POWER TRANSMISSION SYSTEM AND POWER RECEIVING APPARATUS
First Claim
1. A power transmission system comprising:
- a power transmitting apparatus including;
a power-transmitting coupling electrode having an active electrode and a passive electrode, anda voltage generating circuit configured to apply a high-frequency high voltage to the power-transmitting coupling electrode; and
a power receiving apparatus including;
a power-receiving coupling electrode having an active electrode and a passive electrode, anda power receiving circuit coupled to the power-receiving coupling electrode, the power receiving circuit comprising an inductance element and a load circuit connected in parallel to the inductance element,wherein, when the power transmitting apparatus is positioned in proximity to the power receiving apparatus to create an electric field coupling relationship between the respective coupling electrodes, a first resonance circuit that includes an inductance component and a capacitance component of the power receiving circuit is formed in series between the active electrode and the passive electrode of the power-receiving coupling electrode, and a second resonance circuit is formed that includes the capacitance component and the inductance element that is connected in parallel to the capacitance component, andwherein the voltage generating circuit is configured to set a frequency of the high-frequency high voltage to a value between two resonance frequencies generated by a complex resonance of the first resonance circuit and the second resonance circuit.
1 Assignment
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Accused Products
Abstract
A piezoelectric transformer includes capacitance elements, an inductance element, a resistance, and an ideal transformer. A first resonance circuit includes the piezoelectric transformer, the capacitance of a capacitance element of a coupling electrode of a power receiving apparatus, and the capacitance of a capacitance element of a coupling electrode of a power transmitting apparatus. On the other hand, a second resonance circuit includes an equivalent output capacitance of the piezoelectric transformer and an inductance element. The frequency of a high-frequency high voltage that is generated by a high-frequency high-voltage generating circuit is set to a value between two resonance frequencies generated by a complex resonance of the first resonance circuit and the second resonance circuit.
7 Citations
18 Claims
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1. A power transmission system comprising:
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a power transmitting apparatus including; a power-transmitting coupling electrode having an active electrode and a passive electrode, and a voltage generating circuit configured to apply a high-frequency high voltage to the power-transmitting coupling electrode; and a power receiving apparatus including; a power-receiving coupling electrode having an active electrode and a passive electrode, and a power receiving circuit coupled to the power-receiving coupling electrode, the power receiving circuit comprising an inductance element and a load circuit connected in parallel to the inductance element, wherein, when the power transmitting apparatus is positioned in proximity to the power receiving apparatus to create an electric field coupling relationship between the respective coupling electrodes, a first resonance circuit that includes an inductance component and a capacitance component of the power receiving circuit is formed in series between the active electrode and the passive electrode of the power-receiving coupling electrode, and a second resonance circuit is formed that includes the capacitance component and the inductance element that is connected in parallel to the capacitance component, and wherein the voltage generating circuit is configured to set a frequency of the high-frequency high voltage to a value between two resonance frequencies generated by a complex resonance of the first resonance circuit and the second resonance circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power receiving apparatus attachable to a power transmitting apparatus including a power-transmitting coupling electrode having an active electrode and a passive electrode, and a voltage generating circuit that applies a high-frequency high voltage to the power-transmitting coupling electrode, the power receiving apparatus comprising:
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a power-receiving coupling electrode configured to be coupled to the power-transmitting coupling electrode, the power-receiving coupling electrode including an active electrode and a passive electrode; and a power receiving circuit connected to the power-receiving coupling electrode, the power receiving circuit including an inductance element and a load circuit connected in parallel to the inductance element, wherein, when the power receiving apparatus is positioned in proximity to the power transmitting apparatus to create an electric field coupling relationship between the respective coupling electrodes, a first resonance circuit that includes an inductance component and a capacitance component of the power receiving circuit is formed in series between the active electrode and the passive electrode of the power-receiving coupling electrode, and a second resonance circuit is formed that includes the capacitance component and the inductance element connected in parallel to the capacitance component, and wherein the voltage generating circuit is configured to set a frequency of the high-frequency high voltage to a value between two resonance frequencies generated by a complex resonance of the first resonance circuit and the second resonance circuit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification