ENERGY TRANSMISSION APPARATUS AND METHOD
First Claim
1. A wireless power transmitting apparatus comprising:
- a power supply configured to generate AC power;
a transmitting coil configured to transmit wireless power to a wireless power receiving apparatus, based on the AC power; and
a measuring unit configured to sense an input impedance of the transmitting coil,wherein the input impedance includes a real component and an imaginary component,wherein the wireless power transmitting apparatus controls the imaginary component of the input impedance to maintain a certain range.
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Accused Products
Abstract
An apparatus and method for wirelessly transmitting electromagnetic energy are provided. The apparatus includes a power source, a transmission unit, and a measurement unit. The power source supplies a power according to a certain frequency. The transmission unit receives the power to wirelessly transmit the received power through self resonance. The measurement unit measures a phase difference between a voltage and current of the transmission unit. The certain frequency is controlled according to the phase difference. Accordingly, the apparatus and method control only the frequency of the power supply when a resonance frequency is changed by the change of an ambient environment, thus enhancing energy transmission efficiency.
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Citations
14 Claims
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1. A wireless power transmitting apparatus comprising:
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a power supply configured to generate AC power; a transmitting coil configured to transmit wireless power to a wireless power receiving apparatus, based on the AC power; and a measuring unit configured to sense an input impedance of the transmitting coil, wherein the input impedance includes a real component and an imaginary component, wherein the wireless power transmitting apparatus controls the imaginary component of the input impedance to maintain a certain range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless power transmitting method comprising:
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generating AC power; transmitting wireless power to a wireless power receiving apparatus through a transmitting coil, based on the AC power; and sensing an input impedance of the transmitting coil, wherein the input impedance includes a real component and an imaginary component, wherein the wireless power transmitting method comprises controlling the imaginary component of the input impedance to maintain a certain range. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification