POWER TRANSMISSION DEVICE AND WIRELESS POWER TRANSMISSION SYSTEM USING THE POWER TRANSMISSION DEVICE
First Claim
1. A power transmission device that wirelessly transmits alternating current power to a power receiving device, the power transmission device comprising:
- a power conversion circuit that outputs an alternating voltage in order to generate an alternating magnetic field; and
a control circuit used to control a frequency of the alternating voltage, whereinthe control circuit sets, in a predetermined frequency range, the frequency of the alternating voltage to a higher one of a first frequency at which transmission efficiency is highest and a second frequency at which a voltage generated in the power receiving device is highest, and performs power transmission.
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Accused Products
Abstract
A power transmission device includes a power conversion circuit that outputs an alternating voltage in order to generate an alternating magnetic field and a control circuit used to control a frequency of the alternating voltage. The control circuit sets, in a predetermined frequency range, the frequency of the alternating voltage to a higher one of a first frequency at which transmission efficiency is highest and a second frequency at which a voltage generated in the power receiving device is highest, and performs power transmission.
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Citations
6 Claims
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1. A power transmission device that wirelessly transmits alternating current power to a power receiving device, the power transmission device comprising:
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a power conversion circuit that outputs an alternating voltage in order to generate an alternating magnetic field; and a control circuit used to control a frequency of the alternating voltage, wherein the control circuit sets, in a predetermined frequency range, the frequency of the alternating voltage to a higher one of a first frequency at which transmission efficiency is highest and a second frequency at which a voltage generated in the power receiving device is highest, and performs power transmission. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification