Moving-Magnet Electromagnetic Device with Planar Coil
First Claim
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1. An electromagnetic device comprising:
- a housing;
a planar coil disposed inside the housing; and
a magnetic diaphragm disposed inside the housing,wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm,wherein the planar coil is separated from the magnetic diaphragm,wherein the magnetic diaphragm is moveable in the presence of an exterior pressure.
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Abstract
An electromagnetic device includes a housing, a planar coil disposed inside the housing, and a magnetic diaphragm disposed inside the housing, wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, wherein the planar coil is separated from the magnetic diaphragm, and wherein the magnetic diaphragm is moveable in the presence of an exterior pressure.
21 Citations
17 Claims
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1. An electromagnetic device comprising:
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a housing; a planar coil disposed inside the housing; and a magnetic diaphragm disposed inside the housing, wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, wherein the planar coil is separated from the magnetic diaphragm, wherein the magnetic diaphragm is moveable in the presence of an exterior pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of making magnetic diaphragm, the method comprising:
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packaging magnetic powders; mixing the magnetic powders into a melted polymer; and infiltrating the magnetic powders into the polymer film through thermal pressing and stretching. - View Dependent Claims (16)
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11. A method of making magnetic diaphragm, the method comprising:
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mixing magnetic powders within a gel; coating the gel onto a first polymer film; coating the gel onto a second polymer film; combining the first coated polymer film with the second coated polymer film; and magnetizing the combined film. - View Dependent Claims (12, 13, 14, 15, 17)
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Specification