Uniform magnetic field transmitter
First Claim
Patent Images
1. A non-transitory computer readable medium for determining horizontal and vertical turn distributions of a wireless charging coil, when executed by a computing device, cause the computing device to perform operations, comprising:
- setting a number of turns (N) of the wireless charging coil equal to 0 and a parameter g equal to 0;
calculating an initial turn distribution of the wireless charging coil;
adjusting a horizontal turn distribution of the wireless charging coil;
setting a vertical turn distribution of the wireless charging coil;
removing redundant turns of the wireless charging coil;
setting a depth (d) of the wireless charging coil equal to 0;
determining if a uniformity factor of the wireless charging coil satisfies a predetermined requirement;
determining if the depth d<
a maximum depth (dmax)/N, in response to the uniformity factor not satisfying the predetermined requirement;
incrementing a value of d in response to d<
a maximum depth (dmax)/N;
determining if g<
20, in response to d not less than dmax/N;
incrementing a value of g, in response to g<
20;
incrementing a value of N, in response to g not less than 20;
determining horizontal and vertical turn distribution of the wireless charging coil, in response to the uniformity factor satisfying the predetermined requirement; and
displaying the horizontal and vertical turn distribution of the wireless charging coil to a user.
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Abstract
A system for wirelessly charging an electric vehicle comprises a wireless charging coil having a first end, a second end, and a plurality of turns. The first end has a first turn having a first radius r1 and the second end has an Nth turn having an Nth radius rN, rN<r1 such that the wireless charging coil is funnel shaped,
- where, an ascending distance between each adjacent turn of the wireless charging coil is:
Δ′j,j+1=Δj+i−3,j+i−2+(Δ′34−Δi,i+1), for j≥4 and r′j+1>0 - where,
- Δ′j,j+1=r′j−r′j+1 is the distance between adjacent turns,
- σ is between 0.05% and 0.2%,
- i is 2 to N;
- j is 1 to N; and
- Δ′34 is an ascending distance between the third turn and the fourth turn.
- where, an ascending distance between each adjacent turn of the wireless charging coil is:
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Citations
12 Claims
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1. A non-transitory computer readable medium for determining horizontal and vertical turn distributions of a wireless charging coil, when executed by a computing device, cause the computing device to perform operations, comprising:
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setting a number of turns (N) of the wireless charging coil equal to 0 and a parameter g equal to 0; calculating an initial turn distribution of the wireless charging coil; adjusting a horizontal turn distribution of the wireless charging coil; setting a vertical turn distribution of the wireless charging coil; removing redundant turns of the wireless charging coil; setting a depth (d) of the wireless charging coil equal to 0; determining if a uniformity factor of the wireless charging coil satisfies a predetermined requirement; determining if the depth d<
a maximum depth (dmax)/N, in response to the uniformity factor not satisfying the predetermined requirement;incrementing a value of d in response to d<
a maximum depth (dmax)/N;determining if g<
20, in response to d not less than dmax/N;incrementing a value of g, in response to g<
20;incrementing a value of N, in response to g not less than 20; determining horizontal and vertical turn distribution of the wireless charging coil, in response to the uniformity factor satisfying the predetermined requirement; and displaying the horizontal and vertical turn distribution of the wireless charging coil to a user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for wirelessly charging an electric vehicle, comprising;
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a wireless charging coil having a first end, a second end, and a plurality of turns, the first end having a first turn and the second end having an Nth turn, the first turn having a first radius r1 and the Nth turn having an Nth radius rN, rN<
r1 such that the wireless charging coil is funnel shaped,wherein, an ascending distance between each adjacent turn of the wireless charging coil is;
Δ
′
j,j+1=Δ
j+i−
3,j+i−
2+(Δ
′
34−
Δ
i,i+1),for j≥
4andr′
j+1>
0wherein, Δ
′
j,j+1=r′
j−
r′
j+1 is the distance between adjacent turns,i is 2 to N; j is 1 to N; Δ
′
34 is an ascending distance between the third turn and the fourth turnΔ
j+i−
3,j+i−
2 is the distance between adjacent turns; andΔ
i,i+1 is the distance between adjacent turns. - View Dependent Claims (10, 11, 12)
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Specification