Shielded power coupling device
First Claim
1. A shielded power coupling device configured to transfer electric power between a stator and a rotor, comprising:
- an inductive field generating element configured to convert electric power to an inductive coupling field;
an inductive field receiving element configured to convert the inductive coupling field to electric power;
a primary and secondary core separated by a core airgap; and
a shell defined by a plurality of segments, the plurality of segments coupled together to form a substantially circular structure, the shell comprising;
a fringe field mitigation element comprising an electrically conductive wire that is inserted into the shell once the plurality of segments are coupled together, the fringe field mitigation element configured to mitigate magnetic flux generated by at least one of the inductive field generating element or the inductive field receiving element and escaping from at least one of the primary core or the secondary core near the core airgap, anda non-fringe field mitigation element.
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0 Petitions
Accused Products
Abstract
One or more techniques and/or systems described herein provide a shielded power coupling device, such as may be used to transfer electric power from a stator portion of a computed tomography (CT) apparatus to a rotor portion. The shielded power coupling device comprises a rotor portion and a stator portion, separated by an airgap, respectively comprising one or more windings and a core. The shielded power coupling device further comprises a fringe field mitigation element(s) (e.g., an electrically conductive wire) that is configured to carry an induced current that creates a magnetic field that mitigates, or substantially cancels, magnetic flux generated by current in the windings that escapes from the core near the core airgap.
76 Citations
20 Claims
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1. A shielded power coupling device configured to transfer electric power between a stator and a rotor, comprising:
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an inductive field generating element configured to convert electric power to an inductive coupling field; an inductive field receiving element configured to convert the inductive coupling field to electric power; a primary and secondary core separated by a core airgap; and a shell defined by a plurality of segments, the plurality of segments coupled together to form a substantially circular structure, the shell comprising; a fringe field mitigation element comprising an electrically conductive wire that is inserted into the shell once the plurality of segments are coupled together, the fringe field mitigation element configured to mitigate magnetic flux generated by at least one of the inductive field generating element or the inductive field receiving element and escaping from at least one of the primary core or the secondary core near the core airgap, and a non-fringe field mitigation element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A shielded power coupling device for use in a computed tomography apparatus, comprising:
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an inductive field generating element configured to convert electric power to an inductive coupling field; an inductive field receiving element configured to convert the inductive coupling field to electric power; a primary and secondary core separated by a core airgap; and a shell comprising at least two segments that are fastened together to form a substantially toroidal structure, the shell comprising a fringe field mitigation element that is configured to mitigate magnetic flux, escaping from at least one of the primary core or the secondary core near the core airgap, that is generated by at least one of the inductive field generating element or the inductive field receiving element, the fringe field mitigation element comprising an electrically conductive wire that is inserted into the shell once the at least two segments are fastened together. - View Dependent Claims (11, 12, 13)
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14. A radiation imaging system, comprising:
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a stator; a rotor configured for movement relative to the stator; a radiation source coupled to the rotor; a detector array coupled to the rotor; and a power coupling device configured to transfer electric power between the stator and the rotor for supplying power to at least one of the radiation source or the detector array, comprising; an inductive field generating element configured to convert electric power to an inductive coupling field; an inductive field receiving element configured to convert the inductive coupling field to electric power; a primary and secondary core separated by a core airgap; and a shell comprising; a fringe field mitigation element comprising an electrically conductive wire and configured to mitigate magnetic flux generated by at least one of the inductive field generating element or the inductive field receiving element and escaping from at least one of the primary core or the secondary core near the core airgap, and a non-fringe field mitigation element comprising at least two segments that are coupled together to form a substantially circular structure, the electrically conductive wire inserted into channels of the at least two segments. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification