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 fixed in the presence of exterior pressure, the planar coil comprising a plurality of layers; and
a magnetic diaphragm disposed inside the housing and separated by a distance from the planar coil, the magnetic diaphragm comprising a layer of magnetic micro-powder and being moveable in the presence of the exterior pressure to induce an electromotive force upon the planar coil,wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, and the plurality of layers is arranged such that a direction of the induced electromotive force upon the layers of the planar coil are synchronized among the layers.
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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.
16 Citations
13 Claims
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1. An electromagnetic device comprising:
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a housing; a planar coil disposed inside the housing and fixed in the presence of exterior pressure, the planar coil comprising a plurality of layers; and a magnetic diaphragm disposed inside the housing and separated by a distance from the planar coil, the magnetic diaphragm comprising a layer of magnetic micro-powder and being moveable in the presence of the exterior pressure to induce an electromotive force upon the planar coil, wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, and the plurality of layers is arranged such that a direction of the induced electromotive force upon the layers of the planar coil are synchronized among the layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electromagnetic device comprising:
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a housing; a planar coil disposed inside the housing and fixed in the presence of exterior pressure, the planar coil comprising a plurality of layers; and a magnetic diaphragm disposed inside the housing and comprising a layer of magnetic micro-powder, wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, wherein the planar coil is separated by a distance from the magnetic diaphragm, and the magnetic diaphragm is moveable in the presence of the exterior pressure to induce an electromotive force upon the planar coil, the planar coil comprising;
wherein the planar coil comprises a top layer, a bottom layer; and
a connector electrically connecting the top layer and the bottom layer through the insulation layer, and the plurality of layers is arranged such that a direction of the induced electromotive force upon the layers of the planar coil are synchronized among the layers.
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Specification