Circumferential confronting type motor
First Claim
1. A circumferential confronting type motor comprising:
- an armature core having a plurality of poles, each of the poles having a drive coil; and
a drive magnet positioned opposite to the armature core in a radial direction, the drive magnet having a plurality of divided magnetized sections separated from one another in an axial direction by a weaker-magnetized section, each of the divided magnetized sections having a magnetic center, wherein the magnetic centers of the divided magnetized sections are positioned symmetrical with respect to a magnetic center in the axial direction of the armature core.
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Accused Products
Abstract
A circumferential confronting type motor includes an armature core that has drive coils wound around its plurality of poles, and a drive magnet positioned opposite to the armature core in the radial direction. The drive magnet has a plurality of divided magnetized sections, each with a magnetic center, formed separated from each other in the axial direction by a non-magnetized section. The magnetic centers of the respective plurality of divided magnetized sections are provided in symmetrical positions with respect to a magnetic center in the axial direction of the armature core. Further, electromagnetic action between the drive magnet and the armature core causes the two to rotate relatively, while magnetic action between the plurality of divided magnetized sections and the armature core regulates their relative movements in the axial direction.
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Citations
20 Claims
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1. A circumferential confronting type motor comprising:
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an armature core having a plurality of poles, each of the poles having a drive coil; and
a drive magnet positioned opposite to the armature core in a radial direction, the drive magnet having a plurality of divided magnetized sections separated from one another in an axial direction by a weaker-magnetized section, each of the divided magnetized sections having a magnetic center, wherein the magnetic centers of the divided magnetized sections are positioned symmetrical with respect to a magnetic center in the axial direction of the armature core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A circumferential confronting type motor comprising:
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a rotor assembly with a ring-shaped drive magnet and a cylinder section in which a shaft hole is formed;
a stator assembly with a fixed shaft that is inserted in the shaft hole and that supports the rotor assembly in a rotatable manner, and an armature core positioned opposite to the drive magnet in the radial direction; and
a dynamic pressure bearing mechanism formed between an outer circumference surface of the fixed shaft and an inner circumference surface of the shaft hole, the drive magnet having a plurality of divided magnetized sections, each having a magnetic center, formed separated from one another in the axial direction by a weaker-magnetized section, wherein the magnetic centers of the respective plurality of divided magnetized sections are provided in symmetrical positions to a magnetic center in the axial direction of the armature core. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification