CN101771321A - Anisotropic sintered ferrite inner diameter orientation magnetic steel used by externally rotating brushless motor rotor - Google Patents
Anisotropic sintered ferrite inner diameter orientation magnetic steel used by externally rotating brushless motor rotor Download PDFInfo
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- CN101771321A CN101771321A CN201010109932A CN201010109932A CN101771321A CN 101771321 A CN101771321 A CN 101771321A CN 201010109932 A CN201010109932 A CN 201010109932A CN 201010109932 A CN201010109932 A CN 201010109932A CN 101771321 A CN101771321 A CN 101771321A
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- magnetic
- brushless motor
- magnetic steel
- motor rotor
- inner diameter
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Abstract
The invention relates to the brushless motor rotor, in particular to anisotropic sintered ferrite inner diameter orientation magnetic steel used by an externally rotating brushless motor rotor. The magnetic steel comprises an outer rotor (1), a turntable (2), an inner diameter alignment annular ferrite magnetite (3), a magnetic conductive outer layer (4), a magnetic inner layer (5), a stator (6), a bearing (7), a belt pulley (8), a shell (9), an induction coil (10), a Hall component (11), a pedestal (12), a rotating shaft (13) and a yoke block (14). The magnetic steel has the advantages of good enclosing performance, no magnetic leakage phenomenon, stable work, low cost and wide application range.
Description
Technical field:
What the present invention relates to is a kind of brushless motor rotor, and what be specifically related to is that the outer brushless motor rotor that changes uses heteropolarity sintered ferrite internal-diameter orientated magnetic steel.
Background technology:
Usually brushless motor can be divided into unofficial biography and two kinds of structures of interior commentaries on classics, both utilizations of having nothing in common with each other.The shell of outer transition can rotate together along with the axle center, if make enough greatly, the outside puts wheel again, has just become so-called in-wheel motor; Interior transition is very similar with traditional AC motor, has only the axle center to move.More than 2 times of the commentaries on classics scooter of brushless motor carbon brush motor at the same level.Magnet steel internal diameter closed performance in the past is not high, occurs the magnetic leakage phenomenon easily, and material and temperature limited system are big, and the cost height.
Summary of the invention:
The purpose of this invention is to provide the outer brushless motor rotor that changes and use heteropolarity sintered ferrite internal-diameter orientated magnetic steel, its closed performance is good, no magnetic leakage phenomenon, and working stability and cost are low, the scope of application.
In order to solve the existing problem of background technology, the present invention is by the following technical solutions: it comprises external rotor 1, rotating disk 2, internal diameter orientation ring-type iron oxygen magnetite 3, magnetic conduction skin 4, magnetic internal layer 5, stator 6, Bearing 7, belt pulley 8, shell 9, induction coil 10, Hall subassembly 11, pedestal 12, rotating shaft 13 and yoke 14; External rotor 1 inboard is enclosed with rotating disk 2, internal diameter orientation ring-type iron oxygen magnetite 3, magnetic conduction outer 4 and magnetic internal layer 5 successively, magnetic internal layer 5 inboards are provided with stator 6, be enclosed with yoke 14 in the induction coil 10, the center is provided with rotating shaft 13, two places up and down of rotating shaft 13 peripheries are provided with Bearing 7, and least significant end is provided with pedestal 12, and the limit of pedestal 12 is provided with Hall subassembly 11, the parts outer periphery is equipped with belt pulley 8, and outermost is provided with shell 9.
Closed performance of the present invention is good, no magnetic leakage phenomenon, and working stability and cost are low, and be applied widely.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Embodiment:
Referring to Fig. 1, this embodiment is by the following technical solutions: it comprises external rotor 1, rotating disk 2, internal diameter orientation ring-type iron oxygen magnetite 3, magnetic conduction skin 4, magnetic internal layer 5, stator 6, Bearing 7, belt pulley 8, shell 9, induction coil 10, Hall subassembly 11, pedestal 12, rotating shaft 13 and yoke 14; External rotor 1 inboard is enclosed with rotating disk 2, internal diameter orientation ring-type iron oxygen magnetite 3, magnetic conduction outer 4 and magnetic internal layer 5 successively, magnetic internal layer 5 inboards are provided with stator 6, be enclosed with yoke 14 in the induction coil 10, the center is provided with rotating shaft 13, two places up and down of rotating shaft 13 peripheries are provided with Bearing 7, and least significant end is provided with pedestal 12, and the limit of pedestal 12 is provided with Hall subassembly 11, the parts outer periphery is equipped with belt pulley 8, and outermost is provided with shell 9.
This embodiment can apply to fan, video-signal system radiating module, automobile water-based case group Pu, magnetic coupling water group Pu etc.
Magnetic coupling motor structure operation principle: between two interconnective magnets and the magnetic conductor, both air gaps are 3/16 inch when initial position.Behind the electric motor starting, the magnetic conductor that is connected with motor reaches the rated speed of motor very soon, has relative velocity poor between magnetic conductor and the permanent magnet.The magnetic strength stress that speed difference produces, pulling gap between the two slowly becomes down.Along with the gap reduces, the moment of torsion of transmission increases, and the permanent magnet velocity of rotation that is connected with load is accelerated gradually, when reaching 1/8 inch of the standard clearance of a normal speed operation at last, can realize with the speed rotation by the transmission of moment of torsion between motor and the load.
In the time of the moment of torsion generating period variation of load, the gap between these two of magnetic conductor and permanent magnets are turned can change the moment of torsion transmission of property performance period variation between 1/8 inch to 3/16 inch.
When load occur suddenly transshipping or stuck situation under; the permanent magnet velocity of rotation that is connected with load drops to zero very soon; and the magnetic conductor that is connected with motor continues to rotate according to the speed of motor; the magnetic strength stress of the relative speed difference generation that produces between the two; can be rapidly between the two gap be widened 3/16 inch; thereby reduced the transfer torque between motor and the load, motor can continue operation under low relatively moment of torsion, realizes the purpose of protection motor.
This job specification, actual delay the overload moment of torsion and the transmission between the motor, so claim that it is the delaying type magnetic coupling.Motor is worked under low moment of torsion, and the heat of generation can produce certain damage as can not in time distributing.Taking place under overload or the stuck situation, disable motor does not have any damage to motor in 15S.
This embodiment has following beneficial effect: magnet steel internal diameter oneself forms closed magnetic loop, and the magnet steel external diameter does not have the magnetic leakage phenomenon fully to be taken place, and does not therefore need to add in addition magnetic conductive disk and does magnetic and cover.Because magnet steel internal diameter oneself forms closed magnetic loop, therefore can get high table magnetic flux density.The ferrite sintered body material behavior is: acidproof, alkaline-resisting, humidity, high temperature resistant (150 ℃ of working temperatures) etc.Ferrite Material is cheap, is fit to a large amount of industrial products of producing and consuming.
Claims (1)
1. change brushless motor rotor outward and use heteropolarity sintered ferrite internal-diameter orientated magnetic steel, it is characterized in that it comprises external rotor (1), rotating disk (2), internal diameter orientation ring-type iron oxygen magnetite (3), magnetic conduction skin (4), magnetic internal layer (5), stator (6), Bearing (7), belt pulley (8), shell (9), induction coil (10), Hall subassembly (11), pedestal (12), rotating shaft (13) and yoke (14); External rotor (1) inboard is enclosed with rotating disk (2), internal diameter orientation ring-type iron oxygen magnetite (3), magnetic conduction skin (4) and magnetic internal layer (5) successively, magnetic internal layer (5) inboard is provided with stator (6), be enclosed with yoke (14) in the induction coil (10), the center is provided with rotating shaft (13), peripheral two places up and down of rotating shaft (13) are provided with Bearing (7), least significant end is provided with pedestal (12), the limit of pedestal (12) is provided with Hall subassembly (11), the parts outer periphery is equipped with belt pulley (8), and outermost is provided with shell (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010109932A CN101771321A (en) | 2010-02-20 | 2010-02-20 | Anisotropic sintered ferrite inner diameter orientation magnetic steel used by externally rotating brushless motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010109932A CN101771321A (en) | 2010-02-20 | 2010-02-20 | Anisotropic sintered ferrite inner diameter orientation magnetic steel used by externally rotating brushless motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101771321A true CN101771321A (en) | 2010-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010109932A Pending CN101771321A (en) | 2010-02-20 | 2010-02-20 | Anisotropic sintered ferrite inner diameter orientation magnetic steel used by externally rotating brushless motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101771321A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751836A (en) * | 2011-12-08 | 2012-10-24 | 余姚市精诚高新技术有限公司 | Novel brushless microwave oven cooling fan motor |
| CN110022014A (en) * | 2017-12-15 | 2019-07-16 | 日本电产株式会社 | Spindle motor and disc drive appts with the spindle motor |
-
2010
- 2010-02-20 CN CN201010109932A patent/CN101771321A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751836A (en) * | 2011-12-08 | 2012-10-24 | 余姚市精诚高新技术有限公司 | Novel brushless microwave oven cooling fan motor |
| CN110022014A (en) * | 2017-12-15 | 2019-07-16 | 日本电产株式会社 | Spindle motor and disc drive appts with the spindle motor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100707 |