CONTACTLESS POWER SUPPLY SYSTEM
1 Assignment
0 Petitions
Accused Products
Abstract
In a contactless power supply system 10 having a secondary coil 13 receiving electric power generated from a primary coil 12 to be connected to a high-frequency power source 11, and a resonance coil 14 arranged in direct contact with the secondary coil 13 in between the primary coil 12 and the secondary coil 13, respective planarly-viewed areas of the secondary and the resonance coils 13, 14 are equal to or smaller than a planarly-viewed area of the primary coil 12, the primary coil 12 is formed by planarly and spirally winding a first litz wire 25, the resonance coil 14 is formed by tandemly winding coils 27, 28 in a double layer, the coils 27, 28 being formed by planarly and spirally winding a second litz wire 26, and the secondary coil 13 is formed by parallelly arranging and planarly and spirally winding third litz wires 29, 29a.
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Citations
16 Claims
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1-8. -8. (canceled)
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9. A contactless power supply system, comprising:
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a primary coil to be connected to a high-frequency power source; a secondary coil to receive electric power generated from the primary coil; a resonance coil arranged in direct contact with the secondary coil in between the primary coil and the secondary coil; and a rectifier circuit to convert output generated in the secondary coil to direct current, wherein the primary coil, the resonance coil and the secondary coil are formed by planarly and spirally winding a first litz wire, a second litz wire and third litz wires, respectively, a capacitor and a resistance are tandemly connected to the resonance coil, a switching element circuit is parallelly connected to the resistance, by detecting output current and output voltage of the rectifier circuit by a controlling circuit, feedback control that changes a duty ratio of ons and offs of the switching element circuit is performed, and each of the output current and the output voltage of the rectifier circuit is controlled to be at a constant value or less. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification