US 12,168,397 B2
Charging frequency determination for wireless power transfer
Christopher A. Magner, Lancaster, PA (US)
Assigned to InductEV, Inc., King of Prussia, PA (US)
Filed by InductEV, Inc., King of Prussia, PA (US)
Filed on Dec. 10, 2021, as Appl. No. 17/643,764.
Prior Publication US 2023/0182588 A1, Jun. 15, 2023
Int. Cl. H02J 7/00 (2006.01); B60L 53/12 (2019.01); H02J 50/12 (2016.01); H02J 50/80 (2016.01); H04B 5/26 (2024.01); H04B 5/79 (2024.01)
CPC B60L 53/12 (2019.02) [H02J 7/00034 (2020.01); H02J 50/12 (2016.02); H02J 50/80 (2016.02); H04B 5/26 (2024.01); H04B 5/79 (2024.01)] 32 Claims
OG exemplary drawing
 
1. A method for determining a charging frequency between a transmitting coil and a receiving coil of a wireless power transfer (WPT) system, comprising:
setting an input voltage to the transmitting coil at a fixed voltage;
shunting the receiving coil;
determining a first input current frequency range in which a resonant frequency is expected to be found;
frequency polling within the first input current frequency range using a set of polling frequencies in the first input current frequency range; and
selecting as the charging frequency a polling frequency having a lowest input current.