Contactless power feeding apparatus and contactless power feeding system
First Claim
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1. A contactless power feeding apparatus comprising:
- a power source portion capable of changing a feeding voltage value;
a power feeding coil generating a power feeding magnetic field by supply of an AC thereto from the power source portion;
a power feeding apparatus side control portion controlling the feeding voltage value of the power source portion; and
a communication portion communicating with a power receiving apparatus, whereinthe power feeding apparatus side control portion that acquires a coupling coefficient between the power feeding coil and a power receiving coil provided outside, receiving electric power through the power feeding magnetic field of the power feeding coil, and performs feeding voltage control in order to control the feeding voltage value of the power source portion on the basis of the coupling coefficient; and
the power feeding apparatus side control portion performs control of acquiring an inductance of the power receiving coil and a receiving AC voltage value that is a value of an AC voltage of the power receiving coil received through the power feeding magnetic field from the power receiving apparatus through the communication portion and calculating the coupling coefficient on the basis of the inductance and the receiving AC voltage value of the power receiving coil that are acquired, an inductance of the power feeding coil, and the feeding voltage value of the power source portion.
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Abstract
A contactless power feeding apparatus includes a power source portion, a power feeding coil, and a power feeding apparatus side control portion, and the power feeding apparatus side control portion is configured to perform feeding voltage control in order to control the feeding voltage value of the power source portion on the basis of a coupling coefficient such that power transmission efficiency to a power receiving apparatus including a power receiving coil is in the vicinity of a maximum.
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Citations
19 Claims
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1. A contactless power feeding apparatus comprising:
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a power source portion capable of changing a feeding voltage value; a power feeding coil generating a power feeding magnetic field by supply of an AC thereto from the power source portion; a power feeding apparatus side control portion controlling the feeding voltage value of the power source portion; and a communication portion communicating with a power receiving apparatus, wherein the power feeding apparatus side control portion that acquires a coupling coefficient between the power feeding coil and a power receiving coil provided outside, receiving electric power through the power feeding magnetic field of the power feeding coil, and performs feeding voltage control in order to control the feeding voltage value of the power source portion on the basis of the coupling coefficient; and the power feeding apparatus side control portion performs control of acquiring an inductance of the power receiving coil and a receiving AC voltage value that is a value of an AC voltage of the power receiving coil received through the power feeding magnetic field from the power receiving apparatus through the communication portion and calculating the coupling coefficient on the basis of the inductance and the receiving AC voltage value of the power receiving coil that are acquired, an inductance of the power feeding coil, and the feeding voltage value of the power source portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A contactless power feeding apparatus comprising:
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a power source portion capable of changing a feeding voltage value; a power feeding coil generating a power feeding magnetic field by supply of an AC thereto from the power source portion; and a power feeding apparatus side control portion controlling the feeding voltage value of the power source portion, wherein the power feeding apparatus side control portion performs feeding voltage control in order to control the feeding voltage value of the power source portion on the basis of a coupling coefficient between the power feeding coil and a power receiving coil provided outside, receiving electric power through the power feeding magnetic field of the power feeding coil wherein power transmission efficiency to a power receiving apparatus including the power receiving coil is in the vicinity of a maximum, further comprising a communication portion communicating with the power receiving apparatus, wherein the power feeding apparatus side control portion performs control of acquiring an inductance of the power receiving coil and a receiving AC voltage value that is a value of an AC voltage of the power receiving coil received through the power feeding magnetic field from the power receiving apparatus through the communication portion and calculating the coupling coefficient on the basis of the inductance and the receiving AC voltage value of the power receiving coil that are acquired, an inductance of the power feeding coil, and the feeding voltage value of the power source portion. - View Dependent Claims (17, 18)
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19. A contactless power feeding apparatus comprising:
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a power source portion capable of changing a feeding voltage value; a power feeding coil generating a power feeding magnetic field by supply of an AC thereto from the power source portion; and a power feeding apparatus side control portion controlling the feeding voltage value of the power source portion, wherein the power feeding apparatus side control portion performs feeding voltage control in order to control the feeding voltage value of the power source portion on the basis of a coupling coefficient between the power feeding coil and a power receiving coil provided outside, receiving electric power through the power feeding magnetic field of the power feeding coil wherein power transmission efficiency to a power receiving apparatus including the power receiving coil is in the vicinity of a maximum, further comprising a communication portion communicating with the power receiving apparatus, wherein the power feeding apparatus side control portion performs control of acquiring model information about the power receiving apparatus through the communication portion and determining whether or not to start the feeding voltage control on the basis of the model information that is acquired.
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Specification