CN102957291A - Permanent magnet brushless direct current motor - Google Patents
Permanent magnet brushless direct current motor Download PDFInfo
- Publication number
- CN102957291A CN102957291A CN 201210481996 CN201210481996A CN102957291A CN 102957291 A CN102957291 A CN 102957291A CN 201210481996 CN201210481996 CN 201210481996 CN 201210481996 A CN201210481996 A CN 201210481996A CN 102957291 A CN102957291 A CN 102957291A
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- CN
- China
- Prior art keywords
- permanent magnet
- hall
- hall element
- rear end
- motor shaft
- 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.)
- Pending
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- Brushless Motors (AREA)
Abstract
The invention relates to a Hall external permanent magnet brushless direct current motor, which comprises a shell, a stator arranged in the shell, a rotor and a motor shaft mounted on the rotor, wherein the motor shaft is connected with the rear end cover of the shell through a bearing, the motor is characterized in that a Hall bracket of a Hall element is connected and mounted on the exterior of the rear end cover; a magnetic steel tray connected with the motor shaft is arranged at the lower part of the Hall bracket; a permanent magnet is arranged inside the magnetic steel tray; the Hall element determines the position of the stator through inducing change of the magnetic field position of the permanent magnet in the magnetic steel tray; a cover cap is connected to the open mouth of the rear end cover. The permanent magnet brushless direct current motor can prolong the useful life of the Hall element; avoids the influence of high temperature environment on the signal of the Hall element; is convenient to dismantle and maintain; and does not damage the machine body.
Description
Technical field
The present invention relates to technical field of motors, the external permanent-magnet brushless DC electric machine of especially a kind of Hall.
Background technology
Traditional brshless DC motor is that Hall element is installed on the iron core of motor stator, motor is in febrile state always during machine operation, can cause Hall without the damage of part, in case and Hall element damage dismounting, change difficult, for maintenance and the use of motor brings impact.
Summary of the invention
The object of the present invention is to provide a kind of permanent-magnet brushless DC electric machine that can prolong Hall element useful life and conveniently it be carried out the dismounting maintenance.
The present invention is realized by following technical scheme: a kind of permanent-magnet brushless DC electric machine, comprise housing, and place stator, the rotor in the housing and be installed on epitrochanterian motor shaft, described motor shaft is connected by bearing with the rear end cap of housing; The outside of described rear end cap is connected and installed with the Hall support of Hall element; The bottom of described Hall support is provided with the magnet steel pallet that is connected with motor shaft; Be provided with permanent magnet in the described magnet steel pallet, Hall element is by determining the position of stator to the variation sensing of the magnetic field position of permanent magnet in the magnet steel pallet; The opening of described rear end cap is connected with a cover cap.
The invention has the beneficial effects as follows: a kind of permanent-magnet brushless DC electric machine can prolong Hall element useful life, avoids hot environment on the impact of Hall element signal, and convenient it is carried out the dismounting maintenance, can not produce damage to body.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Accompanying drawing 1 is a kind of structural representation of permanent-magnet brushless DC electric machine.
Among the figure, 1. housing, 2. stator, 3. rotor, 4. rear end cap, 5. bearing, 6. magnet steel pallet, 7. Hall support, 8. cover cap, 9. motor shaft.
Embodiment
Can be found out by accompanying drawing 1, a kind of permanent-magnet brushless DC electric machine comprises housing 1, places stator 2, the rotor 3 in the housing and is installed on motor shaft 9 on the rotor 3 that described motor shaft 9 is connected by bearing 5 with the rear end cap 4 of housing 1; The outside of described rear end cap 4 is connected and installed with the Hall support 7 of Hall element; The bottom of described Hall support 7 is provided with the magnet steel pallet 6 that is connected with motor shaft 9; Be provided with permanent magnet in the described magnet steel pallet 6, Hall element is by determining the position of stator 2 to the variation sensing of the magnetic field position of permanent magnet in the magnet steel pallet 6; The opening of described rear end cap 4 is connected with a cover cap 8.
Described Hall support 7 is provided with screwed hole, is fixedly connected with rear end cap 4 by screw.
Hall element among the present invention is installed on the outer end of housing 1, the discrete thermal source stator of unit, can be dispelled the heat timely, improved its useful life, avoided the impact of hot environment on the Hall element signal, and convenient when Hall element is changed, reduced the damage rate of Hall element wiring board in assembling process, only need open cover cap 8 and can dismantle, change or keep in repair, avoid the damage to body.
Claims (1)
1. permanent-magnet brushless DC electric machine, comprise housing (1), place stator (2), the rotor (3) in the housing and be installed on motor shaft (9) on the rotor (3), described motor shaft (9) is connected by bearing (5) with the rear end cap (4) of housing (1), it is characterized in that: the outside of described rear end cap (4) is connected and installed with the Hall support (7) of Hall element; The bottom of described Hall support (7) is provided with the magnet steel pallet (6) that is connected with motor shaft (9), be provided with permanent magnet in the described magnet steel pallet (6), Hall element is by determining the position of stator (2) to the variation sensing of the magnetic field position of permanent magnet in the magnet steel pallet (6); The opening of described rear end cap (4) is connected with a cover cap (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210481996 CN102957291A (en) | 2012-11-25 | 2012-11-25 | Permanent magnet brushless direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210481996 CN102957291A (en) | 2012-11-25 | 2012-11-25 | Permanent magnet brushless direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102957291A true CN102957291A (en) | 2013-03-06 |
Family
ID=47765665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210481996 Pending CN102957291A (en) | 2012-11-25 | 2012-11-25 | Permanent magnet brushless direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102957291A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418380A (en) * | 2018-04-24 | 2018-08-17 | 深圳市精锐昌科技有限公司 | A kind of novel brushless motor |
-
2012
- 2012-11-25 CN CN 201210481996 patent/CN102957291A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418380A (en) * | 2018-04-24 | 2018-08-17 | 深圳市精锐昌科技有限公司 | A kind of novel brushless motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130306 |