Chapter 8 Switching Power Supplies

1. Chapter 8Switching Power Supplies “Introduction to Modern Power Electronics”, 2nd Ed., John Wiley 2010 by Andrzej M. Trzynadlowski

2. Buck converter Fig. 8.1 Chapter 8

3. Voltage and current waveforms in a buck converter Fig. 8.2 Chapter 8

4. Waveforms of the capacitor current and output voltage in a buck converter Fig. 8.3 Chapter 8

5. Boost converter Fig. 8.4 Chapter 8

6. Voltage and current waveforms in a boost converter Fig. 8.5 Chapter 8

7. Waveforms of the capacitor current and output voltage in a boost converter Fig. 8.6 Chapter 8

8. Impact of the inductor resistance on the voltage gain of a boost converter Fig. 8.7 Chapter 8

9. Buck-boost converter Fig. 8.8 Chapter 8

10. Voltage and current waveforms in a buck-boost converter Fig. 8.9 Chapter 8

11. uk converter Fig. 8.10 Chapter 8

12. Waveforms of voltage and current in a ukconverter Fig. 8.11 Chapter 8

13. SEPIC (a) and Zeta (b) converters Fig. 8.12 Chapter 8

14. Voltage and current waveforms in SEPIC and Zeta converters Fig. 8.13 Chapter 8

15. Voltage and current waveforms in SEPIC and Zeta converters Fig. 8.13 Chapter 8

16. Vorperian’s switch model Fig. 8.14 Chapter 8

17. Averaged models of switched-mode dc-to-dc converters with Vorperian’s switch model: (a) buck, (b) boost, (c) buck-boost, (d) uk Fig. 8.15 Chapter 8

18. Waveforms of the output voltage and current in a buck converter: solid lines – actual converter, dashed lines – averaged model Fig. 8.16 Chapter 8

19. Equivalent circuits of a transformer: (a) ideal transformer, (b) transformer with the magnetizing inductance included Fig. 8.17 Chapter 8

20. Forward converter Fig. 8.18 Chapter 8

21. Flyback converter Fig. 8.19 Chapter 8

22. Isolated uk converter Fig. 8.20 Chapter 8

23. Midpoint rectifier Fig. 8.21 Chapter 8

24. Push-pull converter Fig. 8.22 Chapter 8

25. Half-bridge converter Fig. 8.23 Chapter 8

26. Full-bridge converter Fig. 8.24 Chapter 8

27. Voltage-mode resonant switches: (a) L-type half-wave, (b) M-type half-wave, (c) L-type full-wave, (d) M-type full-wave Fig. 8.25 Chapter 8

28. Current-mode resonant switches: (a) L-type half-wave, (b) M-type half-wave, (c) L-type full-wave, (d) M-type full-wave Fig. 8.26 Chapter 8

29. Waveforms of the inductor current and capacitor voltage in an undamped resonant circuit Fig. 8.27 Chapter 8

30. Quasi-resonant ZVS buck converter with L-type half-wave switch Fig. 8.28 Chapter 8

31. Quasi-resonant ZCS boost converter with M-type full-wave switch Fig. 8.29 Chapter 8

32. Chapter 8

33. Series-loaded resonant converter Fig. 8.30 Chapter 8

34. AC equivalent circuit of the series-loaded resonant converter Fig. 8.31 Chapter 8

35. Control characteristic of the series-loaded resonant converter Fig. 8.32 Chapter 8

36. Parallel-loaded resonant converter Fig. 8.33 Chapter 8

37. AC equivalent circuit of the parallel-loaded resonant converter Fig. 8.34 Chapter 8

38. Control characteristic of the parallel-loaded resonant converter Fig. 8.35 Chapter 8

39. Series-parallel resonant converter Fig. 8.36 Chapter 8

40. Control characteristic of the series-parallel resonant converter Fig. 8.37 Chapter 8

41. Quasi-resonant ZCS buck converter with an L-type full-wave switch Fig. 8.38 Chapter 8