This work demonstrates the feasibility of size-adjustable coils to minimize the reduction of the transfer efficiency due to the lateral misalignment between the source and load coils in a resonant-type wireless power transfer system. Experimental results for a 6.78 MHz system reveals that by reducing the size of the coil adaptively according to the misalignment, the transfer efficiency can be maintained above 80% even when effective overlapping area is reduced to 11.5% between a 20 × 20 cm2 coil pair. Moreover, the proposed coil system successfully removes the transfer null caused by a large misalignment. The proposed virtual system is expected to maintain the transfer efficiency higher than 40% even when the misalignment is such that one coil is completely outside the other.
|Title of host publication||2018 IEEE Wireless Power Transfer Conference, WPTC 2018|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Publication status||Published - 2019 Feb 11|
|Event||2018 IEEE Wireless Power Transfer Conference, WPTC 2018 - Montreal, Canada|
Duration: 2018 Jun 3 → 2018 Jun 7
|Name||2018 IEEE Wireless Power Transfer Conference, WPTC 2018|
|Conference||2018 IEEE Wireless Power Transfer Conference, WPTC 2018|
|Period||18/6/3 → 18/6/7|
Bibliographical noteFunding Information:
ACKNOWLEDGMENT This work was supported by the Korea Evaluation Institute of Industrial Technology(KEIT) Research Grant of 2017(’10047815’).
This work was supported by the Korea Evaluation Institute of Industrial Technology(KEIT) Research Grant of 2017('10047815').
All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering