CN107332389A - A kind of blower motor and hair-dryer - Google Patents
A kind of blower motor and hair-dryer Download PDFInfo
- Publication number
- CN107332389A CN107332389A CN201710734183.3A CN201710734183A CN107332389A CN 107332389 A CN107332389 A CN 107332389A CN 201710734183 A CN201710734183 A CN 201710734183A CN 107332389 A CN107332389 A CN 107332389A
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- CN
- China
- Prior art keywords
- magnetic bearing
- radial
- armature spindle
- blower motor
- radial direction
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to hair-dryer technical field, more particularly to a kind of blower motor of use magnetic suspension bearing.A kind of blower motor of the present invention, including stator, rotor, rotor includes rotor permanent magnet and armature spindle, at least one radial direction magnetic bearing and at least one axial magnetic bearing are arranged with armature spindle, rotor permanent magnet is disposed in proximity to the end of the armature spindle, radial direction magnetic bearing and axial magnetic bearing are arranged at one end that armature spindle stretches out from rotor permanent magnet, upper axial magnetic bearing opens up fluted, armature spindle is provided with the projection being placed in groove, by groove and male cooperation, to limit the skew of armature spindle vertically.The hair-dryer of the present invention includes the blower motor.The blower motor and hair-dryer, solve existing motor and are limited the problem of can not improving rotating speed by bearing, and it is not only operated reliably, but also greatly extend service life, improve operating efficiency.
Description
Technical field
The present invention relates to hair-dryer technical field, more particularly to a kind of use magnetic suspension bearing blower motor and have
The hair-dryer of the blower motor.
Background technology
Hair-dryer is mainly used in the drying and shaping of hair, but also is available for laboratory, psyciotherapy room and industrial production, art designing etc.
Aspect is made local desiccation, heating and physiotherapy and is used, and is combined by one group of heating wire and one high rotating speed small fan.It is powered
When, heating wire can produce heat, and the wind of fan blowout passes through heating wire, reforms into hot blast.
The motor types according to used in it, can be divided into exchange series excitation type, exchange shaded-pole and direct current permanent magnetic.Series excitation
The advantage of formula hair-dryer is that detent torque is big, and rotating speed is high, is adapted to the powerful hair-dryer of manufacture；Have the disadvantage that noise is big, commutator
There is certain interference to telecommunication apparatus.The advantage of shaded-pole hair-dryer is that noise is small, and long lifespan is not resulted in dry to telecommunication apparatus
Disturb；Have the disadvantage that rotating speed is low, startability is poor, weight is big.
In the prior art, in order to realize the miniaturization and lightweight of volume, while meeting higher rotating speed effect.However,
This kind of motor be usually be made up of casing, permanent-magnet steel, carbon brush, rotor and rotor windings, its in the running, because of carbon brush and commutation
High-speed friction can be produced between device while making the continuous switching electric current of rotor windings, be result in and easily produced between carbon brush and commutator
Spark, if rotating speed is too high will to cause heavy wear between carbon brush and commutator, so as to influence life of product, or even burns rapidly.
According to conventional brushless motor as motor of dust collector, at high speed, its bearing causes temperature to raise due to mechanical friction, from
And bearing damage is caused, make maintenance and change frequent, causing existing brushless electric machine, it can not bear excessive speeds so that turn
Fast maximum can only accomplish 80000RPM or so.
The content of the invention
It is an object of the invention to propose a kind of blower motor and hair-dryer, solve existing motor and limited by bearing
The problem of rotating speed can not being improved so that the maximum speed of motor is up to 150000RPM, and it is not only operated reliably, but also greatly
Ground extends service life, improves operating efficiency.
For up to this purpose, the present invention uses following technical scheme：
On the one hand, the present invention provides a kind of blower motor, including stator, rotation are arranged at the rotor in the stator,
The rotor includes rotor permanent magnet and axially disposed armature spindle, be arranged with the armature spindle at least one be used for radially
Adjust the radial direction magnetic bearing and at least one axial magnetic axis for being used to be adjusted axially the rotor shaft position of the rotor shaft position
Hold, wherein, the rotor permanent magnet is disposed in proximity to the end of the armature spindle, the radial direction magnetic bearing and the axial magnetic axis
Hold and be arranged at one end that the armature spindle stretches out from the rotor permanent magnet, the upper axial magnetic bearing opens up fluted,
The armature spindle is provided with the projection being placed in the groove, described to limit by the groove and the male cooperation
The skew of armature spindle vertically.
Wherein, impeller is also equipped with the armature spindle, the impeller is arranged on the armature spindle to be turned away from described
The other end of sub- permanent magnet, the radial direction magnetic bearing and the axial magnetic bearing be located at the impeller and the rotor permanent magnet it
Between.
Wherein, the radial direction magnetic bearing is two, and the axial magnetic bearing is arranged between two radial direction magnetic bearings.
Wherein, the raised shaft shoulder or axle sleeve for annular, the groove is annular groove.
Wherein, the axial magnetic bearing has been wholely set axial position sensor, for monitoring the armature spindle in axial direction
Present position.
Wherein, in addition at least one be used for monitor radial-direction position sensor of the armature spindle in radial direction present position,
One described one radial direction magnetic bearing of radial-direction position sensor correspondence is set, and the radial-direction position sensor connects motor control
Making sheet.
Wherein, the radial-direction position sensor is two, two institutes of two radial direction magnetic bearings and corresponding setting
State the both sides that radial-direction position sensor is respectively symmetrically arranged at the axial magnetic bearing.
Wherein, two radial direction magnetic bearings are respectively upper radial direction magnetic bearing and lower radial direction magnetic bearing, two radial directions
Position sensor is respectively upper radial-direction position sensor and lower radial-direction position sensor, and the upper radial-direction position sensor corresponds to
The upper radial direction magnetic bearing, the lower radial-direction position sensor corresponds to the lower radial direction magnetic bearing.
Wherein, the periphery of the radial-direction position sensor is provided with the fixed plate for being used for fixing the radial-direction position sensor.
Wherein, the blower motor sets an electricity for individually controlling the axial magnetic bearing and the radial direction magnetic bearing
Source.
On the other hand, the present invention provides a kind of hair-dryer with the blower motor.
Beneficial effects of the present invention are：
The blower motor of the present invention, using magnetic suspension principle, realizes that radial direction suspends using two radial direction magnetic bearings
In aerial, the limitation of axial direction is realized using axial magnetic bearing, thus can accurately and reliably realize the position control of armature spindle
System, and in armature spindle rotation process, it does not contact with radial direction magnetic bearing, axial magnetic bearing and avoids producing abrasion, so that
The high speed demand of hair-dryer can be well adapted for, existing motor can be overcome, which to be limited by bearing, can not carry high-revolving ask
Topic, operating is reliable, greatly extends service life, improves operating efficiency.
Brief description of the drawings
Fig. 1 is the cross-sectional view of the blower motor of the present invention.
Fig. 2 is partial enlargement structural representation of the blower motor at I in Fig. 1.
In figure：1- motor control panels；2- rotors；3- stators；The upper radial-direction position sensors of 4-；The upper radial direction magnetic bearings of 5-；6-
Axial magnetic bearing；Radial direction magnetic bearing under 7-；Radial-direction position sensor under 8-；9- impellers；10- armature spindles.
Embodiment
Traditional motor is made up of stator and rotor, is coupled between stator and rotor by mechanical bearing or there is machinery
Contact, therefore there is mechanical friction during rotor motion.Mechanical friction makes component wear, produces mechanical oscillation and noise, and
And part can be caused to generate heat, and make lubricant degradation, serious meeting makes motor gas-gap uneven, heating in winding, temperature rise increase,
So as to reduce motor efficiency, shorten motor service life.
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
As shown in figure 1, a kind of blower motor that one embodiment of the invention is provided, including stator 3, rotation are arranged at institute
The rotor 2 in stator 3 is stated, the rotor 2 includes rotor permanent magnet and the armature spindle 10 axially extended, the rotor permanent magnet
Set close to one end of the armature spindle 10, the armature spindle 10 extends is arranged with least one on the part of the stator 3
Radial direction magnetic bearing for the position of armature spindle described in radiai adjustment 10 is used to be adjusted axially the armature spindle 10 with least one
The axial magnetic bearing put, the radial direction magnetic bearing can be chosen from the quantity of the axial magnetic bearing according to the different requirements of motor.
Rotor suspension is got up by magneticaction, made without Mechanical Contact between rotor and other any parts, so the motor
In the absence of mechanical wear, rotor can run to 150000RPM rotating speed, with without mechanical wear, energy consumption is low, noise is small, the longevity
Life is long, without lubrication, without oily pollution the advantages of.
Specifically, impeller 9 is additionally provided with the armature spindle 10, the impeller 9 is arranged at far on the armature spindle 10
From the other end of the rotor permanent magnet, the radial direction magnetic bearing and the axial magnetic bearing are located at the impeller 9 and described turn
Between sub- permanent magnet.The axial magnetic bearing has been wholely set axial position sensor, for monitoring the armature spindle in axial direction
Present position.In the present embodiment, the radial direction magnetic bearing is two, and the axial magnetic bearing 6 is arranged at two radial directions
Between magnetic bearing.
It is preferred that, the upper axial magnetic bearing 6 opens up fluted, and the armature spindle 10, which is provided with, to be placed in the groove
Projection, by the groove and the male cooperation, to limit the skew of the armature spindle 10 vertically.In the present embodiment
In, the raised shaft shoulder or axle sleeve for annular, the groove is annular groove.Meanwhile, the groove also may be used within the specific limits
Limitation armature spindle is moved in radial directions.
The hair-dryer, which also includes at least one, to be used to monitor radial position biography of the armature spindle 10 in radial direction present position
Sensor, the periphery of the radial-direction position sensor is provided with the fixed plate for being used for fixing the radial-direction position sensor.Described in one
One radial direction magnetic bearing of radial-direction position sensor correspondence is set, and the radial-direction position sensor connects motor control panel 1.Tool
Body, the radial-direction position sensor is two, and two radial direction magnetic bearings are respectively upper radial direction magnetic bearing 5 and lower radial direction magnetic
Bearing 7, two radial-direction position sensors are respectively upper radial-direction position sensor 4 and lower radial-direction position sensor 8, it is described on
Radial-direction position sensor 4 corresponds to the upper radial direction magnetic bearing 5, and the lower radial-direction position sensor 8 corresponds to the lower radial direction
Magnetic bearing 7.Two radial direction magnetic bearings and two radial-direction position sensors of corresponding setting are respectively symmetrically arranged at
The both sides of the axial magnetic bearing.
The magnetic suspension bearing of the blower motor is coordinated by motor control panel to be controlled, and motor on startup, is first passed through
The axial position sensor carried in radial-direction position sensor and axial magnetic bearing detects the position of armature spindle, by the rotating shaft
Deviation signal transmit controller into motor control panel, controller is detected to radial-direction position sensor and axial position sensor
The position error signal arrived carries out the computing of appropriateness, and the control signal after computing is converted into control after power of motor amplifier
Electric current processed, control electric current produces magnetic force in magnetic suspension bearing, so as to drive armature spindle correction position, therefore, armature spindle can
Reference position is quickly returning to, is axially being arrived separately in finally determination armature spindle with radial direction after requiring position, motor starts running.
When the blower motor is stalled, because rotatory inertia still can keep rotating certain time after rotor power-off, this
Shi Ruguo magnetic suspension bearings are powered off, and rotor disequilibrium can cause motor damage, in this way, the motor need to be set in rotor
After stopping operating completely, then the power supply of magnetic suspension bearing coil is disconnected, preferred embodiment, the motor sets one to charge
Power supply is with the coil power supply to magnetic suspension bearing, it is to avoid rotor disequilibrium after motor power-off, so that motor is damaged, charging electricity
Persistently charged in electric motor starting in source.
The blower motor can adjust electromagnetic parameter by controller when in use, rotor is axially and radially being had foot
Enough magnetic pulls, will not cause the position of rotor to change, it is ensured that motor is normally run because of the change of load.
It is preferred that, in the present embodiment, radial direction magnetic bearing and axial magnetic bearing are made of metal material, preferably can
Using high-performance metal materials to reduce bearing volume, noise is reduced, electric efficiency is improved；Duct design is cooling wind simultaneously
Road, impeller 12 is cooled down when rotating to bearing, so as to improve bearing life.
In the present embodiment, radial-direction position sensor is fixed in special fixed plate, and sets high-precision in fixed plate
The location structure of degree, makes radial-direction position sensor detect that the position deviation of rotor is small, precision is high.
The blower motor of the present invention, as a kind of brand-new blower motor structure, it is applied to hair-dryer so that this
The rotating speed of the hair-dryer of invention is high, and noise is small, and long lifespan greatly improves hair-dryer air output.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed in any way.Based on explanation herein, the technology of this area
Personnel, which would not require any inventive effort, can associate other embodiments of the present invention, and these modes are fallen within
Within protection scope of the present invention.
Claims (11)
1. a kind of blower motor, including stator (3), rotation are arranged at the rotor (2) in the stator (3), it is characterised in that
The rotor (3) includes being arranged with least on rotor permanent magnet and axially disposed armature spindle (10), the armature spindle (10)
One is used for the radial direction magnetic bearing of armature spindle (10) position described in radiai adjustment and at least one and is used to be adjusted axially the rotor
The axial magnetic bearing (6) of axle (10) position, wherein, the rotor permanent magnet is disposed in proximity to the end of the armature spindle (10),
The radial direction magnetic bearing and the axial magnetic bearing are arranged at what the armature spindle (10) stretched out from the rotor permanent magnet
One end, the upper axial magnetic bearing (6) opens up fluted, the armature spindle (10) be provided be placed in it is convex in the groove
Rise, by the groove and the male cooperation, to limit the skew of the armature spindle (10) vertically.
2. blower motor according to claim 1, it is characterised in that be also equipped with impeller on the armature spindle (10)
(9), the impeller (9) is arranged at the other end away from the rotor permanent magnet, the radial direction magnetic on the armature spindle (10)
Bearing and the axial magnetic bearing are located between the impeller (9) and the rotor permanent magnet.
3. blower motor according to claim 1, it is characterised in that the radial direction magnetic bearing is two, the axial direction
Magnetic bearing (6) is arranged between two radial direction magnetic bearings.
4. blower motor according to claim 3, it is characterised in that the raised shaft shoulder or axle sleeve for annular, institute
Groove is stated for annular groove.
5. the blower motor according to any one of Claims 1 to 4, it is characterised in that the axial magnetic bearing is integrally set
Axial position sensor is equipped with, for monitoring the armature spindle in axial present position.
6. blower motor according to claim 3, it is characterised in that be also used to monitor the rotor including at least one
Axle (10) is in the radial-direction position sensor of radial direction present position, the one radial direction magnetic of a radial-direction position sensor correspondence
Bearing is set, the radial-direction position sensor connection motor control panel (1).
7. blower motor according to claim 6, it is characterised in that the radial-direction position sensor is two, two
The radial direction magnetic bearing and two radial-direction position sensors of corresponding setting are respectively symmetrically arranged at the axial magnetic axis
The both sides held.
8. blower motor according to claim 7, it is characterised in that two radial direction magnetic bearings are respectively upper radial direction
Magnetic bearing (5) and lower radial direction magnetic bearing (7), two radial-direction position sensors be respectively upper radial-direction position sensor (4) and
Lower radial-direction position sensor (8), the upper radial-direction position sensor (4) corresponds to the upper radial direction magnetic bearing (5), the lower footpath
Correspond to the lower radial direction magnetic bearing (7) to position sensor (8).
9. the blower motor according to claim 6,7 or 8, it is characterised in that the periphery of the radial-direction position sensor
Provided with the fixed plate for fixing the radial-direction position sensor.
10. blower motor according to claim 1, it is characterised in that the blower motor sets an individually control
The power supply of the axial magnetic bearing and the radial direction magnetic bearing.
11. a kind of hair-dryer of the blower motor with described in any one of claim 1~10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734183.3A CN107332389B (en) | 2017-08-24 | 2017-08-24 | Blower motor and blower |
| PCT/CN2017/109025 WO2019037266A1 (en) | 2017-08-24 | 2017-11-02 | Hair dryer motor and hair dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734183.3A CN107332389B (en) | 2017-08-24 | 2017-08-24 | Blower motor and blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107332389A true CN107332389A (en) | 2017-11-07 |
| CN107332389B CN107332389B (en) | 2021-09-14 |
Family
ID=60224731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710734183.3A Active CN107332389B (en) | 2017-08-24 | 2017-08-24 | Blower motor and blower |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107332389B (en) |
| WO (1) | WO2019037266A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019037265A1 (en) * | 2017-08-24 | 2019-02-28 | 莱克电气股份有限公司 | Hair dryer motor and hair dryer |
| CN111162629A (en) * | 2020-01-17 | 2020-05-15 | 天津飞旋科技有限公司 | Method for arranging stator and rotor of magnetic suspension motor |
| CN112039262A (en) * | 2020-08-04 | 2020-12-04 | 东莞市锐天机电科技有限公司 | Motor and air suspension centrifugal fan applying same |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020000384A (en) * | 2000-06-24 | 2002-01-05 | 이형도 | Thrust magnetic bearing motor |
| KR20040009157A (en) * | 2002-07-22 | 2004-01-31 | 삼성전기주식회사 | Motor having thrust magnetic bearing |
| CN1666026A (en) * | 2003-07-04 | 2005-09-07 | 三菱电机株式会社 | Magnetic bearing device |
| JP2008054413A (en) * | 2006-08-24 | 2008-03-06 | Ntn Corp | Motor-integrated magnetic bearing device |
| CN102979816A (en) * | 2011-09-05 | 2013-03-20 | 株式会社安川电机 | Main shaft device |
| CN104539096A (en) * | 2014-12-31 | 2015-04-22 | 天津美湖机电科技有限公司 | Magnetic suspension high-speed motor |
| CN106505780A (en) * | 2016-12-15 | 2017-03-15 | 南通金驰机电有限公司 | A kind of magnetic suspension permanent magnet direct-drive high-speed motor |
| CN206397654U (en) * | 2016-12-24 | 2017-08-11 | 重庆宙盾新能源技术开发有限公司 | Magnetic suspending wind turbine generator group |
| CN207353982U (en) * | 2017-08-24 | 2018-05-11 | 莱克电气股份有限公司 | A kind of blower motor and hair-dryer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7023118B1 (en) * | 2002-03-14 | 2006-04-04 | The United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration | System for controlling a magnetically levitated rotor |
| US7471022B2 (en) * | 2006-09-22 | 2008-12-30 | Sortore Christopher K | Magnetic bearing |
| CN101699754B (en) * | 2009-10-28 | 2012-03-14 | 中国船舶重工集团公司第七一○研究所 | Magnetic suspension flywheel battery device |
| CN102290946B (en) * | 2011-05-25 | 2013-02-27 | 北京虎渡能源科技有限公司 | High-power air suspension permanent magnet high-speed motor |
-
2017
- 2017-08-24 CN CN201710734183.3A patent/CN107332389B/en active Active
- 2017-11-02 WO PCT/CN2017/109025 patent/WO2019037266A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020000384A (en) * | 2000-06-24 | 2002-01-05 | 이형도 | Thrust magnetic bearing motor |
| KR20040009157A (en) * | 2002-07-22 | 2004-01-31 | 삼성전기주식회사 | Motor having thrust magnetic bearing |
| CN1666026A (en) * | 2003-07-04 | 2005-09-07 | 三菱电机株式会社 | Magnetic bearing device |
| JP2008054413A (en) * | 2006-08-24 | 2008-03-06 | Ntn Corp | Motor-integrated magnetic bearing device |
| CN102979816A (en) * | 2011-09-05 | 2013-03-20 | 株式会社安川电机 | Main shaft device |
| CN104539096A (en) * | 2014-12-31 | 2015-04-22 | 天津美湖机电科技有限公司 | Magnetic suspension high-speed motor |
| CN106505780A (en) * | 2016-12-15 | 2017-03-15 | 南通金驰机电有限公司 | A kind of magnetic suspension permanent magnet direct-drive high-speed motor |
| CN206397654U (en) * | 2016-12-24 | 2017-08-11 | 重庆宙盾新能源技术开发有限公司 | Magnetic suspending wind turbine generator group |
| CN207353982U (en) * | 2017-08-24 | 2018-05-11 | 莱克电气股份有限公司 | A kind of blower motor and hair-dryer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019037265A1 (en) * | 2017-08-24 | 2019-02-28 | 莱克电气股份有限公司 | Hair dryer motor and hair dryer |
| CN111162629A (en) * | 2020-01-17 | 2020-05-15 | 天津飞旋科技有限公司 | Method for arranging stator and rotor of magnetic suspension motor |
| CN112039262A (en) * | 2020-08-04 | 2020-12-04 | 东莞市锐天机电科技有限公司 | Motor and air suspension centrifugal fan applying same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107332389B (en) | 2021-09-14 |
| WO2019037266A1 (en) | 2019-02-28 |
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