CONTROL DEVICE AND WIRELESS POWER TRANSMITTING APPARATUS
First Claim
1. A control device that estimates power transmission efficiency between a power transmitting unit and a power receiving unit, the power transmitting unit including a first coil and a first capacitor connected to the first coil in parallel or in series, and the power receiving unit including a second coil and a second capacitor connected to the second coil in parallel or in series and receiving electric power from the power transmitting unit through a coupling between the first coil and the second coil, the control device comprising:
- an estimator configured to compare a detected value of a first voltage or a first current at a first location in the power transmitting unit with a detected value of second voltage or second current at a second location in the power receiving unit and estimate the power transmission efficiency from the power transmitting unit to the power receiving unit based on comparative result.
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Accused Products
Abstract
There is provided a control device that estimates power transmission efficiency between a power transmitting unit and a power receiving unit. The power transmitting unit includes a first coil and a first capacitor connected to the first coil in parallel or in series. The power receiving unit includes a second coil and a second capacitor connected to the second coil in parallel or in series and receives electric power from the power transmitting unit through a coupling between the first coil and the second coil. The control device includes an estimator. The estimator compares a detected value of a first voltage or a first current at a first location in the power transmitting unit with a detected value of second voltage or second current at a second location in the power receiving unit and estimates the power transmission efficiency from the power transmitting unit to the power receiving unit.
9 Citations
13 Claims
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1. A control device that estimates power transmission efficiency between a power transmitting unit and a power receiving unit, the power transmitting unit including a first coil and a first capacitor connected to the first coil in parallel or in series, and the power receiving unit including a second coil and a second capacitor connected to the second coil in parallel or in series and receiving electric power from the power transmitting unit through a coupling between the first coil and the second coil, the control device comprising:
an estimator configured to compare a detected value of a first voltage or a first current at a first location in the power transmitting unit with a detected value of second voltage or second current at a second location in the power receiving unit and estimate the power transmission efficiency from the power transmitting unit to the power receiving unit based on comparative result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless power transmitting apparatus comprising:
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a power receiving unit including a coil and a capacitor connected to the coil in parallel or in series, which receives electric power from a power transmitting unit through the coil, and a control device including an estimator that compares a detected value of first voltage or first current at a first location in the power transmitting unit with a detected value of second voltage or second current at a second location in the power receiving unit and estimates power transmission efficiency from the power transmitting unit to the power receiving unit based on comparative result. - View Dependent Claims (11, 12)
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13. A power transmission efficiency estimation method comprising:
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detecting first voltage or first current at a first location in a power transmitting unit that includes a first coil and a first capacitor that is connected to the first coil in parallel or in series; detecting second voltage or second current at a second location in a power receiving unit that includes a second coil and a second capacitor that is connected to the second coil in parallel or in series, and receives electric power from the power transmitting unit through a coupling between the first coil and the second coil; and comparing the first voltage with the second voltage or comparing the first current with the second current and estimating power transmission efficiency from the power transmitting unit to the power receiving unit based on comparative result.
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Specification