Wireless power transfer apparatus using enclosures with enhanced magnetic features and methods of fabricating the same
First Claim
Patent Images
1. An apparatus comprising:
- an enclosure configured to be installed in an equipment rack and comprising a wall;
a coil assembly in the enclosure and comprising a magnetic core and a coil disposed on the magnetic core, the magnetic core positioned adjacent the wall such that a main flux path in the magnetic core is through at least one portion of the wall having a magnetic permeability greater than air, wherein the at least one portion of the wall comprises a region with a first magnetic permeability embedded in another component of the wall having a second magnetic permeability, and wherein the magnetic core is positioned adjacent the region such that the main flux path is directed through the region; and
a wireless power receiver circuit in the enclosure, coupled to the coil and configured to be connected to at least one power bus in the equipment rack.
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Abstract
An apparatus includes an enclosure and a coil assembly in the enclosure. The coil assembly includes a magnetic core and a coil disposed on the magnetic core. The magnetic core is positioned adjacent a wall of the enclosure such that a direction of a main flux path in the magnetic core is through at least one portion of the wall having a magnetic permeability greater than air. Such an arrangement may be used for a wireless power receiver unit configured to be installed in an equipment rack in data center applications.
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Citations
22 Claims
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1. An apparatus comprising:
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an enclosure configured to be installed in an equipment rack and comprising a wall; a coil assembly in the enclosure and comprising a magnetic core and a coil disposed on the magnetic core, the magnetic core positioned adjacent the wall such that a main flux path in the magnetic core is through at least one portion of the wall having a magnetic permeability greater than air, wherein the at least one portion of the wall comprises a region with a first magnetic permeability embedded in another component of the wall having a second magnetic permeability, and wherein the magnetic core is positioned adjacent the region such that the main flux path is directed through the region; and a wireless power receiver circuit in the enclosure, coupled to the coil and configured to be connected to at least one power bus in the equipment rack. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system comprising:
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a wireless power transmitter device comprising a first enclosure, a first coil assembly in the first enclosure and comprising a first magnetic core and a first coil disposed on the first magnetic core, the first magnetic core positioned adjacent a wall of the first enclosure; a wireless power receiver device comprising a second enclosure, a second coil assembly in the second enclosure and comprising a second magnetic core and a second coil disposed on the second magnetic core, the second magnetic core positioned adjacent a wall of the second enclosure, wherein the wireless power transmitter device and the wireless power receiver device are disposed adjacent one another such that walls of the first and second enclosures are opposed and the first and second magnetic cores are aligned, and wherein respective first and second opposing portions of the walls of the first and second enclosures between the first and second magnetic cores have a magnetic permeability greater than air; and a magnetically permeable material deposited between the first and second portions of the first and second walls. - View Dependent Claims (10, 11, 12, 13)
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14. A system comprising:
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an equipment rack having at least one bus therein configured to provide power to at least one device installed in the equipment rack; and a wireless power receiver unit comprising an enclosure installed in the equipment rack, a converter circuit in the enclosure and having an output coupled to the at least one bus, and a coil assembly in the enclosure and comprising a magnetic core and a coil disposed on the magnetic core and coupled to an input of the converter circuit, the magnetic core positioned adjacent a wall of the enclosure such that a direction of a main flux path in the magnetic core is through at least one portion of the wall having a magnetic permeability greater than air, wherein the at least one portion of the wall comprises a plastic material having a magnetic material in the wall therein. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method comprising:
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providing an enclosure having a coil assembly therein, the coil assembly comprising a magnetic core and a coil disposed on the magnetic core, the magnetic core positioned adjacent a wall of the enclosure such that a direction of a main flux path in the magnetic core is through at least one portion of the wall; and creating a material region in the at least one portion of the wall having a relative magnetic permeability greater than air by depositing a flowable magnetically permeable material in a recess in the wall. - View Dependent Claims (21, 22)
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Specification