CN208257529U - A kind of high speed permanent magnet motor rotor structure with composite jacket - Google Patents
A kind of high speed permanent magnet motor rotor structure with composite jacket Download PDFInfo
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- CN208257529U CN208257529U CN201820642504.7U CN201820642504U CN208257529U CN 208257529 U CN208257529 U CN 208257529U CN 201820642504 U CN201820642504 U CN 201820642504U CN 208257529 U CN208257529 U CN 208257529U
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Abstract
The high speed permanent magnet motor rotor structure with composite jacket that the utility model discloses a kind of, including axis, rotor, permanent magnet and composite jacket, permanent magnet are tightly attached to rotor surface；Composite jacket includes: collection thermosphere, non metallic sheath ring, heat-conducting layer and heat dissipating layer, and collection thermosphere is located at the innermost layer of sheath, wraps up permanent magnet；Non metallic sheath ring with heat-conducting layer is axially spaced surrounds outside collection thermosphere；The heat dissipating layer is wrapped in the outer surface of non metallic sheath ring and heat-conducting layer.It using the utility model, solves common rotor structure and has the problems such as bad mechanical strength, eddy-current loss are big or radiating condition is poor, reduce the fever and temperature rise of rotor on the basis of guaranteeing that rotor mechanical strength is enough, improve the operational reliability of high-speed permanent magnet motor.
Description
Technical field
The utility model belongs to technical field of motors, and in particular to a kind of high speed permanent magnet motor rotor knot with composite jacket
Structure.
Background technique
Motor is the important component in industrial system, and the motor haveing excellent performance is heavy to closing for industrial system
It wants.High-speed motor has the advantages that power density is high, can directly drive high speed compared to general revolving speed motor and loads.High-speed permanent magnetic electricity
Machine also has high efficiency, High Power Factor while having many advantages, such as high-speed motor, thus with wide before
Scape.
Surface-mount type high-speed permanent magnet motor needs outside it since the mechanical strength of permanent magnet is insufficient plus wraps up in one layer of rotor jacket
Permanent magnet flies out or fragmentation when preventing operation.Therefore the rotor from-inner-to-outer of surface-mount type high-speed permanent magnet motor generally comprises shaft
With rotor core, permanent magnet, rotor jacket three-decker, as shown in Figure 1.
Not only fundamental frequency is high for stator current in high-speed motor, but also because inverter switching frequency is limited, harmonic content is high.Stator
The magnetic field relative rotor asynchronous rotation that current harmonics generates will lead to rotor field fluctuation, rotor eddy current loss caused to generate heat,
It is especially serious when high-speed cruising.And high speed rotor of motor is nearly at confined space, radiating condition is poor, and fever can cause significantly
Rotor temperature rise.Rotor overheat easily leads to the irreversible loss of excitation of permanent magnet, it is therefore desirable to be paid attention to and be solved.
Rotor jacket is generally divided into conductive metal material and two kinds of nonconducting nonmetallic materials.When rotor jacket uses
When metal material, since its thermal conductivity is good, rotor good heat dissipation effect, but due to its conductivity height, eddy-current loss therein is larger；
When rotor jacket uses nonmetallic materials, since its conductivity is small, eddy-current loss therein is smaller, but due to its thermal conductivity
Difference, heat dissipation effect are also poor.Therefore it no matter using metal or the rotor jacket of nonmetallic materials, cannot all be sent out simultaneously from inhibition
Two aspects of heat and improvement heat dissipation solve the problem of temperature rise of rotor.
Studies have shown that knot of the Stator Current Harmonic magnetic field into layers of copper can be shielded in permanent magnetism external surface package thin copper layer
Structure penetrates, and reduces total eddy-current loss of rotor.But if layers of copper is excessively thin, the mechanical strength of rotor not can guarantee, need additional again
One layer of nonconducting non metallic sheath, and non metallic sheath hinders rotor heat dissipation；If layers of copper is blocked up, although ensure that rotor
Mechanical strength, but the eddy-current loss of layers of copper can obviously increase, and rotor is caused to overheat.
Utility model content
The utility model provides a kind of high speed permanent magnet motor rotor structure with composite jacket, remains thin copper layer reduction
The advantages of eddy-current loss and non metallic sheath high mechanical strength, the radiating condition of rotor is improved, can subtracted using the structure
Lesser trochanter temperature rise improves the operational reliability of high-speed permanent magnet motor.
The technical solution of the utility model is as follows:
A kind of high speed permanent magnet motor rotor structure with composite jacket, including axis, rotor, permanent magnet and composite jacket, institute
It states permanent magnet and is tightly attached to rotor surface；
The composite jacket includes: collection thermosphere, non metallic sheath ring, heat-conducting layer and heat dissipating layer, and the collection thermosphere is located at shield
The innermost layer of set wraps up permanent magnet；The non metallic sheath ring with heat-conducting layer is axially spaced surrounds outside collection thermosphere；It is described to dissipate
Thermosphere is wrapped in the outer surface of non metallic sheath ring and heat-conducting layer.
The effect of collection thermosphere is to shield harmonic field to keep temperature of rotor uniform with suppression loss, thermal-arrest, and it is contour that copper can be used
Conductive, highly heat-conductive material.
The effect of non metallic sheath ring wrapping is to enhance the mechanical strength of rotor, protects the collection thermosphere of rotor and inside, supports
Permanent magnet and collection thermosphere are tightly bound in shaft and rotor core when high-speed cruising by centrifugal force resistant, can be used carbon fibre,
The high mechanical strength material such as glass fiber material.
The effect of heat-conducting layer is that the heat for issuing structure within non metallic sheath ring is conducted into heat dissipating layer, need to have height
Thermal conductivity and certain structural strength generally use material identical with collection thermosphere, such as copper is highly conductive, highly heat-conductive material.
The effect of heat dissipating layer is preferably to conduct the heat of rotor, need to be had for suppression loss very high or very low
Electric conductivity, and there is preferable mechanical strength, copper lamina or graphene coating can be used.
If rotor loss is little, fever is not serious, it has been enough by the outer surface of heat-conducting layer by rotor loss
Generated heat derives can save heat dissipating layer into motor gas-gap.
Preferably, the collection thermosphere with a thickness of 0.2~2mm.Collection thermosphere can shield Stator Current Harmonic magnetic field to
Structure in collection thermosphere penetrates, and reduces total eddy-current loss of rotor.
Preferably, the heat dissipating layer with a thickness of 0.2~2mm, the same total eddy-current loss for reducing rotor improves rotor
Radiating condition.
The thickness of the heat-conducting layer is identical as non metallic sheath ring, and thickness is determined by the structural strength demand of entire rotor.
Width ratio between single non metallic sheath ring and heat-conducting layer is 2~10, since heat-conducting layer is typically also use
Copper product necessarily will increase total eddy-current loss of rotor if the ratio of heat-conducting layer is excessively high；And if the ratio mistake of heat-conducting layer
It is small, and will affect entire heat dissipation effect.The utility model controls the width ratio between non metallic sheath ring and heat-conducting layer
Between 2~10, a balance is found between heat dissipation reducing eddy-current loss and increasing, is keeping the same of lower eddy-current loss
When preferable heat dissipation is provided.
The utility model has the following beneficial effects:
The collection thermosphere of the utility model reduces rotor eddy current loss, and the wrapping of non metallic sheath ring ensure that rotor is mechanical strong
Degree, heat-conducting layer and heat dissipating layer improve the radiating condition of rotor.The utility model can guarantee that rotor mechanical strength is enough
On the basis of reduce rotor fever and temperature rise, improve the operational reliability of high-speed permanent magnet motor.
Detailed description of the invention
Fig. 1 is the rotor structure schematic diagram of surface-mount type high-speed permanent magnet motor；
Fig. 2 is the composite jacket structural schematic diagram of the utility model high speed permanent magnet motor rotor structure；
Fig. 3 is the composite jacket sectional view of the utility model high speed permanent magnet motor rotor structure；
Fig. 4 is high speed permanent magnet motor rotor structural schematic diagram of the utility model with composite jacket.
In figure: 1, shaft and rotor core；2, permanent magnet；3, rotor jacket；301, heat dissipating layer；302, collection thermosphere；303,
Non metallic sheath ring；304, heat-conducting layer.
Specific embodiment
The high-speed permanent magnet motor with composite jacket a kind of to the utility model turns with reference to the accompanying drawings and detailed description
Minor structure is described in further detail.
As shown in Fig. 2, the composite jacket of the utility model high speed permanent magnet motor rotor structure includes: collection thermosphere 302, non-gold
Belong to sheath ring 303, heat-conducting layer 304 and heat dissipating layer 301, collection thermosphere 302 is located at the innermost layer of composite jacket, wraps up permanent magnet；It is non-
Protective metal shell ring 303 with heat-conducting layer 304 is axially spaced surrounds outside collection thermosphere 302；Heat dissipating layer 301 is wrapped in non metallic sheath
The outer surface of ring 303 and heat-conducting layer 304.
As shown in Figure 3, Figure 4, in the present embodiment, collection thermosphere 302 and heat dissipating layer 301 are copper lamina, and thickness is
0.5mm, non metallic sheath ring 303 are carbon fibre material, and the material of heat-conducting layer 304 is copper, non metallic sheath ring 303 and heat-conducting layer
304 are spaced apart, and thickness is 2mm, and the width of single non metallic sheath ring 303 is twice of heat-conducting layer 304.Keeping lower
Eddy-current loss while preferable heat dissipation is provided.
The internal diameter (i.e. the internal diameter of collection thermosphere 302) of composite jacket should be equal to the corresponding diameter of permanent magnetism external surface, when installation
The surface of the abutting rotor permanent magnet of collection thermosphere 302；Non metallic sheath ring 303 and 304 axially spaced-apart of heat-conducting layer surround collection
Outside thermosphere 302, heat-conducting layer 304 comes into full contact with collection thermosphere 302；Heat dissipating layer 301 is looped around non metallic sheath ring 303 and heat-conducting layer
304 outer surface comes into full contact with heat-conducting layer 304.If rotor loss is little, fever is not serious, heat-conducting layer 304 is relied on
Outer surface be enough by heat derives caused by rotor loss into motor gas-gap, therefore heat dissipating layer 301 can be saved.
The principles of the present invention are as follows: collection thermosphere 302 can shield penetrating, reducing rotor whirlpool for Stator Current Harmonic magnetic field
Stream loss, can also collect the temperature of heat caused by permanent magnet 2, each position of uniform permanent magnet 2；Non metallic sheath ring 303
Permanent magnet 2 and collection thermosphere 302 are tightly bound in shaft and rotor iron when high-speed cruising to enhance the mechanical strength of rotor by wrapping
On the heart 1；Heat-conducting layer 304 is by each structure in the inside of non metallic sheath ring 303 (shaft and rotor core 1, permanent magnet 2, collection thermosphere 302)
The heat of sending is conducted into heat dissipating layer 301；Heat dissipating layer 301 preferably conducts the heat of rotor.
The foregoing is merely the preferable implementation examples of the utility model, are not intended to limit the utility model, all in this reality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (8)
1. a kind of high speed permanent magnet motor rotor structure with composite jacket, which is characterized in that including axis, rotor, permanent magnet and answer
Sheath is closed, the permanent magnet is tightly attached to rotor surface；
The composite jacket includes: collection thermosphere, non metallic sheath ring, heat-conducting layer and heat dissipating layer, and the collection thermosphere is located at sheath
Innermost layer wraps up permanent magnet；The non metallic sheath ring with heat-conducting layer is axially spaced surrounds outside collection thermosphere；The heat dissipating layer
It is wrapped in the outer surface of non metallic sheath ring and heat-conducting layer.
2. the high speed permanent magnet motor rotor structure according to claim 1 with composite jacket, which is characterized in that the thermal-arrest
Layer is copper lamina.
3. the high speed permanent magnet motor rotor structure according to claim 1 with composite jacket, which is characterized in that the non-gold
The material for belonging to sheath ring is carbon fibre or glass fibre.
4. the high speed permanent magnet motor rotor structure according to claim 1 with composite jacket, which is characterized in that described thermally conductive
The material of layer is copper.
5. the high speed permanent magnet motor rotor structure according to claim 1 with composite jacket, which is characterized in that the heat dissipation
Layer is copper lamina or graphene coating.
6. the high speed permanent magnet motor rotor structure according to claim 1 with composite jacket, which is characterized in that the thermal-arrest
Layer with a thickness of 0.2~2mm.
7. the high speed permanent magnet motor rotor structure according to claim 1 with composite jacket, which is characterized in that the heat dissipation
Layer with a thickness of 0.2~2mm.
8. the high speed permanent magnet motor rotor structure according to claim 1 with composite jacket, which is characterized in that the non-gold
It is identical as the thickness of heat-conducting layer to belong to sheath ring, the ratio between width of single non metallic sheath ring and heat-conducting layer is 2~10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820642504.7U CN208257529U (en) | 2018-05-02 | 2018-05-02 | A kind of high speed permanent magnet motor rotor structure with composite jacket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820642504.7U CN208257529U (en) | 2018-05-02 | 2018-05-02 | A kind of high speed permanent magnet motor rotor structure with composite jacket |
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| Publication Number | Publication Date |
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| CN208257529U true CN208257529U (en) | 2018-12-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390484A (en) * | 2018-05-02 | 2018-08-10 | 浙江大学 | A kind of high speed permanent magnet motor rotor structure with composite jacket |
-
2018
- 2018-05-02 CN CN201820642504.7U patent/CN208257529U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390484A (en) * | 2018-05-02 | 2018-08-10 | 浙江大学 | A kind of high speed permanent magnet motor rotor structure with composite jacket |
| CN108390484B (en) * | 2018-05-02 | 2024-04-09 | 浙江大学 | High-speed permanent magnet motor rotor structure with composite sheath |
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