CN2847670Y - External rotary DC brushless motor and fan with inner radial matching circular magnet - Google Patents
External rotary DC brushless motor and fan with inner radial matching circular magnet Download PDFInfo
- Publication number
- CN2847670Y CN2847670Y CN 200520129036 CN200520129036U CN2847670Y CN 2847670 Y CN2847670 Y CN 2847670Y CN 200520129036 CN200520129036 CN 200520129036 CN 200520129036 U CN200520129036 U CN 200520129036U CN 2847670 Y CN2847670 Y CN 2847670Y
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Abstract
The utility model relates to an external rotary DC brushless motor and a fan with an inner radial matching circular magnet. The body of the utility model is composed of a base, a stator, an external rotor which surround the circumference of the stator, wherein the external rotor is composed of a rotating disk and a multipole anisotropic inner radial matching circular ferrite magnet which is fixed to the inner circumference of the rotating disk and the magnet comprises a magnetic conductive outer layer which does not have magnetic properties and a magnetic inner layer which has magnetic properties, ensuring that magnetic force lines of the magnetic inner layer turn back after the magnetic force lines of the magnetic inner layer pass the magnetic conductive outer layer in order to improve magnetic energy product. When power is introduced into the stator, a magnetic pole interactive change is generated, the outer rotor can be driven to rotate to output power. The utility model can enhance work efficiency when the utility model is applied to motors and fans.
Description
Technical field
The utility model is to be a kind of outward rotation type DC Brushless Motor and fan, particularly by the external rotor with internal diameter orientation ring-type iron oxygen magnet, can reach the effect that increases magnetic force, improves magnetic energy product, and then improves the efficient of DC Brushless Motor and fan.
Background technology
According to EPRI-Electric Power Research Institute (EPRI) assessment, the consumption of electric energy in recent years accounted for whole energy-output ratios percentage 40, and electric energy is supplied with the ratio that electric equipment uses and is also significantly improved along with the lifting of inhabitation quality.
When having estimated 2010, will have 80 electric energy of percentage to supply with electric equipment and use, wherein, the power consumption of motor more accounted for whole electric energy percentage 55, therefore develop high-reliability and high performance motor, become the necessary means that promotes the national industry competitiveness.
In various motor, because DC Brushless Motor adopts electronics commutation structure, motor speed can reach more than per minute 10,000 revolutions, the velocity interval that it is broad, low rotor inertia, low electromagnetic interference is exempted from the carbon brush maintenance, non-carbonate dust, all being the advantage of DC Brushless Motor uniqueness, also is to use in high-accuracy control field now such as CNC toolroom machine, the essential motor of semi-conductor processing equipment.
Remove this, the reason by control technology is advanced by leaps and bounds and the special-purpose control IC of brushless motor is popularized now brings up brushless motor and gets the mastery on price, and some traditional usabilities answer the field of motor applications also to be replaced by DC Brushless Motor gradually.For example the dust free room fan motor that uses of chemical industry, family expenses or building, air conditioner fan motor, ceiling fan motor, compressor motor, washing machine adopting direct drive motor, and radiator fan motor of building constant pressure pump motor, consumption electronic products (as projector, computer fan) or the like, obvious brushless motor and fan must have leadership in the future in these industries.
Only, present outward rotation type DC Brushless Motor and the employed outer rotor magnet of fan, mostly adopt neodymium iron boron (NdFeB) series, its material is that the nylon (nylon) with 94% neodymium iron boron and 6% mixes, and after making ring bodies with Jet forming machine, at ring-like body internal diameter 28 utmost points that magnetize, has the ring magnet of 28 utmost points with formation.The magnetic force property of its material no doubt is enough to satisfy required, but its shortcoming is a material cost higher (neodymium Nd is the less rare metal of output) and processing procedure difficulty, so its finished product is quite expensive.
Therefore, with regard to being arranged, manufacturer replaces aforesaid neodymium iron boron series magnet, to reduce cost with the magnet of Ferrite/anisotropy/wet type punch forming mode.This outer rotor magnet is because of the problem of process technique, only can make half-moon-shaped anisotropy iron oxygen magnet after, half-moon-shaped group of magnets that again will be more than at least 3 is upright circlewise.This upright permanent magnet that circularizes of half-moon-shaped anisotropy iron oxygen group of magnets that utilizes has following significant drawback on performance;
1. group forms air gap and easy leakage field between magnet and the magnet immediately, and the situation that has a torque (cogging) when making the annular permanent magnnet running takes place.
2. made up by several pieces half-moon-shaped disks owing to annular permanent magnnet, thus on the processing group is upright, comparatively take a lot of work, and also inner out of roundness is relatively poor.
3. the magnet surface flux density of neodymium iron boron ejection formation is 2100～2300Gauss, and the magnet that Ferrite is made only has 1650～1950Gauss, and it is not enough that magnetic force is disliked slightly.
4. the Ferrite sintering temperature is about about 1240 ℃, and magnet thickness can not be too thin during sintering, otherwise cracked easily, and the external diameter when therefore causing the upright magnet circlewise of group is bigger, also makes the enclosure volume of whole motor and fan huge.
Since variety of problems such as above-mentioned leakage field, torque, magnetic force deficiency, external diameter be bigger use the half-moon-shaped anisotropy iron of this kind oxygen magnet to organize at present and found the annular permanent magnnet that forms, still can't obtain standard to be authenticated; With regard to the surcharge of commodity, more competitiveless.
In addition, no matter be neodymium iron boron composite wood or half-moon-shaped sheet Ferrite, use is when the outward rotation type DC Brushless Motor, its magnetic line of force all need be through constituting a magnetic loop with the inner face stator behind the iron rotating disk of ringshaped magnet periphery and the air again, so the loss of the magnetic line of force is very big, and the usefulness of motor and fan is reduced.
Utilizing the upright ringshaped magnet of semilune Ferrite group in fact, is not to be good for nothing except price advantage.Its physical characteristic is just come goodly than the magnet with neodymium iron boron series; For the industry that temperature range, moisture-proof, anti acid alkali performance are had relatively high expectations, be still splendid material and select.Add the regenerant (mill-Scale) that the Ferrite material mainly comes from pickled plate and produced and make, more can meet the trend of environmental protection.
Moreover single with regard to magnetic force property as previously mentioned, the material of Ferrite is if the magnetic force property of neodymium iron boron series material is not good.Therefore, if can improve with regard to doing one on the structure of ring-type iron oxygen magnet, with as outward rotation type DC Brushless Motor and the employed outer rotor magnet of fan, leakage field be can reduce again, surperficial flux density and magnetic field intensity improved, simultaneously can also the upright operation of saving group, make Ferrite can bring into play its magnetic force property to ultimate attainment, can replace the magnet of less, the expensive neodymium iron boron series of output fully, and outward rotation type DC Brushless Motor and fan are brought revolutionary impact, promote the progress of industry; This also is that the Zhao Yin of this structure is founded in this case creator research and development.
The utility model content
The purpose of this utility model is, be divided into by internal diameter orientation ring-type iron oxygen magnet and do not have a magnetic internal layer that the magnetic conduction of magnetic is outer and have magnetic, the magnetic line of force of the magnetic internal layer magnetic conduction skin of passing through is promptly turned back, to shorten magnetic loop and to increase magnetic force, raising magnetic energy product, when being used in motor and fan, can increase work efficiency.
In specific words, a kind of outward rotation type DC Brushless Motor with internal diameter orientation ringshaped magnet of the utility model is to be provided with in motor case, it is characterized in that, comprising:
One pedestal is fixed in motor case inside, has a rotatable rotating shaft, and this rotating shaft passes the shell of motor;
One stator is fixed in the outer rim of rotating shaft on the pedestal, further includes one group of yoke and induction coil;
One external rotor, further formed in the internal diameter orientation ring-type iron oxygen magnet that the rotating disk and of rotating shaft is fixed in the rotating disk inner peripheral by a center fixation, this internal diameter orientation ring-type iron oxygen magnet is multipole anisotropy permanent magnet, its structure outer rim is not have a magnetic conduction skin of magnetic, inner edge is the magnetic internal layer with magnetic, and is looped around around the stator.
A kind of outward rotation type fan with internal diameter orientation ringshaped magnet of the utility model is characterized in that, is to comprise:
One pedestal for stator and the external rotor group position of halting, has a rotatable rotating shaft;
One stator is fixed in the outer rim of rotating shaft on the pedestal, further includes one group of yoke and induction coil;
One external rotor, further formed in the internal diameter orientation ring-type iron oxygen magnet that the rotating disk and of rotating shaft is fixed in the rotating disk inner peripheral by a center fixation, this rotating disk outer rim is extended with some blades, internal diameter orientation ring-type iron oxygen magnet then is multipole anisotropy permanent magnet, its structure outer rim is not have a magnetic conduction skin of magnetic, inner edge is the magnetic internal layer with magnetic, and is looped around around the stator.
Wherein, the pedestal side is provided with the Hall subassembly of an induction internal diameter orientation ring-type iron oxygen magnet rotating speed.
Wherein, rotating disk and fan blade are plastics one ejection formation.
The utility model includes following two kinds of operational modes in the specific implementation at least by the principle of above-mentioned external rotor rotation with outputting power:
1. when being used in motor, aforementioned pedestal, stator and external rotor all are arranged in the motor case, and external rotor drives the rotating shaft rotation on the pedestal, and this rotating shaft passes motor case and outputting power, with the power output shaft as motor.
2. when being used in fan, directly rotor exterior is provided with fan blade outside, when external rotor rotates, fan blade and synchronous rotation, make blade reach the air blast effect.
In addition, aforementioned internal diameter orientation ring-type iron oxygen magnet being divided into magnetic internal layer and the outer field purpose of magnetic conduction, is to allow the magnetic line of force of the magnetic internal layer magnetic conduction skin of passing through promptly turn back, to shorten magnetic loop, and increase magnetic force, raising magnetic energy product, and then improve the efficient of outward rotation type DC Brushless Motor and fan.Not as known neodymium iron boron composite wood or half-moon-shaped sheet Ferrite, use is when outward rotation type DC Brushless Motor and fan, its magnetic line of force all need be through constituting a magnetic loop with the inner face stator behind the iron rotating disk of magnet periphery and the air again, so the loss of the magnetic line of force is very big, and the usefulness of motor and fan is reduced.
Description of drawings
Describe in detail of the present utility model concrete below in conjunction with drawings and the specific embodiments
Technology contents, wherein:
Fig. 1 is the first embodiment organigram that the utility model is used in the outward rotation type DC Brushless Motor.
Fig. 2 is the flux loop schematic diagram of internal diameter orientation ring-type iron oxygen magnet.
Fig. 3 is the second embodiment organigram that the utility model is used in the outward rotation type fan.
Embodiment
First embodiment as shown in Figure 1 is that the utility model is used in the organigram of " outward rotation type DC Brushless Motor ", and this outward rotation type DC Brushless Motor 90 is to rotate outputting power by a rotating shaft.In the icon, be provided with belt pulley 91 at the rotating shaft front end, when rotating shaft is rotated, belt pulley 91 with the rotation output that is used as power.Certainly, the rotating shaft front end also can be provided with fan blade or other need rotate the assembly of driving.
In the present embodiment, outward rotation type DC Brushless Motor 90 inside are provided with a pedestal 10, a stator 20 and is surrounded on the external rotor 30 around the stator 20, wherein:
Make up by said modules, when power supply imports stator 20 in electronics commutation mode and when producing magnetic pole and changing alternately, can produce multipole internal diameter orientation ring-type iron oxygen magnet 40 and attract and rejection, and then drive 30 rotations of whole external rotor, and drive rotating shafts 12 via rotating disk 31 and rotate synchronously, with can be by rotating shaft 12 outputting powers, the speed of external rotor 30 rotations then can make the motor normal operation by Hall subassembly 13 induction back output signals for control.
As shown in Figure 2, aforementioned internal diameter orientation ring-type iron oxygen magnet 40 is multipole anisotropy permanent magnet (the few more rotating speed of number of poles is fast more), its ring body is divided into does not have the magnetic conduction outer 41 of magnetic and a magnetic internal layer 42 with magnetic, the magnetic line of force of the magnetic internal layer 42 magnetic conduction skin 41 of passing through is promptly turned back, and has to shorten magnetic loop and increase magnetic force, improve the characteristic of magnetic energy product.Not if known neodymium iron boron composite wood or half-moon-shaped sheet Ferrite, use is when the outward rotation type DC Brushless Motor, its magnetic line of force all need be through constituting a magnetic loop with the inner face stator behind the iron material of magnet periphery and the air again, and so the loss of the magnetic line of force is very big, and the usefulness of motor is significantly reduced.
Second embodiment as shown in Figure 3 is that the utility model is used in the schematic diagram of " outward rotation type fan ".Its inside is to be surrounded on stator 20 external rotor 30 on every side by a pedestal 10, a stator 20 and to be constituted equally, import the induction coil 22 of stator 20 in electronics commutation mode by power supply, making one-piece stator 20 produce magnetic pole changes alternately, and then the internal diameter orientation ring-type iron oxygen magnet 40 of driving external rotor 30 and the action of rotating disk 31, its principle is identical with first embodiment, does not give unnecessary details in addition at this.
What present embodiment was different with first embodiment is, present embodiment is not to be arranged in the motor case that transmission uses, and the center drive-connecting shaft of the effect of rotating shaft 12 when only being intended for external rotor 30 rotations do not pass the shell outputting power.Remove this, present embodiment directly is provided with plurality of fans blade 93 in rotating disk 31 outer rims of external rotor 30, drive the internal diameter orientation ring-type iron oxygen magnet 40 of external rotor 30 when stator 20, when rotating with seasonal rotating disk 31, the fan blade 93 that rotating disk 31 outer rims are provided with synchronous rotation, can produce wind-force and form an outward rotation type fan via fan blade 93.
In the present embodiment, magnetic conduction of internal diameter orientation ring-type iron oxygen magnet 40 outer 41 and the magnetic internal layer 42 with magnetic still are epochmaking assembly.Magnetic conduction skin 41 is promptly turned back because the magnetic line of force of the magnetic internal layer 42 of internal diameter orientation ring-type iron oxygen magnet 40 is passed through, therefore internal diameter orientation ring-type iron oxygen magnet 40 peripheries need not be provided with iron material and can constitute a magnetic loop with the inner face stator, and rotating disk 31 need not be made with the metal magnetic conducting material; Change speech, the rotating disk 31 of present embodiment outward rotation type fan and fan blade 93 can be utilized plastics one ejection formation, and rotating disk 31 inner edges can be directly fixing for internal diameter orientation ring-type iron oxygen magnet 40, significantly alleviate the weight of fan, be specially adapted to the various radiator fan of palpus high speed rotating, and the reduction known techniques because of being set, iron material produces shortcomings such as off-centre and vibration.
The title of above-mentioned each assembly is decided by the convenient embodiment of the present utility model of description, but not in order to limit the interest field of this case; The equivalence conversion that every foundation creation spirit of the present utility model is done substitutes, all should be in the protection range of this case.
Claims (4)
1. the outward rotation type DC Brushless Motor with internal diameter orientation ringshaped magnet is to be provided with in motor case, it is characterized in that, comprising:
One pedestal is fixed in motor case inside, has a rotatable rotating shaft, and this rotating shaft passes the shell of motor;
One stator is fixed in the outer rim of rotating shaft on the pedestal, further includes one group of yoke and induction coil;
One external rotor, further formed in the internal diameter orientation ring-type iron oxygen magnet that the rotating disk and of rotating shaft is fixed in the rotating disk inner peripheral by a center fixation, this internal diameter orientation ring-type iron oxygen magnet is multipole anisotropy permanent magnet, its structure outer rim is not have a magnetic conduction skin of magnetic, inner edge is the magnetic internal layer with magnetic, and is looped around around the stator.
2. the outward rotation type fan with internal diameter orientation ringshaped magnet is characterized in that, is to comprise:
One pedestal for stator and the external rotor group position of halting, has a rotatable rotating shaft;
One stator is fixed in the outer rim of rotating shaft on the pedestal, further includes one group of yoke and induction coil;
One external rotor, further formed in the internal diameter orientation ring-type iron oxygen magnet that the rotating disk and of rotating shaft is fixed in the rotating disk inner peripheral by a center fixation, this rotating disk outer rim is extended with some blades, internal diameter orientation ring-type iron oxygen magnet then is multipole anisotropy permanent magnet, its structure outer rim is not have a magnetic conduction skin of magnetic, inner edge is the magnetic internal layer with magnetic, and is looped around around the stator.
3. have the outward rotation type DC Brushless Motor and the fan of internal diameter orientation ringshaped magnet as claimed in claim 1 or 2, it is characterized in that, wherein, the pedestal side is provided with the Hall subassembly of an induction internal diameter orientation ring-type iron oxygen magnet rotating speed.
4. as having the outward rotation type fan of internal diameter orientation ring-type iron oxygen magnet as described in the claim 2, it is characterized in that wherein, rotating disk and fan blade are plastics one ejection formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520129036 CN2847670Y (en) | 2005-11-01 | 2005-11-01 | External rotary DC brushless motor and fan with inner radial matching circular magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520129036 CN2847670Y (en) | 2005-11-01 | 2005-11-01 | External rotary DC brushless motor and fan with inner radial matching circular magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2847670Y true CN2847670Y (en) | 2006-12-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520129036 Expired - Lifetime CN2847670Y (en) | 2005-11-01 | 2005-11-01 | External rotary DC brushless motor and fan with inner radial matching circular magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2847670Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908809B (en) * | 2009-06-08 | 2013-02-27 | 深圳华任兴科技有限公司 | Outer rotor brushless DC motor with stator magnetic circuit constructed based on modularized mode |
| CN106787580A (en) * | 2017-03-29 | 2017-05-31 | 大连碧蓝节能环保科技有限公司 | Pin-connected panel micro brushless dc motor |
| CN108496300A (en) * | 2016-02-22 | 2018-09-04 | 深圳市大疆灵眸科技有限公司 | Motor position senses |
| CN110323860A (en) * | 2018-03-28 | 2019-10-11 | 日本电产株式会社 | Motor |
| TWI686037B (en) * | 2019-01-10 | 2020-02-21 | 建準電機工業股份有限公司 | motor |
| CN110829650A (en) * | 2018-08-14 | 2020-02-21 | 佛山市建准电子有限公司 | Rotor of motor |
| CN113964968A (en) * | 2020-07-16 | 2022-01-21 | 江门市邦特电子电器有限公司 | Permanent magnet ring, motor using permanent magnet ring, manufacturing method and die |
-
2005
- 2005-11-01 CN CN 200520129036 patent/CN2847670Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908809B (en) * | 2009-06-08 | 2013-02-27 | 深圳华任兴科技有限公司 | Outer rotor brushless DC motor with stator magnetic circuit constructed based on modularized mode |
| CN108496300A (en) * | 2016-02-22 | 2018-09-04 | 深圳市大疆灵眸科技有限公司 | Motor position senses |
| US10903723B2 (en) | 2016-02-22 | 2021-01-26 | Sz Dji Osmo Technology Co., Ltd. | Motor positional sensing |
| CN108496300B (en) * | 2016-02-22 | 2022-05-27 | 深圳市大疆灵眸科技有限公司 | Motor position sensing |
| US11411472B2 (en) | 2016-02-22 | 2022-08-09 | Sz Dji Osmo Technology Co., Ltd. | Motor positional sensing |
| CN106787580A (en) * | 2017-03-29 | 2017-05-31 | 大连碧蓝节能环保科技有限公司 | Pin-connected panel micro brushless dc motor |
| CN106787580B (en) * | 2017-03-29 | 2018-10-12 | 大连碧蓝节能环保科技有限公司 | Pin-connected panel micro brushless dc motor |
| CN110323860A (en) * | 2018-03-28 | 2019-10-11 | 日本电产株式会社 | Motor |
| CN110829650A (en) * | 2018-08-14 | 2020-02-21 | 佛山市建准电子有限公司 | Rotor of motor |
| TWI686037B (en) * | 2019-01-10 | 2020-02-21 | 建準電機工業股份有限公司 | motor |
| CN113964968A (en) * | 2020-07-16 | 2022-01-21 | 江门市邦特电子电器有限公司 | Permanent magnet ring, motor using permanent magnet ring, manufacturing method and die |
| CN113964968B (en) * | 2020-07-16 | 2024-03-15 | 江门市邦特电子电器有限公司 | Permanent magnet ring, motor using same, manufacturing method and mold |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20061213 |
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| EXPY | Termination of patent right or utility model |