1. 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
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 improvement of 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 has been verified by simulations and experimantal results.
Calculation of uneven phase angles based on the frequency domain representation of the current waveforms goes beyond the previous works in the field.

24. Thank you ! Questions / Discussion

25. Mathematical Derivations – for N phases
Shift phasors with similar magnitudes by 180°
Apply for N-2 phasors with the largest magnitudes
Apply proposed technique with the summed and the remaining phasors

26. Mathematical Derivations
Adjust time/phase - shift accordingly
Waveform is represented in the frequency domain

27. Formulation of minimization problem

28. Formulation of minimization problem

29. Formulation of minimization problem