CN2388772Y - Axial magnetic-field brushless dc machine - Google Patents
Axial magnetic-field brushless dc machine Download PDFInfo
- Publication number
- CN2388772Y CN2388772Y CN 99228960 CN99228960U CN2388772Y CN 2388772 Y CN2388772 Y CN 2388772Y CN 99228960 CN99228960 CN 99228960 CN 99228960 U CN99228960 U CN 99228960U CN 2388772 Y CN2388772 Y CN 2388772Y
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- China
- Prior art keywords
- sliding bearing
- utility
- model
- axial magnetic
- pair
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model relates to an axial magnetic-field brushless DC motor, which comprises a shaft, mounting boards, and a stator assembly, wherein, the mounting boards are positioned at ends of the shaft; the stator assembly is composed of a motor control circuit board, a stator coil, and hall elements; the stator coil is bonded on the circuit board; the hall elements are arranged on the stator coil. The utility model is characterized in that a cylindrical sliding bearing is directly sheathed on the shaft; two ends of the sliding bearing are fixed with a pair of steel disks by bolts; the inner side of the steel disks are bonded with a pair of annular permanent magnets; the motor control circuit board is positioned between the two permanent magnets. The utility model which is integrated with traditional bearings and bearing seats has the advantages of simple structure, low cost and price, low noise, and long service life. The utility model is suitable for exhaust fans with small axial dimensions.
Description
The utility model relates to a kind of DC motor, exactly is a kind of axial magnetic field brshless DC motor.
Existing axial magnetic field brshless DC motor need to use rolling bearing and the bearing pedestal that is mated, and rolling bearing and high-precision bearing pedestal cost price is higher, and when especially requiring low noise, its cost price is higher.
The purpose of this utility model be to provide a kind of improved, with bearing and bearing pedestal axial magnetic field brshless DC motor that combine together, that can make the big reduction of cost price.
Technical solution of the present utility model is: directly be inserted in a cylindrical sliding bearing on the axle, and the sliding bearing two ends a pair of steel disk of bolt, a pair of annular permanent magnet of the inboard bonding of steel disk is equipped with the Electric Machine Control wiring board between two permanent magnets.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model operation principle schematic diagram.
Referring to Fig. 1: directly be inserted in a cylindrical sliding bearing 1 on the axle 15, sliding bearing 1 is made by Cu-base powder or other powdered metallurgical material.Fluted on its outer rim, this groove mouth is moulded cover 2 bonding sealings by annular, makes it form cavity, cavity built-in can be in powdered metallurgical material the felt mud 9 of penetrating oil, with lubricating grease as sliding bearing 1 rotation.The two ends of sliding bearing 1 are clamped it by two steel disks 4, and are fixed with bolt 7 and nut 8 and are one.The diameter of steel disk 4 is greater than the diameter of sliding bearing 1, the inboard correspondence of two steel disks 4 is bonded with a pair of annular permanent magnet 3, place an Electric Machine Control wiring board 5 in the middle of a pair of annular permanent magnet 3 of corresponding bonding, be bonded with threephase stator coil 6 on this wiring board 5, the centre of every phase stator coil 6 is provided with Hall element 12.Electric Machine Control wiring board 5 is fixed on the mounting panel 10 by screw 16.One end of axle 15 is fixed in the copper sheathing 11 of riveting in mounting panel 10, separates with a plain washer 17 between copper sheathing 11 and the sliding bearing 1, and its other end then is inserted in plain washer 17 and wave washer 13, and is fixing with back-up ring 14 again.
Its operation principle: behind the power turn-on switch, be located at Hall element 12 (see figure 2) under the induction in permanent magnet 3 magnetic fields on the stator coil 6, export a voltage signal respectively, through the amplifier amplification ratio after, convert three control signals to, three control signals are controlled the conducting of one road power switch component again separately, three road power switch components join with threephase stator coil 6 respectively again, make threephase stator coil 6 according to certain phase sequence conducting, produce electromagnetic force drive permanent magnet 3 with permanent magnet 3 the action of a magnetic fields and also on axle 15, rotate by permanent magnet 3 drive steel disks 4 and sliding bearing 1.The existing mature technology of stator winding that the utility model adopts and circuit for controlling motor is not so give unnecessary details at this.
Compared with prior art, the utility model is owing to combining bearing and bearing block together, so that whole Machine is simple in structure, the big reduction of cost price, and noise is low, the life-span long, control is convenient, is suitable for The exhaust fans that axial dimension is littler use.
Claims (2)
1, a kind of axial magnetic field brshless DC motor, comprise axle (15) and fix the mounting panel (10) of this axle head and go up the stator module that the stator coil (6) that bonds, Hall element (12) that this coil (6) is provided with are formed by Electric Machine Control wiring board (5), this wiring board (5), it is characterized in that: directly be inserted in a cylindrical sliding bearing (1) on the described axle (15), a pair of steel disk (4) is fixed with bolt (7) in sliding bearing (1) two ends, the inboard bonding of steel disk (4) a pair of annular permanent magnet (3) is equipped with Electric Machine Control wiring board (5) between two permanent magnets (3).
2, a kind of axial magnetic field brshless DC motor according to claim 1 is characterized in that: fluted on the outer rim of described sliding bearing (1), this groove mouth is moulded the sealing of cover (2) bonding by annular, makes it form cavity, the built-in felt mud of cavity (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228960 CN2388772Y (en) | 1999-07-20 | 1999-07-20 | Axial magnetic-field brushless dc machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228960 CN2388772Y (en) | 1999-07-20 | 1999-07-20 | Axial magnetic-field brushless dc machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2388772Y true CN2388772Y (en) | 2000-07-19 |
Family
ID=34018259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99228960 Expired - Fee Related CN2388772Y (en) | 1999-07-20 | 1999-07-20 | Axial magnetic-field brushless dc machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2388772Y (en) |
-
1999
- 1999-07-20 CN CN 99228960 patent/CN2388772Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |