CN110957819A - Special-shaped magnetic shoe - Google Patents
Special-shaped magnetic shoe Download PDFInfo
- Publication number
- CN110957819A CN110957819A CN201911296830.2A CN201911296830A CN110957819A CN 110957819 A CN110957819 A CN 110957819A CN 201911296830 A CN201911296830 A CN 201911296830A CN 110957819 A CN110957819 A CN 110957819A
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- CN
- China
- Prior art keywords
- magnetic shoe
- shoe body
- arch
- magnetic
- arc surface
- 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.)
- Withdrawn
Links
- 230000004907 flux Effects 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
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
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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
- H02K1/17—Stator cores with permanent magnets
-
- 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
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a special-shaped magnetic shoe which comprises a magnetic shoe body, wherein the magnetic shoe body is of an arch structure, the circle center of an arch outer arc surface and the circle center of an arch inner arc surface of the magnetic shoe body are of an eccentric structure, the thickness from the middle part to the end part of the magnetic shoe body is gradually reduced, and the magnetic flux of the two sides of the magnetic shoe body, compared with the arch top of the middle part, is relatively gradually weakened. The magnetic shoe can effectively reduce the electromagnetic noise of the motor, and has reasonable structural design and good use effect.
Description
The technical field is as follows:
the invention relates to a special-shaped magnetic shoe.
Background art:
with the progress of society, people put forward higher and higher requirements and restrictions on the noise polluting the environment, and how to reduce the vibration and the noise of the motor, reduce the influence of the noise on the working and living environment of people and the harm of the noise to the health of people become problems which need to be solved urgently. The motor is particularly used for a blower motor of an automobile air conditioning system, and has higher requirements on the noise of the motor in order to improve the comfort of drivers and passengers.
Generally, motor noise can be broadly classified into three major categories, ① electromagnetic noise, ② mechanical noise, ③ aerodynamic noise, according to the different ways in which it is generated.
The invention content is as follows:
the invention provides a special-shaped magnetic shoe for solving the problems in the prior art.
The technical scheme adopted by the invention is as follows: the utility model provides a heterotypic magnetic shoe, includes the magnetic shoe body, the magnetic shoe body is the arch body structure, and the centre of a circle of the arch extrados of magnetic shoe body and the centre of a circle of intrados are eccentric structures, and the thickness of magnetic shoe body middle part to tip thins gradually to make the magnetic flow of magnetic shoe body both sides bottom than the middle part vault weaken gradually relatively.
Furthermore, the bottom surfaces of two ends of the inner arc surface in the magnetic shoe body are ground to form an inclined surface structure.
Furthermore, the central angle of the magnetic shoe body is 100-120 degrees.
The invention has the following beneficial effects: the magnetic shoe can effectively reduce the electromagnetic noise of the motor, and has reasonable structural design and good use effect.
Description of the drawings:
FIG. 1 is a block diagram of the present invention.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the special-shaped magnetic shoe of the present invention comprises a magnetic shoe body 10, wherein the magnetic shoe body 10 is an arch structure, the center of an arch outer arc surface and the center of an arch inner arc surface of the magnetic shoe body 10 are eccentric structures, and the thickness from the middle to the end of the magnetic shoe body 10 is gradually reduced, such that the magnetic flux at the bottom of the two sides of the magnetic shoe body 10, compared with the arch top of the middle, is relatively gradually reduced. The bottom surfaces of the two ends of the inner arc surface in the magnetic shoe body 10 are ground and form an inclined surface structure.
The shape of the magnetic shoe body 10 is a chamfer arch body, a chamfer face angle α between a chamfer face a and an end face b in the magnetic shoe body 10 is 120-140 degrees, β is 100-120 degrees, the arc outer arc face and the arc inner arc face of the chamfer arch body are not the same circle center, the radius R of the inner arc face is larger than the radius R of the outer arc face, the arch crown part in the middle of the permanent magnetic shoe body is thicker delta, and the magnetic shoe body is gradually thinned to the bottoms of two sides.
When the motor is in operation, an air gap magnetic field is arranged in an air gap between the stator and the rotor, electromagnetic noise of the direct current motor is mainly caused by deformation and vibration of interaction between parts of the motor caused by a harmonic magnetic field of an air gap magnetic flux field, tooth harmonic waves are generated due to the influence of tooth grooves, the frequency of the tooth harmonic waves is often in a multiple relation with the number of magnetic grooves, and harmonic magnetic flux generates noise with higher frequency. The arc-shaped outer arc surface and arc-shaped inner arc surface of the permanent magnet tile body are generally adopted as the same circle center, the whole thickness is basically the same, the generated approximately trapezoidal wave magnetic field generates the harmonic component of the magnetic potential, and the rotor generates the corresponding harmonic torque to become the component of the motor electromagnetic torque fluctuation. The vibration and noise caused by tooth harmonic wave are generated due to the influence of tooth grooves, the prior art adopts a chute method to weaken the vibration and noise, the generation of electromagnetic noise has various complicated reasons, and the suppression of the electromagnetic noise can be started from a plurality of aspects and technical measures. The invention adopts the arched permanent magnet tile body, the arc of the arched outer arc surface and the arc of the inner arc surface are not the same circle center, the radius of the inner arc surface is larger than that of the outer arc surface, the arch top part in the middle of the permanent magnet tile body is thicker, and the bottom parts at two sides are gradually thinned, so that the magnetic flux of the arch top at two sides of the permanent magnet tile body is relatively gradually weakened, the harmonic magnetic field is effectively reduced, the magnetic field distribution of the motor is closer to the sine wave, and the electromagnetic noise is effectively inhibited.
The invention adopts the magnetic shoe body 10 which is different from the common permanent magnet direct current motor, the magnetic shoe body 10 is characterized in that the shape is an arch, the chamfer angle α between the chamfer surface a and the end surface b of the magnetic shoe body is 120-140 degrees, β is 100-120 degrees, the radius R of the arch outer arc surface and the radius R of the inner arc surface of the magnetic shoe body 10 are not the same circle center, the vertical distance of the circle centers is h, and the radius of the inner arc surface is larger than that of the outer arc surface, the magnetic shoe body 10 is used as a magnetic potential source of the motor to generate magnetic flux, and the material adopts permanent magnetic ferrite, therefore, the magnetic shoe body 10 adopted by the embodiment can effectively reduce electromagnetic noise.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (3)
1. A heterotypic magnetic shoe, its characterized in that: including magnetic shoe body (10), magnetic shoe body (10) are the arch body structure, and the centre of a circle of the arch extrados of magnetic shoe body (10) and the centre of a circle of intrados are eccentric structure, and the thickness of magnetic shoe body (10) middle part to tip thins gradually to make the magnetic flux of the more middle part vault in magnetic shoe body (10) both sides bottom weaken gradually relatively.
2. The profile magnetic shoe as claimed in claim 1, wherein: the bottom surfaces of two ends of the inner arc surface in the magnetic shoe body (10) are ground to form an inclined surface structure.
3. The profile magnetic shoe as claimed in claim 1, wherein: the central angle of the magnetic shoe body (10) is 100-120 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911296830.2A CN110957819A (en) | 2019-12-16 | 2019-12-16 | Special-shaped magnetic shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911296830.2A CN110957819A (en) | 2019-12-16 | 2019-12-16 | Special-shaped magnetic shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110957819A true CN110957819A (en) | 2020-04-03 |
Family
ID=69982087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911296830.2A Withdrawn CN110957819A (en) | 2019-12-16 | 2019-12-16 | Special-shaped magnetic shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110957819A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022041570A1 (en) * | 2020-08-24 | 2022-03-03 | 深圳市大疆创新科技有限公司 | Magnetic member, electric motor and movable platform |
| CN115664064A (en) * | 2022-12-26 | 2023-01-31 | 常州市凯迪电器股份有限公司 | Lifting upright post using permanent magnet direct current motor |
-
2019
- 2019-12-16 CN CN201911296830.2A patent/CN110957819A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022041570A1 (en) * | 2020-08-24 | 2022-03-03 | 深圳市大疆创新科技有限公司 | Magnetic member, electric motor and movable platform |
| CN115664064A (en) * | 2022-12-26 | 2023-01-31 | 常州市凯迪电器股份有限公司 | Lifting upright post using permanent magnet direct current motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200403 |
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| WW01 | Invention patent application withdrawn after publication |