CN201057630Y - Low-fluctuating permanent magnet brushless motor with structure of different width - Google Patents
Low-fluctuating permanent magnet brushless motor with structure of different width Download PDFInfo
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- CN201057630Y CN201057630Y CNU2007200707003U CN200720070700U CN201057630Y CN 201057630 Y CN201057630 Y CN 201057630Y CN U2007200707003 U CNU2007200707003 U CN U2007200707003U CN 200720070700 U CN200720070700 U CN 200720070700U CN 201057630 Y CN201057630 Y CN 201057630Y
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Abstract
A low-fluctuation permanent magnet brushless motor with unequivalent width structure is provided, which relates to the motor technology field, and is mainly for solving the technology problem, such as lowering the torque fluctuation, improving start-up torque and rapid response and perfecting servo characteristics. The permanent magnet brushless motor comprises a stator part and a rotor part, the stator part is provided with a stator iron core and a stator winding, the rotor part is provided with a main shaft and a rotor iron core sleeved on the main shaft, the iron core is fixed with a magnetic steel. The utility model is characterized in that: teeth and grooves of the iron are unequivalent structures; the space between the magnetic pole of the permanent magnetic rotor and adjacent magnetic poles are unequivalent structures, namely the magnetic pole width of the rotor iron core is more than or less than the width between adjacent magnetic poles, or the space between magnetic poles of the rotor iron core is more than or less than the space between adjacent magnetic poles. The utility model enables the motor with the advantages of high output power, small torque fluctuation, rapid dynamic response, high reliability, long service life, high efficiency, low magnetic circuit loss, small heat generating, low noise, small volume and light weight.
Description
Technical field
The utility model relates to motor technology, particularly relates to a kind of (magnetic pole) not low-fluctuation permanent magnetic brushless motor technology of wide structure.
Background technology
Electromechanical integration and automation occasion more and more require energy-conservationization, low noiseization, intellectuality, to being its supporting motor proposition high efficiency, low noise, high output, adjustable speed and intelligentized requirement.Fig. 3 is the cross-section structure of conventional surface-mounted permanent magnetic brushless in the prior art, comprises stator yoke 31, stator tooth 32, stator slot 33, rotor magnetic steel (magnetic pole) 36, rotor yoke 37 and armature spindle 38; Fig. 4 is the structure of conventional built-in type permanent-magnet brushless electric machine in the prior art, comprises stator yoke 41, stator tooth 42, stator slot 43, rotor magnetic steel (magnetic pole) 46, rotor yoke 47, armature spindle 48, pole shoe 49.Brushless electric machine is compared and is had many good qualities with brush is arranged, but the armature excitation of brushless electric machine be the rotating magnetic field of " non-circular great-jump-forward ", and torque ripple was just bigger originally, added slot effect, had bigger torque ripple; In addition, oneself more and more widely is applied to high-grade field of household appliances present single-phase permanent brushless motor, and its stator core teeth groove evenly distributes usually, has the defective of starting difficulty, influences the steady low noise operation of electronic product.
The cogging torque of brushless electric machine claims that also reluctance torque is a critical defect in the governing system of automation occasion, electromechanical integration occasion in addition.Countries in the world electromechanics trade and R﹠D institution are all being studied, try hard to reduce the motor torque fluctuation, as adopt mark channel process, auxiliary channel process, auxiliary tooth method, skewed slot method, oblique utmost point method, the channel process of remaining silent and magnetization slot wedge method etc., cut both ways, but always be difficult to effectively eliminate slot effect.The skewed slot or the oblique utmost point also can reduce torque ripple, but the oblique utmost point method of skewed slot is influential to square wave motor gas-gap magnetic flux density flat-top width, and skewed stator slot can influence the groove area that accounts for of conductor simultaneously, and copper loss is increased, both all reduce and exert oneself, and are the complex structures that makes motor.Fluctuation requires very strict the high accuracy governing system to cogging torque, because in governing system, when the frequency of motor torque was consistent with the mechanical resonance frequency of stator or rotor, vibration and noise that cogging torque produces were significantly enlarged, and also influenced low-speed performance and positioning accuracy simultaneously.
The utility model content
At the defective that exists in the above-mentioned prior art, the low-fluctuation permanent magnetic brushless motor of the not wide structure of characteristics such as technical problem to be solved in the utility model provides a kind ofly makes that motor can have high output, torque ripple is little, dynamic response is faster, reliability is high, the life-span is long, power weight is big, efficient is high, the magnetic circuit loss is low, heating is little, low noise, miniaturization and and even running.
In order to solve the problems of the technologies described above, the low-fluctuation permanent magnetic brushless motor of a kind of not wide structure provided by the utility model comprises stator and rotor portion, and stationary part is provided with stator core and stator winding; Rotor portion is provided with on main shaft and the main shaft and is with rotor core, be fixed with magnet steel (magnetic pole) on the iron core, it is characterized in that, the tooth of described stator core, groove are not wide structure, and promptly the facewidth of stator tooth is greater than (or less than) facewidth of adjacent teeth or the groove width of the stator slot groove width greater than (or less than) adjacent slot; The magnetic pole of described p-m rotor or the spacing between adjacent pole are not wide structure, and promptly the magnet pole widths of rotor core is greater than the width of (or less than) adjacent pole, and perhaps the spacing between the rotor core magnetic pole is greater than the spacing between (or less than) adjacent pole.
Further, the tooth inner surface of described stator core is eccentric (asymmetric).
Further, the magnetic pole of described rotor core is that spacing between wide magnetic pole, magnetic pole equates.
Further, described stator core has the groove silicon steel plate stacking to form for tooth is arranged.
Further, be provided with radial air gap between described p-m rotor and the described stator.
Further, described stator core circumference teeth groove is uniform.
Utilize the low-fluctuation permanent magnetic brushless motor of the not wide structure that the utility model provides, because the tooth of stator core, (radially) magnetic pole of groove or rotor core adopts not wide structure, thereby inhibition slot effect, improving air-gap field distributes, effectively reduce torque ripple, improve electric motor starting torque and response fast, improve servo characteristic, make the quiet operation of motor energy, given full play to the overall merit of brushless electric machine, made motor have high output, torque ripple is little, dynamic response is faster, the reliability height, life-span is long, power weight is big, the efficient height, the magnetic circuit loss is low, it is little to generate heat, low noise, characteristics such as miniaturization and and even running.By adopting above-mentioned measure, the permanent magnet brushless electromotor quality is increased substantially.
Compare in addition in Figure 11 permanent magnetic brushless torque ripple curve, the torque ripple of magnetic pole circumference uniform distribution (distance between two poles equates) curve s and magnetic pole circumference not uniform (distance between two poles is unequal) curve k, T (Nm) is cogging torque (Newton meter); As shown in Figure 11: the torque ripple of magnetic pole circumference not uniform (distance between two poles is unequal) k is starkly lower than magnetic pole circumference uniform distribution (distance between two poles equates) s, improved the air-gap field distribution, effectively reduce torque ripple, improve electric motor starting torque and response fast, improve servo characteristic.
Description of drawings
Fig. 1 is the not wide structure low-fluctuation permanent magnetic brushless of a utility model embodiment motor assembly cross-sectional view;
Fig. 2 is a low-fluctuation permanent magnetic brushless rotor modular construction schematic diagram;
Fig. 3 is conventional surface-mounted permanent magnetic brushless structural representation;
Fig. 4 is conventional built-in type permanent-magnet brushless motor structure schematic diagram;
Fig. 5 is the not wide structural representation of stator tooth among the utility model embodiment;
Fig. 6 is the not wide structure permanent magnetic brushless of a band stator tooth schematic diagram among the utility model embodiment;
Fig. 7 is the eccentric tooth single-phase permanent brushless of a band stator electric machine structure schematic diagram among the utility model embodiment;
Fig. 8 n is the not wide field structure schematic diagram of the utility model embodiment permanent magnetic brushless;
Fig. 8 m is the corresponding magnetic flux density β distribution schematic diagram of not wide magnetic pole of the not wide magnetic pole permanent magnetic brushless of band among the utility model embodiment;
Fig. 9 is that the band distance between two poles does not wait the permanent magnetic brushless structural representation among the utility model embodiment;
Figure 10 is that permanent magnetic brushless is adjusted the distance between two poles schematic diagram among the utility model embodiment;
Figure 11 is a permanent magnetic brushless torque ripple curve synoptic diagram.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection range of the present utility model in.
The utility model is started with from improving the permanent magnetic brushless new way, solves that the automation occasion is big with the motor torque ripple, noise is big, starting torque is little, efficient is low and disadvantage such as low-response.Permanent magnetism---rotor does not have magnet exciting coil, and is energy-efficient; Brushless---brushless, absence of commutator, no-spark, power-weight ratio height.Not wide structure---suppress slot effect, effectively reduce torque ripple, improve electric system and respond fast and improve servo characteristic, motor is had operate steadily, characteristics such as noise is low, reliable operation.
Referring to shown in Figure 1, the utility model embodiment not low-fluctuation permanent magnetic brushless motor assembly cross-section structure of wide structure comprises armature spindle packing ring 1, bearing wave washer 2, magnet steel insulation spacer 3, drift bolt 4, front end housing 5, stator module 6, rotor assembly 7, control board support 8, control board 9, screw 10, rear end cap 11, outlet wire harness 12, be provided with stator module 6 in the stator cage of not wide structure low-fluctuation permanent magnetic brushless motor, be provided with air gap between stator module 6 and the rotor assembly 7.Fig. 2 is a low-fluctuation permanent magnetic brushless rotor assembly, comprises armature spindle 21, bearing 22, magnet steel (magnetic pole) 23, follows the tracks of p-m rotor 24, bearing 25.
The utility model critical component is respectively described below:
As Fig. 5, shown in Figure 6, the not wide structure of stator tooth in the embodiment low-fluctuation permanent magnetic brushless motor of the utility model Fig. 1 permanent magnetic brushless: comprise stator yoke 61, the narrow tooth 62 of stator, stator slot 63, the wide tooth 64 of stator, stator coil (winding) 65, rotor magnetic steel (magnetic pole) 66; Because stator tooth is not wide structure in the stator core, not that stator tooth evenly distributes in the conventional permanent magnetic brushless structure, the facewidth of the narrow tooth 62 of stator is less than the facewidth (being the facewidth of the facewidth of the wide tooth 64 of stator greater than the narrow tooth 62 of adjacent stator) of the wide tooth 64 of adjacent stator, the wide tooth 64 mixed and alternate arrangements of narrow tooth 62 of stator and stator, reduced the variation of air-gap permeance, thereby reduced the variation of air-gap field energy storage when rotor rotates, weaken reluctance torque, suppressed the torque ripple that teeth groove causes.A, B, C represent adjacent stator coil (winding) among Fig. 6.
As shown in Figure 7, the eccentric tooth single-phase permanent brushless of band stator electric machine structure among another embodiment of the utility model Fig. 1 permanent magnetic brushless: comprise stator yoke 61 ', the eccentric tooth 62 ' of stator, stator slot 63 ', rotor magnetic steel (magnetic pole) 66 ', rotor yoke 67 ', armature spindle 68 '; Stator iron core tooth inner surface (being the surface of stator internal ring gear) asymmetric (off-centre), the structure of the eccentric tooth 62 ' of stator has improved the electric motor starting torque, overcome the defective of single-phase permanent brushless electric motor starting difficulty, improve motor and exert oneself, respond fast and improve servo characteristic.
Shown in Fig. 8 n, Fig. 8 m, the corresponding magnetic flux density β of not wide magnetic pole permanent magnetic brushless structure of band and not wide magnetic pole distributes among the embodiment of the utility model Fig. 1 permanent magnetic brushless: comprise narrow magnetic pole 76, rotor yoke 77, wide magnetic pole 75, armature spindle 78; Narrow magnetic pole launches 76d and corresponding magnetic flux density B distribution 76e, and wide magnetic pole launches 75d and corresponding magnetic flux density B distribution 75e.Be enclosed within the p-m rotor and be fixed with not wide magnetic pole of diametrical magnetization magnet steel (magnetic pole) and the corresponding magnetic flux density B distribution of not wide magnetic pole that magnet pole widths does not wait on the rotor core circumference on the armature spindle 78.Because the torque that magnetic pole strength produces is separate, selects suitable magnet pole widths, can effectively eliminate the sinusoidal fundamental wave composition of cogging torque.By magnetic pole and corresponding magnetic flux density B distribution map as can be known: magnet pole widths is narrow more, and corresponding magnetic flux density amplitude is low more, otherwise magnet pole widths is wide more, and corresponding magnetic flux density amplitude is high more.The CAD reasonable disposition of narrow magnetic pole 76 and wide magnetic pole 75, optimum organization, reduce air-gap permeance and air gap magnetic resistance change rate, be equivalent to skewed slot and tiltedly magnetic pole effect, improving air-gap field distributes, effectively reduce torque ripple and noise, structure, technology are simple, satisfy in the high accuracy servo system strict demand to motor.
The air-gap field energy storage is relevant with rotor-position.Do not wait permanent magnetic brushless structure and Figure 10 permanent magnetic brushless to adjust distance between two poles figure according to Fig. 9 band distance between two poles, comprise stator yoke 91, stator tooth 92, stator slot 93, rotor magnetic steel (magnetic pole) 76 ', distance between two poles 70 ', rotor yoke 77 ', armature spindle 78 ' among Fig. 9; Comprise rotor magnetic steel (magnetic pole) 76 among Figure 10 ", rotor yoke 77 ", magnetic pole angle of displacement θ for the first time
1With the magnetic pole angle of displacement θ second time
2The setting of p-m rotor iron core circumferencial direction magnetic pole is not uniform, be that spacing does not wait between adjacent pole, by CAD distance between two poles 70 ' is carried out the best adjustment, also be similar to the effect of establishing non-uniform gap between skewed slot, oblique magnetic pole and the rotor, improve air-gap field and distribute, effectively reduce torque ripple, make the quiet operation of motor, give full play to the brushless electric machine overall merit, made motor have characteristics such as low fluctuation, fast-response, low noise and even running, realized miniaturization and.
Claims (4)
1. the low-fluctuation permanent magnetic brushless motor of wide structure not comprises stator and rotor portion, and stationary part is provided with stator core and stator winding; Rotor portion is provided with on main shaft and the main shaft and is with rotor core, is fixed with magnet steel on the iron core, it is characterized in that, the groove width that the facewidth of described stator tooth is greater than or less than the facewidth of adjacent teeth or described stator slot is greater than or less than the groove width of adjacent slot; Perhaps the magnet pole widths of described rotor core is greater than or less than the width of adjacent pole or the spacing between described rotor core magnetic pole and is greater than or less than spacing between adjacent pole.
2. the low-fluctuation permanent magnetic brushless motor of not wide structure according to claim 1 is characterized in that, the tooth inner surface of described stator core is eccentric.
3. the low-fluctuation permanent magnetic brushless motor of not wide structure according to claim 1 is characterized in that, the magnetic pole of described rotor core is that the spacing between wide magnetic pole, magnetic pole equates.
4. the low-fluctuation permanent magnetic brushless motor of not wide structure according to claim 1 is characterized in that, described stator core circumference teeth groove is uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200707003U CN201057630Y (en) | 2007-06-06 | 2007-06-06 | Low-fluctuating permanent magnet brushless motor with structure of different width |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200707003U CN201057630Y (en) | 2007-06-06 | 2007-06-06 | Low-fluctuating permanent magnet brushless motor with structure of different width |
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| CN201057630Y true CN201057630Y (en) | 2008-05-07 |
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| CNU2007200707003U Expired - Lifetime CN201057630Y (en) | 2007-06-06 | 2007-06-06 | Low-fluctuating permanent magnet brushless motor with structure of different width |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741157A (en) * | 2008-11-21 | 2010-06-16 | 德昌电机(深圳)有限公司 | motor and rotor thereof |
| CN102130559A (en) * | 2011-03-18 | 2011-07-20 | 江苏大学 | Five-phase permanent magnet fault-tolerant motor with magnetic congregating effect for electric vehicle |
| CN102629811A (en) * | 2012-03-05 | 2012-08-08 | 浙江亿利达风机股份有限公司 | Brushless direct current motor |
| CN102906965A (en) * | 2010-02-05 | 2013-01-30 | 西门子公司 | Stator of a permanently excited rotating electric machine |
| CN103545946A (en) * | 2013-11-15 | 2014-01-29 | 哈尔滨工业大学 | Reluctance motor of single-phase three-tooth structure |
| CN104539073A (en) * | 2014-12-25 | 2015-04-22 | 华中科技大学 | Direct-driving type torque motor |
| CN104617688A (en) * | 2015-01-30 | 2015-05-13 | 广东威灵电机制造有限公司 | Motor and motor stator |
| CN108233565A (en) * | 2018-03-29 | 2018-06-29 | 广东美芝制冷设备有限公司 | Motor, compressor and refrigeration equipment |
| CN109245353A (en) * | 2018-11-26 | 2019-01-18 | 史政齐 | The short magnetic circuit of electric car is without rare-earth permanent-magnet electric machine |
| CN109462296A (en) * | 2018-11-26 | 2019-03-12 | 史政齐 | Automobile electrical excitation and the double state motors of switching magnetic-resistance |
| CN110350685A (en) * | 2018-04-06 | 2019-10-18 | 马渊马达株式会社 | Motor |
| CN112600321A (en) * | 2020-12-01 | 2021-04-02 | 利欧集团浙江泵业有限公司 | Stator and rotor structure of permanent magnet control motor with positioning induction function |
| CN112822798A (en) * | 2020-12-31 | 2021-05-18 | 博宇（天津）半导体材料有限公司 | Vertical ceramic heater |
-
2007
- 2007-06-06 CN CNU2007200707003U patent/CN201057630Y/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741157A (en) * | 2008-11-21 | 2010-06-16 | 德昌电机(深圳)有限公司 | motor and rotor thereof |
| CN102906965A (en) * | 2010-02-05 | 2013-01-30 | 西门子公司 | Stator of a permanently excited rotating electric machine |
| CN102130559A (en) * | 2011-03-18 | 2011-07-20 | 江苏大学 | Five-phase permanent magnet fault-tolerant motor with magnetic congregating effect for electric vehicle |
| CN102629811A (en) * | 2012-03-05 | 2012-08-08 | 浙江亿利达风机股份有限公司 | Brushless direct current motor |
| CN103545946A (en) * | 2013-11-15 | 2014-01-29 | 哈尔滨工业大学 | Reluctance motor of single-phase three-tooth structure |
| CN104539073A (en) * | 2014-12-25 | 2015-04-22 | 华中科技大学 | Direct-driving type torque motor |
| CN104617688A (en) * | 2015-01-30 | 2015-05-13 | 广东威灵电机制造有限公司 | Motor and motor stator |
| CN104617688B (en) * | 2015-01-30 | 2018-09-11 | 广东威灵电机制造有限公司 | motor and its stator |
| CN108233565A (en) * | 2018-03-29 | 2018-06-29 | 广东美芝制冷设备有限公司 | Motor, compressor and refrigeration equipment |
| CN110350685A (en) * | 2018-04-06 | 2019-10-18 | 马渊马达株式会社 | Motor |
| CN109245353A (en) * | 2018-11-26 | 2019-01-18 | 史政齐 | The short magnetic circuit of electric car is without rare-earth permanent-magnet electric machine |
| CN109462296A (en) * | 2018-11-26 | 2019-03-12 | 史政齐 | Automobile electrical excitation and the double state motors of switching magnetic-resistance |
| CN109462296B (en) * | 2018-11-26 | 2021-01-29 | 南通巨升非晶科技股份有限公司 | Electric excitation and switch reluctance dual-state motor for automobile |
| CN112600321A (en) * | 2020-12-01 | 2021-04-02 | 利欧集团浙江泵业有限公司 | Stator and rotor structure of permanent magnet control motor with positioning induction function |
| CN112822798A (en) * | 2020-12-31 | 2021-05-18 | 博宇（天津）半导体材料有限公司 | Vertical ceramic heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI CHUANYE ELECTRIC MACHINERY CO., LTD. NING Free format text: FORMER OWNER: LIN DEFANG |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201315 NO.303, KANGLIU ROAD, KANGQIAO INDUSTRIAL ZONE, PUDONG NEW DISTRICT, SHANGHAI CITY TO: 201315 NO.2502, HUNAN ROAD, KANGQIAO INDUSTRIAL PARK, KANGQIAO TOWN, PUDONG NEW DISTRICT, SHANGHAI CITY, CHINA |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100329 Address after: 201315, No. 2502, Shanghai South Road, Cambridge Industrial Park, Cambridge Town, Shanghai, Pudong New Area, China Patentee after: Shanghai Top Motor Co., Ltd. Patentee after: Shanghai Chuanye Electric Motor Co., Ltd. Patentee after: Ningbo Tebo Motor Co., Ltd. Address before: 201315 No. 303 Kang Liu Road, Cambridge Industrial Zone, Shanghai, Pudong New Area Patentee before: Shanghai Top Motor Co., Ltd. Patentee before: Lin Defang |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080507 |
|
| CX01 | Expiry of patent term |