CN107516990B - Dust collector motor and dust collector - Google Patents
Dust collector motor and dust collector Download PDFInfo
- Publication number
- CN107516990B CN107516990B CN201710734469.1A CN201710734469A CN107516990B CN 107516990 B CN107516990 B CN 107516990B CN 201710734469 A CN201710734469 A CN 201710734469A CN 107516990 B CN107516990 B CN 107516990B
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- Prior art keywords
- rotor
- motor
- dust collector
- rotor shaft
- bearing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
Abstract
The invention relates to the technical field of dust collectors, in particular to a high-speed brushless dust collector motor adopting a magnetic suspension bearing and a dust collector. The invention discloses a dust collector motor, which comprises a stator and a rotor, wherein the dust collector motor is provided with a magnetic suspension bearing for suspending the rotor in the stator, the rotor comprises a rotor shaft, the magnetic suspension bearing comprises an upper axial magnetic bearing which is arranged at one end of the rotor shaft and used for axially adjusting the position of the rotor shaft, the upper axial magnetic bearing is provided with a groove, the rotor shaft is provided with a bulge accommodated in the groove, and the groove is matched with the bulge to limit the axial deviation of the rotor shaft. The dust collector comprises the dust collector motor, wherein the dust collector motor comprises a controller, and the controller actively adjusts the speed of a rotor of the dust collector motor according to the load in the dust collector. The motor of the dust collector and the dust collector can overcome the problem that the rotating speed of the existing motor cannot be increased due to the limitation of a bearing, the operation is reliable, the service life is greatly prolonged, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of dust collectors, in particular to a high-speed brushless dust collector motor adopting a magnetic suspension bearing and a dust collector with the dust collector motor.
Background
The vacuum cleaner motor is required to have a small volume and a high rotational speed while ensuring low noise. At present, most of domestic and foreign main dust collector products adopt a series motor or a brush direct current motor, and in order to realize the miniaturization and the light weight of the volume and simultaneously meet the larger suction effect, the rotating speed is often required to be increased. However, such a motor generally comprises a casing, permanent magnetic steel, a carbon brush, a rotor and a rotor winding, and during operation, high-speed friction is generated between the carbon brush and a commutator while the rotor winding continuously switches current, which easily causes sparks to be generated between the carbon brush and the commutator, and if the rotating speed is too high, the carbon brush and the commutator are seriously worn, thereby affecting the service life of the product, or even being quickly burned out. If adopt conventional brushless motor as the dust catcher motor, under high rotational speed, its bearing leads to energy loss, temperature rising because of mechanical friction to cause the bearing to damage, make to overhaul and change more frequently, lead to its unable high rotational speed that can not bear of current brushless motor, make the rotational speed can only accomplish about 80000RPM at the utmost, can't realize the high performance of ultrahigh rotational speed 150000 RPM.
Disclosure of Invention
The invention aims to provide a dust collector motor and a dust collector, which can solve the problem that the rotating speed of the existing motor cannot be increased due to the limitation of a bearing, are reliable to operate, greatly prolong the service life and improve the working efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
a vacuum cleaner motor comprises a stator and a rotor, wherein the vacuum cleaner motor is provided with a magnetic suspension bearing for suspending the rotor in the stator, the rotor comprises a rotor shaft, the magnetic suspension bearing comprises an upper axial magnetic bearing which is arranged at one end of the rotor shaft and used for axially adjusting the position of the rotor shaft, the upper axial magnetic bearing is provided with a groove, the rotor shaft is provided with a protrusion which is accommodated in the groove, and the protrusion is matched with the groove to limit the axial deviation of the rotor shaft.
As a preferable mode of the motor for a vacuum cleaner, the protrusion is an annular shoulder or a sleeve, and the recess is an annular groove.
As a preferable mode of the vacuum cleaner motor, an impeller is mounted at one end of the rotating shaft, and the upper axial magnetic bearing is located at an end of the rotor shaft where the impeller is not mounted.
In a preferred embodiment of the vacuum cleaner motor, the rotor shaft is provided with an axial position sensor at one axial end thereof, and the upper axial magnetic bearing is provided on a side close to the axial position sensor.
As a preferable mode of the vacuum cleaner motor, the rotor further includes a rotor permanent magnet disposed on the rotor shaft, and radial magnetic bearings for radially adjusting a position of the rotor shaft are respectively disposed on both sides of the rotor permanent magnet.
In a preferred aspect of the vacuum cleaner motor, the upper axial magnetic bearing is located between the radial magnetic bearing and the axial position sensor.
As a preferable mode of the vacuum cleaner motor, the two radial magnetic bearings are respectively arranged in a symmetrical manner with the rotor permanent magnet as a center.
As a preferable mode of the vacuum cleaner motor, the vacuum cleaner further comprises two radial position sensors for monitoring the radial positions of the rotor shafts, each radial position sensor is arranged corresponding to one of the radial magnetic bearings, and the radial position sensors are connected with a motor control board.
As a preferable mode of the vacuum cleaner motor, the two radial magnetic bearings are disposed between the two radial position sensors and are respectively located at both sides of the rotor permanent magnet.
As a preferable mode of the vacuum cleaner motor, the two radial magnetic bearings are an upper radial magnetic bearing and a lower radial magnetic bearing respectively disposed at both ends of the rotor permanent magnet, the two radial position sensors are an upper radial position sensor and a lower radial position sensor respectively, the upper radial position sensor corresponds to the upper radial magnetic bearing, and the lower radial position sensor corresponds to the lower radial magnetic bearing.
As a preferable mode of the cleaner motor, the cleaner motor is provided with a power supply for individually controlling the magnetic bearings.
A vacuum cleaner having the vacuum cleaner motor includes a controller that actively adjusts a speed of a rotor of the vacuum cleaner motor according to a magnitude of a load in the vacuum cleaner.
The invention has the beneficial effects that:
the invention provides a dust collector motor, which mainly aims at the problem that the rotating speed of a motor for a dust collector in the prior art cannot be increased due to the limitation of a bearing.
Drawings
FIG. 1 is a schematic sectional view of a motor for a vacuum cleaner according to the present invention;
fig. 2 is an enlarged partial schematic view of the vacuum cleaner motor of fig. 1 at I.
In the figure: 1-motor control board; 2-an axial position sensor; 3-upper axial magnetic bearing; 4-an upper radial position sensor; 5-upper radial magnetic bearing; 6-a stator; 7-a rotor; 8-lower radial magnetic bearing; 9-lower radial position sensor; 10-an impeller; 11-rotor shaft.
Detailed Description
The traditional motor is composed of a stator and a rotor, wherein the stator and the rotor are connected through a mechanical bearing or have mechanical contact, so that mechanical friction exists in the movement process of the rotor. Mechanical friction not only increases the frictional resistance of the rotor, causes the abrasion of moving parts, generates mechanical vibration and noise, but also causes the heating of the parts, causes the performance of a lubricant to be poor, seriously causes the non-uniform air gap of the motor, generates heat of a winding and increases the temperature rise, thereby reducing the efficiency of the motor and shortening the service life of the motor.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 and 2, a motor for a vacuum cleaner according to an embodiment of the present invention includes a stator 6, and a rotor 7 coaxial with the stator 6 and rotatably disposed in the stator 6, where the rotor 7 includes a rotor permanent magnet and a rotor shaft 11 extending out of the stator 6 along an axial direction of the rotor permanent magnet, and the motor for a vacuum cleaner is provided with a magnetic suspension bearing for suspending the rotor 7 in the stator 6. Specifically, the magnetic suspension bearing includes at least one pair of radial magnetic bearings disposed at both axial ends of the rotor shaft 11 for adjusting the radial position of the rotor shaft 11, and at least one upper axial magnetic bearing for adjusting the axial position of the rotor shaft 11. The dust collector motor is provided with the magnetic suspension bearings at two ends of the rotor shaft 11, the rotor is suspended under the action of magnetic force, and no mechanical contact exists between the rotor and the magnetic suspension bearings, so that the motor has no mechanical wear, and the rotor can run to the rotating speed of 150000RPM (revolution per minute).
In this embodiment, a protrusion is disposed along the periphery of the rotor shaft 11, the upper axial magnetic bearing 3 is provided with a groove, the protrusion is an annular shoulder or a shaft sleeve, and the groove is an annular groove. The protrusions of the rotor shaft 11 are accommodated in the grooves of the upper axial magnetic bearing to limit the movement of the rotor shaft 11 in the axial direction, and meanwhile, the grooves can also limit the movement of the rotor shaft in the radial direction within a certain range.
An impeller 10 is installed to rotor shaft 11's one end, rotor shaft 11 is equipped with an axial position sensor 2 along the axial other end, axial position sensor 2 with rotor shaft 11 is coaxial to be set up, axial position sensor 2 connects motor control panel 1. The upper axial magnetic bearing 3 is arranged at one side close to the axial position sensor 2, and the upper axial magnetic bearing 3 is positioned between the radial magnetic bearing and the axial position sensor 2. Wherein the axial position sensor 2 is used for adjusting the position of the rotor shaft 11 in the axial direction in cooperation with the upper axial magnetic bearing.
The two radial magnetic bearings are respectively arranged on two sides of the rotor permanent magnet of the rotor 7, and in order to suspend the rotor 7, in the embodiment, the two radial magnetic bearings are respectively arranged in a central symmetry manner by taking the rotor permanent magnet of the rotor 7 as a center, so that the two radial magnetic bearings are balanced in stress and more reliable.
The vacuum cleaner motor further comprises two radial position sensors for monitoring the radial positions of the rotor shaft 11, each radial position sensor is arranged corresponding to one of the radial magnetic bearings, and the radial position sensors are connected with the motor control board 1. Specifically, the two radial magnetic bearings are an upper radial magnetic bearing 3 and a lower radial magnetic bearing 8 respectively disposed at two ends of the rotor shaft 11, the two radial position sensors are an upper radial position sensor 4 and a lower radial position sensor 9 respectively, the upper radial position sensor 4 corresponds to the upper radial magnetic bearing 3, and the lower radial position sensor 9 corresponds to the lower radial magnetic bearing 8. The two radial magnetic bearings are arranged between the two radial position sensors and are respectively positioned on two sides of the rotor permanent magnet. Wherein the radial position sensor is used for adjusting the position of the rotor shaft in the radial direction in cooperation with the radial magnetic bearing.
The magnetic suspension bearing of the dust collector motor is controlled by matching the motor control board, when the motor is started, the position of the rotor shaft is detected by the radial position sensor and the axial position sensor, the deviation signal of the rotating shaft is transmitted to the controller of the motor control board, the controller performs proper operation on the position deviation signals detected by the radial position sensor and the axial position sensor, the operated control signal is converted into control current through the motor power amplifier, the control current generates magnetic force in the magnetic suspension bearing, so that the rotor shaft is driven to correct the position, therefore, the rotor shaft can quickly return to a reference position, and the motor starts to operate after the rotor shaft finally reaches the required position in the axial direction and the radial direction.
When the motor of the dust collector stops rotating, the rotor can still keep rotating for a certain time due to rotation inertia after being powered off, and at the moment, if the magnetic suspension bearing is powered off, the rotor loses balance, and the motor can be damaged.
When the dust collector motor is used, the electromagnetic parameters can be adjusted through the controller, so that the rotor has enough magnetic tension in the axial direction and the radial direction, the position of the rotor cannot be changed due to the change of load, and the normal operation of the motor is ensured.
According to the fact that the dust storage amount in the dust collector is different, the load of the motor can be changed, when the dust in the dust collector is more and more, the load of the motor is larger and larger, the rotating speed of the motor is reduced, the vacuum degree of the dust collector is reduced, and the suction force is reduced gradually.
The invention can adjust the electromagnetic parameters through the controller, so that the rotor has enough magnetic tension in the axial direction and the radial direction, a groove is arranged on the axial magnetic bearing under the condition that only one axial magnetic bearing is arranged, a bulge accommodated in the groove is arranged on the periphery of the rotor shaft 11, and the axial deviation of the rotor can be limited through the matching of the groove and the bulge. Simple structure, saving elements and materials and reducing cost.
Preferably, in this embodiment, both the radial magnetic bearing and the axial magnetic bearing are made of metal materials, and preferably, high-performance metal materials can be used to reduce the volume of the bearing, reduce noise and improve the efficiency of the motor; meanwhile, the air duct is designed as a cooling air duct, and the bearing is cooled when the impeller 12 rotates, so that the service life of the bearing is prolonged.
Preferably, in the present embodiment, the radial position sensor is fixed to a dedicated fixing plate, and a high-precision positioning structure is provided on the fixing plate, so that the radial position sensor detects a small positional deviation of the rotor with high precision.
The motor of the dust collector is used as a brand-new brushless dust collector motor structure and is applied to the dust collector, so that the dust collector has the advantages of high rotating speed, large suction force, low noise and long service life.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (6)
1. A dust collector motor comprises a stator (6) and a rotor (7), and is characterized in that the dust collector motor is provided with a magnetic suspension bearing for suspending the rotor (7) in the stator (6), the rotor (7) comprises a rotor shaft (11), the magnetic suspension bearing comprises an upper axial magnetic bearing (3) which is arranged at one end of the rotor shaft (11) and is used for axially adjusting the position of the rotor shaft (11), a groove is formed in the upper axial magnetic bearing (3), the rotor shaft (11) is provided with a bulge accommodated in the groove, and the groove is matched with the bulge to limit the axial deviation of the rotor shaft (11); the motor of the dust collector is provided with a power supply for independently controlling the magnetic suspension bearing so as to supply power to a coil of the magnetic suspension bearing and can continuously supply power after the motor is powered off; the other end of the rotor shaft (11) is provided with an impeller (10), an air channel is a cooling air channel, and the impeller (10) cools a bearing when rotating;
an axial position sensor (2) is arranged at one end face of the rotor shaft (11) along the axial direction, and the upper axial magnetic bearing (3) is arranged at one side close to the axial position sensor (2);
the rotor (7) further comprises a rotor permanent magnet arranged on the rotor shaft (11), and the magnetic suspension bearing further comprises an upper radial magnetic bearing (5) and a lower radial magnetic bearing (8) which are respectively arranged on two sides of the rotor permanent magnet and used for radially adjusting the position of the rotor shaft (11);
the upper axial magnetic bearing (3) is positioned between the upper radial magnetic bearing (5) and the axial position sensor (2).
2. The motor for a vacuum cleaner of claim 1, wherein the protrusion is an annular shoulder or bushing and the recess is an annular groove.
3. The vacuum cleaner motor according to claim 1, wherein two of the radial magnetic bearings are arranged symmetrically centered on the rotor permanent magnet, respectively.
4. The vacuum cleaner motor according to claim 3, further comprising two radial position sensors for monitoring the position of the rotor shaft (11) in the radial direction, the radial position sensors being connected to a motor control board (1);
the two radial position sensors are respectively an upper radial position sensor (4) and a lower radial position sensor (9), the upper radial position sensor (4) corresponds to the upper radial magnetic bearing (5), and the lower radial position sensor (9) corresponds to the lower radial magnetic bearing (8).
5. The vacuum cleaner motor according to claim 4, wherein two of the radial magnetic bearings are disposed between the two radial position sensors and on either side of the rotor permanent magnet.
6. A vacuum cleaner having a vacuum cleaner motor as claimed in any one of claims 1 to 5, the vacuum cleaner motor comprising a controller which actively adjusts the speed of a rotor of the vacuum cleaner motor in dependence on the magnitude of a load in the vacuum cleaner.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734469.1A CN107516990B (en) | 2017-08-24 | 2017-08-24 | Dust collector motor and dust collector |
| PCT/CN2018/091618 WO2019037525A1 (en) | 2017-08-24 | 2018-06-15 | Vacuum cleaner motor and vacuum cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710734469.1A CN107516990B (en) | 2017-08-24 | 2017-08-24 | Dust collector motor and dust collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107516990A CN107516990A (en) | 2017-12-26 |
| CN107516990B true CN107516990B (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710734469.1A Active CN107516990B (en) | 2017-08-24 | 2017-08-24 | Dust collector motor and dust collector |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107516990B (en) |
| WO (1) | WO2019037525A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516990B (en) * | 2017-08-24 | 2021-09-14 | 莱克电气股份有限公司 | Dust collector motor and dust collector |
| CN107370322B (en) * | 2017-08-24 | 2021-12-07 | 莱克电气股份有限公司 | Dust collector motor and dust collector |
| CN110165824A (en) * | 2019-05-21 | 2019-08-23 | 深圳麦格动力技术有限公司 | Magnetic suspension motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040009157A (en) * | 2002-07-22 | 2004-01-31 | 삼성전기주식회사 | Motor having thrust magnetic bearing |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005003580A1 (en) * | 2003-07-04 | 2005-01-13 | Mitsubishi Denki Kabushiki Kaisha | Magnetic bearing device |
| US20080034532A1 (en) * | 2007-02-07 | 2008-02-14 | Tai-Her Yang | Off-load reduced input power energy saving low noise air vacuum cleaner |
| CN102437798A (en) * | 2011-10-19 | 2012-05-02 | 上海大学 | High speed electric spindle supported by all-permanent magnet bearing |
| 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 |
| CN105642462A (en) * | 2015-12-31 | 2016-06-08 | 天津嘉格机电有限公司 | Rotary atomizer based on magnetic bearings |
| CN106505780B (en) * | 2016-12-15 | 2024-03-26 | 南通金驰机电有限公司 | 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 |
| CN207354031U (en) * | 2017-08-24 | 2018-05-11 | 莱克电气股份有限公司 | A kind of motor of dust collector and dust catcher |
| CN107516990B (en) * | 2017-08-24 | 2021-09-14 | 莱克电气股份有限公司 | Dust collector motor and dust collector |
-
2017
- 2017-08-24 CN CN201710734469.1A patent/CN107516990B/en active Active
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2018
- 2018-06-15 WO PCT/CN2018/091618 patent/WO2019037525A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040009157A (en) * | 2002-07-22 | 2004-01-31 | 삼성전기주식회사 | Motor having thrust magnetic bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107516990A (en) | 2017-12-26 |
| WO2019037525A1 (en) | 2019-02-28 |
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