Moving magnet motor and transducer with moving magnet motor
First Claim
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1. A moving magnet motor, comprising:
- a stator comprising first and second spaced coil-wound cores that are separated by an elongated gap;
an elongated magnet located at least in part in the gap and lying generally along a motor depth axis that is in the gap and is generally uniformly offset from the cores, where the magnet has poles;
wherein the motor has a width axis that is perpendicular to the depth axis and is generally uniformly offset from the cores;
wherein the magnet has a width along the motor width axis and the cores each have a width along the motor width axis;
wherein along the motor depth axis the magnet or a pole of the magnet has a variable width.
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Abstract
A moving magnet motor with a stator comprising first and second spaced coil-wound cores that each have a width, the cores separated by an elongated gap, and an elongated magnet located at least in part in the gap and lying generally along a motor depth axis that is in the gap and is generally uniformly offset from the cores, where the magnet has poles. The motor has a width axis that is perpendicular to the depth axis and is generally uniformly offset from the cores. The magnet has a width along the motor width axis and the cores each have a width along the motor width axis. Along the motor depth axis the ratio of the width of the magnet or a pole of the magnet to the width of a core varies.
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Citations
26 Claims
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1. A moving magnet motor, comprising:
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a stator comprising first and second spaced coil-wound cores that are separated by an elongated gap; an elongated magnet located at least in part in the gap and lying generally along a motor depth axis that is in the gap and is generally uniformly offset from the cores, where the magnet has poles; wherein the motor has a width axis that is perpendicular to the depth axis and is generally uniformly offset from the cores; wherein the magnet has a width along the motor width axis and the cores each have a width along the motor width axis; wherein along the motor depth axis the magnet or a pole of the magnet has a variable width. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An electro-acoustic transducer, comprising:
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a housing; a radiating surface coupled to the housing such that it can move relative to the housing; and a moving magnet motor that is configured to move the radiating surface relative to the housing so as to generate sound, wherein the moving magnet motor comprises a stator comprising spaced cores that are separated by an elongated gap and an elongated magnet located at least in part in the gap, wherein the magnet has a central portion and two end portions, and wherein the magnet or a pole of the magnet is tapered in width from the central portion to each end portion. - View Dependent Claims (24, 25)
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26. A moving magnet motor, comprising:
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a stator comprising first and second spaced coil-wound cores that are separated by an elongated gap; an elongated magnet located at least in part in the gap and lying generally along a motor depth axis that is in the gap and is generally uniformly offset from the cores, wherein the motor has a width axis that is perpendicular to the depth axis and is generally uniformly offset from the cores; wherein the magnet; has faces that face each of the cores; comprises two portions that have opposite magnetic poles on the same faces of the magnet, where the portions meet at a border and are each tapered along the motor depth axis in a complementary fashion; and has a relatively constant width along the motor width axis.
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Specification