CN101572450A - Inner rotor type motor - Google Patents
Inner rotor type motor Download PDFInfo
- Publication number
- CN101572450A CN101572450A CNA2008100529679A CN200810052967A CN101572450A CN 101572450 A CN101572450 A CN 101572450A CN A2008100529679 A CNA2008100529679 A CN A2008100529679A CN 200810052967 A CN200810052967 A CN 200810052967A CN 101572450 A CN101572450 A CN 101572450A
- Authority
- CN
- China
- Prior art keywords
- magnet
- rotor
- type motor
- inner rotor
- rotor core
- 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
Links
Images
Abstract
The invention discloses an inner rotor type motor which comprises a stator and a rotor. The rotor comprises a rotating shaft, a rotor iron core and a magnet; a hanging protrusion is projectively formed on the outer periphery of the rotor iron core, a groove in which the magnet is inserted is formed at the inner side of the hanging protrusion, and the magnet is arranged on the outer periphery of the rotor iron core. The invention has the advantages that the magnet is fixed by the hanging protrusion formed on the rotor iron core so as to prevent the magnet from separating from the rotor iron core, the magnet is made from a neodymium material so as to improve the performance of the magnet, and the middle of the magnet is thicker than either side of the magnet so as to enhance the strength and save materials.
Description
Technical field
The present invention relates to a kind of motor, particularly relate to a kind of inner rotor type motor of strengthening rotor strength.
Background technology
Usually, motor is meant electric energy is converted to mechanical energy, obtains the device of power.This motor can be divided into rotor usually and be positioned at inner inner rotor type motor, and the external rotor electric machine that externally rotates of rotor.Now to be applicable to that the BLDC motor that magnet sticks in the inner rotor type motor of rotor periphery is that example describes.
Usually, BLDC motor (brushless DC motor) by 2 phases, 3 mutually or the stator of 4 phase electric machine windings and forms with permanent magnet, and the rotor of commutatorless composition, the BLDC motor is used widely as the motor of variable speed drive.Particularly, because the abundance of permanent magnetic material is used as servo-driver (servo drive), its field and scope that is suitable for enlarges just gradually recently.
Described BLDC motor comprises by the stator coil that produces rotating magnetic field, and by forming the stator that stator core that magnetic flux path makes the smooth and easy formation magnetic circuit of described magnetic flux constitutes, and the rotor that is made of rotor core and permanent magnet.
The drive principle of described BLDC motor is as follows: the stator coil energising that constitutes to 3 phase coils produces rotating magnetic field, and in the magnetic flux interaction of described rotating magnetic field and permanent magnet, rotor produces torque by certain direction rotation.
Fig. 1 is the inner rotor type motor rotor schematic appearance of prior art.
As shown in Figure 1, existing inner-rotor-type BLDC motor rotor construction is described.
Rotor comprises the rotating shaft 1 of passing on revolving force, is pressed in described rotating shaft 1 and rotating shaft one rotor rotated iron core 2, sticks on the magnet 3 of described rotor core 2 peripheral surface; Described magnet 3 is arranged in the mode that N, the S utmost point replace.
There is following shortcoming in above-mentioned inner rotor motor: because magnet 3 materials are limited by Ferrite Material, electric efficiency is lower, material that therefore need be stronger than ferrimagnetism; The N of magnet 3, S be closely contact extremely mutually, and commutation torque pulsation meeting is very big when rotor rotates; Magnet 3 sticks on the outer peripheral face of rotor by bonding agent, because the centrifugal action during the rotor rotation, bonding agent comes off easily when using for a long time; The thickness of magnet 3 is certain, and its shock resistance is not good enough.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides a kind of magnet that prevents to break away from the inner rotor type motor that can improve electric efficiency again.
The technical solution adopted in the present invention is: a kind of inner rotor type motor comprises: stator and rotor; Described rotor comprises rotating shaft, rotor core and magnet; The outer peripheral face of described rotor core is formed with highlightedly and articulates projection; Be formed with the groove that inserts magnet in the described inboard that articulates projection, described magnet is arranged on the outer peripheral face of described rotor core.
Described magnet is divided into N, and N is the positive integer greater than 2.
The center thickness of described magnet is greater than the thickness of the left and right sides.
Both-side ends at described magnet makes progress, and is provided with and articulates projection.
The material of described magnet is a neodymium.
The described projection that articulates is circular shape.
A kind of inner rotor type motor comprises: stator and having changeed; Described rotor comprises rotating shaft, rotor core and magnet; The outer peripheral face of described rotor core is formed with M highlightedly and articulates projection; Described magnet produces magnetic flux, and magnet is divided into M, is inserted in described articulating in the protruding inner side slot respectively, and described magnet is arranged on the outer peripheral face of described rotor core, and M is the positive integer greater than 2.
Described magnet sticks on the outer peripheral face of rotor core by bonding agent.
The invention has the beneficial effects as follows: the protruding fixed magnets that articulates owing to forming on rotor core can prevent that magnet breaks away from from rotor core; By neodymium material magnet, can improve the performance of magnet; The magnet interior thickness is greater than the thickness of its side, and this structure can be strengthened intensity, reduces material.
Description of drawings
Fig. 1 is the inner rotor type motor rotor schematic appearance of prior art;
Fig. 2 is the inner rotor type motor rotor schematic appearance of the present invention the 1st embodiment;
Fig. 3 is the inner rotor type motor rotor structure schematic cross section of the present invention the 1st embodiment;
Fig. 4 is the inner rotor type motor rotor structure schematic cross section of the present invention the 2nd embodiment.
Among the figure:
10: rotating shaft 20: rotor core
21: articulate projection 22: groove
30: magnet
Embodiment
Below, with embodiment the present invention is described in further detail in conjunction with the accompanying drawings.
Fig. 2 is the inner rotor type motor schematic appearance of the present invention the 1st embodiment; Fig. 3 is the inner rotor type motor rotor structure schematic cross section of the present invention the 1st embodiment.
As shown in Figures 2 and 3, the inner rotor type motor structure to the present invention the 1st embodiment describes.
Rotor is pressed into the rotor core 20 of described rotating shaft by the rotating shaft 10 of passing on power, and the magnet 30 that sticks on the outer peripheral face of described rotor core 20 constitutes.
Be formed with highlightedly at the outer peripheral face of described rotor core 20 and articulate projection 21; Be formed with the groove 22 that inserts magnet 30 in the described inboard that articulates projection 21; Described installation site when articulating projection 21 bootable stickup magnets 30, and can be used for fixing described magnet 30 prevents from that magnet 30 is long-term to use because the vibration that the centrifugal force that the rotor rotation produces, motor produce and from coming off that the impulsive force of outside takes place.
In addition, describedly articulate the lower end that projection 21 is positioned at two magnets 30.When the distance between described two grooves 22 is consistent with magnet 30 outer peripheral face length, describedly articulate projection 21 also has an accurate location when fixed magnets 30 effect.But,, therefore to remain with the tolerance that can in the process of magnetizing, ignore because can there be error in the length of described magnet 30 and the width of groove 22.
In order to make the described magnet that projection 21 supports the centrifugal force that produces by circumferencial direction when rotated with respect to motor that articulates, the described projection 21 that articulates preferably has circular shape.
In addition, the width of described groove 22 is advisable greater than magnet 30 lateral thickness; The width of described groove 22 preferably with the consistency of thickness of magnet 30, but because described rotor core 20 is metals, and magnet 30 is hard materials such as ferrite, therefore will be difficult to assemble during less than described magnet 30 thickness when the width of described groove 22.
Described groove 22 preferably is parallel to the length direction of rotating shaft 10.If the groove of stating 22 has curve shape, then only touch at specific point with the thickness of magnet 30, the centrifugal force that produces when rotor rotate is just only accepted by described specified point, therefore with specified point for producing the power that will allow magnet 30 rotate.Though on the outer peripheral face of iron core, magnet may separate with rotor core described magnet 30 in the time of will allowing the power of magnet 30 rotation if bear for a long time by adhesive securement.
If described groove 22 forms vertically with the structure parallel with rotating shaft 10, then described groove 22 contacts with the thickness of magnet 30 in whole length range, the centrifugal force that can dispersion rotor produces during rotation, described magnet 30 can reduce from the possibility that rotor core 20 separates.
Though described magnet 30 can alternately form magnetic pole on a main body, but torque pulsation is excessive when being close together owing to different magnetic pole, therefore in order to reduce torque pulsation, cut apart described magnet 30, mutually across a certain distance, preferably several magnets 30 are sticked on the rotor core between each magnet 30.At this moment, the spacing between the described magnet 30 is by articulating projection 21 constraints.In the prior art, magnet all will determine the position of each magnet 30 and the interval between each magnet 30 at every turn when installing, the present invention efficiently solves the position of magnet 30 and the distance between the magnet, only needs by being formed on articulating projection 21 and can determine the installation site of magnet and the distance between the magnet on the described rotor core 20.
Described magnet 30, the radius of curvature R 1 best radius of curvature R 2 of its lateral surface less than medial surface.As shown in Figure 3, described magnet 30 have central authorities thick, about thin shape; The shape of described magnet 30 is of value to strengthens its intensity, if the thickness of magnet 30 evenly is easy to fracture when being subjected to impulsive force.Thereby end was thin more about the thickness of magnet 30 should guarantee to arrive more.If the motor torque that rotor presents behind the bonding circular magnet is a square wave, what motor torque then of the present invention presented is sine curve, can reduce torque pulsation in the prior art.
The material of described magnet 30 is preferably selected neodymium (Nd) material for use; Described neodymium is stronger than ferritic magnetic as magnet material, can improve the torque of motor, but its shortcoming is the price height.And when using the neodymium material as magnet 30, can improve electric efficiency,, make the thickness of magnet 30 same as the prior art at middle body for reducing manufacturing expense the present invention by changing magnet shape, thin more during the closer to the magnet both sides, thus reach the purpose of reduction expense.
Outer peripheral face at rotor core 20 applies bonding agent, magnet 30 is embedded in the described groove 22 again, and magnet 30 is closely contacted on rotor core 20, with this magnet 30 is bonded on the rotor core 20.After each magnet sticks on the rotor periphery face in the prior art, for prevent about described each magnet, about or forwards tilt, need fix each magnet by anchor clamps, till adhesive hardens; But in the present invention, as long as described magnet 30 is embedded in the groove 22, can prevent magnet to the left and right or the place ahead tilt, only need get final product in the weight of the lower end of magnet 30 support magnet 30; Thereby can easily carry out the sticking operation of magnet 30.
Fig. 4 is the inner rotor type motor rotor structure schematic cross section of the present invention the 2nd embodiment.
Below, the inner rotor type motor rotor structure of the present invention the 2nd embodiment is described.
As shown in Figure 4, the rotor core of inner rotor type motor, its shape is identical with the 1st embodiment.At the two sides of described magnet 130 end, be formed with recess; The female portion is made of interior side rib and outer ribs, and preferably the interior side rib of the female portion is longer than outer ribs.
After described magnet 130 was inserted into groove 122, described interior side rib was docked at the most inboard face of groove 122, and described outer ribs is docked a part with the described projection 121 that articulates.
Described articulate the projection 121 or described magnet 130 in casting process, can produce the error of apparent size.As previously mentioned,, therefore only allow the negative sense error, stop to occur positive error because the thickness of described magnet 130 sides is identical with the width of groove 122.
Therefore, described magnet 130, its interior side rib docks with the medial surface of groove 122, outer ribs is docked the centrifugal force that contends with when rotated and produce from rotor core 120 with articulating projection 121.Therefore, described magnet 130 is also supported by side rib in described and outer ribs except the bonding force of bonding agent, can form triple supporting constructions.
In the present embodiment, not only can strengthen intensity, reduce the material cost of magnet, and can also prevent that magnet breaks away from, effect is better than the 1st embodiment.
It is worthy of note; protection scope of the present invention is not limited to described instantiation mode, and according to basic fundamental design of the present invention, those of ordinary skills need not through creative work; the execution mode that can associate all belongs to protection scope of the present invention.
Claims (8)
1. an inner rotor type motor comprises: stator and rotor; It is characterized in that: described rotor comprises rotating shaft, rotor core and magnet; The outer peripheral face of described rotor core is formed with highlightedly and articulates projection; Be formed with the groove that inserts magnet in the described inboard that articulates projection, described magnet is arranged on the outer peripheral face of described rotor core.
2. inner rotor type motor according to claim 1 is characterized in that: described magnet is divided into N, and N is the positive integer greater than 2.
3. inner rotor type motor according to claim 2 is characterized in that: the center thickness of described magnet is greater than the thickness of the left and right sides.
4. inner rotor type motor according to claim 3 is characterized in that: the both-side ends at described magnet makes progress, and is provided with and articulates projection.
5. inner rotor type motor according to claim 1 is characterized in that: the material of described magnet is a neodymium.
6. inner rotor type motor according to claim 1 is characterized in that: the described projection that articulates is circular shape.
7. inner rotor type motor comprises: stator and having changeed; It is characterized in that: described rotor comprises rotating shaft, rotor core and magnet; The outer peripheral face of described rotor core is formed with M highlightedly and articulates projection; Described magnet produces magnetic flux, and magnet is divided into M, is inserted in described articulating in the protruding inner side slot respectively, and described magnet is arranged on the outer peripheral face of described rotor core, and M is the positive integer greater than 2.
8. inner rotor type motor according to claim 7 is characterized in that: described magnet sticks on the outer peripheral face of rotor core by bonding agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100529679A CN101572450A (en) | 2008-04-30 | 2008-04-30 | Inner rotor type motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100529679A CN101572450A (en) | 2008-04-30 | 2008-04-30 | Inner rotor type motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101572450A true CN101572450A (en) | 2009-11-04 |
Family
ID=41231712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100529679A Pending CN101572450A (en) | 2008-04-30 | 2008-04-30 | Inner rotor type motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101572450A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018227479A1 (en) * | 2017-06-15 | 2018-12-20 | Envision Energy (Jiangsu) Co., Ltd. | Magnet pole for electric generator |
| CN109217600A (en) * | 2017-07-06 | 2019-01-15 | 三花亚威科电器设备（芜湖）有限公司 | For the oblique pole magnetic shoe of motor and with its rotor and motor |
| CN111697725A (en) * | 2020-06-24 | 2020-09-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor of motor and motor |
-
2008
- 2008-04-30 CN CNA2008100529679A patent/CN101572450A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018227479A1 (en) * | 2017-06-15 | 2018-12-20 | Envision Energy (Jiangsu) Co., Ltd. | Magnet pole for electric generator |
| CN110870167A (en) * | 2017-06-15 | 2020-03-06 | 远景能源有限公司 | Magnet pole for generator |
| CN109217600A (en) * | 2017-07-06 | 2019-01-15 | 三花亚威科电器设备（芜湖）有限公司 | For the oblique pole magnetic shoe of motor and with its rotor and motor |
| CN111697725A (en) * | 2020-06-24 | 2020-09-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor of motor and motor |
| CN111697725B (en) * | 2020-06-24 | 2021-11-26 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor of motor and motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6828723B2 (en) | Magnet manufacturing method | |
| CN201286055Y (en) | Salient pole permanent magnet synchronous motor | |
| US10069357B2 (en) | Spoke permanent magnet rotor | |
| CN102629811B (en) | Brushless direct current motor | |
| CN102255460A (en) | Permanent magnet synchronous machine (PMSM) possessing assembled magnetic effect | |
| CN105656270A (en) | Low-cost jet-moulded embedded permeant magnet motor for electric-assited steering system | |
| CN101572450A (en) | Inner rotor type motor | |
| CN103986255A (en) | Switched reluctance motor and rotor thereof | |
| CN202798218U (en) | High-speed permanent-magnet synchronous motor | |
| JP2001128395A (en) | Dynamo-electric machinery, compressor and manufacture of the dynamo-electric machinery | |
| KR20060045356A (en) | Rotor of motor | |
| JPH1189133A (en) | Permanent magnet type motor | |
| CN210201572U (en) | Rotor structure and rotor assembly of surface-mounted permanent magnet synchronous motor | |
| JP2007143331A (en) | Permanent-magnet-embedded rotor | |
| CN203617804U (en) | Permanent magnetic switch flux linkage motor and compressor provided with same | |
| CN102347669A (en) | Limited angle torque motor and method for manufacturing same | |
| CN103066722A (en) | High speed switch reluctance motor rotor with soft magnetic materials | |
| CN105262259A (en) | Permanent magnet motor rotor with nonuniform-distribution magnetic poles | |
| CN200987088Y (en) | Motor rotor structure | |
| CN203027044U (en) | Compressor and permanent magnet motor rotor device for compressor | |
| JP2000069717A (en) | Motor | |
| CN101345442B (en) | Rotor of electric motor used for compressor | |
| KR102461471B1 (en) | motor | |
| CN101588098A (en) | Inner rotor type motor | |
| JP2010166661A (en) | Rotary electric machine, driving method for rotary electric machine, and compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20091104 |