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Maximising inductive power transmission using a novel analytical coil design approach.

Heidarian, Maryam; Burgess, Samuel J.; Prabhu, Radhakrishna; Fough, Nazila


Maryam Heidarian

Samuel J. Burgess


Maximising power transfer efficiency (PTE) in resonant inductive power transfer (IPT) systems requires strong coupling between transmitter and receiver coils. In applications where system constraints yield a weak inductive link (e.g. significant distance between coils) or there is a requirement for a specific power level, then geometrically optimising the coils can enhance inductive linkage. To achieve this, a novel coil design method has been presented which provides maximum efficiency for both strongly- and loosely-coupled inductive links. A parameter (i.e. "Strong Coupling Factor") has been introduced to assist the design procedure. Discussing results from a practical 1.06 MHz inductive link - developed using the proposed design method - shows that, with proper selection of strong coupling factor (e.g. C=220), the designed coil geometry can provide maximum PTE of 86%. This is in close correlation (F ≈ 3%) with theoretical analysis using MATLAB.

Start Date Jun 18, 2019
Publication Date Dec 31, 2019
Publisher Institute of Electrical and Electronics Engineers
Pages 158-161
Series Title Wireless power transfer conference proceedings
Series Number 2019
Series ISSN 2573-7651
ISBN 9781728107066
Institution Citation HEIDARIAN, M., BURGESS, S.J., PRABHU, R. and FOUGH, N. 2019. Maximising inductive power transmission using a novel analytical coil design approach. In Proceedings of the 2019 IEEE MTT-S wireless power transfer conference (WPTC 2019), co-located with the 2019 IEEE PELS workshop on emerging technologies: wireless power (WoW 2019) as part of Wireless power week 2019, 18-21 June 2019, London, UK. New York: IEEE [online], pages 158-161. Available from:
Keywords Inductive power transfer; Power transfer efficiency; Coil design