CN110635586A - Motor with low magnetic resistance - Google Patents
Motor with low magnetic resistance Download PDFInfo
- Publication number
- CN110635586A CN110635586A CN201910845511.6A CN201910845511A CN110635586A CN 110635586 A CN110635586 A CN 110635586A CN 201910845511 A CN201910845511 A CN 201910845511A CN 110635586 A CN110635586 A CN 110635586A
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- CN
- China
- Prior art keywords
- rotor
- motor
- rotating shaft
- stator
- motor shell
- Prior art date
- 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.)
- Pending
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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- 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
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
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- 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
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
-
- 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
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Synchronous Machinery (AREA)
Abstract
The invention relates to a low-reluctance motor, and belongs to the technical field of motors. The magnetorheological fluid generator comprises a rotor and a stator, wherein the rotor and the stator are arranged at intervals of an air gap, and magnetorheological fluid is filled in the air gap; the rotating speed of the rotor is less than or equal to 500 r/min; the motor also comprises a motor shell, wherein a rotor and a stator are hermetically arranged in the motor shell, and the rotor rotates around the axis of the rotor; the motor also comprises a rotating shaft, one end of the rotating shaft is positioned in the motor shell, the other end of the rotating shaft is exposed out of the motor shell, the rotor is coaxially arranged on the rotating shaft, and the rotating shaft rotates along with the rotor; the invention replaces the air with low magnetic conductivity between the stator and the rotor with the magnetorheological fluid with high magnetic conductivity, thereby reducing the magnetic circuit reluctance of the motor.
Description
Technical Field
The invention belongs to the technical field of motors, and relates to a low-reluctance motor.
Background
The magnetic circuit of the motor is a closed path of magnetic induction lines, the magnetic induction lines mostly link the stator and the rotor at the same time, and the path is a main magnetic circuit. The main magnetic circuit is connected with the stator iron core, the stator and rotor air gap, the rotor iron core and the permanent magnet. The magnetic resistance is inversely proportional to the magnetic conductivity of the material, so the magnetic circuit part of the motor mostly adopts the material with better magnetic conductivity (such as silicon steel sheets of a stator and a rotor). The stator and rotor air-gap magnetic field of the motor is a medium for coupling the stator magnetic field and the rotor magnetic field, and simultaneously, the stator and rotor air-gap is a part with larger magnetic resistance in a magnetic circuit of the motor due to small magnetic conductivity of air. In order to reduce the magnetic resistance of the magnetic circuit of the motor, the traditional mode is mainly started from two aspects of improving the magnetic permeability of the stator and rotor materials and reducing the stator and rotor gaps.
However, the magnetic permeability of the air in the stator and rotor gaps is far less than that of the magnetic permeability material, so that the magnetic resistance of the motor magnetic circuit is still mainly influenced by the air medium. The magnetic permeability of the magnetic conductive medium (such as silicon steel) used in the stator and rotor magnetic path part is far greater than that of air, and is thousands or even tens of thousands times of that of the air, so that the contribution of further improving the magnetic permeability of the medium to reducing the magnetic resistance is small.
The reduction of the stator and rotor gaps is a common means for reducing the magnetic circuit reluctance, the stator and rotor gaps inevitably exist due to the static and dynamic working characteristics of the motor stator, and the air with low magnetic permeability in the gaps is the main contribution of the motor reluctance.
Disclosure of Invention
In view of the above, the present invention provides a low reluctance motor, which reduces the reluctance between the stator and the rotor of the motor.
In order to achieve the purpose, the invention provides the following technical scheme: a motor with low magnetic resistance comprises a rotor and a stator, wherein the rotor and the stator are arranged at intervals of an air gap, and magnetorheological fluid is filled in the air gap.
Optionally, the rotating speed of the rotor is less than or equal to 500 r/min.
Optionally, the motor further comprises a motor housing, the rotor and the stator are hermetically arranged in the motor housing, and the rotor rotates around the axis of the rotor.
Optionally, the motor further comprises a rotating shaft, one end of the rotating shaft is located in the motor housing, the other end of the rotating shaft is exposed out of the motor housing, the rotor is coaxially arranged on the rotating shaft, and the rotating shaft rotates along with the rotor;
optionally, the rotating shaft is rotatably connected to the motor housing, a sealing ring is arranged between the rotating shaft and the motor housing, and the rotating shaft is sealed and rotated in the sealing ring.
The invention has the beneficial effects that: the invention replaces the air with low magnetic conductivity between the stator and the rotor with the magnetorheological fluid with high magnetic conductivity, thereby reducing the magnetic circuit reluctance of the motor.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic axial cross-sectional view of a low reluctance electric machine;
fig. 2 is a schematic view of a cross-sectional structure of a low reluctance motor in the direction B-B.
Reference numerals: the magnetic-rheological fluid generator comprises a motor shell 1, a rotor 2, a stator 3, a motor winding 4, magnetorheological fluid 5, a sealing ring 6 and a deep groove ball bearing 7.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Referring to fig. 1-2, a low reluctance motor includes a rotor 2 and a stator 3, the rotor 2 and the stator 3 are disposed with an air gap therebetween, and the air gap is filled with a magnetorheological fluid 5.
In the embodiment, the rotating speed of the rotor 2 is less than or equal to 500 r/min. Still include motor housing 1, rotor 2 and stator 3 seal arrangement are in motor housing 1, and rotor 2 rotates around its axis. The motor is characterized by further comprising a rotating shaft, wherein one end of the rotating shaft is positioned in the motor shell 1, the other end of the rotating shaft is exposed out of the motor shell 1, the rotor 2 is coaxially arranged on the rotating shaft, and the rotating shaft rotates along with the rotor 2; the rotation axis rotates and connects on motor housing 1, is provided with sealing washer 6 between rotation axis and the motor housing 1, and the rotation axis rotates in sealing washer 6 is sealed. In the embodiment, the motor further comprises a motor winding 4, the motor winding 4 is arranged on the rotor 2, and the motor winding 4 rotates along with the rotor 2. A deep groove ball bearing 7 is further arranged between the rotating shaft and the motor shell 1, and the rotating shaft rotates in the deep groove ball bearing 7.
During practical use, the rotor 2 and the stator 3 are arranged at intervals of an air gap, magnetorheological fluid 5 is filled in the air gap, the magnetic conductivity of the magnetorheological fluid 5 is far higher than that of air, and under the condition that the magnetic circuit structures of the motor are the same, the magnetorheological fluid replaces air to serve as a magnetic conduction medium between the rotor 2 and the stator 3, so that the magnetic resistance of the motor is effectively reduced, and the torque of the motor is improved.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention. Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (5)
1. The utility model provides a motor of low reluctance, includes rotor and stator, its characterized in that: the rotor and the stator are arranged at intervals of an air gap, and magnetorheological fluid is filled in the air gap.
2. A low reluctance machine according to claim 1, wherein: the rotating speed of the rotor is less than or equal to 500 r/min.
3. A low reluctance machine according to claim 1, wherein: the motor is characterized by further comprising a motor shell, the rotor and the stator are arranged in the motor shell in a sealing mode, and the rotor rotates around the axis of the rotor.
4. A low reluctance machine according to claim 3, wherein: the motor is characterized by further comprising a rotating shaft, one end of the rotating shaft is located in the motor shell, the other end of the rotating shaft is exposed out of the motor shell, the rotor is coaxially arranged on the rotating shaft, and the rotating shaft rotates along with the rotor.
5. A low reluctance machine according to claim 4, wherein: the rotating shaft is rotatably connected to the motor shell, a sealing ring is arranged between the rotating shaft and the motor shell, and the rotating shaft is in sealed rotation in the sealing ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018113331157 | 2018-11-09 | ||
| CN201811333115.7A CN109462295A (en) | 2018-11-09 | 2018-11-09 | Stepper motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110635586A true CN110635586A (en) | 2019-12-31 |
Family
ID=65609932
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811333115.7A Pending CN109462295A (en) | 2018-11-09 | 2018-11-09 | Stepper motor |
| CN201910845511.6A Pending CN110635586A (en) | 2018-11-09 | 2019-09-06 | Motor with low magnetic resistance |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811333115.7A Pending CN109462295A (en) | 2018-11-09 | 2018-11-09 | Stepper motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN109462295A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332582A (en) * | 2020-10-21 | 2021-02-05 | 屠葳 | Anti-falling stone motor based on magnetorheological fluid |
| CN113852220A (en) * | 2020-06-28 | 2021-12-28 | 广东美的生活电器制造有限公司 | Motor and food processor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889010A (en) * | 2019-04-26 | 2019-06-14 | 南通森玛特电机有限公司 | A kind of encapsulating structure on three-phase stepper motor |
| CN110247503B (en) * | 2019-06-19 | 2020-09-11 | 菲斯达排放控制装置（苏州）有限公司 | Sealing structure for electronic actuator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826760A (en) * | 2008-12-31 | 2010-09-08 | 普拉德研究及开发股份有限公司 | Submersible motor with ferrofluid gap |
| CN102252095A (en) * | 2010-05-18 | 2011-11-23 | 沈阳优力机电设备有限公司 | Seal method of magnetorheological fluid for elevator magnetorheological fluid brake and seal device |
| CN103016602A (en) * | 2012-12-10 | 2013-04-03 | 重庆大学 | Magneto-rheological torsion damper |
| DE102012017805A1 (en) * | 2012-09-10 | 2014-03-13 | Christian Funke | Sealing device for use in synchronous and asynchronous motors, has set of pole shoes that is arranged with permanent magnet, magnetorheological medium, insulator, shielding, insulating layer and sealing counterpart |
| CN105626755A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Small rotary type magneto-rheological fluid damper used for reproducing passive force sense |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62185544A (en) * | 1986-02-07 | 1987-08-13 | Shin Meiwa Ind Co Ltd | Direct drive motor |
| JP2013215022A (en) * | 2012-03-31 | 2013-10-17 | Daihatsu Motor Co Ltd | Motor |
| CN205829438U (en) * | 2016-06-07 | 2016-12-21 | 戴震成 | There is the motor of longer life |
| CN207018533U (en) * | 2017-07-13 | 2018-02-16 | 苏州纳思特精密机械有限公司 | Sealing ring |
| CN207083000U (en) * | 2017-08-20 | 2018-03-09 | 东莞市景珑电机有限公司 | The rotor and stepper motor of stepper motor |
| CN207083002U (en) * | 2017-08-20 | 2018-03-09 | 东莞市景珑电机有限公司 | The stator and stepper motor of stepper motor |
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2018
- 2018-11-09 CN CN201811333115.7A patent/CN109462295A/en active Pending
-
2019
- 2019-09-06 CN CN201910845511.6A patent/CN110635586A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826760A (en) * | 2008-12-31 | 2010-09-08 | 普拉德研究及开发股份有限公司 | Submersible motor with ferrofluid gap |
| CN102252095A (en) * | 2010-05-18 | 2011-11-23 | 沈阳优力机电设备有限公司 | Seal method of magnetorheological fluid for elevator magnetorheological fluid brake and seal device |
| DE102012017805A1 (en) * | 2012-09-10 | 2014-03-13 | Christian Funke | Sealing device for use in synchronous and asynchronous motors, has set of pole shoes that is arranged with permanent magnet, magnetorheological medium, insulator, shielding, insulating layer and sealing counterpart |
| CN103016602A (en) * | 2012-12-10 | 2013-04-03 | 重庆大学 | Magneto-rheological torsion damper |
| CN105626755A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Small rotary type magneto-rheological fluid damper used for reproducing passive force sense |
Non-Patent Citations (1)
| Title |
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| 李正著: "《永磁电机的设计》", 29 February 2016 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852220A (en) * | 2020-06-28 | 2021-12-28 | 广东美的生活电器制造有限公司 | Motor and food processor |
| CN112332582A (en) * | 2020-10-21 | 2021-02-05 | 屠葳 | Anti-falling stone motor based on magnetorheological fluid |
| CN112332582B (en) * | 2020-10-21 | 2021-11-30 | 嘉兴久珥科技有限公司 | Anti-falling stone motor based on magnetorheological fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109462295A (en) | 2019-03-12 |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191231 |
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| RJ01 | Rejection of invention patent application after publication |