CN204696828U - A kind of permanent-magnet ferrite multi-pole magnet-ring of brshless DC motor - Google Patents
A kind of permanent-magnet ferrite multi-pole magnet-ring of brshless DC motor Download PDFInfo
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- CN204696828U CN204696828U CN201520373273.0U CN201520373273U CN204696828U CN 204696828 U CN204696828 U CN 204696828U CN 201520373273 U CN201520373273 U CN 201520373273U CN 204696828 U CN204696828 U CN 204696828U
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Abstract
The utility model discloses a kind of permanent-magnet ferrite multi-pole magnet-ring of brshless DC motor, the magnetic direction that described magnet ring produces forms closed circular along the inner cylinder face of magnet ring, and the direction pairwise coupling of magnetic pole, described magnet ring is made up of anisotropic injection moulding bonded ferrite, in injection mold, be once orientated to magnetic by permanent magnet, the utility model structure is simple, operate steadily, electric efficiency is high.
Description
Technical field
The utility model relates to technical field of motors, is specially a kind of permanent-magnet ferrite multi-pole magnet-ring of brshless DC motor.
Background technology
Existing ceiling fan adopts monophase ac capacitance phase-splitting Induction Motor-Driven mostly, this AC induction motor adopts cage rotor mostly, this rotor is the cage modle winding of cast aluminium after silicon steel plate stacking, rotor loss is large, therefore this electric efficiency is lower, general about 25% to 35%, although adopt brshless DC motor can improve ceiling-fan motor efficiency, but the rotor magnet structure of existing brshless DC motor and the assembly structure between rotor magnet and stator core all can affect the raising of electric efficiency, traditional pressing under magnetic field method, high-power DC power supply equipment must be had to power, stationary magnetic field is produced by electromagnet, multi-pole solennoid is owing to can not adopt pulse current excitation, must lean on coiling very multiturn coil to improve magnetic field intensity, this just makes it bulky, inconvenience is brought to mould and hydraulic press jig Design, heavy electromagnet is to die-filling tool, the operating efficiency impact such as reinforced more so, so, to general magnetic property product, avoid pressing under magnetic field all as far as possible, in addition, the energy resource consumption caused by big current, coil is overheated is also the problem that puzzlement long-time continuous is produced.
Utility model content
The purpose of this utility model is the permanent-magnet ferrite multi-pole magnet-ring providing a kind of brshless DC motor, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme: a kind of permanent-magnet ferrite multi-pole magnet-ring of brshless DC motor, the magnetic direction that described magnet ring produces is formed radially closed circular along magnet ring inner cylinder face, and the direction of magnetic pole and magnet ring form plumbness, described magnet ring is made up of anisotropic injection moulding bonded ferrite.
Preferably, the inner cylinder face along magnet ring on described magnet ring is evenly distributed with multi-magnetic-pole, and adjacent pole is opposite pole.
Preferably, described magnet ring internal diameter is 82mm to 165mm, and magnet ring height is 10mm to 40mm.
Preferably, described magnet ring is provided with installing hole.
Preferably, described injection moulding bonded ferrite is nylon 6 or nylon 12.
Compared with prior art, the beneficial effects of the utility model are: because injection moulding bonded ferrite is that after ferrite particle adds adhesive, high temperature injection is shaping, ensure that magnet ring can be arranged at inner cylinder face with a continuous print torus, overcome the shortcoming that can there is gap when forming magnet ring by the permanent magnet be separated between every block permanent magnet, therefore can realize motor running resistance little, operate steadily, thus improve electric efficiency, because the inner cylinder face of tubular arranges magnet ring, magnet ring is combined into rotor, stator core is placed in magnet ring, the inner cylinder face of magnet ring and the external cylindrical surface of stator core salient pole match, the air gap with higher flux density can be formed, the magnetic direction that magnet ring produces is in the closed circular radial along the face of cylinder, therefore radial magnetic circuit is formed between magnet ring and stator core, then rotor constitutes the external rotor with radial magnetic circuit, brshless DC motor is made to have higher magnetic flux density and larger air-gap diameter, thus Driving Torque is larger, also because magnet ring is using anisotropic injection moulding bonded ferrite as permanent magnetic material, there is higher residual magnetic flux density, coercive force and magnetic energy product, and it is lightweight, therefore family expenses ceiling fan can be realized, the electric efficiency that industrial ceiling fan and decorative hanging fan adopt the brshless DC motor of this magnet ring can reach higher, thus reduce energy consumption, decrease caloric value, also electrical machinery life is extended.
Accompanying drawing explanation
Fig. 1 is multipole permanent magnetism mould schematic diagram;
Fig. 2 is front view of the present utility model;
Fig. 3 of the present utility modelly analyses and observe left view.
In figure: 1 magnet ring, 2 magnetic poles, 3 magnetic directions, 4 installing holes, 5 neodymium iron borons, 6 yokes, 7 external mold sleeves.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1-3, the utility model provides a kind of technical scheme: a kind of permanent-magnet ferrite multi-pole magnet-ring of brshless DC motor, comprise magnet ring 1, inner cylinder face on magnet ring 1 is evenly distributed with magnetic pole 2, the number of poles of magnetic pole 2 is 8 poles, and adjacent pole 2 is N pole, the opposite pole that S pole is alternately arranged, the magnetic direction 3 that magnet ring 1 produces is the sensing S pole formation closed circular along the radial direction of inner cylinder face from N pole as shown by the arrows in Figure 1, magnet ring 1 is evenly distributed with four installing holes 4, for fixed electrical machinery end cap, magnet ring 1 is made up of anisotropic injection moulding bonded ferrite, permanent-magnet ferrite multi-pole magnet-ring is widely used in stepping motor, instrument and meter, transducer, in the new generation products such as timer, particularly multi-pole magnet-ring magneto, in same torque, under the performance index such as power, other motor more similar than it is (as electro-magnetic motor, bonded permanent magnet multisegmented rotor motor) more lamps structure is simple, volume is little, the advantages such as good stability, we are through putting into practice for many years, improve traditional production technology, form a set of uniqueness but very easy multi-pole magnet-ring production technology, properties of product are increased substantially, for the radial 8 pole magnet rings of Φ 23.4 × Φ 11 × 8mm, surface magnetic flux density can reach 80mT even 90mT, rate of finished products is more than 90%, this multi-pole magnet-ring is after forming axle and gear in center injection moulding, as the stepping motor rotor of one, compared with same performance Agglutinate neodymium-iron-boron magnet rotor, cost is less than the latter's 1/3rd, only need one injection step, in manufacturing process, relatively simpler than the latter again, and it is low to there is not the latter's resistivity, easily to get rusty after Long-Time Service and magnetic patch comes off problem, motor use safety, life-span is long, neodymium iron boron magnetic body is replaced with permanent-magnet ferrite multi-pole magnet-ring, can significantly reduce complete machine cost, multi-pole magnet-ring is radial oriented, when this just requires with multipole magnetic field injection mo(u)lding, added also should be radial magnetic field, high-performance Ne-Fe-B magnetic patch (end face magnetic flux density is more than 500mT) is fixed in precision machined Armco iron yoke 6, permanent magnetism sound and yoke 6 faying face gapless, the centripetal end face of magnetic patch accurately must be processed into circular arc (for coordinating with mould sleeve 7), pole polarity alternately complete concentric uniform is arranged in circumferentially, magnetic patch end face and external mold sleeve 7 gap little as far as possible, but must ensure that external mold prodigiosin is freely embedded between magnetic patch, this is to reduce air-gap reluctance in magnetic circuit as far as possible, and can rapidly multipole permanent magnetism fixture be attached to outside external mold sleeve 7 when producing, the centripetal end face edge spacing of magnetic patch should be greater than magnetic patch and external mold sleeve 7 gap, this is to increase air reluctance between alternating polarity magnetic pole angle, reduce the direct magnetic flux of two interpolars, magnetic patch height is generally a little less than external mold sleeve 7, consider the factor such as upper/lower die and injection molding machine, total principle is that the additional radial magnetic patch in Workpiece shaping place is axially being uniformly distributed, avoid magnetic field lower edges effect, make product magnetic property axially also consistent, whole permanent magnetism fixture external diameter is 3 of compacting external mold sleeve 7 external diameter, highly also a little less than outer mold height, lighter and handier, bonded ferrite can adopt nylon 6 or nylon 12, adopt nylon 12 material, the selected combination of materials of above-mentioned magnet ring 1 makes the magnetic property of rotor reach best, magnet ring internal diameter B is 82mm to 165mm, magnet ring height C is 10mm to 40mm, magnet ring internal diameter B is 134.5mm, magnet ring height C is 25mm, above-mentioned rotor draws following technical parameter through ceiling-fan motor testing results, magnetic property: residual magnetic flux density Br is not less than 260mT to 320mT, HCJ Hcj is not less than 2500 to 3500e, maximum magnetic energy product BHmax is not less than 2.0 to 2.2MGOe, as can be seen here, the electric efficiency of this magnet ring is adopted to be greatly enhanced, reduce energy consumption simultaneously.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, scope of the present utility model is by claims and equivalents thereof.
Claims (5)
1. the permanent-magnet ferrite multi-pole magnet-ring of a brshless DC motor, comprise magnet ring (1), it is characterized in that: the magnetic direction (3) that described magnet ring (1) produces is formed radially closed circular along magnet ring (1) inner cylinder face, and the direction of magnetic pole (2) and magnet ring (1) form plumbness, described magnet ring (1) is made up of anisotropic injection moulding bonded ferrite.
2. the permanent-magnet ferrite multi-pole magnet-ring of a kind of brshless DC motor according to claim 1, is characterized in that: described magnet ring (1) is evenly distributed with multi-magnetic-pole (2) along the inner cylinder face of magnet ring (1), and adjacent pole (2) is opposite pole.
3. the permanent-magnet ferrite multi-pole magnet-ring of a kind of brshless DC motor according to claim 1, is characterized in that: described magnet ring internal diameter (B) is 82mm to 165mm, and magnet ring height (C) is 10mm to 40mm.
4. the permanent-magnet ferrite multi-pole magnet-ring of a kind of brshless DC motor according to claim 1, is characterized in that: described magnet ring (1) is provided with installing hole (4).
5. the permanent-magnet ferrite multi-pole magnet-ring of a kind of brshless DC motor according to claim 1, is characterized in that: described injection moulding bonded ferrite is nylon 6 or nylon 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520373273.0U CN204696828U (en) | 2015-06-03 | 2015-06-03 | A kind of permanent-magnet ferrite multi-pole magnet-ring of brshless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520373273.0U CN204696828U (en) | 2015-06-03 | 2015-06-03 | A kind of permanent-magnet ferrite multi-pole magnet-ring of brshless DC motor |
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| Publication Number | Publication Date |
|---|---|
| CN204696828U true CN204696828U (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520373273.0U Expired - Fee Related CN204696828U (en) | 2015-06-03 | 2015-06-03 | A kind of permanent-magnet ferrite multi-pole magnet-ring of brshless DC motor |
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| CN (1) | CN204696828U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106730366A (en) * | 2017-02-15 | 2017-05-31 | 广州穗健医疗科技有限公司 | One kind treats mattress |
| CN108134465A (en) * | 2018-03-06 | 2018-06-08 | 珠海凯邦电机制造有限公司 | Permanent magnet rotor and permanent magnet motor |
| CN108578895A (en) * | 2018-04-25 | 2018-09-28 | 东莞市星显电子科技有限公司 | A kind of Gyromagnetic device |
-
2015
- 2015-06-03 CN CN201520373273.0U patent/CN204696828U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106730366A (en) * | 2017-02-15 | 2017-05-31 | 广州穗健医疗科技有限公司 | One kind treats mattress |
| CN108134465A (en) * | 2018-03-06 | 2018-06-08 | 珠海凯邦电机制造有限公司 | Permanent magnet rotor and permanent magnet motor |
| CN108578895A (en) * | 2018-04-25 | 2018-09-28 | 东莞市星显电子科技有限公司 | A kind of Gyromagnetic device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20170603 |