Methods for forming shield materials onto inductive coils
First Claim
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1. A shield for an annular coil, the shield comprising:
- a first portion; and
a second portion coupled to the first portion, wherein the first portion and the second portion are contoured over at least two surfaces of the annular coil such that the first portion and the second portion fill within at least a portion of void spaces defined between stacked coils positioned along the at least two surfaces of the annular coil.
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Abstract
Methods of and systems for directing flux from a transmit coil to a receive coil within an inductive power transfer system are disclosed. For example, a transmit coil can be shielded with a contoured shield made from a ferromagnetic material. The contoured shield contours to several surfaces of the transmit coil so as to define a single plane through which magnetic flux is directed to a receive coil.
57 Citations
20 Claims
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1. A shield for an annular coil, the shield comprising:
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a first portion; and a second portion coupled to the first portion, wherein the first portion and the second portion are contoured over at least two surfaces of the annular coil such that the first portion and the second portion fill within at least a portion of void spaces defined between stacked coils positioned along the at least two surfaces of the annular coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A shield for an annular coil, the shield comprising:
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a first portion comprising a plurality of individual petals; and a second portion comprising a ring and coupled to the first portion, wherein the first portion and the second portion are contoured over at least two surfaces of the annular coil such that the first portion and the second portion fill within at least a portion of void spaces defined between stacked coils positioned along the at least two surfaces of the annular coil. - View Dependent Claims (13, 14, 15, 16)
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17. An inductive charging system comprising:
an electronic device comprising; an annular receive coil; and a shield contoured over at least two surfaces of the receive coil such that the shield fills within at least a portion of void spaces defined between stacked coils positioned along the at least two surfaces of the receive coil. - View Dependent Claims (18, 19, 20)
Specification