CONTACTLESS POWER TRANSFER SYSTEM
First Claim
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1. A contactless power transfer system comprising:
- a power exchanging coil configured to exchange power via a magnetic field;
a field focusing element for focusing the magnetic field; and
a compensation coil having a resonance frequency different from a resonance frequency of the field focusing element for matching an impedance of the contactless power transfer system and compensating a change in phase resulting from a misalignment of the contactless power transfer system.
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Abstract
A contactless power transfer system comprising a power exchanging coil configured to exchange power via a magnetic field, a field focusing element for focusing the magnetic field, and a compensation coil having a resonance frequency different from a resonance frequency of the field focusing element for matching an impedance of the contactless power transfer system and compensating a change in phase resulting from a misalignment in the contactless power transfer system.
18 Citations
18 Claims
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1. A contactless power transfer system comprising:
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a power exchanging coil configured to exchange power via a magnetic field; a field focusing element for focusing the magnetic field; and a compensation coil having a resonance frequency different from a resonance frequency of the field focusing element for matching an impedance of the contactless power transfer system and compensating a change in phase resulting from a misalignment of the contactless power transfer system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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a first power exchanging coil; a contactless power transfer system coupled to the first power exchanging coil, wherein the contactless power transfer system exchanges power with the first power exchanging coil via a magnetic field, wherein the contactless power transfer system comprises; a second power exchanging coil configured to exchange power via the magnetic field; a field focusing element for focusing the magnetic field; and a compensation coil having a resonance frequency different from a resonance frequency of the field focusing element for matching an impedance of the contactless power transfer system and compensating a change in phase resulting from a misalignment of the contactless power transfer system with respect to the first power exchanging coil. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method comprising:
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generating a magnetic field from power received from a power source; focusing the magnetic field onto a power exchanging coil by a field focusing element; and compensating a change in phase and matching impedance using a compensation coil for enhancing power exchanging capability of the power exchanging coil, wherein the compensation coil comprises a resonant frequency different from a resonance frequency of the field focusing element.
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Specification