1. Modified VIENNA Rectifier III to Achieve ZVS in All Transitions: Analysis, Design, and Validation.
- Author
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Zhao, Sisi, Borovic, Uros, Silva, Marcelo, Garcia, Oscar, Oliver, Jesus Angel, Alou, Pedro, Cobos, Jose Antonio, and Pejovic, Predrag
- Subjects
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ELECTRICAL conductivity transitions , *ZERO voltage switching , *AC DC transformers , *ELECTRIC current rectifiers , *ELECTROMAGNETIC interference , *EXPERIMENTAL films , *DC-to-DC converters - Abstract
In this article, analysis and design of a 3.3-kW isolated single-stage three-phase buck-type rectifier for aircraft applications is presented. The operating principle and modulation method of the proposed rectifier are introduced. The advantageous zero-voltage switching (ZVS) feature in all of the switching transitions is analyzed. A comparison with the VIENNA Rectifier III is done, being different both in the phase-leg implementation and the modulation sequence. A detailed rectifier design guideline is discussed and losses estimations are provided aiming at reaching 93.7% overall efficiency, including the EMI (electromagnetic interference) filter. Simulation waveforms are presented. Finally, experimental results obtained with the designed 3.3-kW hardware demonstrator are provided. The results verify achievement of ZVS in all of the switching transitions from full load down to 50% of nominal load, while exhibiting 1.9% THD $_I$ (total harmonic distortion) and 0.9996 PF (power factor) at nominal power, ultimately showing very good agreement to the simulation results. This article is accompanied by a video demonstrating experimental operation of the proposed rectifier at nominal input voltage, output voltage, and output power. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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