CN202503413U - Brushless direct current motor - Google Patents
Brushless direct current motor Download PDFInfo
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- CN202503413U CN202503413U CN2012201108880U CN201220110888U CN202503413U CN 202503413 U CN202503413 U CN 202503413U CN 2012201108880 U CN2012201108880 U CN 2012201108880U CN 201220110888 U CN201220110888 U CN 201220110888U CN 202503413 U CN202503413 U CN 202503413U
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Abstract
The utility model discloses a brushless direct current motor, comprising a housing, a front end cover, a rear end cover, a motor shaft, a rotor, permanent magnets and stators. The front side of the housing is sleevedly connected to the front end cover and the rear side of the housing is sleevedly connected to the rear end cover; the motor shaft is sleevedly connected into the housing; one stator is fixed at the inner side of the front end cover and the other stator is fixed at the inner side of the rear end cover; the rotor is arranged at the outboard of the two stators; and the permanent magnets are respectively arranged on the inner wall of the rotor and the two stators in an opposite mode. According to the utility model, the brushless direct current motor has the following advantages: the rotation of the motor is smooth; the internal vibration and the noise level are low; and no cutting frequency sound and whistling tone exist.
Description
Technical field
The utility model relates to a kind of technical field of motors, specifically is a kind of brshless DC motor.
Background technology
Direct current machine in the market probably has three kinds: 1. brush through-drive motor is arranged, 2. brushless through-drive motor, the 3. brushless outer driving motor that changes.And above three kinds of motors all have shortcoming separately:
Though brush through-drive motor is arranged with the more cheap ferrite lattice of price, it is to accomplish through the conversion of carbon brush and commutator, and the carbon brush noise is big, the life-span short, the use and the maintenance cost of brush motor are big.
Brushless through-drive motor is because be the internal rotor transmission, and the torsion of its rotor is not enough, needs to guarantee torsion with the very strong material ndfeb magnet of magnetic.And the material price of existing neodymium iron boron is quite expensive on the market, and its magnet cost is high like this.
Brushless outer transmission motor is generally fixed as two ends, and middle unsettled industry is used.If will land uses, need two end axles that increase U-shaped support is locked in stator in the heart.But thisly add U-shaped support mode to unload driving-belt on when new machine is installed with electrical machmary maintenance all pretty troublesome, and might damage motor accidentally during dismounting, so the kind motor scope of application is narrower.
Above-mentioned three direct current machine also has common fatal shortcoming except that each having shortcoming:
No matter magnet cartridge is on the rotor or on the stator, and it must be that N, S plate are adjacent alternately to same direction, and the slit is necessarily arranged in the middle of two adjacent magnet; Use the switching of N, S utmost point magnetic when rotated, have some setbacks when being bound to cause rotation, the problem of card card is arranged; Have the problem of internal vibration, shake when stressed; In order to address these problems, having only under the present circumstances increases the flywheel that balance is used, and increases its inertia force through the weight of flywheel on technological layer; The problem points that has some setbacks and block card when eliminating above-mentioned rotation will increase cost and increase flywheel.
Simultaneously, above-mentioned three direct current machine also has bigger sound, the birdie frequently cut in use, and these sound are to the electric equipment products of indoor use, and it all is fatal particularly requiring the higher facility of quiet degree, product.Also can't solve fully aspect this at present, can only revise the magnet shape of adjacent N, S utmost point interface point as far as possible, the groove number that increases silicon steel sheet waits and remedies, but also can only tut be reduced as far as possible, can not very eliminate above-mentioned noise.
In addition, conventional motors structure in the market is that a rotor and stator are formed, and its silicon steel sheet and structures of copper lines are: copper cash is to move in the groove of silicon steel sheet, and after silicon steel sheet moves into copper cash, will become airtight, an almost seamless entity.And motor is under certain power, and silicon steel sheet has certain-length, in operation process; Because copper cash can generate heat; And and between the air gap of another rotor of matching or magnet on the stator and silicon steel sheet generally all very little because air gap is little, the heat energy on the silicon steel sheet just is difficult to heat radiation so; And silicon steel sheet two end surfaces are because of dispel the heat with the big ratio of air contact area easily; And the heat energy on the silicon steel sheet external diameter near the heat radiation of two end faces also than being easier to, but the middle part is difficult to heat energy is dropped to ideal effect under the limited situation of air gap, in the time can not dropping to ideal effect; Will wasted work because of there being heat energy to have problems, the power of motor is just than normal power decline much lower (power can descend about 15%～20%).
Though problem has the fan blade of adding to solve the cooling problem because of the motor feels hot in the market, when motor during at low-speed running, the air quantity of fan blade will be very low; Heat dissipation problem still can not solve so, and the period is that motor turns round under low speed and motor generates heat the most easily, because the inertia force when not having high speed rotating during low speed is big; And during high speed rotating, because the inertia force of rotation, the power of motor will increase; And when low speed, for the torsion that guarantees to run well will increase, wasted work will increase; Just heating more easily of motor so, and the low speed fan blade is inoperative, motor will burn out because of heating cause easily so.
Though oblique slot type silicon steel sheet or oblique slot type magnet are arranged in the market, the oblique slot type silicon steel sheet is in silicon steel sheet stack and very difficult around copper cash the time, and operating efficiency is very low, and skewed slot magnet is all very difficult when processing and assembling.Moreover, also can't solve fully and cut frequently sound and birdie problem, so the oblique slot type structure is difficult to carry out the production of batch property in the market, so two stators of the utility model have adjustability than the motor of doing stator or rotor with silicon steel sheet on the market.And be overall fixed on the market, be difficult to solve the technological difficulties that above-mentioned motor perplexed.
The utility model content
The purpose of the utility model provides a kind of brshless DC motor, has overcome the above-mentioned deficiency of prior art, its smooth rotation, and internal vibration is lower, and the noise decibel is low, and does not cut sound, birdie frequently.
In order to reach above-mentioned purpose of design, the technical scheme that the utility model adopts is following:
A kind of brshless DC motor comprises shell, front end housing, rear end cap, motor shaft, rotor, permanent magnet, stator, said shell front side cutting ferrule front end housing, shell rear side cutting ferrule rear end cap; Socket motor shaft in the said shell, the inboard fixed stator of said front end housing, inboard fixing another stator of said rear end cap, the said two stators outside is provided with a rotor, is provided with permanent magnet respectively relatively with two stators on the said rotor.
Preferably, said two stators shift to install, and stator dislocation angle is greater than the clearance distance between adjacent two permanent magnets.
Preferably, the inboard locking of said front end housing stator holder, stator holder is enclosed within outside the motor shaft; The solid stator of fixed seating outer wall cover; The inboard locking of said rear end cap stator holder, stator holder is enclosed within outside the motor shaft, solid another stator of fixed seating outer wall cover.
Preferably, said rotor is connected with motor shaft between two stators.
Preferably; Said rotor mainly comprises rotor ring, fixed head; Rotor ring is a loop configuration, rotor ring middle inside welding fixed head, and said two groups of permanent magnets share equally and are connected on the rotor ring inwall; Two groups of permanent magnets are separately positioned on the fixed head both sides, and the arrangement mode of the permanent magnet of fixed head homonymy is: the N utmost point of adjacent permanent magnet and the S utmost point are alternately to same direction.
More preferably; Said fixed head is provided with ventilation hole, and the permanent magnet of ventilation hole and fixed head one side relatively and greater than the area of permanent magnet, the place, axle center of said fixed head is provided with trepanning; Trepanning is fixed on the outer wall of adapter sleeve, and said adapter sleeve and fixed head pass through screw locking.
More preferably, said adapter sleeve middle part is provided with trepanning, trepanning socket motor shaft, and fix through pin, said adapter sleeve both sides are respectively equipped with the jump ring of fixing in the jump ring groove of motor shaft, and the extension of said adapter sleeve is provided with breach.
More preferably, middle side part is provided with the base with supporting role under the said shell; The motor shaft end in the said front end housing outside is provided with step, and the said rear end cap outside is provided with the fan that is socketed on the motor shaft.
More preferably, said front end housing and rear end cap outer be the company's of being provided with ear relatively, and company's ear of front end housing and rear end cap is connected through connecting rod.
More preferably, be respectively equipped with ventilation hole on said front end housing and the rear end cap.
The beneficial effect of the described brshless DC motor of the utility model is: smooth rotation, and the problem of card not during rotation, internal vibration is lower, and the noise decibel is low, does not cut sound, birdie frequently; The scope of application is very wide, particularly environmental noise is required the low facility of decibel.Product is compared with product of the same trade more has advantage, as: indoor electric appliance product, medical equipment, body-building apparatus, blower fan industry, precision machine tool, indoor automatic equipment or the like.
The brshless DC motor of this utility model has solved the limitation that above-mentioned motor uses; All well used aspect any scope and any facility; Also remedy simultaneously through-drive brush motor and through-drive brushless electric machine because of the big problem of the little drive through-drive of internal rotor torque wasted work, also remedied the inconvenient problem of landing of outer rotation brushless electric machine simultaneously.
An external rotor and two brushless electric machines that stator is formed of the utility model; Assemble the effect except that having to land easily; Under the situation of equal volume, this outer rotating motor torsion is bigger more than 30% than through-drive brushless electric machine and through-drive carbon brush motor, and torsion increases; Just efficient increases, and the rate of attacking becomes big.If under same power consumption situation, the power of the utility model brushless electric machine is also big a lot.If under same power situation, the brushless electric machine volume of this patent will be little a lot, because volume is little; Save a lot of raw material virtually, economize on resources, simultaneously to society; Under the same situation of torsion, power, the magnet of the utility model can be used the ferrite of common material, and driven off by shaft brushless electric machine just must be used the Nd-Fe-B material of strong magnetic; And the utility model use magnet material is that ferrite ratio through-drive brushless electric machine epistasis magnet Nd-Fe-B material in the market is cheaply a lot of under the motor of same power; Its cost savings surpass more than 50%, though and the outer commentaries on classics brushless electric machine of existing market has the above-mentioned advantage of our utility model, it can not rotate; Land and use very difficulty, use in enormous quantities so the outer commentaries on classics brushless electric machine that axle can not transmission is difficult on the market.
The utility model is two because of being two stators if following of same power needs the silicon steel sheet of original length is cut one, and middle so comparatively airtight position is few relatively a lot; And former silicon steel sheet side heat radiation position have only about two end faces, and after this stator changed two into, its left and right sides end face had the end face of four sides; Radiating effect promotes a lot like this; Moreover middle airtight relative position lacks few its radiating effect in a lot, so airtight positions than the length of the silicon steel sheet of former monolithic devices might as well; Good heat dissipation will increase radiating effect, and the wasted work rate will be lacked.
Two stators that silicon steel sheet is housed of the utility model are than the stator or the rotor of a whole silicon steel sheet; Radiating effect will improve more than 50%; Because good heat dissipation; Under same power, the brushless electric machine of the utility model will improve more than 10% than other the through-drive formula motor or the efficient of a fixing outer rotating motor.
The motor of the utility model is made up of two stators, during assembling with tooth (armature tooth) dislocation of the silicon steel sheet of two stators a bit, like this; Its dislocation distance is as long as the clearance distance that surpasses between extremely adjacent two of the N, S is just passable, when this coil on one side with N, when S is extremely tangent, on one side coil can rotate not symmetrical with this one side when assembling in addition; Since it is asymmetric; So just can when on one side tangent, also not switch to mutually in addition on one side, can eliminate like this and cut the frequency sound in the operation process; Birdie, the problem that has some setbacks, shakes, blocks card in the time of also can solving rotation simultaneously.
Though we become two stators with a stator design; Just understanding down when rotated still to have and cutting sound frequently; Just a bit than original little sound; But cut sound and the shake that moment stops, the torsionless conversion is brought that are caused when sound, shake frequently are motor rotation switching; But the utility model has solved the problem of sound, shake frequently of cutting fully because when the stator of an end during with magnet N, the switching of the S utmost point, an other end also when stressed rotation has compensated this end in switching the moment of causing stop and the phenomenon of torsionless.And when the other end switched, it is stressed that this end has been crossed switching position so, and the deficiency when also compensating simultaneously other end switching is cut sound, shake frequently so and will be eliminated.And the direct current machine of a stator and a rotor or brushless electric machine just can't be accomplished this point.Because they all are a single integral body, are can't be freely regulated.And because the stator or the rotor of the silicon steel sheet that stacks up are straight troughs; And magnet is because be that N, the S utmost point are alternately towards a direction assembling; Necessarily have the slit or the gap of a switching; Cutting frequently sound, shake, birdie like this can't eliminate, and two stators have just been broken through above-mentioned technological difficulties because can be adjustable.
Description of drawings
Fig. 1 is the stereogram of the described brshless DC motor of the utility model.
Fig. 2 is the front view of the described brshless DC motor of the utility model.
Fig. 3 is the longitudinal sectional view of the described brshless DC motor of the utility model.
Fig. 4 is the cutaway view of the rotor of the described brshless DC motor of the utility model.
Fig. 5 is the sketch map of the permanent magnet of the described brshless DC motor of the utility model.
The sketch map of the motor shaft of the described brshless DC motor of Fig. 6 the utility model, wherein the stage casing part is analysed and observe.
Fig. 7 is the left view of the said motor shaft of Fig. 6.
Fig. 8 is the longitudinal sectional view of the rear end cap of the described brshless DC motor of the utility model.
Among the figure: 1, shell; 2, base; 3, fan; 4, front end housing; 5, rear end cap; 6, connecting rod; 7, connect ear; 8, ventilation hole; 9, louvre; 10, motor shaft; 11, rotor; 11-1, rotor ring; 11-2, fixed head; 11-3, trepanning; 11-4, screwed hole; 11-5, ventilation hole; 12, permanent magnet; 13, stator; 14, pin; 15, screw; 16, step; 17, bearing; 18, adapter sleeve; 19, screwed hole; 20, trepanning; 21, breach; 22, stator holder; 23, screw; 24, jump ring.
Embodiment
Below in conjunction with accompanying drawing the optimum implementation of the utility model is done further detailed description.
Shown in Fig. 1-3 and 8, the described brshless DC motor of the utility model embodiment comprises shell 1, base 2, fan 3, front end housing 4, rear end cap 5, motor shaft 10, rotor 11, permanent magnet 12, stator 13; Said shell 1 is the hollow cylinder body structure, shell 1 front side cutting ferrule front end housing 4, shell 1 rear side cutting ferrule rear end cap 5; Said front end housing 4 and rear end cap 5 outers are the company's of being provided with ear 7 relatively; Company's ear 7 of front end housing 4 and rear end cap 5 is connected through connecting rod 6, through connecting rod 6 front end housing 4 and rear end cap 5 is locked at shell 1 both sides, lands easy to use; Be respectively equipped with ventilation hole 8 on said front end housing 4 and the rear end cap 5, help heat radiation; 1 time middle side part of said shell is provided with the base 2 with supporting role, socket motor shaft 10 in the said shell 1, and motor shaft 10 two ends are socketed in the axle center of front end housing 4 and rear end cap 5 respectively through bearing 17; Motor shaft 10 ends in said front end housing 4 outsides are provided with step 16; Said rear end cap 5 outsides are provided with the fan 3 that is socketed on the motor shaft 10, the said front end housing 4 inboard screw 23 locking stator holders 22 that pass through, and stator holder 22 is enclosed within outside the motor shaft 10; The solid stator 13 of holder 22 cover outer wall covers; The said rear end cap 5 inboard screw 23 locking stator holders 22 that pass through, stator holder 22 is enclosed within outside the motor shaft 10, solid another stator 13 of holder 22 cover outer walls covers; Said two stators 13 outsides are provided with rotor 11; Rotor 11 is connected with motor shaft 10 between two stators 13, drives motor shaft 10 through rotor 11 and rotates, and is provided with permanent magnet 12 respectively relatively with two stators 13 on said rotor 11 inwalls.
Said two stators 13 shift to install, and stator 13 dislocation angles are greater than the clearance distance between adjacent two permanent magnets 12, as this on one side coil and N, when S is tangent; In addition on one side coil can be when assembling rotation not symmetrical on one side with this since asymmetric, when so just can be tangent on one side; Also do not switch to mutually on one side in addition; Can eliminate the sound frequently of cutting in the operation process like this, birdie, the problem that has some setbacks, shakes, blocks card in the time of also can solving rotation simultaneously.
Said brshless DC motor also comprises the dc controlled driver, and it is outside or be locked on the base 2 with the mode of extended line that the dc controlled driver is positioned at shell 1.
In the formed cavity Hall circuit plate is installed between said rear end cap 5 and the stator 13, the Hall support, Hall element, the circuit that two ends stator 13 comes out inserts on the peripheral driver with parallel way.
Shown in Fig. 3-8, said rotor 11 mainly comprises rotor ring 11-1, fixed head 11-2, and rotor ring 11-1 is a loop configuration; Rotor ring 11-1 middle inside welding fixed head 11-2; Said two groups of permanent magnets 12 share equally and are connected on the rotor ring 11-1 inwall, and two groups of permanent magnets 12 are separately positioned on fixed head 11-2 both sides, and the quantity of the permanent magnet 12 of fixed head 11-2 homonymy can be 4,6,8,12; The torsion of the many more motors of permanent magnet 12 quantity is big more; Can be definite according to using watt level, the arrangement mode of the permanent magnet 12 of fixed head 11-2 homonymy is: the N utmost point of adjacent permanent magnet 12 and the S utmost point are alternately to same direction, during use; Permanent magnet 12 can also can be used neodymium iron boron with the more cheap ferrite of material.
Said fixed head 11-2 is provided with ventilation hole 11-5; The permanent magnet 12 of ventilation hole 11-5 and fixed head 11-2 one side is relatively and greater than the area of permanent magnet 12; Being convenient to fixed head 11-2 both sides ventilates, dispels the heat; The place, axle center of said fixed head 11-2 is provided with trepanning 11-3, and trepanning 11-3 is fixed on the outer wall of adapter sleeve 18, and said adapter sleeve 18 is provided with four screwed holes 19; Screwed hole 19 on the adapter sleeve 18 locks on the screwed hole 11-4 on the fixed head 11-2 through screw 15, thereby fixed head 11-2 and rotor ring 11-1 thereof are fixed on the adapter sleeve 18.
Said adapter sleeve 18 middle parts are provided with trepanning 20; Trepanning 20 socket motor shafts 10, and fixing through pin 14, make adapter sleeve 18 and motor shaft 10 rotate synchronously; And can prevent that through pin 14 adapter sleeve 18 and motor shaft 10 from relatively rotating in radial direction; Said adapter sleeve 18 both sides are respectively equipped with the jump ring 24 of fixing in the jump ring groove of motor shaft 10, through jump ring 24 with adapter sleeve 18 in axial fixing, the extension of said adapter sleeve 18 is provided with breach 21; Help fixed head 11-2 both sides through breach 21 and ventilate, be convenient to motor radiating.
This embodiment just is used to explain the preferred embodiment of the utility model, can not limit the utility model.
Claims (10)
1. a brshless DC motor comprises shell, front end housing, rear end cap, motor shaft, rotor, permanent magnet, stator, said shell front side cutting ferrule front end housing, shell rear side cutting ferrule rear end cap; Socket motor shaft in the said shell is characterized in that: the inboard fixed stator of said front end housing, and inboard fixing another stator of said rear end cap, the said two stators outside is provided with a rotor, is provided with permanent magnet respectively relatively with two stators on the said rotor.
2. brshless DC motor according to claim 1 is characterized in that: said two stators shift to install, and stator dislocation angle is greater than the clearance distance between adjacent two permanent magnets.
3. brshless DC motor according to claim 2; It is characterized in that: the inboard locking of said front end housing stator holder; Stator holder is enclosed within outside the motor shaft, the solid stator of fixed seating outer wall cover, the inboard locking of said rear end cap stator holder; Stator holder is enclosed within outside the motor shaft, solid another stator of fixed seating outer wall cover.
4. brshless DC motor according to claim 3 is characterized in that: said rotor is connected with motor shaft between two stators.
5. brshless DC motor according to claim 4; It is characterized in that: said rotor mainly comprises rotor ring, fixed head; Rotor ring is a loop configuration, rotor ring middle inside welding fixed head, and said two groups of permanent magnets share equally and are connected on the rotor ring inwall; Two groups of permanent magnets are separately positioned on the fixed head both sides, and the arrangement mode of the permanent magnet of fixed head homonymy is: the N utmost point of adjacent permanent magnet and the S utmost point are alternately to same direction.
6. according to claim 1 or 2 or 3 or 4 described brshless DC motors; It is characterized in that: said fixed head is provided with ventilation hole; The permanent magnet of ventilation hole and fixed head one side is relatively and greater than the area of permanent magnet; The place, axle center of said fixed head is provided with trepanning, and trepanning is fixed on the outer wall of adapter sleeve, and said adapter sleeve and fixed head pass through screw locking.
7. according to claim 1 or 2 or 3 or 4 described brshless DC motors; It is characterized in that: said adapter sleeve middle part is provided with trepanning; Trepanning socket motor shaft; And fix through pin, said adapter sleeve both sides are respectively equipped with the jump ring of fixing in the jump ring groove of motor shaft, and the extension of said adapter sleeve is provided with breach.
8. according to claim 1 or 2 or 3 or 4 described brshless DC motors, it is characterized in that: middle side part is provided with the base with supporting role under the said shell; The motor shaft end in the said front end housing outside is provided with step, and the said rear end cap outside is provided with the fan that is socketed on the motor shaft.
9. according to claim 1 or 2 or 3 or 4 described brshless DC motors, it is characterized in that: said front end housing and rear end cap outer be the company's of being provided with ear relatively, and company's ear of front end housing and rear end cap is connected through connecting rod.
10. according to claim 1 or 2 or 3 or 4 described brshless DC motors, it is characterized in that: be respectively equipped with ventilation hole on said front end housing and the rear end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201108880U CN202503413U (en) | 2011-10-27 | 2012-03-21 | Brushless direct current motor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120415735.2 | 2011-10-27 | ||
| CN201120415735 | 2011-10-27 | ||
| CN2012201108880U CN202503413U (en) | 2011-10-27 | 2012-03-21 | Brushless direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202503413U true CN202503413U (en) | 2012-10-24 |
Family
ID=47040012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201108880U Expired - Lifetime CN202503413U (en) | 2011-10-27 | 2012-03-21 | Brushless direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202503413U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095077A (en) * | 2011-10-27 | 2013-05-08 | 东莞市万瑞电机有限公司 | Brushless direct current motor |
| CN104242497A (en) * | 2014-08-01 | 2014-12-24 | 广东美芝制冷设备有限公司 | Compressor |
-
2012
- 2012-03-21 CN CN2012201108880U patent/CN202503413U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103095077A (en) * | 2011-10-27 | 2013-05-08 | 东莞市万瑞电机有限公司 | Brushless direct current motor |
| CN103095077B (en) * | 2011-10-27 | 2016-08-24 | 广东万瑞机电科技有限公司 | Brshless DC motor |
| CN104242497A (en) * | 2014-08-01 | 2014-12-24 | 广东美芝制冷设备有限公司 | Compressor |
| CN104242497B (en) * | 2014-08-01 | 2017-05-31 | 广东美芝制冷设备有限公司 | Compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 523000 Guangdong city of Dongguan province Dalang Zhen fo Zi Ao Cun Fumin Industrial Park No. 10 Patentee after: Guangdong Wanrui Electromechanical Technology Co., Ltd. Address before: 523797 Guangdong city of Dongguan province Dalang Zhen fo Zi Ao Cun Fu Zi Fumin Industrial Zone No. 10 concave area Patentee before: Dongguan Wanrui Motor Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20121024 |
|
| CX01 | Expiry of patent term |