RELAY DEVICE OF WIRELESS POWER TRANSMISSION SYSTEM
First Claim
Patent Images
1. A relay device employed in a resonance wireless power transmission system, comprising:
- a relay antenna comprising a power relay coil; and
an automatic tuning assist circuit coupled with the relay antenna,wherein the automatic tuning assist circuit comprises;
a first terminal and a second terminal coupled with the relay antenna;
N (N represents an integer) auxiliary capacitors;
a plurality of switches each of which is arranged between two terminals from among the first terminal, the second terminal, and the terminals of the aforementioned N auxiliary capacitors; and
a controller configured to switch on and off the plurality of switches in synchronization with an electric power signal transmitted from a wireless power supply apparatus.
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Abstract
A relay antenna includes a power relay coil. An automatic tuning assist circuit is coupled with the relay antenna. The automatic tuning assist circuit has first and second terminals coupled with the relay antenna. Multiple switches are arranged together with N (N represents an integer) auxiliary capacitors between the first terminal and the second terminal. A controller is configured to switch on and off each of the multiple switches in synchronization with an electric power signal transmitted from a wireless power supply apparatus.
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Citations
33 Claims
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1. A relay device employed in a resonance wireless power transmission system, comprising:
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a relay antenna comprising a power relay coil; and an automatic tuning assist circuit coupled with the relay antenna, wherein the automatic tuning assist circuit comprises; a first terminal and a second terminal coupled with the relay antenna; N (N represents an integer) auxiliary capacitors; a plurality of switches each of which is arranged between two terminals from among the first terminal, the second terminal, and the terminals of the aforementioned N auxiliary capacitors; and a controller configured to switch on and off the plurality of switches in synchronization with an electric power signal transmitted from a wireless power supply apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12)
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10. A relay device employed in a resonance wireless power transmission system, comprising:
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a relay antenna comprising a power relay coil; and an automatic tuning assist circuit coupled with the relay antenna, wherein the automatic tuning assist circuit comprises; N (N represents an integer) auxiliary capacitors; a plurality of switches arranged in order to charge and discharge the N auxiliary capacitors using a current that flows through the relay antenna; and a controller configured to perform switching of the plurality of switches so as to generate capacitor voltages across the N auxiliary capacitors respectively, and to apply, to the relay antenna, a correction voltage that corresponds to the capacitor voltages across the N auxiliary capacitors.
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13. A relay device employed in a resonance wireless power transmission system, comprising:
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a relay antenna comprising a power relay coil; and an automatic tuning assist circuit coupled with the relay antenna, and configured to inject a correction current into the relay antenna or otherwise to draw a correction current from the relay antenna, wherein the automatic tuning assist circuit comprises; a first terminal and a second terminal coupled with the relay antenna; N (N represents an integer) auxiliary coils; and a plurality of switches arranged between two terminals from among the first terminal, the second terminal, and the terminals of the N auxiliary coils; and a controller configured to switch on and off the plurality of switches in synchronization with an electric power signal transmitted from a wireless power supply apparatus. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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22. A relay device employed in a resonance wireless power transmission system, comprising:
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a relay antenna comprising a power relay coil; and an automatic tuning assist circuit coupled with the relay antenna, and configured to inject a correction current into the relay antenna or otherwise to draw a correction current from the relay antenna, wherein the automatic tuning assist circuit comprises an auxiliary coil, and wherein the automatic tuning assist circuit is configured to switch states between (1) a first state in which the auxiliary coil is coupled with the relay antenna so as to inject or otherwise draw, into or otherwise from the relay antenna, a correction current that corresponds to a current that flows through the auxiliary coil, and (2) a second state in which the auxiliary coil is disconnected from the relay antenna such that the current that flows through the auxiliary coil flows through a current path that is independent of the relay antenna. - View Dependent Claims (23)
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Specification