DC-DC converters with Series Resonance Converter (SRC) topology

1. Zero-Voltage- and Zero-Current-Switching with Series Resonance in FB Converter Utilizing Leakage Inductance Presented by: Guided By: JoemonRaju Joseph K Reg No.- 09HN026 M tech PE & D Dr. S Suresh Kumar (Professor and Head) Dept. of EEE 22-Sep-10 1

2. Overview ZVS and ZCS Literatures on ZV-ZCS Base Paper Concept & Methodology Simulation Summary Proposed Modification References 22-Sep-10 2

3. Overview ZVS and ZCS Literatures on ZV-ZCS Base Paper Concept & Methodology Simulation Summary Proposed Modification References 22-Sep-10 3

4. Zero Voltage Switching &Zero Current Switching 22-Sep-10 4

5. Merits Lossless switching transition Reduced EMI/RFI during switching due to transition Short circuit toleration Reduction in switching stresses 22-Sep-10 5

6. Overview ZVS and ZCS Literatures on ZV-ZCS Base Paper Concept & Methodology Simulation Summary Proposed Modification References 22-Sep-10 6

7. ZCS Circuit Methodology Fig: 1 – Converter with hard switching Auxiliary Circuit Fig:2- Fully resonant auxiliary circuit Reference [5] 22-Sep-10 7

8. ZVS Circuit Methodology Fig:3 FB Converter with ZVS Reference [13] 22-Sep-10 8

9. ZV-ZCS Circuit Methodology Using Additional Auxillary Circuits Fig:4 FB Converter with Auxiliary Voltage Source Reference [11] 22-Sep-10 9

10. Using Series Resonant Converters Fig:5 HB LCL-T ResonantConverter Reference [16] 10 22-Sep-10

11. Preference for ZV-ZCS Topologies ZCS circuits – Auxiliary circuit Conduction losses, voltage stresses in boost diode ZVS circuits – high circulating losses, high valued inductor with increase in power 22-Sep-10 11

12. Choice of IGBT Has lower cost considering high power and high voltage applications . ZVS realizable by adding additional lossless turn off snubber in parallel 22-Sep-10 12

13. Overview ZVS and ZCS Literatures on ZV-ZCS Base Paper Concept & Methodology Simulation Summary Proposed Modification References 22-Sep-10 13

14. ZV-ZCS FB Converter with Secondary Resonance 22-Sep-10 14

15. Concept SRC based circuit Leakage inductance of transformer participates in resonance Turn-on of leading legs possible under all operating conditions and lossless snubber reduces their turn off losses Lagging legs can be turned on at ZV and turned off near ZC without additional aux. circuits 22-Sep-10 15

16. Control Signal Normal PWM Phase Shifted PWM 22-Sep-10 16

19. is(t) = sin ωr(t − t1) x nVin − (Vo − Vc(t1))/Zo …(2) ωr = 2πfr = 1/√(LlkCr) …(angular resonance frequency) Zo = √(Lr/Cr) …(Characteristic Impedance) im(t) = im(t1) + (Vin/Lm) x (t − t1) ….(3) ip(t) = im(t) + nis(t) = iT1(t) = iB2(t) ....(4) 22-Sep-10 19

21. Operation Waveforms t4 t5 t6 t1 t3 to t2 21-Sep-10 21

22. Other Design Factors Frequency Ratio: F = fr/fs Quality Factor: Q =4ωrLlk/Ro tch= (CT1+CB1) x Vin/ (Ip1+ Im2max)… Charging time of Capacitance 21-Sep-10 22

23. Overview ZVS and ZCS Literatures on ZV-ZCS Base Paper Concept & Methodology Simulation Summary Proposed Modification References 21-Sep-10 23

24. Assumptions for Analysis Ideal Switches Ripple free Input Voltage Ideal transformer with magnetizing and leakage inductances alone Frequency ratio, F=1 22-Sep-10 24

25. PSIM Model Control Signal 21-Sep-10 25

26. Model Parameters 21-Sep-10 26

27. Phase Shifted PWM Generation 21-Sep-10 27

28. 21-Sep-10 28

29. Simulation Results Phase Shifted PWM Signals 21-Sep-10 29

30. Simulation Results Switching Currents ZVS ON ZVS ON ZCS OFF 21-Sep-10 30

31. Overview ZVS and ZCS Literatures on ZV-ZCS Base Paper Concept & Methodology Summary Proposed Modification References 21-Sep-10 31

34. Overview ZVS and ZCS Literatures on ZV-ZCS Base Paper Concept & Methodology Methodology Summary Proposed Modification References 21-Sep-10 33

35. Intended Modification Realization of the concept with Bridge rectifier at the transformer secondary. Projected Circuit Configuration 21-Sep-10 34

36. References Eung-Ho Kim and Bong-Hwan Kwon,” Zero-Voltage- and Zero-Current-Switching Full-Bridge Converter With Secondary Resonance”, IEEE Trans. Ind. Electron., vol. 57, no. 3, pp. 1017–1025, Mar. 2010. X. Wu, J. Zhang, X. Ye, and Z. Qian, “Analysis and derivations for a family ZVS converter based on a new active clamp ZVS cell,” IEEE Trans. Ind. Electron., vol. 55, no. 2, pp. 773–781, Feb. 2008. J. J. Lee, J. M. Kwon, E. H. Kim, and B. H. Kwon, “Dual series resonant active-clamp converter,” IEEE Trans. Ind. Electron., vol. 55, no. 2, pp. 699–710, Feb. 2008. C. M. Wang, “A novel ZCS-PWM flyback converter with a simple ZCSPWM commutation cell,” IEEE Trans. Ind. Electron., vol. 55, no. 2, pp. 749–757, Feb. 2008. X. Wu, X. Xie, C. Zhao, Z. Qian, and R. Zhao, “Low voltage and current stress ZVZCS full bridge DC–DC converter using center tapped rectifier reset,” IEEE Trans. Ind. Electron., vol. 55, no. 3, pp. 1470–1477, Mar. 2008. M. Borage, S. Tiwari, and S. Kotaiah, “LCL-T resonant converter with clamp diodes: A novel constant-current power supply with inherent constant-voltage limit,” IEEE Trans. Ind. Electron., vol. 54, no. 2, pp. 741–746, Apr. 2007. 35 21-Sep-10

37. J. T. Matysik, “The current and voltage phase shift regulation in resonant converters with integration control,” IEEE Trans. Ind. Electron., vol. 54, no. 2, pp. 1240–1242, Apr. 2007. E. Adib and H. Farzanehfard, “Family of zero-current transition PWM converters,” IEEE Trans. Ind. Electron., vol. 55, no. 8, pp. 3055–3063, Aug. 2008. E. H. Kim and B. H. Kwon, “High step-up push-pull converter with high efficiency,” IET Power Electron., vol. 2, no. 1, pp. 79–89, Jan. 2009. Y. Tsuruta, Y. Ito, and A. Kawamura, “Snubber-assisted zero-voltage and zero-current transition bilateral buck and boost chopper for EV drive application and test evaluation at 25 kW,” IEEE Trans. Ind. Electron., vol. 56, no. 1, pp. 4–11, Jan. 2009. J. L. Russi, M. L. S. Martins, and H. L. Hey, “Coupled-filter-inductor soft-switching techniques: Principles and topologies,” IEEE Trans. Ind. Electron., vol. 55, no. 9, pp. 3361–3373, Sep. 2009. T. Citko and S. Jalbrzykowski, “Current-fed resonant full-bridge boost DC/AC/DC converter,” IEEE Trans. Ind. Electron., vol. 55, no. 3, pp. 1198–1205, Mar. 2008. Yungtaek Jang, Milan M. Jovanovic and Yu-Ming Chang, ”A New ZVS-PWM Full-Bridge Converter,” IEEE Trans. Power Electronics, Vol. 18, No. 5,pp.1122-1129, Sep 2003 21-Sep-10 36