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Mitigation of Gap Losses in Nanocrystalline Tape-Wound Cores.
- Source :
- IEEE Transactions on Power Electronics; May2018, Vol. 34 Issue 5, p4656-4664, 9p
- Publication Year :
- 2019
-
Abstract
- A split-core technique is proposed to mitigate the gap losses in high-frequency nanocrystalline cores, which enables significant size reductions in thermally limited designs. Finite element analysis is used to examine the gap loss dependence on core width D revealing a nonlinear relationship of the form loss ∝ $D^{\alpha }$. α is approximately constant for frequencies of 10–200 kHz over the range of core widths typically used in power electronics, but α increases with gap length. Splitting the core into a number of subcores can therefore provide significant reductions in gap loss, especially with larger gap lengths. The results from a 300-A (peak), 200-A (continuous) inductor show that with three subcores and a gap length of 4 mm, the gap losses are reduced by 50%, and the hot-spot temperature is reduced by 24.5 °C. Using the technique it is estimated that the original inductor weight could be reduced by 40% with four split cores, making a significant impact on converter power density. [ABSTRACT FROM AUTHOR]
- Subjects :
- FINITE element method
ADHESIVE tape
POWER electronics
POWER density
Subjects
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 34
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 135773653
- Full Text :
- https://doi.org/10.1109/TPEL.2018.2863665