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US 2013/0093283 A1Published application
Spindle motor
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsHo Jun Yoo, Kyung Su Park
Life of this patent
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Abstract
Disclosed herein is a spindle motor. The spindle motor uses a general (non neodymium) permanent magnet rather than a neodymium magnet as a permanent magnet and compensates for a reduced counter electromotive force (B-EMF) value by allowing the center of a connection part formed in a round shape between poles around which coils are wound to be different from that of a core to increase a coil inductance value, thereby making it possible to easily sense and control a rotation state of the spindle motor.
Claims3
A spindle motor comprising:
- an armature including a core;
- a rotor disposed at an upper portion of the armature and including a permanent magnet facing the core;
- and
- a stator having the armature provided at an upper portion thereof and rotatably supporting the rotor,
- wherein the core has poles radially arranged and formed based on the center and having coils wound therearound and has a connection part formed between the poles and having the center different from the center.
2 more elements
Dependencies are inferred from the claim text.