US 11,881,726 B2
Shielding system for wireless power transfer
Mostak Mohammad, Oak Ridge, TN (US); Omer C. Oner, Oak Ridge, TN (US); and Jason L Pries, Oak Ridge, TN (US)
Assigned to UT-Battelle, LLC, Oak Ridge, TN (US)
Filed by UT-Battelle, LLC, Oak Ridge, TN (US)
Filed on Jan. 28, 2022, as Appl. No. 17/587,265.
Claims priority of provisional application 63/145,000, filed on Feb. 3, 2021.
Claims priority of provisional application 63/143,071, filed on Jan. 29, 2021.
Prior Publication US 2022/0247233 A1, Aug. 4, 2022
Int. Cl. H02J 50/70 (2016.01); H02J 50/10 (2016.01); H02J 50/40 (2016.01); B60L 53/126 (2019.01); H01F 38/14 (2006.01); H01F 27/36 (2006.01); H02J 50/00 (2016.01); H02J 50/90 (2016.01); H02J 50/12 (2016.01); B60L 53/36 (2019.01)
CPC H02J 50/70 (2016.02) [B60L 53/126 (2019.02); B60L 53/36 (2019.02); H01F 27/36 (2013.01); H01F 38/14 (2013.01); H02J 50/005 (2020.01); H02J 50/10 (2016.02); H02J 50/12 (2016.02); H02J 50/402 (2020.01); H02J 50/90 (2016.02)] 10 Claims
OG exemplary drawing
 
1. A three-phase wireless power transfer (3φ-WPT) system for wirelessly providing high-frequency AC power to an electric vehicle or a plug-in electric vehicle, the system comprising:
an off-board transmitter comprising:
a transmitter pad configured to wirelessly transmit the high-frequency AC power, the transmitter pad being hexagonally shaped and comprising three bipolar coils backed by a core;
an on-board receiver including:
a receiver pad configured to receive the high-frequency AC power when the transmitter pad and the receiver pad are disposed adjacent to each other and spaced apart through a gap, the receiver pad being hexagonally shaped and comprising three bipolar coils backed by a core, and
a magnetic material-based shield disposed on a core side of the receiver pad that opposes the gap, wherein the magnetic material-based shield comprises primary, secondary, and tertiary layers of high-permeability magnetic material,
wherein the primary layer is disposed nearest the core side of the receiver pad, is circularly shaped to inscribe the receiver pad, and has an area similar to an area of the receiver pad's core and a thickness that is 20%-60% of a thickness of the receiver pad's core,
wherein the secondary layer is rectangularly shaped to inscribe the primary layer, the secondary layer's area is larger than the primary layer's area, and the secondary layer's thickness is less than the primary layer's thickness, and
wherein, the tertiary layer's area is larger than the secondary layer's area, and the tertiary layer's thickness is less than the secondary layer's thickness.