Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 60, Issue 1, Pages 339-349Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2011.2179275
Keywords
Mixed-resonant coupling; relative distance; transfer efficiency; wireless power transfer (WPT)
Categories
Funding
- National Science Foundation of China [60990320, 60990324, 60871016, 60496317, 60901011]
- 111 Project [111-2-05]
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Since the magnetically resonant coupling was suggested for wireless power transfer (WPT), the theoretical analysis and experimental verifications of several resonant coupling structures have been investigated by several groups. Series-resonant and shunt-resonant structures are two common circuit models which are widely used in WPT. Here, a simple circuit topological structure, the series-shunt mixed-resonant coupling, is presented with better performance in the transfer distance and efficiency. In the experimental verification, a pair of resonant coils with 10-cm diameter was used. The experimental results show that high efficiency of 85% was achieved at a distance of 10 cm (one relative distance) and 45% efficiency at 20 cm (two relative distances). The proposed structure has another advantage that circuit parameters can be easily optimized for high transfer efficiency under different distances.
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