KR20130060639A - Axial flow fan motor - Google Patents

Axial flow fan motor Download PDF

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Publication number
KR20130060639A
KR20130060639A KR1020110126806A KR20110126806A KR20130060639A KR 20130060639 A KR20130060639 A KR 20130060639A KR 1020110126806 A KR1020110126806 A KR 1020110126806A KR 20110126806 A KR20110126806 A KR 20110126806A KR 20130060639 A KR20130060639 A KR 20130060639A
Authority
KR
South Korea
Prior art keywords
circuit board
fan motor
rotor
suction plate
core
Prior art date
Application number
KR1020110126806A
Other languages
Korean (ko)
Inventor
김덕식
Original Assignee
삼성전기주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020110126806A priority Critical patent/KR20130060639A/en
Publication of KR20130060639A publication Critical patent/KR20130060639A/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/03—Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices

Abstract

The present invention relates to an axial fan motor. Axial flow fan motor according to the present invention is a single-phase core type, by removing the magnet that pulls the rotor in the lower direction from the bottom of the shaft, and instead of dividing the suction plate of the magnetic material on the circuit board, it is easy to change the cogging generation position At the same time there is an effect that can easily prevent the injury of the rotor.

Description

Axial flow fan motor {AXIAL FLOW FAN MOTOR}

The present invention relates to an axial fan motor.

Axial flow fan motors are used for cooling various electronic equipments, and single-phase core-type brushless (BLDC) motors are mainly used for cost reduction and simple structure.

The brushless direct current (BLDC) motor of the single-phase core type is disclosed in detail in Patent Document 1, which is briefly described as follows. That is, according to the said (patent document 1), the axial fan motor normally contains the stator provided in the frame, the rotor provided with the magnet, and the armature provided with the core.

Therefore, the rotor rotates with the electromagnetic force generated by the magnetic interaction between the armature and the magnet to rotate the blade (impeller), thereby cooling various electronic equipment.

Meanwhile, in the case of the single-phase core type motor, there is a dead point at which the torque of the motor becomes zero at the energization change point of the coil, and when the motor stops at this point, the motor is not operated again. The shape of the core is asymmetrically modified to artificially change the location of cogging.

That is, when the shape of the core is deformed asymmetrically, dead points described above can be easily avoided, so that the cogging occurrence position can be artificially changed.

US 7759832 B2

However, the above-described asymmetric core has difficulty in predicting the cogging position in advance, and thus, it is difficult to find the cogging position experimentally. Asymmetric cores are also difficult to manufacture.

In addition, the single-phase core type motor has a structure in which the magnet is attached to the lower side of the shaft to pull the rotor downward, as shown in (8) for stable rotation of the rotor, but in this case an additional magnet This is necessary, and the action of pulling the center of the motor has a structure that is vulnerable to the shaking of the side.

Therefore, the present invention is to solve the problem of artificially changing the cogging occurrence position using an asymmetric core, and at the same time to solve the problem of preventing the injury by pulling the center of the rotor through a separate magnet.

SUMMARY OF THE INVENTION An object of the present invention is to provide an axial fan motor capable of easily changing a cogging generation position and at the same time preventing an injury of a rotor.

In order to achieve the above object,

The present invention includes a stator including a bearing in which the shaft is rotatably installed, a holder, and a circuit board disposed below the holder;

An armature comprising a core disposed on a side of the holder;

A rotor rotatably installed on an upper portion of the shaft, the rotor including at least one blade having a rotor, and a magnet provided at the rotor case facing a core; And

It characterized in that it comprises a suction plate of the magnetic body dividedly disposed on the circuit board.

In addition, the core according to the present invention is characterized in that the poles on which the coil is wound are symmetrically formed.

In addition, the circuit board according to the present invention is formed in a circular shape, characterized in that the suction plate is divided radially arranged on the circuit board.

In addition, the suction plate according to the invention is characterized in that the circuit board is arranged symmetrically divided.

In addition, the suction plate according to the invention is characterized in that the asymmetrically divided arrangement on the circuit board.

According to the present invention, the suction plate of the magnetic body is dividedly disposed and attached to the circuit board, thereby artificially changing the cogging occurrence position through interaction with the magnet and simultaneously pulling the rotor downward to prevent injury. Therefore, there is no restriction on the shape of the core to facilitate its manufacture and improve the structure vulnerable to the side shake of the rotor.

On the other hand, the suction plate of the magnetic material is radially symmetrically or asymmetrically arranged to be attached to the circuit board, there is an effect that can be freely changed cogging generation position.

1 is a cross-sectional view showing an embodiment of a fan motor according to the present invention.
Figure 2 is a plan view showing an embodiment of a core according to the present invention.
3 is a plan view showing that the suction plate according to the present invention is radially divided on a circuit board.
4 to 5 are plan views showing the suction plate according to the invention divided radially symmetrically arranged on the circuit board.
6 to 7 are plan views showing a suction plate divided radially asymmetrically disposed on a circuit board according to the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and embodiments associated with the accompanying drawings. Meanwhile, in describing the present invention, detailed descriptions of related well-known techniques that may unnecessarily obscure the subject matter of the present invention will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The axial fan motor 1 according to the present invention is a single-phase core type, and includes a stator, an armature 30, a rotor provided with a blade (impeller), and a pulling plate of a magnetic material. .

The stator 20 is provided in the upper center of the frame (Frame) that is a fixed structure, as shown in FIG. The stator 20 includes a bearing 21 and a holder 22 in which a shaft is rotatably installed, and is implemented in a manner in which the bearing 21 is embedded in the holder 22. A lubrication component is interposed between the bearing 21 and the shaft 40a to assist the rotation operation.

Accordingly, the holder 22 forms a thrust structure for axially supporting the bearing 21 and the shaft 40a rotatably installed on the bearing 21. In an embodiment, the holder 22 Coupling portion 22a is formed at the bottom of) to support the bearing 21 and the shaft 40a in the axial direction. Obviously, the coupling part 22a may be provided integrally or separately from the holder 22.

In addition, the stator 20 includes a circuit board 23 disposed below the holder 22 to supply external power to the armature 30, wherein the circuit board 23 is usually a printed circuit board. The circuit board is installed on the upper part of the frame 10.

Meanwhile, the armature 30 includes a core 31 disposed outside the holder 22. A coil is wound around the core 31 to generate electromagnetic force through magnetic interaction with a magnet provided in the rotor 40, thereby rotating the rotor 40 to rotate the blade 42. Cooling through.

In this case, as shown in FIG. 2, the core 31 is formed to have a symmetrical shape of a pole around which a coil is wound. That is, in the axial fan motor 1 according to the present invention, as the suction plate 50 is dividedly disposed and attached to the circuit board 23, the pole 31a is asymmetrically formed as in the related art, thereby artificially changing the cogging occurrence position. There is no need.

Therefore, since the axial fan motor 1 according to the present invention does not have any restriction on the shape of the core 31, there is a side that is easy to manufacture.

The rotor 40 includes a rotor case installed on an upper portion of the shaft 40a, and the rotor case 41 is provided with at least one blade 42. At this time, the rotor case 41 is installed in the shaft 40a by a press-fit method, and a pair of blades 42 are provided in the outer circumference thereof.

In addition, the rotor case 41 is provided with the magnet 43 described above to face the core 31, thereby generating an electromagnetic force through magnetic interaction. Therefore, the rotor 40 is rotated by the electromagnetic force generated between the magnet 43 and the core 31 to cool through the blade 42.

Meanwhile, the suction plate 50 according to the present invention is dividedly disposed on the circuit board 23 so as to face the lower side of the magnet 43 to artificially change a cogging occurrence position. The suction plate 50 is attached to the circuit board 23 by attaching a piece of magnetic material to the circuit board 23. Accordingly, the axial fan motor 1 stopped at a dead point is mutually connected with the magnet 43. It can be reactivated by action.

Here, the suction plate 50 is radially divided on the circuit board 23 so that the cogging generation position can be easily changed. That is, as shown in Figure 3, the circuit board 23 is formed in a circular shape, by separating the four magnetic metal pieces at an angle of 90 ° relative to the central portion (C) of the circuit board 23, the suction plate ( 50 is radially divided on the circuit board 23.

In addition, the suction plate 50 may be arranged radially symmetrically divided on the circuit board 23 so that the cogging occurrence position can be more easily changed, the embodiment is as follows.

That is, as shown in Figures 4 to 5, the circuit board 23 is formed in a circular shape, based on the center (C) of the circuit board 23, an even number of magnetic metal pieces consisting of six or eight pieces at equal intervals. By dividing, the suction plate 50 is radially symmetrically arranged on the circuit board 23.

On the other hand, the suction plate 50 may be radially asymmetrically divided on the circuit board 23, as an embodiment, as shown in Figure 6 to 7, to form a circuit board 23 in a circular shape, The suction plate 50 is radially formed on the circuit board 23 by dividing and attaching three or five odd pieces of magnetic metal pieces to the left or the right side with respect to the center C of the circuit board 23. As a result, the asymmetric partition is arranged.

Therefore, the axial fan motor 1 according to the present invention including the suction plate 50, as described above, by easily changing the cogging generation position, the magnet axial fan motor 1 stopped at the dead point (Dead Point) magnet ( At the same time, the rotor case 41 is pulled downward through the suction force of the suction plate 50, so that the rotor 40 does not rise and the blade 42 does not float. Rotate stably to cool various electronic equipment.

Although the present invention has been described in detail through the embodiments, this is to specifically describe the present invention, and the axial fan motor according to the present invention is not limited thereto, and the general knowledge of the art within the technical spirit of the present invention is provided. It is obvious that the alteration or improvement is possible by those who have it.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1-axial fan motor 10-frame
20-Stator 21-Bearing
22-holder 22a-coupling
23-Circuit Board 30-Armature
31-core 31a-pole
40-rotor 40a-shaft
41-Rotorcase 42-Blade
43-Magnet 50-Suction Plate

Claims (5)

A stator including a bearing on which the shaft is rotatably installed, a holder, and a circuit board disposed below the holder;
An armature comprising a core disposed on a side of the holder;
A rotor rotatably installed on an upper portion of the shaft, the rotor including at least one blade having a rotor, and a magnet provided at the rotor case facing a core; And
An axial flow fan motor, characterized in that it comprises a suction plate (Fulling Plate) of the magnetic body dividedly disposed on the circuit board.
The method according to claim 1,
The core is an axial fan motor, characterized in that the pole is wound symmetrically formed (Pole).
The method according to claim 1 or 2,
The circuit board is formed in a circular shape, the axial flow fan motor, characterized in that the suction plate is disposed radially divided on the circuit board.
The method according to claim 3,
The suction plate is an axial fan motor, characterized in that the symmetrically arranged on the circuit board.
The method according to claim 3,
The suction plate is an axial flow fan motor, characterized in that the asymmetrically divided on the circuit board.
KR1020110126806A 2011-11-30 2011-11-30 Axial flow fan motor KR20130060639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110126806A KR20130060639A (en) 2011-11-30 2011-11-30 Axial flow fan motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110126806A KR20130060639A (en) 2011-11-30 2011-11-30 Axial flow fan motor

Publications (1)

Publication Number Publication Date
KR20130060639A true KR20130060639A (en) 2013-06-10

Family

ID=48859031

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110126806A KR20130060639A (en) 2011-11-30 2011-11-30 Axial flow fan motor

Country Status (1)

Country Link
KR (1) KR20130060639A (en)

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