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US 6,724,106 B1Granted
Miniature brushless dc fan motor
AssigneeSunonwealth Electric Machine Industry Co., Ltd.
InventorsAlex Horng, Tso-Kuo Yin
Life of this patent
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Abstract
A miniature brushless dc fan motor comprises an annular housing, a bearing assembly, a permanent magnet set, a blade set and a coil set. The permanent magnet set is inserted into a hub of the blade set which is located at a center. A shaft is extended through the permanent magnet set to form a rotor. The coil set is secured to an inner circumference of the annular housing and radially aligned with the permanent magnet set. An air channel is formed between the permanent magnet set and the coil set, and adapted to accommodate the blade set.
Claims7
A miniature brushless dc fan motor, comprising:
- an annular housing including at least one bearing;
- a blade set including a hub and a plurality of blades;
- a permanent magnet set consisted of poles and being passed through a shaft which is pivoted in the bearing, the permanent magnet set is inserted into the hub of the blade set;
- a coil set being secured to an inner circumference of the annular housing and aligned with the poles of the permanent magnet set;
- and
- a radial air gap formed between the permanent magnet set and the coil set, and being served as an air channel which is adapted to accommodate the blade set;
- wherein when the coil set is energized, the coil set is induced with the permanent set and thus the blade set is rotated.
4 more elements
Dependencies are inferred from the claim text.