Non-contact electric power supplying equipment, non-contact electric power receiving device, and non-contact electric power supplying system
First Claim
1. Non-contact electric power supplying equipment comprising:
- an electric power transferring resonator for transferring electric power to an electric power receiving device in a non-contact manner by resonating with an electric power receiving resonator of said electric power receiving device through an electromagnetic field;
a power supply device connected to said electric power transferring resonator and generating predetermined high frequency voltage; and
a control device for controlling said power supply device to control supplying or not supplying electric power from said electric power transferring resonator to said electric power receiving resonator, said control device controlling supplying electric power based on a characteristic in frequency of an impedance varying with a distance between said electric power transferring resonator and said electric power receiving resonator.
1 Assignment
0 Petitions
Accused Products
Abstract
Electric power supplying equipment and an electric power receiving device include a primary self resonant coil and a secondary self resonant coil, respectively, resonating through an electromagnetic field to allow the electric power supplying equipment to supply the electric power receiving device with electric power in a non-contact manner. A control device controls a high frequency electric power supply device to control supplying electric power from the primary self resonant coil to the secondary self resonant coil. The control device estimates a distance between the primary self resonant coil and the secondary self resonant coil from an S-parameter S11 varying with the distance between the primary self resonant coil and the secondary self resonant coil, and controls supplying electric power, based on that estimated distance.
67 Citations
20 Claims
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1. Non-contact electric power supplying equipment comprising:
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an electric power transferring resonator for transferring electric power to an electric power receiving device in a non-contact manner by resonating with an electric power receiving resonator of said electric power receiving device through an electromagnetic field; a power supply device connected to said electric power transferring resonator and generating predetermined high frequency voltage; and a control device for controlling said power supply device to control supplying or not supplying electric power from said electric power transferring resonator to said electric power receiving resonator, said control device controlling supplying electric power based on a characteristic in frequency of an impedance varying with a distance between said electric power transferring resonator and said electric power receiving resonator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 18, 19)
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9. A non-contact electric power receiving device comprising:
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an electric power receiving resonator for receiving electric power from electric power supplying equipment in a non-contact manner by resonating with an electric power transferring resonator of said electric power supplying equipment through an electromagnetic field; and an impedance variation device for varying an impedance, depending on whether receiving electric power from said electric power supplying equipment is necessary, so that whether receiving electric power from said electric power supplying equipment is necessary can be determined at said electric power supplying equipment from a characteristic in frequency of the impedance and if it is determined that it is not necessary to receive electric power from said electric power supplying equipment, the electric power supplying equipment will not supply electric power. - View Dependent Claims (10, 11, 12)
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13. A non-contact electric power supplying system comprising:
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electric power supplying equipment capable of outputting predetermined high frequency electric power; and an electric power receiving device capable of receiving electric power from said electric power supplying equipment in a non-contact manner, wherein said electric power supplying equipment including; a power supply device for generating predetermined high frequency voltage; an electric power transferring resonator connected to said power supply device, and receiving electric power from said power supply device and generating an electromagnetic field; and a control device for controlling said power supply device to control supplying or not supplying electric power from said electric power transferring resonator to said electric power receiving device, said electric power receiving device including; an electric power receiving resonator for receiving electric power from said electric power transferring resonator in a non-contact manner by resonating with said electric power transferring resonator through said electromagnetic field, said control device controlling supplying electric power, based on a characteristic in frequency of an impedance varying with a distance between said electric power transferring resonator and said electric power receiving resonator. - View Dependent Claims (14, 15, 16, 17, 20)
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Specification