US 11,936,199 B2
Polyphase wireless power transfer systems, coil assemblies and resonant networks
Jason L. Pries, Oak Ridge, TN (US); Veda Prakash Galigekere, Oak Ridge, TN (US); and Gui-Jia Su, Oak Ridge, TN (US)
Assigned to UT-BATTELLE, LLC, Oak Ridge, TN (US)
Appl. No. 17/420,486
Filed by UT-Battelle, LLC, Oak Ridge, TN (US)
PCT Filed Jan. 2, 2020, PCT No. PCT/US2020/012074
§ 371(c)(1), (2) Date Jul. 2, 2021,
PCT Pub. No. WO2020/142621, PCT Pub. Date Jul. 9, 2020.
Claims priority of provisional application 62/938,476, filed on Nov. 21, 2019.
Claims priority of provisional application 62/787,401, filed on Jan. 2, 2019.
Prior Publication US 2022/0085652 A1, Mar. 17, 2022
Int. Cl. H02J 50/12 (2016.01); H01F 38/14 (2006.01); H01F 27/38 (2006.01)
CPC H02J 50/12 (2016.02) [H01F 38/14 (2013.01); H01F 27/38 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A polyphase inductive power transfer system comprising:
a transmitter comprising:
at least one coil associated with each phase; and
compensating capacitance connected in series with the at least one coil for each phase, a value of the compensating capacitance for each phase is determined such that the transmitter has at least two independently excitable resonant modes at a resonant frequency wherein a maximum magnetic flux density is in a different spatial location in the at least two independently excitable resonant modes.