A novel resonator for robust lateral-misalignment of magnetic resonance wireless power link

Ahn, Chi‐Hyung; Kim, Ki Young; Ryu, Young-Ho; Song, Ki‐Hoon; Park, Jaehyun; Park, Eunseok; Park, Yun-Kwon; Kwon, Soon Jae

doi:10.1109/aps.2013.6711081

Cited by 1 publication

(1 citation statement)

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“…To increase the tolerance to misalignment and maintain stable transfer power, many methods were proposed. In respect of coil structure, the four-coil coupled system [13], hybrid resonant coil [14] and orthogonal windings [15] have been used to improve the misalignment tolerance. On the other hand, kinds of circuit topologies were also put forward to regulate transfer power fluctuation.…”

Section: Introductionmentioning

confidence: 99%

Optimisation design for series–series dynamic WPT system maintaining stable transfer power

Wang

Chen

et al. 2017

IET Power Electronics

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In amount of practical applications of wireless power transfer (WPT), charging electric vehicles (EVs) has attracted much attention. Dynamic WPT is considered as a solution to the problem of battery bottleneck and the difficulty of convenient charging encountered in the development of EV. However, the transfer power can hardly be maintained stable under large coil misalignment in movement. What is more, the transfer efficiency will decline correspondingly. A method of optimisation design is presented from the perspective of against misalignment for dynamic series-series (SS) WPT system. The primary compensation capacitance is well designed to regulate transfer power fluctuation in WPT system. Then the optimal load is matched by DC-DC converter to guarantee the highest average transfer efficiency. A secondary-only resonant SS WPT system with fixed frequency is finally built. The power transfer profile is smooth against coupling coefficient to realise high tolerance to position as the power drop (raise) percentage is no more than 10% (20%) within 200% variation of coupling coefficient for different loads. Meanwhile, the efficiency can always be maintained at a high level.

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Section: Introductionmentioning

confidence: 99%