Electric power transmitting device, non-contact power supply system, and control method
First Claim
1. An electric power transmitting device comprising:
- a resonance circuit including a resonance capacitor and a resonance coil acting as a transmitting antenna;
a plurality of first coils arranged magnetically coupled with the resonance coil,wherein the electric power transmitting device transmits electric power in a non-contact manner with the use of resonant coupling of the resonance circuit, andwherein, when transmitting the electric power, the plurality of first coils are controlled to connect or disconnect both ends thereof so as to bring a resonance frequency of the resonance circuit close to a frequency of an electric power transmission signal outputted as the electric power to be transmitted,wherein each of the first coils is separately controllable in a connection state of connecting or disconnecting the both ends thereof, andwherein each of the first coils has a mutually different length and is arranged concentrically surrounding the resonance coil.
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Accused Products
Abstract
A non-contact power supply system is provided employing an electric power transmitting device which can improve the transmission efficiency of electric power, suppressing the circuit scale. The electric power transmitting device is configured with a resonance circuit including a resonance capacity and a resonance coil acting as a transmitting antenna, and a first coil arranged magnetically coupled with the resonance coil. The electric power transmitting device transmits electric power in a non-contact manner using resonant coupling of the resonance circuit. When transmitting the electric power, the electric power transmitting device controls the first coil to connect or disconnect both ends thereof so as to bring a resonance frequency of the resonance circuit close to a frequency of an electric power transmission signal outputted as the electric power to be transmitted.
26 Citations
15 Claims
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1. An electric power transmitting device comprising:
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a resonance circuit including a resonance capacitor and a resonance coil acting as a transmitting antenna; a plurality of first coils arranged magnetically coupled with the resonance coil, wherein the electric power transmitting device transmits electric power in a non-contact manner with the use of resonant coupling of the resonance circuit, and wherein, when transmitting the electric power, the plurality of first coils are controlled to connect or disconnect both ends thereof so as to bring a resonance frequency of the resonance circuit close to a frequency of an electric power transmission signal outputted as the electric power to be transmitted, wherein each of the first coils is separately controllable in a connection state of connecting or disconnecting the both ends thereof, and wherein each of the first coils has a mutually different length and is arranged concentrically surrounding the resonance coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification