In this thesis, coupled inductors have been applied to multiphase DC-DC converters.
Detailed analysis has been done to investigate the benefits of directly coupled inductors
and inversely coupled inductors, compared to conventional uncoupled inductors. In
general, coupled inductors for multiphase DC-DC converters have inherent benefits such
as excellent current sharing characteristics, immunity to component tolerance and
reduction in current control complexity. Specifically, by employing directly coupled
inductors for multiphase DC-DC converters, overall current ripple can be effectively
reduced, compared to that of uncoupled inductors. For inversely coupled inductors, phase
current ripple can be reduced if operating points and coupling coefficients are carefully
chosen. As for small-signal characteristics, inversely coupled inductors have the
advantages of broadening the bandwidth of multiphase DC-DC converters and being
more immune to load variation at low frequencies. On the other hand, directly coupled
inductors have the benefit of low sensitivity to input variation at high frequencies. In
addition, the proposed new structure for multiphase DC-DC converters has excellent
current sharing performance and reduced current ripple. Computer simulations have been
done and hardware prototypes have been built to validate the concepts.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/5962 |
| Date | 17 September 2007 |
| Creators | Shi, Meng |
| Contributors | Enjeti,Prasad |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | 699431 bytes, electronic, application/pdf, born digital |
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