Power transmission device, wireless power supply system, and wireless power supply device
First Claim
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1. A power transmission device comprising:
- a power supply unit configured to supply power by a resonance frequency for magnetic resonance;
a power transmission resonance coil capable of magnetic resonance with a power reception resonance coil in the resonance frequency, the power transmission resonance coil being configured to supply the power from the power supply unit as magnetic field energy caused by the magnetic resonance;
a temperature detector provided in the power transmission resonance coil; and
a control unit configured to refer to a table stored in a memory expressing an allowable temperature range, determine whether a detected temperature detected by the temperature detector at an elapsed time is within the allowable temperature range at the elapsed time, and stop an operation of the power supply unit when the detected temperature is lower than a lowest temperature of the allowable temperature range and when the detected temperature is higher than a highest temperature of the allowable temperature range.
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Abstract
A power transmission device includes a power supply unit configured to supply power by a resonance frequency for magnetic resonance; a power transmission resonance coil capable of magnetic resonance with a power reception resonance coil in the resonance frequency, the power transmission resonance coil being configured to supply the power from the power supply unit as magnetic field energy caused by the magnetic resonance; a temperature detector provided in the power transmission resonance coil; and a control unit configured to refer to a table stored in a memory expressing an allowable temperature range, determine whether a detected temperature detected by the temperature detector at an elapsed time is within the allowable temperature range at the elapsed time, and stop an operation of the power supply unit when the detected temperature is not within the allowable temperature range.
18 Citations
7 Claims
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1. A power transmission device comprising:
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a power supply unit configured to supply power by a resonance frequency for magnetic resonance; a power transmission resonance coil capable of magnetic resonance with a power reception resonance coil in the resonance frequency, the power transmission resonance coil being configured to supply the power from the power supply unit as magnetic field energy caused by the magnetic resonance; a temperature detector provided in the power transmission resonance coil; and a control unit configured to refer to a table stored in a memory expressing an allowable temperature range, determine whether a detected temperature detected by the temperature detector at an elapsed time is within the allowable temperature range at the elapsed time, and stop an operation of the power supply unit when the detected temperature is lower than a lowest temperature of the allowable temperature range and when the detected temperature is higher than a highest temperature of the allowable temperature range. - View Dependent Claims (2, 3, 4, 5)
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6. A wireless power supply system comprising:
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a power supply unit configured to supply power by a resonance frequency for magnetic resonance; a power transmission resonance coil capable of magnetic resonance with a power reception resonance coil in the resonance frequency, the power transmission resonance coil being configured to supply the power from the power supply unit as magnetic field energy caused by the magnetic resonance; a temperature detector provided in the power transmission resonance coil; a control unit configured to determine whether a detected temperature detected by the temperature detector at an elapsed time is within an allowable temperature range at an elapsed time, and stop an operation of the power supply unit when the detected temperature is lower than a lowest temperature of the allowable temperature range and when the detected temperature is higher than a highest temperature of the allowable temperature range; and a power reception resonance coil capable of magnetic resonance with the power transmission resonance coil in the resonance frequency, the power reception resonance coil being configured to receive the magnetic field energy transmitted from the power transmission resonance coil by the magnetic resonance.
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7. A wireless power supply device comprising:
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a power supply unit configured to supply power by a resonance frequency for magnetic resonance; a power transmission resonance coil capable of magnetic resonance with a power reception resonance coil in the resonance frequency, the power transmission resonance coil being configured to supply the power from the power supply unit as magnetic field energy caused by the magnetic resonance; a temperature detector provided in the power transmission resonance coil; and a control unit configured to refer to a table stored in a memory expressing an allowable temperature range, determine whether a detected temperature detected by the temperature detector at an elapsed time is within the allowable temperature range at the elapsed time, and stop an operation of the power supply unit when the detected temperature is lower than a lowest temperature of the allowable temperature range and when the detected temperature is higher than a highest temperature of the allowable temperature range.
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Specification
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Current AssigneeFujitsu Limited
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Original AssigneeFujitsu Limited
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InventorsUchida, Akiyoshi
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Primary Examiner(s)PHAM, TOAN NGOC
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Application NumberUS13/355,727Publication NumberTime in Patent Office988 DaysField of Search340/584, 307/104, 320/108, 320/137, 320/150US Class Current340/584CPC Class CodesH02J 50/12 of the resonant typeH02J 50/60 responsive to the presence ...H02J 7/00309 Overheat or overtemperature...
