Apparatus and methods for wireless power transmitter coil configuration
First Claim
1. An apparatus for wirelessly transmitting power, the apparatus comprising:
- a first coil loop defining a first area, the first coil loop conducting current having a first current value that is proportional to the first area and generating a first magnetic field, wherein the first coil loop includes a first number of turns, the first number of turns being proportional to the first area defined by the first coil loop to achieve the first current value that is proportional to the first area; and
a second coil loop surrounding the first coil loop and defining a second area, the second coil loop conducting current having a second current value that is proportional to the second area and generating a second magnetic field, wherein the second coil loop includes a second number of turns, the second number of turns being proportional to the second area defined by the second coil loop to achieve the second current value that is proportional to the second area, wherein a ratio of the first current value to the first area is equal to a ratio of the second current value to the second area, wherein the second current value is an integer multiple of the first current value, and wherein the second area is an integer multiple of the first area.
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Abstract
Methods and apparatus are disclosed for wirelessly transmitting power. In one aspect, an apparatus for wireless transmitting power is provided. The apparatus comprises a first coil loop defining a first area, the first coil loop conducting current at a first current value for generating a first magnetic field. The apparatus further comprises a second coil loop surrounding the first coil loop and defining a second area, the second coil loop conducting current at a second current value generating a second magnetic field, wherein a ratio of the first current value to the first area is substantially equal to a ratio of the second current value to the second area.
13 Citations
27 Claims
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1. An apparatus for wirelessly transmitting power, the apparatus comprising:
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a first coil loop defining a first area, the first coil loop conducting current having a first current value that is proportional to the first area and generating a first magnetic field, wherein the first coil loop includes a first number of turns, the first number of turns being proportional to the first area defined by the first coil loop to achieve the first current value that is proportional to the first area; and a second coil loop surrounding the first coil loop and defining a second area, the second coil loop conducting current having a second current value that is proportional to the second area and generating a second magnetic field, wherein the second coil loop includes a second number of turns, the second number of turns being proportional to the second area defined by the second coil loop to achieve the second current value that is proportional to the second area, wherein a ratio of the first current value to the first area is equal to a ratio of the second current value to the second area, wherein the second current value is an integer multiple of the first current value, and wherein the second area is an integer multiple of the first area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of transmitting wireless power, comprising:
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generating a first magnetic field via a first coil loop, the first coil loop defining a first area and conducting current at a first current value that is proportional to the first area, wherein the first coil loop includes a first number of turns, the first number of turns being proportional to the first area defined by the first coil loop to achieve the first current value that is proportional to the first area; and generating a second magnetic field via a second coil loop, the second coil loop surrounding the first coil loop and defining a second area, the second coil loop conducting current at a second current value that is proportional to the second area, wherein the second coil loop includes a second number of turns, the second number of turns being proportional to the second area defined by the second coil loop to achieve the second current value that is proportional to the second area, wherein a ratio of the first current value to the first area is equal to a ratio of the second current value to the second area, wherein the second current value is an integer multiple of the first current value and wherein the second area is an integer multiple of the first area. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for wirelessly transmitting power, the apparatus comprising:
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a first means for generating a first magnetic field wound about a point to define a first area, the first means for generating the first magnetic field conducting time-varying electrical current at a first current value that is proportional to the first area, wherein the first means generating the first magnetic field includes a first number of turns, the first number of turns being proportional to the first area to achieve the first current value that is proportional to the first area; and a second means for generating a second magnetic field wound about the point to define a second area, the second means for generating the second magnetic field conducting time-varying electrical current at a second current value that is proportional to the second area, wherein the second means for generating the second magnetic field includes a second number of turns, the second number of turns being proportional to the second area to achieve the second current value that is proportional to the second area, wherein a ratio of the first current value to the first area is equal to a ratio of the second current value to the second area wherein the second current value is an integer multiple of the first current value, and wherein the second area is an integer multiple of the first area. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. An apparatus for wirelessly transmitting power, the apparatus comprising:
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a first coil loop defining a first area, the first coil loop conducting current having a first current value that is proportional to the first area and generating a first magnetic field, wherein the first coil loop includes a first number of turns, the first number of turns being proportional to the first area defined by the first coil loop to achieve the first current value that is proportional to the first area; and a second coil loop separated from the first coil loop and defining a second area, the second coil loop conducting current having a second current value that is proportional to the second area and generating a second magnetic field, wherein the second coil loop includes a second number of turns, the second number of turns being proportional to the second area defined by the second coil loop to achieve the second current value that is proportional to the second area; and at least one driver circuit configured to drive the first coil loop and the second coil loop with a current to achieve the first current value and the second current value, wherein a ratio of the first current value to the first area is equal to a ratio of the second current value to the second area, wherein the second current value is an integer multiple of the first current value, and wherein the second area is an integer multiple of the first area. - View Dependent Claims (27)
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Specification