WIRELESS POWER TRANSMISSION APPARATUS
First Claim
Patent Images
1. A wireless power transmission apparatus, comprising:
- a drive unit that outputs an alternating current;
a phase shifter that controls a phase of the alternating current;
a first power transmitting coil that generates a magnetic field by a first alternating current made to flow therethrough, the phase of the first alternating current being controlled by the phase shifter;
a second power transmitting coil that has a center axis thereof arranged in a position different from the position of the center axis of the first power transmitting coil and linearly symmetrically to the center axis of the first power transmitting coil and generates the magnetic field by a second alternating current made to flow therethrough, the phase of the second alternating current being controlled by the phase shifter; and
a phase control unit that controls the phase shifter so that a first phase of the first alternating current and a second phase of the second alternating current are in phase or reversed phase.
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Abstract
A wireless power transmission apparatus, comprising: a drive unit that outputs an alternating current; a phase shifter that controls a phase of the alternating current; a first power transmitting coil that generates a magnetic field by a first alternating current made to flow therethrough; a second power transmitting coil that has a center axis thereof arranged in a position different from the position of the center axis of the first power transmitting coil and linearly symmetrically to the center axis of the first power transmitting coil; and a phase control unit that controls the phase shifter.
105 Citations
5 Claims
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1. A wireless power transmission apparatus, comprising:
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a drive unit that outputs an alternating current; a phase shifter that controls a phase of the alternating current; a first power transmitting coil that generates a magnetic field by a first alternating current made to flow therethrough, the phase of the first alternating current being controlled by the phase shifter; a second power transmitting coil that has a center axis thereof arranged in a position different from the position of the center axis of the first power transmitting coil and linearly symmetrically to the center axis of the first power transmitting coil and generates the magnetic field by a second alternating current made to flow therethrough, the phase of the second alternating current being controlled by the phase shifter; and a phase control unit that controls the phase shifter so that a first phase of the first alternating current and a second phase of the second alternating current are in phase or reversed phase. - View Dependent Claims (2, 3, 4)
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5. A wireless power transmission apparatus, comprising:
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a drive unit that outputs an alternating current; an amplitude control unit that controls an amplitude of the alternating current; a phase shifter that controls a phase of the alternating current; a first power transmitting coil that generates a magnetic field by a first alternating current made to flow therethrough, the phase of the first alternating current being controlled by the phase shifter and the amplitude of the first alternating current being controlled by the amplitude control unit; a second power transmitting coil that has a center axis thereof arranged in a position different from the position of the center axis of the first power transmitting coil and generates the magnetic field by a second alternating current made to flow therethrough, the phase of the second alternating current being controlled by the phase shifter and the amplitude of the second alternating current being controlled by the amplitude control unit; and a phase control unit that controls the phase shifter so that a phase difference between a first phase of the first alternating current and a second phase of the second alternating current becomes a first phase difference.
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Specification