US 11,756,727 B2
Wireless power transfer coupling structures with reduced leakage flux
Grant Anthony Covic, Auckland (NZ); and Matthew Geoffrey Seymour Pearce, Whangarei (NZ)
Assigned to AUCKLAND UNISERVICES LIMITED, Auckland (NZ)
Appl. No. 17/280,623
Filed by AUCKLAND UNISERVICES LIMITED, Auckland (NZ)
PCT Filed Sep. 30, 2019, PCT No. PCT/IB2019/058274
§ 371(c)(1), (2) Date Mar. 26, 2021,
PCT Pub. No. WO2020/065631, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 746841 (NZ), filed on Sep. 28, 2018.
Prior Publication US 2022/0044868 A1, Feb. 10, 2022
Int. Cl. H01F 38/14 (2006.01); H01F 27/36 (2006.01); H02J 50/12 (2016.01); H02J 50/40 (2016.01); H02J 50/70 (2016.01); B60L 53/12 (2019.01); H01F 27/38 (2006.01)
CPC H01F 38/14 (2013.01) [B60L 53/12 (2019.02); H01F 27/36 (2013.01); H01F 27/363 (2020.08); H01F 27/38 (2013.01); H02J 50/12 (2016.02); H02J 50/40 (2016.02); H02J 50/70 (2016.02)] 33 Claims
OG exemplary drawing
 
1. A wireless coupling apparatus comprising:
a first layer comprising a flux coupling coil having two opposing end regions separated by two opposing side regions;
a second layer comprising a first block of highly magnetically permeable material and a second block of highly magnetically permeable material; and
a third layer comprising a leakage flux control coil, wherein
the first block is provided proximate to one of the end regions and the second block is provided proximate to the other of the end regions.