CN208316437U - Using the rotor structure for permanent magnet motor of magnetic conduction composite fibre sheath - Google Patents
Using the rotor structure for permanent magnet motor of magnetic conduction composite fibre sheath Download PDFInfo
- Publication number
- CN208316437U CN208316437U CN201820536430.9U CN201820536430U CN208316437U CN 208316437 U CN208316437 U CN 208316437U CN 201820536430 U CN201820536430 U CN 201820536430U CN 208316437 U CN208316437 U CN 208316437U
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- Prior art keywords
- permanent magnet
- sheath
- magnetic conduction
- composite fibre
- conduction composite
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Abstract
The utility model relates to a kind of rotor structure for permanent magnet motor using magnetic conduction composite fibre sheath, including axis, permanent magnet blocks, magnetic conduction composite fibre sheath, permanent magnet blocks circumferentially are evenly equipped with axial on the axis, the outer lock ring of permanent magnet blocks has magnetic conduction composite fibre sheath.The structure is using a kind of composite fibre sheath of magnetic conduction come the permanent magnet of fixed rotor, and the magnetic conductivity of the sheath is 2 ~ 5, and the adjustment of sheath magnetic conductivity is adjusted by the iron powder ratio of addition；Magnetic conduction sheath effectively reduces the magnetic resistance of sheath, increases air gap flux density, improves the output power of magneto；Between sheath and permanent magnet by the way of interference fit, even if guaranteeing in the case where running at high speed, sheath can also tightly wale permanent magnet and not separate with axis, ensure that good integraty.
Description
Technical field
The utility model relates to a kind of high-speed permanent magnet motor, especially a kind of rotor structure for permanent magnet motor.
Background technique
Current high speed rotor structure, as shown in Figure 1, mainly including axis 11, permanent magnet 12, sheath 13, mainstream technology
Are as follows:
Sheath 13 is using high-intensitive alloy, such as the non-magnetic alloy such as titanium alloy and Nickel-Based Steel, the disadvantage is that intensity
Only 1000Mpa or so, centrifugal force caused by unbearable more high linear speed, and stator harmonic field generate larger in sheath
Vortex, causes temperature rise excessively high and causes the permanent magnet degaussing being in contact with it；
Sheath is formed using the high strength fibres such as carbon fiber, glass fiber and resin compounded, has non-conductive, intensity height
The characteristics of, usual tensile strength is in 2000Mpa or more.The disadvantage is that sheath is non-magnetic also non-conductive, the harmonic wave of stator can not be shielded
Magnetic field causes eddy-current loss to concentrate on permanent magnet, along with the thermal coefficient of this kind of composite material is low, therefore also results in
Permanent magnet temperature rise is excessively high and demagnetizes.
Both sheaths are all non-magnetic simultaneously, and jacket thickness also can be regarded as magnetic circuit path, causes magnetic circuit reluctance very big, causes
Air gap flux density reduces, and according to electromagnetic principle, the size of air gap flux density is directly directly proportional to the torque of motor.
Summary of the invention
In order to solve traditional surface-mounted permanent magnet machine sheath it is non-magnetic caused by rotor magnetic can weak disadvantage, this is practical new
Type proposes a kind of rotor structure for permanent magnet motor using magnetic conduction composite fibre sheath, which uses a kind of composite fibre of magnetic conduction
Sheath carrys out the permanent magnet of fixed rotor, and the magnetic conductivity of the sheath is 2~5, the iron powder ratio that the adjustment of sheath magnetic conductivity passes through addition
Example adjusts；Magnetic conduction sheath effectively reduces the magnetic resistance of sheath, increases air gap flux density, improves the output work of magneto
Rate；Between sheath and permanent magnet by the way of interference fit, even if guaranteeing in the case where running at high speed, sheath can also be waled tightly
Permanent magnet is not separated with axis, ensure that good integraty.
To achieve the above object, the technical solution of the utility model is: a kind of permanent magnetism using magnetic conduction composite fibre sheath
Motor rotor construction, including axis, permanent magnet blocks, magnetic conduction composite fibre sheath are circumferentially evenly equipped with permanent magnetism with axial on the axis
Body block, the outer lock ring of permanent magnet blocks have magnetic conduction composite fibre sheath.
Circumferential uniform point 8 pieces along axis of the permanent magnet, along axial uniform 4 equal part.
The permanent magnet blocks are bonded on axis by glue.
The elasticity modulus of the magnetic conduction composite fibre sheath is 175Gpa, and Poisson's coefficient 0.36, tensile strength is
2000Mpa, density 2000kg/m3, and use T700 carbon fiber winding, relative permeability 5.
The permanent magnet is SmCo, elasticity modulus 108Gpa, Poisson's coefficient 0.24, density 8400kg/m3, resistance to compression
Intensity is 850Mpa, relative permeability 1.
The beneficial effects of the utility model are:
The utility model uses a kind of composite fibre sheath of magnetic conduction, and the composite fibre sheath is in winding manufacturing process
A certain proportion of magnetic conduction powder (iron, nickel) is added, making the control of its relative permeability 2~5, (magnetic conductivity is unobvious lower than 2 effects, magnetic
Conductance, which is higher than 5, will lead to apparent magnet short-cut path), so as to significantly reduce the magnetic circuit reluctance of sheath, air-gap field is enhanced,
The utilization rate of permanent-magnet material is effectively raised, while effectively shielding stator harmonic field, reduces it in rotor permanent magnet
On eddy-current loss, avoid the high temperature degaussing risk of permanent magnet.In addition, the addition of magnetic conductive metal powder, improves leading for sheath
Hot coefficient is conducive to the heat dissipation of rotor.
Detailed description of the invention
Fig. 1 is existing high speed rotor structural schematic diagram；
Fig. 2 is the rotor structure for permanent magnet motor cross-sectional view of the utility model；
Fig. 3 is the left cross-sectional view of Fig. 2.
Specific embodiment
The utility model is described in further detail with embodiment with reference to the accompanying drawing.
Such as Fig. 2, shown in 3, the rotor structure for permanent magnet motor using magnetic conduction composite fibre sheath of the utility model, including axis
1, permanent magnet blocks 2, magnetic conduction composite fibre sheath 3.
Arc-shaped permanent magnet blocks 2, the piecemeal along the axial and circumferential of bearing are to reduce eddy-current loss and reduction
The difficulty of processing of permanent magnet, piecemeal quantity is determines according to actual conditions.In the example, permanent magnet is circumferential uniformly to divide 8 pieces, axially uniformly
Divide 4 equal parts.Permanent magnet 2 can first magnetize, and can also entirely rotor be magnetized again by magnet charger after the assembly is completed.Permanent magnet blocks 2
It is adhered on axis 1 by glue, after the completion of permanent magnet 2 is bonded, surface will be ground smooth, and coat one layer of lubricating oil, then will
Magnetic conduction composite fibre sheath 3 is press-fit into place by press from left to right, and final magnetic conduction composite fibre sheath 3 is tightly by permanent magnet 2
It wales, ensure that be in high speed rotation, permanent magnet 2 will not be loosened with axis 1.Appearance after the grinding of permanent magnet 2
The magnitude of interference Δ of face and jacket inner surface is determining according to the revolving speed of rotor, in this embodiment:
The elasticity modulus 175Gpa of magnetic conduction composite fibre sheath 3, Poisson's coefficient 0.36, tensile strength 2000Mpa, density
2000kg/m3Using T700 carbon fiber winding, relative permeability 5, outer diameter 102mm, internal diameter 98mm, length 136mm；
Permanent magnet 2 is SmCo, elasticity modulus 108Gpa, Poisson's coefficient 0.24, density 8400kg/m3, compression strength
850Mpa, relative permeability 1, outer diameter 98mm+ Δ mm, internal diameter 81mm, monolithic length 34mm.Wherein Δ is magnitude of interference.
Axis 1 is No. 45 steel, elasticity modulus 200Gpa, tensile strength 600Mpa, Poisson's coefficient 0.3, density 7800kg/m3,
Outer diameter 81mm.
Rotor maximum speed 35000rpm, then can calculate corresponding magnitude of interference Δ=0.6mm, and sheath maximum stress is
1088Mpa, the compression that permanent magnet is received are 40Mpa, and be all satisfied material answers force request.
Claims (5)
1. a kind of rotor structure for permanent magnet motor using magnetic conduction composite fibre sheath, including axis, permanent magnet blocks, magnetic conduction composite fibre
Sheath, it is characterised in that: be circumferentially evenly equipped with permanent magnet blocks with axial on the axis, the outer lock ring of permanent magnet blocks has the compound fibre of magnetic conduction
Maintenance set；The magnetic conductivity of the magnetic conduction composite fibre sheath is 2~5.
2. the rotor structure for permanent magnet motor according to claim 1 using magnetic conduction composite fibre sheath, it is characterised in that: institute
Permanent magnet is stated circumferential uniform point 8 pieces along axis, along axial uniform 4 equal part.
3. the rotor structure for permanent magnet motor according to claim 1 using magnetic conduction composite fibre sheath, it is characterised in that: institute
Permanent magnet blocks are stated to be bonded on axis by glue.
4. the rotor structure for permanent magnet motor according to claim 1 using magnetic conduction composite fibre sheath, it is characterised in that: institute
The elasticity modulus for stating magnetic conduction composite fibre sheath is 175Gpa, and Poisson's coefficient 0.36, tensile strength 2000Mpa, density is
2000kg/m3, with T700 carbon fiber winding, relative permeability 5.
5. the rotor structure for permanent magnet motor according to claim 1 using magnetic conduction composite fibre sheath, it is characterised in that: institute
Stating permanent magnet is SmCo, elasticity modulus 108Gpa, Poisson's coefficient 0.24, density 8400kg/m3, compression strength is
850Mpa, relative permeability 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820536430.9U CN208316437U (en) | 2018-04-16 | 2018-04-16 | Using the rotor structure for permanent magnet motor of magnetic conduction composite fibre sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820536430.9U CN208316437U (en) | 2018-04-16 | 2018-04-16 | Using the rotor structure for permanent magnet motor of magnetic conduction composite fibre sheath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208316437U true CN208316437U (en) | 2019-01-01 |
Family
ID=64719709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820536430.9U Expired - Fee Related CN208316437U (en) | 2018-04-16 | 2018-04-16 | Using the rotor structure for permanent magnet motor of magnetic conduction composite fibre sheath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208316437U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115765346A (en) * | 2022-12-26 | 2023-03-07 | 南京炬锋动力科技有限公司 | High-tension binding and solidifying method for composite material sheath of high-speed permanent magnet motor rotor |
-
2018
- 2018-04-16 CN CN201820536430.9U patent/CN208316437U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115765346A (en) * | 2022-12-26 | 2023-03-07 | 南京炬锋动力科技有限公司 | High-tension binding and solidifying method for composite material sheath of high-speed permanent magnet motor rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190101 Termination date: 20210416 |