Power transmitting device, power receiving device, and non-contact charging method
First Claim
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1. A power transmitting device, comprising:
- a power transmitting unit which transmits electric power at a power transmitting frequency using magnetic field resonance or electric field resonance to each of a plurality of equipment devices including a non-contact power receiving unit;
a control unit which obtains change information for making a resonance frequency value of a resonance circuit of the power receiving unit of an equipment device having maximum charging power from among the plurality of equipment devices equal to a value of the power transmitting frequency, and for making a resonance frequency value or a Q value of a resonance circuit of the power receiving unit of each of other equipment devices other than the equipment device having the maximum charging power equal to a value for achieving a power receiving amount that depends on charging power of each of the other equipment devices;
a power supply unit which provides the power transmitting unit with electric power to be transmitted to the plurality of equipment devices; and
a communication unit which transmits to each of the plurality of equipment devices the change information corresponding to each of the plurality of equipment devices.
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Abstract
In a non-contact charging method, variable information with which a resonance frequency of a resonance circuit of an equipment device having maximum charging power as the power transmitting frequency, and a resonance frequency or a Q value of a resonance circuit of a power receiving unit of an equipment device other than the equipment device having the maximum charging power as a resonance frequency or a Q value for charging depending on each charging power, and transmits to each equipment device variable information corresponding to each equipment device.
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Citations
22 Claims
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1. A power transmitting device, comprising:
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a power transmitting unit which transmits electric power at a power transmitting frequency using magnetic field resonance or electric field resonance to each of a plurality of equipment devices including a non-contact power receiving unit; a control unit which obtains change information for making a resonance frequency value of a resonance circuit of the power receiving unit of an equipment device having maximum charging power from among the plurality of equipment devices equal to a value of the power transmitting frequency, and for making a resonance frequency value or a Q value of a resonance circuit of the power receiving unit of each of other equipment devices other than the equipment device having the maximum charging power equal to a value for achieving a power receiving amount that depends on charging power of each of the other equipment devices; a power supply unit which provides the power transmitting unit with electric power to be transmitted to the plurality of equipment devices; and a communication unit which transmits to each of the plurality of equipment devices the change information corresponding to each of the plurality of equipment devices. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power receiving device of an equipment device, the power receiving device comprising:
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a power receiving unit which includes a resonance circuit and which receives electric power from a power transmitting device which includes a non-contact power transmitting unit and which transmits electric power at a power transmitting frequency using magnetic field resonance or electric field resonance to each of a plurality of equipment devices; and a control unit which generates charging information which includes identification information for identification of the equipment device which includes the power receiving device and charging power information indicating charging power associated with the equipment device which includes the power receiving device, the charging information being information to be transmitted from the equipment device which includes the power receiving device to the power transmitting device, receives from the power transmitting device change information related to a resonance frequency value or a Q value of the resonance circuit of the power receiving unit, and controls a resonance frequency value or a Q value of the resonance circuit of the power receiving unit according to the change information, wherein when the equipment device which includes the power receiving device has maximum charging power from among the plurality of equipment devices, the change information makes the resonance frequency value of the resonance circuit of the power receiving unit equal to a value of the power transmitting frequency;
otherwise, the change information makes the resonance frequency value or the Q value of the resonance circuit of the power receiving unit equal to a value for achieving a power receiving amount that depends on charging power of the equipment device which includes the power receiving device. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. An external device, comprising:
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a communication unit which communicates with each of a plurality of equipment devices including a non-contact power receiving unit, and which also communicates with a power transmitting device provided with a power transmitting unit which transmits electric power at a power transmitting frequency using magnetic field resonance or electric field resonance to each of the plurality of equipment devices; and a control unit which obtains change information for making a resonance frequency value of a resonance circuit of the power receiving unit of an equipment device having maximum charging power from among the plurality of equipment devices equal to a value of the power transmitting frequency, and for making a resonance frequency value or a Q value of a resonance circuit of the power receiving unit of each of other equipment devices other than the equipment device having the maximum charging power equal to a value for achieving a power receiving amount that depends on charging power of each of the other equipment devices, causes the communication unit to transmit to each of the plurality of equipment devices the change information corresponding to each of the plurality of equipment devices, and causes the communication unit to transmit to the power transmitting device charging power information indicating charging power related to each of the plurality of equipment devices and efficiency information indicating power charging efficiency between the power transmitting device and each of the plurality of equipment devices, or to transmit to the power transmitting device information indicating electric power which is to be transmitted by the power transmitting unit and obtained using the charging power information and the efficiency information. - View Dependent Claims (17, 18, 19)
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20. A non-contact charging method for charging each of a plurality of equipment devices each including a power receiving device provided with a power receiving unit by transmitting electric power from a power transmitting device including a non-contact power transmitting unit to each of the plurality of equipment devices at a power transmitting frequency using magnetic field resonance or electric field resonance, wherein:
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each of the plurality of equipment devices transmits to the power transmitting device charging information that includes identification information for identification of each of the plurality of equipment devices and charging power information indicating charging power related to each of the plurality of equipment devices, the power transmitting device receives the charging information from each of the plurality of equipment devices, obtains change information for making a resonance frequency value of a resonance circuit of the power receiving unit of the power receiving device of an equipment device having maximum charging power from among the plurality of equipment devices equal to a value of the power transmitting frequency, and for making a resonance frequency value or a Q value of a resonance circuit of the power receiving unit of the power receiving device of each of other equipment devices other than the equipment device having the maximum charging power equal to a value for achieving a power receiving amount that depends on charging power of each of the other equipment devices, and obtains transmitting power to be transmitted by the power transmitting unit using the charging power information related to each of the plurality of the equipment devices and efficiency information indicating charging power efficiency between the power transmitting device and each of the plurality of equipment devices; and each of the plurality of equipment devices receives from the power transmitting device the change information related to a resonance frequency value or a Q value of a resonance circuit of the power receiving unit of each of the plurality of equipment devices, and controls the resonance frequency value or the Q value of the resonance circuit of the power receiving unit according to the received change information.
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21. A non-contact charging method for charging each of a plurality of equipment devices each including a power receiving device provided with a power receiving unit by transmitting electric power to each of the plurality of equipment devices from a power transmitting device including a non-contact power transmitting unit to each of the plurality of equipment devices at a power transmitting frequency using magnetic field resonance or electric field resonance, wherein:
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a first equipment device of the plurality of equipment devices acquires from each of the plurality of equipment devices charging information that includes identification information for identification of each of the plurality of equipment devices and charging power information indicating charging power related to each of the plurality of equipment devices, obtains change information for making a resonance frequency value of a resonance circuit of the power receiving unit of the power receiving device of an equipment device having maximum charging power from among the plurality of equipment devices equal to a value of the power transmitting frequency and for making a resonance frequency value or a Q value of a resonance circuit of the power receiving unit of the power receiving device of each of other equipment devices other than the equipment device having the maximum charging power equal to a value for achieving a power receiving amount that depends on charging power of each of the other equipment devices, causes the communication unit to transmit to each of the plurality of equipment devices the obtained change information corresponding to each of the plurality of equipment devices the second equipment device, and causes the communication unit to transmit to the power transmitting device charging power information related to each of the plurality of equipment devices and efficiency information indicating power charging efficiency between the power transmitting device and each of the plurality of equipment devices, or to transmit to the power transmitting device information indicating electric power which is to be transmitted by the power transmitting unit and obtained using the charging power information and the efficiency information; a second equipment device of the plurality of equipment devices that is different from the first equipment device receives from the first equipment device the change information related to a resonance frequency value or a Q value of a resonance circuit of the power receiving unit of the power receiving device of the second equipment device; and each of the first and second equipment devices controls a resonance frequency value or a Q value of the resonance circuit of the power receiving unit of the power receiving device of each of the first and second equipment devices according to the change information related to each of the first and second equipment devices.
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22. A non-contact charging method for charging each of a plurality of equipment devices each including a power receiving device provided with a power receiving unit by transmitting electric power from a power transmitting device including a non-contact power transmitting unit to each of the plurality of equipment devices at a power transmitting frequency using magnetic field resonance or electric field resonance, wherein:
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each of the plurality of equipment devices transmits to an external device charging information that includes identification information for identification of each of the plurality of equipment devices and charging power information indicating charging power related to each of the plurality of equipment devices; the external device obtains change information for making a resonance frequency value of a resonance circuit of the power receiving unit of the power receiving device of an equipment device having maximum charging power from among the plurality of equipment devices equal to a value of the power transmitting frequency, and for making a resonance frequency value or a Q value of a resonance circuit of the power receiving unit of the power receiving device of each of other equipment devices other than the equipment device having the maximum charging power equal to a value for achieving a power receiving amount that depends on charging power of each of the other equipment devices, causes a communication unit to transmit to each of the plurality of equipment devices the obtained change information corresponding to each of the plurality of equipment devices, and causes the communication unit to transmit to the power transmitting device the charging power information related to each of the plurality of equipment devices and efficiency information indicating power charging efficiency between the power transmitting device and each of the plurality of equipment devices, or to transmit to the power transmitting device information indicating electric power which is to be transmitted by the power transmitting unit and obtained using the charging power information and the efficiency information; and each of the plurality of equipment devices receives from the external device the change information related to a resonance frequency value or a Q value of a resonance circuit of the power receiving unit of the power receiving device of each of the plurality of equipment devices, and controls a resonance frequency value or a Q value of the resonance circuit of the power receiving unit of the power receiving device of each of the plurality of equipment devices according to the received change information.
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Specification