Wireless power repeater and method thereof
First Claim
1. A wireless power transmission apparatus to wirelessly transmit power to a wireless power receiving apparatus, the wireless power transmission apparatus comprising:
- a transmission part including a transmission coil to receive the power from a power supply to generate a magnetic field, a transmission resonance coil to transmit power received therein from the transmission coil, and a plurality of repeating coils placed in the transmission resonance coil to repeat the power;
a controller for controlling the repeating coils such that one of the repeating coils has a resonance frequency equal to a resonance frequency of the transmission resonance coil; and
a detection part for detecting a variation of current in the transmission part;
wherein the controller determines which one of the repeating coils is in range of communication of the wireless power receiving apparatus according to the variation of the current to transmit the power through one of the repeating coils,wherein the detection part comprises a detection coil for detecting an intensity of the magnetic field generated from the transmission resonance coil and a current detector for detecting the variation of the current by converting the magnetic field detected in the detection coil into the current,wherein the controller presets a critical value for a variation in a quantity of the current used to determine a region of the transmission part in which the wireless power receiving apparatus is positioned,wherein the controller determines which one of the repeating coils is in range of communication of the wireless power receiving apparatus based on the critical value, when the wireless power receiving apparatus is positioned on said one of the repeating coils while overlapping with another of the repeating coils,wherein a quantity of the current of said one of the repeating coils exceeds the critical value, andwherein a quantity of the current of said another of the repeating coils is less than the critical value.
1 Assignment
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Accused Products
Abstract
Disclosed is a wireless power transmission apparatus to wirelessly transmit power to a wireless power receiving apparatus by using resonance. The wireless power transmission apparatus includes a transmission part including a transmission coil to receive the power from a power supply to generate a magnetic field, a transmission resonance coil to transmit power received therein from the transmission coil, and a plurality of repeating coils placed in the transmission resonance coil to repeat the power, a detection part to detect a position of the wireless power receiving apparatus placed on the transmission part, and a controller to determine a repeating coil corresponding to the position of the wireless power receiving apparatus and perform a control operation to transmit power through the repeating coil.
10 Citations
19 Claims
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1. A wireless power transmission apparatus to wirelessly transmit power to a wireless power receiving apparatus, the wireless power transmission apparatus comprising:
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a transmission part including a transmission coil to receive the power from a power supply to generate a magnetic field, a transmission resonance coil to transmit power received therein from the transmission coil, and a plurality of repeating coils placed in the transmission resonance coil to repeat the power; a controller for controlling the repeating coils such that one of the repeating coils has a resonance frequency equal to a resonance frequency of the transmission resonance coil; and a detection part for detecting a variation of current in the transmission part; wherein the controller determines which one of the repeating coils is in range of communication of the wireless power receiving apparatus according to the variation of the current to transmit the power through one of the repeating coils, wherein the detection part comprises a detection coil for detecting an intensity of the magnetic field generated from the transmission resonance coil and a current detector for detecting the variation of the current by converting the magnetic field detected in the detection coil into the current, wherein the controller presets a critical value for a variation in a quantity of the current used to determine a region of the transmission part in which the wireless power receiving apparatus is positioned, wherein the controller determines which one of the repeating coils is in range of communication of the wireless power receiving apparatus based on the critical value, when the wireless power receiving apparatus is positioned on said one of the repeating coils while overlapping with another of the repeating coils, wherein a quantity of the current of said one of the repeating coils exceeds the critical value, and wherein a quantity of the current of said another of the repeating coils is less than the critical value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of wirelessly transmitting power by a wireless power transmission apparatus including a plurality of repeating coils to wirelessly transmit the power to a wireless power receiving apparatus, the method comprising:
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controlling the repeating coils such that one of the repeating coils has a resonance frequency equal to a resonance frequency of the wireless power receiving apparatus; detecting a variation of a current in the wireless power transmission apparatus; determining which one of the repeating coils is in range of communication of the wireless power receiving apparatus according to the variation of the current; presetting a critical value for a variation in a quantity of the current used to determine a region of the transmission part in which the wireless power receiving apparatus is positioned; determining which one of the repeating coils is in range of communication of the wireless power receiving apparatus based on the critical value, when the wireless power receiving apparatus is positioned on said one of the repeating coils while overlapping with another of the repeating coils; and transmitting the power through one of the repeating coils, wherein a quantity of the current of said one of the repeating coils exceeds the critical value, and wherein a quantity of the current of said another of the repeating coils is less than the critical value. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification