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A FULL-BRIDGE SR-PWM DC-DC CONVERTER OPERATING AT REDUCED CONDUCTION AND COMMUTATION LOSSES USING PHASE-SHIFf CONTROL
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| Author(s) |
J. C. da Silva e Sousa; A. A. Pereira; L. C. de Freitas; V. J. Farias; J. B. Vieira Junior |
| Abstract |
This paper presents a SR-PWM Full-Bridge DC-DC ·converter operating at reduced conduction and commutation losses and using phase-shift control. This converter
employs a self-resonant circuit and a tapped inductor for minimizing a circulating current flowing through the transformer and switching devices. The principle of the self-resonant circuit provides the soft switching. It is based in an auxiliary voltage source that feeds the resonant circuit, charging a capacitor which provides the condition for zero voltage switching (ZVS) of the main switches. The proposed approach allows building a converter
with high frequency of operation. A detailed analysis of the operation is presented. The output voltage is controlled by PWM. The complete theoretical analysis, operating principles, simulation and experimental results are presented. |
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| Filename: | Unnamed file |
| Filesize: | 573.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2016-03-08 by System |
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