CN203761157U - Rotor of brushless DC motor - Google Patents
Rotor of brushless DC motor Download PDFInfo
- Publication number
- CN203761157U CN203761157U CN201420027056.1U CN201420027056U CN203761157U CN 203761157 U CN203761157 U CN 203761157U CN 201420027056 U CN201420027056 U CN 201420027056U CN 203761157 U CN203761157 U CN 203761157U
- Authority
- CN
- China
- Prior art keywords
- rotor
- permanent
- motor
- brshless
- magnet steel
- 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
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 238000004804 winding Methods 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 238000003825 pressing Methods 0.000 claims description 18
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 239000007767 bonding agent Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 description 7
- 210000000515 tooth Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses a rotor of a brushless DC motor, which is arranged in the brushless DC motor. The brushless DC motor comprises a motor main shaft, a stator, a coil or a winding, end covers and a shell, wherein the motor main shaft is sleeved with a radial connector. The brushless DC motor is characterized by further comprising a rotor. The rotor firmly fixes a permanent magnet firmly inside a permanent magnetic steel combination piece, thereby reducing wind resistance, reducing power consumption, avoiding falling off of the permanent magnetic steel due to the centrifugal force, and improving safety of the rotor. Disassembly of the permanent magnetic steels in the rotor is convenient.
Description
Technical field
The utility model relates to a kind of motor, particularly relates to a kind of brshless DC motor.
Background technology
Brshless DC motor is a kind of of permanent magnetic synchronous electrical motor, and is not real direct current machine, the English BLDC that is called for short.Be different from brushless motor, brshless DC motor is not used mechanical brushgear, adopts square wave autocontrol permagnetic synchronous motor, with Hall element, replaces carbon brush commutator, using neodymium iron boron as the permanent magnetic material of rotor, in performance, compare general traditional direct current machine and have great advantage.
The stator winding of motor is made three-phase symmetrical star connection more, quite similar with threephase asynchronous.On the rotor of motor, be stained with the permanent magnet having magnetized, in order to detect the polarity of motor rotor, at the in-built position sensor of motor.Driver consists of power electronic device and integrated circuit etc., and its function is: accept motor startup, stop, brake signal, with control motor startup, stop and braking; Accept position sensor signal and rotating signal, be used for controlling the break-make of each power tube of inverter bridge, produce continuous torque; Accept speed command and feedback speed signal, be used for controlling and adjustment rotating speed; Protection and demonstration etc. are provided.
In prior art, a kind of brshless DC motor is disclosed in Chinese invention patent prospectus 201210077133, comprise shell, front end housing, rear end cap, motor shaft, rotor, permanent magnet, stator, described shell front side cutting ferrule front end housing, shell rear side cutting ferrule rear end cap; Socket motor shaft in described shell, fixed stator inside described front end housing, another stator is fixed in described rear end cap inner side, described two stator outsides are provided with a rotor, in described rotor inner wall with the two stators relative permanent magnet that is provided with respectively, its smooth rotation, internal vibration is lower, noise decibel is low, and does not cut sound, birdie frequently.In this patent.Rotor is arranged on the outside of stator, and permanent magnet is arranged on the inwall of this rotor.
In Chinese invention patent prospectus 200810302124, a kind of permanent-magnet brushless DC electric machine is disclosed and for example, by p-m rotor, stator, coil or winding, end cap and casing, formed, described p-m rotor is comprised of the permanent magnet and the rotor rack that are enclosed within rotating shaft, and described permanent magnet adopts multistage permanent magnet to form.This permanent-magnet brushless DC electric machine regulates effective permanent magnetic field intensity by the hop count of adjusting permanent magnet, thereby reaches the object that regulates power of motor; And owing to having adopted multisection type permanent magnet, each section of permanent magnet is just little comparatively speaking, during work, is subject to centrifugal action and is just not easy to damage, the useful life of having improved permanent magnet.But, because permanent magnet is to stick on the outside of rotor rack by adhesive, at rotor, during in high rotating speed, still have the damage that may cause permanent magnet.
On the fixed structure of permanent magnet, LG Electronics Inc. discloses a kind of rotor of brshless DC motor in Chinese invention patent prospectus 200510009113, comprise a framework (being disclosed rotor rack in Chinese utility model patent prospectus 200810302124) being arranged in rotationally on stator inner periphery, be connected at regular intervals diametrically a plurality of rotor tooths on the excircle of framework, and be fixed on a plurality of magnet between rotor tooth, these magnet are arranged to diametrically aspectant side and have identical polarity, wherein, rotor rack, together with rotor tooth is mold with magnet, and in rotor tooth, in outer part, be formed with for preventing the projection of magnet separation, whole rotor tooth is to form by the manufacture of sintering magnetic.This rotor is that rotor and magnet are cast as one, and is difficult for disassembling, assembling and replacing.And motor can produce heat when work, on the operational environment of common permanent magnetism more than 80 degree, can demagnetize, so just make the magnet in rotor that demagnetization phenomenon occurs, change very inconvenient.
In general, brshless DC motor in above-mentioned patent, its epitrochanterian permanent magnet or be bonded in the lateral wall of permanent magnet (permanent-magnet steel sub-assembly) in rotor, or casting is in the inside of rotor, in the situation that the permanent magnet of rotor is bonded in the lateral wall of permanent magnet (permanent-magnet steel sub-assembly), when rotor high-speed rotates, permanent magnet above may come off due to centrifugal force, and, permanent-magnet steel is fitted in to outer wall, can cause windage, add powerful consumption; At the permanent magnet of rotor, cast when permanent magnet (permanent-magnet steel sub-assembly) is inner, can be caused the problem of disassembling, assembling and replacing difficulty.In addition, the installation process of rotor of the prior art is very loaded down with trivial details, permanent-magnet steel need to be processed into the shape adaptive with permanent magnet (permanent-magnet steel sub-assembly), such as, permanent-magnet steel sub-assembly is columned, need by permanent-magnet steel be processed into permanent-magnet steel sub-assembly outer wall match circular-arc, difficulty of processing is large, also can produce leftover pieces, waste raw material, improve cost.
Utility model content
Technical problem to be solved in the utility model is for the above-mentioned state of the art, to provide a kind of thereby the firm internal rotor that is fixed on of permanent magnet to be reduced to power consumption, and the rotor of the brshless DC motor of easy accessibility.
The utility model is to solve the problems of the technologies described above adopted technical scheme to be:
A rotor for brshless DC motor, is arranged in brshless DC motor, and described brshless DC motor includes electric machine main shaft, stator, coil or winding, end cap and casing, is socketed with connector radially on described electric machine main shaft, it is characterized in that:
Also include rotor, described rotor is mainly comprised of permanent-magnet steel assembly and rotor holder, and described rotor holder is fixed on described connector;
Described permanent-magnet steel assembly includes rotating shaft, the permanent-magnet steel of iron core and strip, and described rotating shaft is fixed on rotor holder by bearing, and is axially socketed with iron core in this rotating shaft, offers the punching groove in order to permanent-magnet steel described in plug-in mounting on described iron core.
As preferably, in described rotating shaft, be socketed with columniform iron core.
As improvement, described iron core is laminated into cylindric by annular punching silicon-steel, top and bottom by pressing plate tight, in the middle of described pressing plate with rotating shaft cooperation place by being welded and fixed, and on described pressing plate, offer the opening of punching groove.
Plug-in mounting after permanent-magnet steel, the magnetic field of whole permanent-magnet steel assembly is to extraradial, permanent-magnet steel or two blocks of permanent-magnet steels cannot cover columned iron core certainly completely, therefore, as further improvement, offer at least three punching grooves on described iron core.
Blind area, magnetic field for the space reducing between permanent-magnet steel body produces, as further preferably, offers at least four punching grooves on described iron core.
Although in theory, angle between two blocks of permanent-magnet steels is larger, the scope of the blind area, magnetic field of space radiation place between them is less, but, real work rotor rotates, and in rotation process, magnetic field can be radiated in above-mentioned blind area, therefore in order to reduce costs as much as possible, as concrete technical scheme, described punching groove quantity is 4.
As preferably, on described pressing plate, offer the opening of 4 punching grooves, and the opening of 4 above-mentioned punching grooves is foursquare distribution on pressing plate.
As improvement, described permanent-magnet steel to punching groove, scribbles bonding agent at described permanent-magnet steel and pressing plate joint at plug-in mounting.
Compared with prior art, the utility model has the advantage of: it is permanent-magnet steel to be fixed on to the inside of the permanent-magnet steel assembly of rotor, like this when rotor high-speed rotates, permanent-magnet steel can not be subject to rotating the windage of generation and the effect of centrifugal force, come off, improved the fail safe of rotor, reduced power consumption, in addition, in the utility model, permanent-magnet steel is strip, and processing is got up simple, also can as circular-arc permanent-magnet steel, not produce many leftover pieces, reduced cost, and easy accessibility.
Accompanying drawing explanation
Fig. 1 is the brshless DC motor overall structure schematic diagram of the utility model embodiment;
Fig. 2 is the rotor structure schematic diagram in the utility model embodiment;
Fig. 3 is the schematic diagram of blind area, magnetic field in the utility model embodiment;
Fig. 4 is the fixed position figure of permanent-magnet steel in the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
As depicted in figs. 1 and 2, the present embodiment is a kind of brshless DC motor 1, includes electric machine main shaft 2, stator 3, coil or winding 4, end cap 5 and casing 6, is socketed with connector 2.1 radially on described electric machine main shaft,
It is characterized in that:
Also include rotor 7, described rotor is mainly comprised of permanent-magnet steel assembly 8 and rotor holder 9, and described rotor holder is fixed on described connector 2.1;
Described permanent-magnet steel assembly includes rotating shaft 8.1, the permanent-magnet steel 8.3 of iron core 8.2 and strip, described rotating shaft is fixed on rotor holder 9 by bearing 8.4, and in this rotating shaft, is axially socketed with columned iron core 8.2, offers the punching groove 8.2.1 in order to permanent-magnet steel described in plug-in mounting on described iron core.
Above-mentioned iron core be by annular silicon steel sheet 8.2.4 punching, laminated into cylindric, top and bottom by pressing plate 8.2.2 tight, in the middle of described pressing plate with rotating shaft cooperation place by being welded and fixed, and on described pressing plate, offer the opening 8.2.3 of punching groove.
As shown in Figure 3, plug-in mounting after permanent-magnet steel, the magnetic field of whole permanent-magnet steel assembly is to extraradial, a permanent-magnet steel or two blocks of permanent-magnet steels cannot cover columned iron core certainly completely, therefore, as further improvement, expand radiation area L1, on described iron core, must offer at least three punching grooves.
In order to reduce blind area, the magnetic field L2 of the space generation between permanent-magnet steel body, as further preferred, on described iron core, must offer at least four punching grooves, although but in theory, angle between two blocks of permanent-magnet steels is larger, the scope of the blind area, magnetic field of space radiation place between them is less, yet, at real work rotor, rotate, in rotation process, magnetic field can be radiated in above-mentioned blind area L2, therefore in order to reduce costs as much as possible, as concrete technical scheme, described punching groove 8.2.1 quantity is 4.
As preferably, on described pressing plate, offer the opening of 4 punching grooves, and the opening of 4 above-mentioned punching grooves is foursquare distribution on pressing plate.
As shown in Figure 4, as improvement, described permanent-magnet steel 8.3 to punching groove, scribbles bonding agent at described permanent-magnet steel and pressing plate joint 8.3.1 at plug-in mounting.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (8)
1. a rotor for brshless DC motor, is arranged in brshless DC motor, and described brshless DC motor includes electric machine main shaft, stator, coil or winding, end cap and casing, is socketed with connector radially on described electric machine main shaft,
It is characterized in that:
Also include rotor, described rotor is mainly comprised of permanent-magnet steel assembly and rotor holder, and described rotor holder is fixed on described connector;
Described permanent-magnet steel assembly includes rotating shaft, the permanent-magnet steel of iron core and strip, and described rotating shaft is fixed on rotor holder by bearing, and is axially socketed with iron core in this rotating shaft, offers the punching groove in order to permanent-magnet steel described in plug-in mounting on described iron core.
2. the rotor of brshless DC motor according to claim 1, is characterized in that: in described rotating shaft, be socketed with columniform iron core.
3. the rotor of brshless DC motor according to claim 2, it is characterized in that: described iron core laminates into cylindric by annular punching silicon-steel, top and bottom by pressing plate tight, in the middle of described pressing plate with rotating shaft cooperation place by being welded and fixed, and on described pressing plate, offer the opening of punching groove.
4. the rotor of brshless DC motor according to claim 1, is characterized in that: on described iron core, offer at least three punching grooves.
5. the rotor of brshless DC motor according to claim 4, is characterized in that: on described iron core, offer at least four punching grooves.
6. the rotor of brshless DC motor according to claim 5, is characterized in that: described punching groove quantity is 4.
7. the rotor of brshless DC motor according to claim 3, is characterized in that: on described pressing plate, offer the opening of 4 punching grooves, and the opening of 4 above-mentioned punching grooves is foursquare distribution on pressing plate.
8. according to the rotor of the brshless DC motor described in claim 1 or 3, it is characterized in that: described permanent-magnet steel to punching groove, scribbles bonding agent at described permanent-magnet steel and pressing plate joint at plug-in mounting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420027056.1U CN203761157U (en) | 2014-01-16 | 2014-01-16 | Rotor of brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420027056.1U CN203761157U (en) | 2014-01-16 | 2014-01-16 | Rotor of brushless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203761157U true CN203761157U (en) | 2014-08-06 |
Family
ID=51256393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420027056.1U Expired - Fee Related CN203761157U (en) | 2014-01-16 | 2014-01-16 | Rotor of brushless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203761157U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022587A (en) * | 2014-01-16 | 2014-09-03 | 宁波市比尔迪赛电机有限公司 | Rotor and process for installing rotor to brushless DC motor |
-
2014
- 2014-01-16 CN CN201420027056.1U patent/CN203761157U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022587A (en) * | 2014-01-16 | 2014-09-03 | 宁波市比尔迪赛电机有限公司 | Rotor and process for installing rotor to brushless DC motor |
| CN104022587B (en) * | 2014-01-16 | 2017-08-04 | 宁波市比尔迪赛电机有限公司 | A kind of rotor and the technique being installed to the rotor in brshless DC motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20150116 |
|
| EXPY | Termination of patent right or utility model |