CN214479913U - External rotor motor without demagnetization - Google Patents
External rotor motor without demagnetization Download PDFInfo
- Publication number
- CN214479913U CN214479913U CN202120321969.4U CN202120321969U CN214479913U CN 214479913 U CN214479913 U CN 214479913U CN 202120321969 U CN202120321969 U CN 202120321969U CN 214479913 U CN214479913 U CN 214479913U
- Authority
- CN
- China
- Prior art keywords
- rotor
- permanent magnet
- stator
- additional magnetic
- end cover
- 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
Links
- 230000005347 demagnetization Effects 0.000 title claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 abstract description 3
- 239000004411 aluminium Substances 0.000 abstract 1
- 230000005389 magnetism Effects 0.000 abstract 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model relates to a permanent-magnet machine technical field, and disclose external rotor electric machine of never demagnetization, including front end housing, stator, rotor shaft, permanent magnet rotor, heat conduction aluminium spare, ring flange, rotor core, permanent magnet, outer additional magnetic pole, inlayer additional magnetic pole and hinder the magnetism space. When the motor operates, the magnetic field of the permanent magnet in the permanent magnet rotor forms a closed magnetic circuit with the stator after passing through the outer additional magnetic pole and the inner additional magnetic pole of the permanent magnet rotor, when the motor operates, the stator magnetic field and the magnetic field of the permanent magnet rotor form the same-direction closed magnetic circuit all the time through the corresponding additional magnetic poles, and the stator magnetic field only has a magnetizing effect on the permanent magnet in the permanent magnet rotor, so that the motor rotor can be ensured not to be demagnetized forever.
Description
Technical Field
The utility model relates to a permanent-magnet machine technical field specifically is external rotor electric machine of never demagnetization.
Background
With the development of motor technology and permanent magnet materials, the permanent magnet motor has been widely applied to generator systems and motors due to its advantages of high efficiency, high power density, high power factor, etc. The permanent magnet motor mostly comprises a front end cover, a rear end cover, a motor shell, a stator, a permanent magnet rotor, fan blades, a fan housing, a bearing and other components. However, the permanent magnet on the rotor of the permanent magnet motor at the present stage has an irreversible demagnetization phenomenon in the long-term use process. One is the demagnetization phenomenon of the permanent magnet caused by overhigh temperature of the motor, and the other is the demagnetization phenomenon caused by armature reaction.
SUMMERY OF THE UTILITY MODEL
The utility model mainly provides an external rotor electric machine who never demagnetizes, permanent magnet electric machine's among the solution prior art permanent magnet electric machine's permanent magnet has irreversible demagnetization phenomenon's problem in long-term use.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the permanent demagnetization-free outer rotor motor comprises a front end cover, a stator, a rotor shaft and a permanent magnet rotor, wherein a heat conduction aluminum piece is arranged on the front end cover, the stator is sleeved on the heat conduction aluminum piece, the rotor shaft is sleeved in the front end cover and the heat conduction aluminum piece and is rotationally connected with the front end cover and the heat conduction aluminum piece, a flange plate is arranged on the rotor shaft, and the permanent magnet rotor is arranged on the flange plate and is sleeved outside the stator through the flange plate; the permanent magnet rotor comprises a rotor core and permanent magnets, the permanent magnets are circumferentially arrayed on the rotor core and divide the rotor core into outer additional magnetic poles and inner additional magnetic poles, and magnetic resistance gaps are arranged on the rotor core corresponding to the two sides of the permanent magnets.
Further, the rotor shaft is rotatably connected with the front end cover and the heat-conducting aluminum piece through a bearing.
Has the advantages that: when the motor operates, the magnetic field of the permanent magnet in the permanent magnet rotor forms a closed magnetic circuit with the stator after passing through the outer additional magnetic pole and the inner additional magnetic pole of the permanent magnet rotor, when the motor operates, the stator magnetic field and the magnetic field of the permanent magnet rotor form the same-direction closed magnetic circuit all the time through the corresponding additional magnetic poles, and the stator magnetic field only has a magnetizing effect on the permanent magnet in the permanent magnet rotor, so that the motor rotor can be ensured not to be demagnetized forever.
Drawings
Fig. 1 is a schematic structural diagram of the external rotor motor of the embodiment:
fig. 2 is a schematic structural diagram of the permanent magnet rotor of the present embodiment:
reference numerals: the magnetic field generator comprises a front end cover 1, a stator 2, a rotor shaft 3, a heat conduction aluminum piece 4, a flange plate 5, a rotor iron core 6, a permanent magnet 7, an outer additional magnetic pole 8, an inner additional magnetic pole 9 and a magnetic resistance gap 10.
Detailed Description
The technical solution of the external rotor motor never demagnetized according to the present invention will be described in further detail with reference to the following embodiments.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and fig. 2, the external rotor motor without demagnetization in this embodiment includes a front end cover 1, a stator 2, a rotor shaft 3, and a permanent magnet rotor, and is characterized in that: the front end cover 1 is provided with a heat conduction aluminum part 4, the stator 2 is sleeved on the heat conduction aluminum part 4, the rotor shaft 3 is sleeved in the front end cover 1 and the heat conduction aluminum part 4 and is rotationally connected with the front end cover 1 and the heat conduction aluminum part 4, the rotor shaft 3 is provided with a flange 5, and the permanent magnet rotor is arranged on the flange 5 and is sleeved outside the stator 2 through the flange 5; the permanent magnet rotor comprises a rotor core 6 and permanent magnets 7, the permanent magnets 7 are circumferentially arrayed on the rotor core 6 and divide the rotor core 6 into an outer additional magnetic pole 8 and an inner additional magnetic pole 9, and magnetic resistance gaps 10 are arranged on the rotor core 6 corresponding to the two sides of the permanent magnets 7. The rotor shaft 3 is rotatably connected with the front end cover 1 and the heat conducting aluminum piece 4 through bearings. When the motor operates, the magnetic field of the permanent magnet in the permanent magnet rotor forms a closed magnetic circuit with the stator 2 after passing through the outer additional magnetic pole 8 and the inner additional magnetic pole 9 of the permanent magnet rotor, when the motor operates, the magnetic field of the stator 2 always forms a closed magnetic circuit with the magnetic field of the permanent magnet rotor in the same direction through the corresponding additional magnetic poles, and the magnetic field of the stator 2 only has a magnetizing effect on the permanent magnet in the permanent magnet rotor, so that the motor rotor can be ensured not to be demagnetized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. External rotor electric machine of never demagnetization, including front end housing, stator, rotor shaft and permanent magnet rotor, its characterized in that: the front end cover is provided with a heat-conducting aluminum piece, the stator is sleeved on the heat-conducting aluminum piece, the rotor shaft is sleeved in the front end cover and the heat-conducting aluminum piece and is rotationally connected with the front end cover and the heat-conducting aluminum piece, the rotor shaft is provided with a flange plate, and the permanent magnet rotor is arranged on the flange plate and is sleeved outside the stator through the flange plate; the permanent magnet rotor comprises a rotor core and permanent magnets, the permanent magnets are circumferentially arrayed on the rotor core and divide the rotor core into outer additional magnetic poles and inner additional magnetic poles, and magnetic resistance gaps are arranged on the rotor core corresponding to the two sides of the permanent magnets.
2. The external rotor electric machine never demagnetized according to claim 1, wherein: the rotor shaft is rotatably connected with the front end cover and the heat-conducting aluminum piece through a bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120321969.4U CN214479913U (en) | 2021-02-03 | 2021-02-03 | External rotor motor without demagnetization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120321969.4U CN214479913U (en) | 2021-02-03 | 2021-02-03 | External rotor motor without demagnetization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214479913U true CN214479913U (en) | 2021-10-22 |
Family
ID=78118151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120321969.4U Expired - Fee Related CN214479913U (en) | 2021-02-03 | 2021-02-03 | External rotor motor without demagnetization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214479913U (en) |
-
2021
- 2021-02-03 CN CN202120321969.4U patent/CN214479913U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211022 |