IP Library › Patent Application 15467285
Patent Application
App. No. 15/467,285

MICRO FAN

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Quick Facts
Patent No.
US None
App. No.
15/467,285
Abstract

A micro fan is provided. The micro fan includes a rotor and a stator. The stator includes an axial induced coil unit and a circuit board. The axial induced coil unit is made by twining a coil in an axial direction for at least two layers and in a radial direction for at least two layers.

Claims (23)

1 . A micro fan, comprising:

a rotor; and

a stator, comprising an axial induced coil unit and a circuit board, wherein the axial induced coil unit is made by twining a coil in an axial direction for at least two layers and in a radial direction for at least two layers.

2 . A micro fan, comprising:

a rotor; and

a stator, comprising an axial induced coil unit and a circuit board, wherein the axial induced coil unit is made by twining a coil into a flat-shaped bundle.

3 . A micro fan, comprising:

a rotor; and

a stator, comprising an axial induced coil unit and a circuit board, wherein the stator is produced by the following steps:

providing the axial induced coil unit;

directly mounting the axial induced coil unit on the circuit board by surface mount technology, and the axial induced coil unit is a magnetic pole unit of the stator.

4 . The micro fan as claimed in claim 3 , wherein the axial induced coil unit is made by twining a coil in a radial direction for multilayers.

5 . The micro fan as claimed in claim 3 , wherein the axial induced coil unit is made by twining a coil in a radial direction for multilayers and in an axial direction for multilayers.

6 . The micro fan as claimed in claim 3 , wherein the axial induced coil unit is made by twining a coil into a circular-shaped bundle.

7 . The micro fan as claimed in claim 3 , wherein the axial induced coil unit is made by twining a coil into a flat-shaped bundle.

8 . The micro fan as claimed in claim 3 , wherein there is no magnetic conduction element disposed in a center of the axial induced coil unit.

9 . The micro fan as claimed in claim 3 , wherein the stator further comprises a bearing, and the bearing passes through a center of the circuit board.

10 . The micro fan as claimed in claim 9 , further comprising a fan frame, wherein the rotor is disposed on the fan frame, and the stator is affixed to the fan frame.

11 . The micro fan as claimed in claim 10 , further comprising a magnetic conduction sheet, wherein the magnetic conduction sheet is disposed on the fan frame and corresponds to the axial induced coil unit.

12 . The micro fan as claimed in claim 9 , wherein the rotor comprises a magnetic ring, a magnetic conduction shield and a plurality of blades, the magnetic conduction shield is disposed between the magnetic ring and the blades, the magnetic conduction shield comprises a shaft, and the shaft passes through the bearing.

13 . The micro fan as claimed in claim 12 , further comprising a wear-resistant pad, wherein the wear-resistant pad is disposed on the fan frame, and the shaft abuts the wear-resistant pad.

14 . The micro fan as claimed in claim 3 , wherein the stator further comprises a micro controller, and the micro controller is disposed on the circuit board.

15 . The micro fan as claimed in claim 3 , wherein the two ends of the axial induced coil unit are formed by two connection terminals.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 24, 2017
From: LU, CHAO-WEN; LEE, CHE-WEI; TAN, CHUNG-CHIAO
To: DELTA ELECTRONICS, INC.
Reel/Frame 041721/0960 →