期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 36, 期 9, 页码 9955-9969出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3064902
关键词
Magnetic cores; Ferrites; Bars; Saturation magnetization; Permeability; Ribs; Inductance; Inductive power transfer (IPT); magnetic cores; magnetic materials; nanocrystalline ribbon
资金
- U.K. Engineering and Physical Sciences Research Council (EPSRC) [EP/R036799/1]
- Companhia Brasileira de Metalurgia e Mineracao (CBMM) [G105565]
- EPSRC [EP/R036799/1] Funding Source: UKRI
Nanocrystalline alloys are being considered as an alternative to ferrite magnetic cores in inductive power transfer systems due to their superior properties. This article presents special considerations and methods for designing nanocrystalline ribbon cores, showing that they outperform ferrite cores in terms of magnetic performance, efficiency, and power density.
Nanocrystalline alloys have been recently considered as an alternative to ferrite as the magnetic cores in inductive power transfer systems due to their superior properties such as higher saturation flux density and permeability. They are also less brittle, more stable to temperature variations, and have a higher thermal conductivity. To take advantage of these properties, a dedicated design approach is required, different from the one used for ferrite cores. In this article, special considerations and methods for the design of nanocrystalline ribbon cores are presented. An 11.1-kW pad is designed and compared with one with identical ferrite cores. Results show that IPT pads with nanocrystalline ribbon cores yield superior magnetic performance in terms of inductances and coupling factors. Higher efficiency and power density were also achieved with the proposed design. Furthermore, compared to ferrite-based pads, they showed lower leakage flux and a superior stability to temperature variations.
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