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A New Zero-Voltage-Switching Push-Pull Converter
School of Electrical and Electronics Engineering, East China Jiaotong University, Nanchang, China
School of Electrical and Electronics Engineering, East China Jiaotong University, Nanchang, China
- 1 School of Electrical and Electronics Engineering, East China Jiaotong University, Nanchang, China
- 2 School of Electrical and Electronics Engineering, East China Jiaotong University, Nanchang, China
Energy and Power Engineering·Volume 05 (2013)·Pages 125–131·Published 30 June 2013·DOI10.4236/epe.2013.54B024
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Abstract
A soft switching three-transistor push-pull（TTPP）converter is proposed in this paper. The 3rd transistor is inserted in the primary side of a traditional push-pull converter. Two primitive transistors can achieve zero-voltage-switching (ZVS) easily under a wide load range, the 3rd transistor can also realize zero-voltage-switching assisted by leakage inductance. The rated voltage of the 3rd transistor is half of that of the main transistors. The operation theory is explained in detail. The soft-switching realization conditions are derived. An 800 W with 83.3 kHz switching frequency prototype has been built. The experimental result is provided to verify the analysis.
KeywordsPush Pull ConverterExtra TransistorZero-voltage-switching
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