Wireless Power Transmission System, Power Transmitting Device and Power Receiving Device
First Claim
1. A wireless power transmission system that wirelessly transmits alternating current power from a power transmitting device to a power receiving device, the wireless power transmission system comprising:
- the power transmitting device including;
first and second electrodes spaced apart by a predetermined distance, the first and second electrodes having a total width, including the predetermined distance, of less than or equal to λ
/2π
, which is a near field range;
first and second connection lines that electrically connect the first and second electrodes and two output terminals of an alternating current power generating section, respectively; and
at least one first inductor that is interposed between the first and second electrodes and at least one of the two output terminals of the alternating current power generating section,the power receiving device including;
third and fourth electrodes spaced apart by a predetermined distance, the third and fourth electrodes having a total width, including the predetermined distance, of less than or equal to λ
/2π
, which is a near field range;
third and fourth connection lines that electrically connect the third and fourth electrodes and two input terminals of a load, respectively; and
at least one second inductor that is interposed between the third and fourth electrodes and at least one of the two input terminals of the load,a coupler including the first and second electrodes and the at least one first inductor forms one resonant circuit and a coupler including the third and fourth electrodes and the at least one second inductor forms another resonant circuit,a resonance frequency of the coupler including the first and second electrodes and the at least one first inductor and a resonance frequency of the coupler including the third and fourth electrodes and the at least one second inductor being configured to be substantially equal, the first and second electrodes and the third and fourth electrodes being spaced apart by a distance of less than or equal to λ
/2π
, which is a near field range.
1 Assignment
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Accused Products
Abstract
A wireless power transmission system that transmits alternating-current power includes a power-transmitting device including first and second electrodes spaced apart and having a total width of λ/2π or less, i.e., a near field range, and a first inductor between the first and second electrodes and a AC power-generating section, and a power-receiving device including third and fourth electrodes spaced apart and having a total width of λ/2π or less, and a second inductor between the third and fourth electrodes and a load. A coupler including the first and second electrodes and the first inductor forms one resonant circuit and a coupler including the third and fourth electrodes and the second inductor forms another resonant circuit. Resonance frequencies of the couplers are substantially equal. The first and second electrodes and the third and fourth electrodes are spaced apart by λ/2π or less.
19 Citations
14 Claims
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1. A wireless power transmission system that wirelessly transmits alternating current power from a power transmitting device to a power receiving device, the wireless power transmission system comprising:
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the power transmitting device including; first and second electrodes spaced apart by a predetermined distance, the first and second electrodes having a total width, including the predetermined distance, of less than or equal to λ
/2π
, which is a near field range;first and second connection lines that electrically connect the first and second electrodes and two output terminals of an alternating current power generating section, respectively; and at least one first inductor that is interposed between the first and second electrodes and at least one of the two output terminals of the alternating current power generating section, the power receiving device including; third and fourth electrodes spaced apart by a predetermined distance, the third and fourth electrodes having a total width, including the predetermined distance, of less than or equal to λ
/2π
, which is a near field range;third and fourth connection lines that electrically connect the third and fourth electrodes and two input terminals of a load, respectively; and at least one second inductor that is interposed between the third and fourth electrodes and at least one of the two input terminals of the load, a coupler including the first and second electrodes and the at least one first inductor forms one resonant circuit and a coupler including the third and fourth electrodes and the at least one second inductor forms another resonant circuit, a resonance frequency of the coupler including the first and second electrodes and the at least one first inductor and a resonance frequency of the coupler including the third and fourth electrodes and the at least one second inductor being configured to be substantially equal, the first and second electrodes and the third and fourth electrodes being spaced apart by a distance of less than or equal to λ
/2π
, which is a near field range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12)
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8. A wireless power transmission system that wirelessly transmits alternating current power from a power transmitting device to a power receiving device, the wireless power transmission system comprising:
-
the power transmitting device including; first and second electrodes spaced apart by a predetermined distance, the first and second electrodes having a total width, including the predetermined distance, of less than or equal to λ
/2π
, which is a near field range;first and second connection lines that electrically connect the first and second electrodes and two output terminals of an alternating current power generating section, respectively; and at least one first inductor that is interposed between the first and second electrodes and at least one of the two output terminals of the alternating current power generating section, the power receiving device including; third and fourth electrodes spaced apart by a predetermined distance, the third and fourth electrodes having a total width, including the predetermined distance, of less than or equal to λ
/2π
, which is a near field range;third and fourth connection lines that electrically connect the third and fourth electrodes and two input terminals of a load, respectively; and at least one second inductor that is interposed between the third and fourth electrodes and at least one of the two input terminals of the load, a coupler including the first and second electrodes and the at least one first inductor forms one resonant circuit and a coupler including the third and fourth electrodes and the at least one second inductor forms another resonant circuit, a resonance frequency of the coupler including the first and second electrodes and the at least one first inductor and a resonance frequency of the coupler including the third and fourth electrodes and the at least one second inductor being configured to be substantially equal, the first and second electrodes and the third and fourth electrodes being spaced apart by a distance of less than or equal to λ
/2π
, which is a near field range,the first and second electrodes having a curved shape and oppose each other to form a first tubular structure, an outer periphery of the first tubular structure having a length of less than or equal to λ
/2π
, which is a near field range;the third and fourth electrodes having a curved shape and oppose each other to form a second tubular structure, an outer periphery of the second tubular structure having a length of less than or equal to λ
/2π
, which is a near field;
range andthe first and second tubular structures being disposed substantially concentrically in such a manner that a slit separating the first and second electrodes and a slit separating the third and fourth electrodes oppose each other.
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13. A power transmitting device in a wireless power transmission system that wirelessly transmits alternating current power from a power transmitting device to a power receiving device, comprising:
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first and second electrodes spaced apart by a predetermined distance, the first and second electrodes having a total width, including the predetermined distance, of less than or equal to λ
/2π
, which is a near field range;first and second connection lines that electrically connect the first and second electrodes and two output terminals of an alternating current power generating section, respectively; and at least one first inductor that is interposed between the first and second electrodes and at least one of the two output terminals of the alternating current power generating section, a coupler including the first and second electrodes and the at least one first inductor forms one resonant circuit and a coupler including third and fourth electrodes of the power receiving device and the at least one second inductor forms another resonant circuit, a resonance frequency of the coupler including the first and second electrodes and the at least one first inductor is configured to be substantially equal to a resonance frequency of the coupler including the third and fourth electrodes and the at least one second inductor of the power receiving device, the first and second electrodes and the third and fourth electrodes being spaced apart by a distance of less than or equal to λ
/2π
, which is a near field range.
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14. A power receiving device in a wireless power transmission system that wirelessly transmits alternating current power from a power transmitting device to a power receiving device, comprising:
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third and fourth electrodes spaced apart by a predetermined distance, the third and fourth electrodes having a total width, including the predetermined distance, of less than or equal to λ
/2π
, which is a near field range;third and fourth connection lines that electrically connect the third and fourth electrodes and two input terminals of a load, respectively; and at least one second inductor that is interposed between the third and fourth electrodes and at least one of the two input terminals of the load, a coupler including first and second electrodes of the power transmitting device and the at least one first inductor forms one resonant circuit and a coupler including the third and fourth electrodes and the at least one second inductor forms another resonant circuit, a resonance frequency of the coupler including the third and fourth electrodes and the at least one second inductor is configured to be substantially equal to a resonance frequency of the coupler including the first and second electrodes and the first inductor of the power transmitting device.
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Specification