Wireless power transfer system
First Claim
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1. A wireless power transmitter comprising:
- at least two loops;
separate drivers, each driving a respective one of the loops and providing a respective alternating current to the respective loop, thereby to transmit wireless power for receipt by at least one wireless power receiver; and
a controller for coordinated current control of the drivers such that a magnetic field vector is generated by the respective alternating currents and is controllable to point in one or more of any direction in two-dimensional or three-dimensional space thereby transmitting wireless power in one or more predetermined directions in two-dimensional or three-dimensional space.
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Abstract
The present invention provides a wireless power transmitter comprising at least two loops, and separate drivers, each driving a respective one of the loops and providing a respective alternating current to the respective loop, thereby to transmit wireless power for receipt by at least one wireless power receiver. Also provided is a wireless power receiver comprising a receiver loop, and at least two focusing loops. An associated system and an associated method are also provided.
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Citations
19 Claims
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1. A wireless power transmitter comprising:
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at least two loops; separate drivers, each driving a respective one of the loops and providing a respective alternating current to the respective loop, thereby to transmit wireless power for receipt by at least one wireless power receiver; and a controller for coordinated current control of the drivers such that a magnetic field vector is generated by the respective alternating currents and is controllable to point in one or more of any direction in two-dimensional or three-dimensional space thereby transmitting wireless power in one or more predetermined directions in two-dimensional or three-dimensional space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A wireless power receiver comprising:
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a receiver loop wound around a receiver loop axis and defining a receiver loop plane, the receiver loop plane having a receiving side for receiving wireless power; at least two focusing loops, each focusing loop defining a respective focusing loop plane, the focusing loops arranged on the receiving side adjacent the loop axis and uniformly around the loop axis with the focusing loop planes tilted towards the receiver loop plane. - View Dependent Claims (17, 18)
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19. A wireless power transmission system comprising:
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a wireless power transmitter comprising; at least two loops; separate drivers, each driving a respective one of the loops and providing a respective alternating current to the respective loop, thereby to transmit wireless power for receipt by at least one wireless power receiver; and a controller for coordinated current control of the drivers such that a magnetic field vector is generated by the respective alternating currents and is controllable to point in one or more of any direction in two-dimensional or three-dimensional space thereby transmitting wireless power in one or more predetermined directions in two-dimensional or three-dimensional space; and the at least one wireless power receiver comprising; a receiver loop wound around a receiver loop axis and defining a receiver loop plane, the receiver loop plane having a receiving side for receiving wireless power; at least two focusing loops, each focusing loop defining a respective focusing loop plane, the focusing loops arranged on the receiving side adjacent the loop axis and uniformly around the loop axis with the focusing loop planes tilted towards the receiver loop plane.
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Specification