CN202231508U - Ring group type rotor protection device for permanent magnet motor - Google Patents
Ring group type rotor protection device for permanent magnet motor Download PDFInfo
- Publication number
- CN202231508U CN202231508U CN2011203316760U CN201120331676U CN202231508U CN 202231508 U CN202231508 U CN 202231508U CN 2011203316760 U CN2011203316760 U CN 2011203316760U CN 201120331676 U CN201120331676 U CN 201120331676U CN 202231508 U CN202231508 U CN 202231508U
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- CN
- China
- Prior art keywords
- permanent magnet
- rotor
- protection device
- annulus
- motor
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a ring group type rotor protection device for a permanent magnet motor, belonging to the motor field. The ring group type rotor protection device comprises a plurality of rings, which are made of non-magnetic materials and are capable of being sleeved on the periphery of a rotor of the permanent magnet motor. An insulating layer is arranged on the surface of each ring; and the rings are arranged axially to form a cylindrical protection device matching with the periphery of the rotor of the permanent magnet motor. The ring group type rotor protection device is fixed at the outer side of the motor in use. The utility model has the beneficial effects as follows: the ring group type rotor protection device solves the problem in the protection sleeve of the existing permanent magnet motor has large eddy-current loss, enhances the radiation effect of an air gap, reduces the temperature rise when a rotor permanent magnet works, prolongs the service lives of the permanent magnet, the rotor and the motor and avoids the problem of irreversible high-temperature excitation loss generated in the permanent magnet, which is caused by the high temperature rise of the solid rotor.
Description
Technical field
The utility model relates to a kind of electric motor protective device, belongs to machine field, specifically is a kind of annulus combined permanent magnet rotor protective device.
Background technology
Compare with other conventional motors, magneto has higher efficient and torque density, is applied to various drive systems more and more, like marine propeller, elevator traction machine, oil production equipment, robot, Digit Control Machine Tool, electronic production equipment etc.Magneto operates under the high-speed case, and the stator winding power frequency can reach KHz, the commentaries on classics scooter per minute commentaries on classics up to ten thousand of rotor, even several ten thousand commentaries on classics, and peripheral velocity can reach per second hundreds of rice.At present, generally adding the non-magnetic conduction sleeve of a high strength at rotor permanent magnet is the metal coating sleeve, protects permanent magnet operate as normal under big centrifugal action, and can reduce the high frequency supplementary load loss of rotor-side.But because the metal coating sleeve is electric conductor, can produce a large amount of eddy current loss, even conduct heat, cause the permanent magnet temperature rise too high and produce the non-reversible high-temperature loss of excitation, motor is damaged to rotor block.
Summary of the invention
In order to solve the problems referred to above that prior art exists, the utility model provides a kind of annulus combined permanent magnet rotor protective device, with the performance, the particularly performance when height hastens to move of raising motor operation, and guarantees the fail safe that motor moves.
The utility model is realized with following technical scheme: a kind of annulus combined permanent magnet rotor protective device; It comprises the annulus on a plurality of rotor outer rims that can be sleeved on magneto of being made by non-magnet material; On described annulus surface insulating barrier is arranged, a plurality of annulus are arranged in the tubular protective device that composition together matches with the rotor outer rim of magneto vertically.
When using, the utility model is fixed on the outside of rotor.
Principle is: common permanent magnet machine rotor protection sleeve move in magnetic field or is in the magnetic field of variation when it, all will produce induced electromotive force, forms eddy current, causes bigger eddy current loss, and considers to promote the measure of dispelling the heat.For reducing eddy current loss; The similar of the utility model is divided into many conductor sheet to original sleeve, and when magnetic flux passed the stenosed section of thin slice, eddy current was limited in along some the narrow and small loop stream mistakes in each sheet; Clean electromotive force in these loops is less; The length in loop is bigger, because the resistivity of this sheeting is big, so just can reduce eddy current loss significantly again; Owing to after being divided into many conductor sheet, big simultaneously with the contact area change in the external world, the effect of increase air gap heat radiation.
The beneficial effect of the utility model is: add the utility model protective device in the rotor outside; Efficiently solve the existing bigger problem of magneto protection sleeve eddy current loss; When particularly kelvin effect was obvious, its effect was more remarkable, and protective device increases with extraneous contact area; Strengthened the effect of air gap heat radiation; Temperature rise when having reduced rotor permanent magnet work, the working life that has prolonged permanent magnet and rotor, motor is avoided by the too high problem that causes rotor permanent magnet to produce the non-reversible high-temperature loss of excitation of solid rotor temperature rise.
Description of drawings
Fig. 1 is an annulus group formula protective device structural representation.
Fig. 2 is annulus group formula protective device and rotor assembling sketch map.
Among the figure: 1, annulus group formula protective device, 2, annulus, 3, rotor.
Embodiment
As shown in Figure 1; The tubular structure that the annulus group that annulus group formula protective device 1 is made up of one group of annulus 2 constitutes; Annulus 2 is by non-magnetic conductive metal material, and a plurality of annulus 2 are arranged in the tubular protective device that composition together matches with the rotor outer rim of magneto vertically.
In order to reduce the influence of eddy current loss; The width requirement of annulus 2 is narrow more good more; Can suitably relax the width of annulus 2 according to the demand of mounting process, the thickness of annulus 2 also should not be too thick, in order to avoid influence the air gap of motor; Take all factors into consideration influence, confirm its width and thickness through testing to motor runnability and mounting process.The mode of the surface of annulus 2 through coating adhesive reaches the mutually insulated between ring and the ring and mutually combines, and promptly the surfaces coated of annulus 2 is covered with binding agent and makes insulating barrier and adjacent annulus is bonded together.
As shown in Figure 2, annulus group formula protective device 1 is installed in the outside of rotor 3 with the mode of interference fit, reaches through this mode to reduce eddy current loss, strengthens the effect of air gap heat radiation.
Claims (2)
1. annulus combined permanent magnet rotor protective device; It is characterized in that; It comprises by non-magnetic conductive metal material a plurality of can be sleeved on the annulus (2) on the rotor outer rim of magneto; On described annulus (2) surface insulating barrier is arranged, a plurality of annulus (2) are arranged in the tubular protective device (1) that composition together matches with the rotor outer rim of magneto vertically.
2. annulus combined permanent magnet rotor protective device according to claim 1 is characterized in that: the surfaces coated of described annulus (2) is covered with binding agent and makes insulating barrier and adjacent annulus is bonded together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203316760U CN202231508U (en) | 2011-09-06 | 2011-09-06 | Ring group type rotor protection device for permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203316760U CN202231508U (en) | 2011-09-06 | 2011-09-06 | Ring group type rotor protection device for permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202231508U true CN202231508U (en) | 2012-05-23 |
Family
ID=46082081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203316760U Expired - Fee Related CN202231508U (en) | 2011-09-06 | 2011-09-06 | Ring group type rotor protection device for permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202231508U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612166A (en) * | 2017-09-22 | 2018-01-19 | 沈端劼 | A kind of rotor with stacked protective metal shell |
| CN113659743A (en) * | 2021-09-02 | 2021-11-16 | 追觅创新科技(苏州)有限公司 | Rotor structure and motor |
-
2011
- 2011-09-06 CN CN2011203316760U patent/CN202231508U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612166A (en) * | 2017-09-22 | 2018-01-19 | 沈端劼 | A kind of rotor with stacked protective metal shell |
| CN113659743A (en) * | 2021-09-02 | 2021-11-16 | 追觅创新科技(苏州)有限公司 | Rotor structure and motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20140906 |
|
| EXPY | Termination of patent right or utility model |