Contactless power transfer system
First Claim
Patent Images
1. A contactless power transfer system comprising:
- a power exchanging coil configured to exchange power with a transmitter power coil via a magnetic field;
a field focusing element for receiving the magnetic field from the transmitter power coil and focusing the magnetic field onto the power exchanging coil, the field focusing element having a resonance frequency that is the same as a resonance frequency of the transmitter power coil; and
a compensation coil coupled to the power exchanging coil such that the power exchanging coil is positioned between the field focusing element and the compensation coil, the compensation coil having a compensation coil capacitor and a resonance frequency different from the 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 power exchanging coil and the transmitter power coil.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
18 Claims
-
1. A contactless power transfer system comprising:
-
a power exchanging coil configured to exchange power with a transmitter power coil via a magnetic field; a field focusing element for receiving the magnetic field from the transmitter power coil and focusing the magnetic field onto the power exchanging coil, the field focusing element having a resonance frequency that is the same as a resonance frequency of the transmitter power coil; and a compensation coil coupled to the power exchanging coil such that the power exchanging coil is positioned between the field focusing element and the compensation coil, the compensation coil having a compensation coil capacitor and a resonance frequency different from the 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 power exchanging coil and the transmitter power coil. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system comprising:
-
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 with the first power exchanging coil via the magnetic field; a field focusing element for receiving the magnetic field from the transmitter power coil and focusing the magnetic field onto the power exchanging coil, the field focusing element having a resonance frequency that is the same as a resonance frequency of the first power exchanging coil; and a compensation coil coupled to the power exchanging coil such that the power exchanging coil is positioned between the field focusing element and the compensation coil, the compensation coil having a compensation coil capacitor and a resonance frequency different from the 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 second power exchanging coil with respect to the first power exchanging coil. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method comprising:
-
generating a magnetic field from power received from a first power exchanging coil; receiving the magnetic field from the transmitter power coil using a field focusing element; focusing the magnetic field onto a second power exchanging coil by the field focusing element, the field focusing element having a resonance frequency that is the same as a resonance frequency of the first power exchanging coil; coupling a compensation coil to the power exchanging coil such that the power exchanging coil is positioned between the field focusing element and the compensation coil; and compensating a change in phase and matching impedance using the compensation coil for enhancing power exchanging capability of the second power exchanging coil, wherein the compensation coil comprises a resonant frequency different from the resonance frequency of the field focusing element.
-
Specification