Lecture 15 Full bridge and flyback

Lecture 15 Full bridge and flyback - Lecture 15 Full-bridge...

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1 Lecture 15 Full-bridge converter and Flyback converter EEE 498/591 – Raja Ayyanar
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2 1 D 2 D 1 S 2 S • Switch voltage rating half of single switch converter • No need for reset winding • Leakage energy fed back to source Two switch forward converter EEE 498/591 – Raja Ayyanar
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3 • Buck derived, four controllable switches • Popular topology at higher power levels, > 500W • Bi-directional excitation of transformer core • Doubling of frequency at secondary Full bridge converter EEE 498/591 – Raja Ayyanar
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4 • DC - high frequency AC – DC • Center-tapped secondary • Characteristics of buck converter 1 S 2 S 3 S 4 S 1, pri T 1,sec_1 T 1,sec_ 2 T 1 D 2 D rect v   o C in V o V rect v Full bridge converter EEE 498/591 – Raja Ayyanar
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5 sec,1 i sec,2 i pri i 1 S 2 S 1 D 2 D o L sec,1 i sec,2 i pri i 1 D 2 D o L ON OFF Positive half cycle EEE 498/591 – Raja Ayyanar
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6 sec,1 i sec,2 i pri i 3 S 4 S 1 D 2 D o L sec,1 i sec,2 i pri i 1 D 2 D o L OFF ON Negative half cycle EEE 498/591 – Raja Ayyanar
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Lecture 15 Full bridge and flyback - Lecture 15 Full-bridge...

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