Method and apparatus for wireless power transmission with harmonic noise cancellation
First Claim
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1. A wireless power transmission apparatus comprising:
- a source resonator configured to transmit an output power to a wireless power reception apparatus by resonating with a target resonator of the wireless power reception apparatus, wherein the transmitted output power has a predetermined frequency band; and
a resonant power generator comprising first and second notch filters coupled to a low-pass filter (LPF),wherein the first and second notch filters are configured to cancel a third harmonic component of the output power, and the LPF is configured to cancel a fifth or higher odd-order harmonic component of the output power,wherein the resonant power generator is configured to differentially input a first input signal and a second input signal to the source resonator, and cancel an even-order harmonic component of the output power, andwherein the source resonator is further configured to transmit the output power from which the third harmonic component and the fifth or higher odd-order harmonic component have been cancelled to the wireless power reception apparatus.
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Abstract
A wireless power transmission apparatus includes a source resonator configured to transmit an output power from which a harmonic component has been cancelled to a wireless power reception apparatus by resonating with a target resonator of the wireless power transmission apparatus, and a resonant power generator configured to differentially input a first input signal and a second input signal to the source resonator, and cancel the harmonic component of the output power.
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Citations
19 Claims
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1. A wireless power transmission apparatus comprising:
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a source resonator configured to transmit an output power to a wireless power reception apparatus by resonating with a target resonator of the wireless power reception apparatus, wherein the transmitted output power has a predetermined frequency band; and a resonant power generator comprising first and second notch filters coupled to a low-pass filter (LPF), wherein the first and second notch filters are configured to cancel a third harmonic component of the output power, and the LPF is configured to cancel a fifth or higher odd-order harmonic component of the output power, wherein the resonant power generator is configured to differentially input a first input signal and a second input signal to the source resonator, and cancel an even-order harmonic component of the output power, and wherein the source resonator is further configured to transmit the output power from which the third harmonic component and the fifth or higher odd-order harmonic component have been cancelled to the wireless power reception apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless power transmission apparatus comprising:
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a source resonator configured to transmit an output power to a wireless power reception apparatus by resonating with a target resonator of the wireless power reception apparatus; a resonant power generator comprising; a first power amplifier comprising a first notch filter and configured to generate a first input signal; and a second power amplifier comprising a second notch filter and configured to generate a second input signal; wherein the resonant power generator is configured to cancel an even-order harmonic component of the output power by differentially inputting the first input signal and the second input signal to the source resonator, and cancel a third harmonic component of the output power using the first notch filter and the second notch filter; and a low-pass filter (LPF) coupled to the first and second notch filters and configured to cancel a fifth or higher odd-order harmonic component of the output power; wherein the source resonator is further configured to transmit, to the wireless power reception apparatus, the output power from which the even-order harmonic component, the third harmonic component, and the fifth or higher odd-order harmonic component have been cancelled.
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13. A wireless power transmission method in a wireless power transmission apparatus, the method comprising:
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generating, via a resonant power generator, a first input signal and a second input signal; differentially inputting, via the resonant power generator, the first input signal and the second input signal to a source resonator and cancelling an even-order harmonic component of the output power; cancelling, via a low-pass filter (LPF) and first and second notch filters coupled to the LPF, a harmonic component comprising a third harmonic component and a fifth or higher odd-order harmonic component of an output power of the source resonator; and transmitting, via the source resonator, the output power from which the harmonic component including the third harmonic component and the fifth or higher odd-order harmonic component has been cancelled to a wireless power reception apparatus by resonating with a target resonator of the wireless power reception apparatus. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification