US 12,088,115 B2
High efficiency resonator coils for large gap wireless power transfer systems
Tiefeng Shi, San Jose, CA (US); and Paul Wiener, Pleasanton, CA (US)
Assigned to GAN SYSTEMS INC., Ottawa (CA)
Filed by GAN SYSTEMS INC., Ottawa (CA)
Filed on Oct. 25, 2023, as Appl. No. 18/494,505.
Application 18/494,505 is a division of application No. 17/094,061, filed on Nov. 10, 2020.
Claims priority of provisional application 62/947,144, filed on Dec. 12, 2019.
Prior Publication US 2024/0186831 A1, Jun. 6, 2024
Int. Cl. H02J 50/12 (2016.01); H01F 38/14 (2006.01)
CPC H02J 50/12 (2016.02) [H01F 38/14 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method of configuring a resonator coil, comprising:
obtaining a population of parameters (a1, b1, . . . an, bn)initial defining an initial (reference) coil topology to be optimized, the population of parameters (a1, b1, . . . an n, bn)initial defining comprising: a maximum coil dimension, a number of turns, a minimum spacing between turns, a minimum trace with, et al. for each turn;
obtaining a target specification, comprising:
selecting a gap distance Dgap from the coil to a charging surface;
selecting a charging area Areacharging of the charging surface relative to an area of the coil Areacoil;
selecting a Figure of Merit (FOM) which is derived from a vertical magnetic field distribution Hz over the charging area Areacharging of the charging surface at gap distance Dgap from the coil;
a) for the initial population of parameters (a1, b1 . . . an, bn), computing the vertical magnetic field distribution Hz over the charging plane;
b) computing the FOM based on a fitness function F(Hz) over said area of the charging plane;
c) systematically changing the population of parameters, and for each of a plurality of m populations of parameters (a1, b1 . . . an, bn)m where m=2 to m=M, computing Hz over the charging plane and computing the fitness function F(Hz)m over the charging plane;
d) when the value of the fitness function F(Hz) for an mth population of parameters (a1, b1 . . . an, bn)m meets a target specification, storing the mth population of parameters (a1, b1 an, bn)m as a target population of parameters; and
e) outputting the set of parameters (a1, b1 . . . an, bn)m corresponding to the target value of the fitness function F(Hz), to define a coil topology meeting the target specification having a coil distribution comprising said dimensions, trace widths and spacings of each of the n turns.