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Marcel Schuck , Robert C. N. Pilawa-Podgurski mschuck2@illinois.edu

Current ripple cancellation for asymmetric multiphase interleaved dc-dc switching converters with applications in solar photovoltaics. Marcel Schuck , Robert C. N. Pilawa-Podgurski mschuck2@illinois.edu. ECE 590I. Table of contents. Introduction Mathematical Derivations

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Marcel Schuck , Robert C. N. Pilawa-Podgurski mschuck2@illinois.edu

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  1. Current ripple cancellation for asymmetric multiphase interleaved dc-dc switching converters with applications in solar photovoltaics Marcel Schuck, Robert C. N. Pilawa-Podgurski mschuck2@illinois.edu ECE 590I

  2. Table of contents • Introduction • Mathematical Derivations • Performance Verification by Simulation • Experimental Results • Conclusions • Questions/Discussion

  3. Introduction • Fields of application for asymmetric multiphase converters

  4. Introduction • Fields of application for asymmetric multiphase converters

  5. Introduction • Fields of application for asymmetric multiphase converters

  6. Introduction • The concept of interleaving

  7. Mathematical Derivations • Inductor- and input current waveforms

  8. Mathematical Derivations

  9. Mathematical Derivations

  10. Mathematical Derivations

  11. Mathematical Derivations

  12. Mathematical Derivations time domain frequency domain

  13. Mathematical Derivations

  14. Mathematical Derivations

  15. Performance Verification by Simulation

  16. Performance Verification by Simulation • Relative improvementof 43%

  17. Experimental Results

  18. Experimental Results

  19. Experimental Results

  20. Experimental Results

  21. Experimental Results

  22. Experimental Results

  23. Conclusions • Control strategy that enables improved ripple cancellation for multiphase converters with asymmetric operating conditions has been presented. • Performance hasbeenverifiedbysimulationsandexperimantalresults. • Calculationofunevenphaseanglesbased on thefrequencydomainrepresentationofthecurrentwaveformsgoesbeyondthepreviousworks in thefield.

  24. Thankyou !Questions / Discussion

  25. Mathematical Derivations – for N phases • Shift phasors with similar magnitudes by 180° • Applyfor N-2 phasorswiththelargestmagnitudes • Applyproposedtechniquewiththesummedandtheremainingphasors

  26. Mathematical Derivations • Adjust time/phase - shift accordingly • Waveformisrepresented in thefrequencydomain

  27. Formulationofminimizationproblem

  28. Formulationofminimizationproblem

  29. Formulationofminimizationproblem

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