NON-CONTACT POWER TRANSMISSION DEVICE DRIVE METHOD AND NON-CONTACT POWER TRANSMISSION DEVICE
First Claim
1. A method for driving a contactless power transmission device including a setting surface, which includes a power supplying area, and a primary side circuit, which is located in the power supplying area and formed by a primary coil and a capacitor, wherein when an electric instrument is set in the power supplying area, the contactless power transmission device excites the primary coil located in the power supplying area and produces electromagnetic induction at a secondary coil of a power receiving device arranged in the electric instrument to supply power to the electric instrument, the method comprising:
- exciting the primary coil selectively using a first resonance frequency, which is in the proximity of a frequency determined by the primary coil and the capacitor located in the primary side circuit, and a second resonance frequency, which is in the proximity of a frequency determined by an inductance component and a capacitance component of the electric instrument when the primary coil is opposed to the secondary coil.
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Accused Products
Abstract
A primary coil (L1) is excited by selectively using: a first resonance frequency (AL) near a frequency determined by the primary coil (L1) and a primary-side capacitor (C), said primary coil (L1) being placed in a power-supply area (AR); and a second resonance frequency (BL) near a frequency determined by a secondary-side inductance component and a secondary-side capacitance component, said components existing when the primary coil (L1) faces a secondary coil (L2).
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Citations
21 Claims
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1. A method for driving a contactless power transmission device including a setting surface, which includes a power supplying area, and a primary side circuit, which is located in the power supplying area and formed by a primary coil and a capacitor, wherein when an electric instrument is set in the power supplying area, the contactless power transmission device excites the primary coil located in the power supplying area and produces electromagnetic induction at a secondary coil of a power receiving device arranged in the electric instrument to supply power to the electric instrument, the method comprising:
exciting the primary coil selectively using a first resonance frequency, which is in the proximity of a frequency determined by the primary coil and the capacitor located in the primary side circuit, and a second resonance frequency, which is in the proximity of a frequency determined by an inductance component and a capacitance component of the electric instrument when the primary coil is opposed to the secondary coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A contactless power transmission device including a setting surface, which includes a power supplying area, and a primary side circuit, which is located in the power supplying area and formed by a primary coil and a capacitor, wherein when an electric instrument is set in the power supplying area, the primary coil located in the power supplying area is excited to produce electromagnetic induction at a secondary coil of a power receiving device arranged in the electric instrument to supply power to the electric instrument, the contactless power transmission device comprising:
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a signal generation circuit that selectively generates a first drive signal and a second drive signal, wherein the first drive signal excites the primary coil at a first resonance frequency, which is in the proximity of a frequency determined by the primary coil and the capacitor located in the primary side circuit, and the second drive signal excites the primary coil at a second resonance frequency, which is in the proximity of a frequency determined by an inductance component and a capacitance component of the electric instrument when the primary coil is opposed to the secondary coil; an excitation circuit that excites the primary coil in accordance with one of the first drive signal and the second drive signal provided from the signal generation circuit; and a control circuit that generates an excitation control signal for switching the first drive signal and the second drive signal generated by the signal generation circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification