The inherent PFC operation limits the controller responsibility to the regulation of the output voltage, which is key for resonant converters with challenging control.
A converter incorporating a diode bridge, a class-E inverter, and a class-D rectifier is presented for the PFC stage in single-phase offline converters. A prototype is designed to validate the analysis and presented design method. The prototype operates with zero-voltage switching (ZVS) across the load range and achieves up to 211W of output power at an efficiency of 88 %, with an inherent power factor of 0.99 and a total harmonic distortion (THD) of 8.8 %.
Frequency modulation is used to achieve lower output power down to 25W, with a power factor of 0.95, THD of 28 %, and an efficiency of 88 %.
| Language: | English |
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| Publisher: | IEEE |
| Year: | 2021 |
| Pages: | 46664-46673 |
| ISSN: | 21693536 |
| Types: | Journal article |
| DOI: | 10.1109/ACCESS.2021.3067800 |
| ORCIDs: | Ammar, Ahmed Morsi , Nour, Yasser and Andersen, Michael A. E. |
