A Soft-Switching Transformerless DC−DC Converter With Single-Input Bipolar Symmetric Outputs
| Autor: | Xiang Zhou, Yan-Fei Liu, Laili Wang, Yue Wang, Paresh C. Sen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Computer science
business.industry 020208 electrical & electronic engineering Transistor Electrical engineering 02 engineering and technology Audio power amplifier law.invention Power (physics) Capacitor law Control theory Auxiliary power unit Control system 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering business Power density |
| Zdroj: | IEEE Transactions on Power Electronics. 36:8640-8646 |
| ISSN: | 1941-0107 0885-8993 |
| Popis: | In this letter, a soft-switching transformerless dc−dc converter with single-input bipolar symmetric outputs (SIBSO) is proposed, which has positive and negative outputs with equal voltage amplitude and can be used in audio amplifier, bipolar symmetric auxiliary power supply application, etc. Based on the proposed bipolar symmetric outputs cells, the SIBSO dc−dc converter only requires two switches forming a half bridge circuit, and zero voltage switching (ZVS) of the two switches can be achieved over full load range. In addition, common ground of input and outputs is realized, which means the floating driver and isolated sensors are not required in the proposed dc−dc converter. The controller and drivers can be powered up by using input power supply through a simple step-down circuit, which reduces not only the cost and volume but also the complexity of the converter. The operation modes and characteristic of the proposed SIBSO dc−dc converter are analyzed. Moreover, parameter design for ZVS operation is presented. Finally, a 60-W 1-MHz switching frequency prototype is built up by using GaN high electron mobility transistors (HEMTs). Experimental results shown that bipolar symmetric outputs are obtained with common ground of input and output, and peak efficiency of 95.8% and power density of 154 W/in3 are achieved. |
| Databáze: | OpenAIRE |
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