Wireless power transfer system and wireless power transfer method
First Claim
1. A wireless power transfer system comprising:
- a first transmitter coil, a second transmitter coil, and a third transmitter coil arranged such that normal directions to planes of the first, the second and the third transmitter coils are orthogonal to each other in a three-dimensional space, anda controller that controls electric currents supplied to the first transmitter coil, the second transmitter coil and the third transmitter coil such that a synthetic magnetic field vector produced by the first transmitter coil, the second transmitter coil and the third transmitter coil rotates in a plane of rotation at a first angular frequency “
ω
”
, and that a normal vector to the plane of rotation rotates about an axis of rotation perpendicular to the normal vector at a second angular frequency “
a”
equal to or smaller than the first angular frequency,wherein the controller controls a first power source connected to the first transmitter coil to modulate a non-oscillating magnitude (H0) of a magnetic field vector with −
sin(at)*cos(ω
t), controls a second power source connected to the second transmitter coil to modulate the non-oscillating magnitude (H0) of the magnetic field vector with cos(at)*cos(ω
t), and controls a third power source connected to the third transmitter coil to modulate the non-oscillating magnitude (H0) of the magnetic field vector with α
*sin(ω
t), and wherein a point of the synthetic magnetic field vector continuously moves on a sphere or a spheroid.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless power transfer system includes a first transmitter coil, a second transmitter coil and a third transmitter coil arranged such that normal directions to planes of the first, the second and the third transmitter coils are orthogonal to each other in a three-dimensional space, and a controller that controls electric currents supplied to the first, the second and the third transmitter coils such that a synthetic magnetic field vector produced by the first, the second and the third transmitter coils rotates in a plane of rotation at a first angular frequency “ω”, and that a normal vector to the plane of rotation rotates about an axis of rotation perpendicular to the normal vector at a second angular frequency “a” equal to or smaller than the first angular frequency (a≤ω).
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Citations
14 Claims
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1. A wireless power transfer system comprising:
-
a first transmitter coil, a second transmitter coil, and a third transmitter coil arranged such that normal directions to planes of the first, the second and the third transmitter coils are orthogonal to each other in a three-dimensional space, and a controller that controls electric currents supplied to the first transmitter coil, the second transmitter coil and the third transmitter coil such that a synthetic magnetic field vector produced by the first transmitter coil, the second transmitter coil and the third transmitter coil rotates in a plane of rotation at a first angular frequency “
ω
”
, and that a normal vector to the plane of rotation rotates about an axis of rotation perpendicular to the normal vector at a second angular frequency “
a”
equal to or smaller than the first angular frequency,wherein the controller controls a first power source connected to the first transmitter coil to modulate a non-oscillating magnitude (H0) of a magnetic field vector with −
sin(at)*cos(ω
t), controls a second power source connected to the second transmitter coil to modulate the non-oscillating magnitude (H0) of the magnetic field vector with cos(at)*cos(ω
t), and controls a third power source connected to the third transmitter coil to modulate the non-oscillating magnitude (H0) of the magnetic field vector with α
*sin(ω
t), and wherein a point of the synthetic magnetic field vector continuously moves on a sphere or a spheroid. - View Dependent Claims (2, 3, 4, 5, 11, 12)
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6. A wireless power transfer method comprising:
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setting a first transmitter coil, a second transmitter coil, and a third transmitter coil such that normal directions to planes of the first, the second and the third transmitter coils are orthogonal to each other in a three-dimensional space; placing a power receiver in the three-dimensional space formed by the first transmitter coil, the second transmitter coil, and the third transmitter coil; and controlling electric currents supplied to the first transmitter coil, the second transmitter coil and the third transmitter coil such that a synthetic magnetic field vector produced by the first transmitter coil, the second transmitter coil and the third transmitter coil rotates in a plane of rotation at a first angular frequency “
ω
”
, and that a normal vector to the plane of rotation rotates about an axis of rotation perpendicular to the normal vector at a second angular frequency “
a”
equal to or smaller than the first angular frequency,wherein the controller controls a first power source connected to the first transmitter coil to modulate a non-oscillating magnitude (H0) of a magnetic field vector with −
sin(at)*cos(ω
t), controls a second power source connected to the second transmitter coil to modulate the non-oscillating magnitude (H0) of the magnetic field vector with cos(at)*cos(ω
t), and controls a third power source connected to the third transmitter coil to modulate the non-oscillating magnitude (H0) of the magnetic field vector with α
*sin(ω
t), and wherein a point of the synthetic magnetic field vector continuously moves on a sphere or a spheroid. - View Dependent Claims (7, 8, 9, 10, 13, 14)
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Specification