Power supply device, power receiving device, and charging system
First Claim
1. A power supply apparatus configured to be disposed on a ground side and configured to supply power using an electromagnetic force to a power receiving apparatus configured to be disposed on a vehicle, the power supply apparatus comprising:
- a coil,wherein the power supply apparatus provides power to the coil with frequencies to detect a peak of efficiency of power supply performed from the coil to the power receiving apparatus, the frequencies sweeping between a first frequency and a second frequency which is higher than the first frequency,after the power supply apparatus detects the peak of the efficiency of the power supply, the power supply apparatus provides power to the coil with a third frequency corresponding to the peak of the efficiency of the power supply, andwherein the second frequency corresponds to a single local minimum value of the efficiency of the power supply, located between two peaks of the efficiency of the power supply.
2 Assignments
0 Petitions
Accused Products
Abstract
Power supply device is provided with the following: a power supply unit (121) that includes a spiral coil or a solenoid coil; a frequency characteristic acquisition unit (211) that acquires the frequency characteristics of the efficiency of the supply of power from the power supply unit to the power receiving device; a peak determining unit (212) that determines peaks in the frequency characteristics of the efficiency of power supply; and a drive frequency determination unit (213) that, if two peaks have been found, determines as the drive frequency used for supplying power a frequency near the frequency that is the lower of the frequencies of the two peaks, with the lower frequency being given priority over a frequency near the higher frequency.
11 Citations
14 Claims
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1. A power supply apparatus configured to be disposed on a ground side and configured to supply power using an electromagnetic force to a power receiving apparatus configured to be disposed on a vehicle, the power supply apparatus comprising:
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a coil, wherein the power supply apparatus provides power to the coil with frequencies to detect a peak of efficiency of power supply performed from the coil to the power receiving apparatus, the frequencies sweeping between a first frequency and a second frequency which is higher than the first frequency, after the power supply apparatus detects the peak of the efficiency of the power supply, the power supply apparatus provides power to the coil with a third frequency corresponding to the peak of the efficiency of the power supply, and wherein the second frequency corresponds to a single local minimum value of the efficiency of the power supply, located between two peaks of the efficiency of the power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A charging system comprising:
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a power supply apparatus to be disposed on a ground side; and a power receiving apparatus that is to be disposed on a vehicle and that receives power supplied from the power supply apparatus using an electromagnetic force, wherein the power receiving apparatus includes; a power receiving section including a spiral coil or solenoid coil that receives the power supplied from the power supply apparatus; and a storage battery that stores the power received by the power receiving section, and the power supply apparatus includes; a coil, wherein the power supply apparatus provides power to the coil with frequencies to detect a peak of efficiency of power supply performed from the coil to the power receiving apparatus, the frequencies sweeping between a first frequency and a second frequency which is higher than the first frequency, after the power supply apparatus detects the peak of the efficiency of the power supply, the power supply apparatus provides power to the coil with a third frequency corresponding to the peak of the efficiency of the power supply, and wherein the second frequency corresponds to a single local minimum value of the efficiency of the power supply, located between two peaks of the efficiency of the power supply.
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Specification