CN205489858U - Rotor structure of built -in permanent magnet motor - Google Patents
Rotor structure of built -in permanent magnet motor Download PDFInfo
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- CN205489858U CN205489858U CN201620087028.8U CN201620087028U CN205489858U CN 205489858 U CN205489858 U CN 205489858U CN 201620087028 U CN201620087028 U CN 201620087028U CN 205489858 U CN205489858 U CN 205489858U
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Abstract
The utility model discloses a rotor structure of built -in permanent magnet motor, it includes the rotor shaft, the cover is established at epaxial rotor core of rotor and the magnet steel of a plurality of cartridge in rotor core, rotor core's diaxon end all is provided with the cover and establishes at the epaxial balanced ring of rotor, the thermal expansion coefficient of balanced ring is unanimous with the thermal expansion coefficient of rotor shaft, balanced anchor ring on to rotor core's a terminal surface an organic whole be provided with annular boss, annular boss and rotor core's the axle head terminal surface and the terminal surface crimp connection of magnet steel, and it separates the magnetic gap to make to exist between balanced ring and the rotor core, the advantage is because the thermal expansion coefficient of balanced ring is unanimous with the thermal expansion coefficient of rotor shaft, therefore the phenomenon of unstability can not appear in the balanced ring of this rotor during operation, can not thrown away job stabilization and safe and reliable, balanced ring can adopt cast iron, steel etc. To make, and ring balanced so can not become flexible because high temperature causes the thermal energy, but this rotor wide application in the motor of various high rotational speeds, high temperature, high strength work.
Description
Technical field
This utility model relates to a kind of motor, especially relates to the rotor structure of a kind of built-in permanent magnet (IPM, Interior Permanent Magnet) motor.
Background technology
New-energy automobile be country give priority to industry.As the power core of automobile, automobile permasyn morot is faced with good opportunity to develop.Automobile permasyn morot requires under the ambient temperature of-40～130 DEG C, rotating speed reaches more than 15000rpm, its working condition requirement, under high-temperature difference, reaches the motor performance of high rotating speed, high torque (HT), and therefore rotor structure and material requirements to automobile permasyn morot are the highest.
The existing patent of invention " p-m rotor that magnet steel is embedded " (Publication No. CN102684340A) such as China's bulletin discloses the p-m rotor that a kind of magnet steel is embedded, it includes the rotor core being set on armature spindle, magnet steel is inserted on rotor core, two sides of rotor core are provided with the balance ring being set on armature spindle, this balance ring is made up of non-magnet material, the other end of this balance ring is provided with the positioning boss that more than one is prominent, being provided with the hole, location of correspondence on rotor core, positioning boss is inserted in hole, location.This p-m rotor has feature simple and reasonable, that magnet steel axial restraint reliable, electric and magnetic oscillation is little with noise, temperature rise is low, electromagnetic material consumption is few.But, this p-m rotor there is problems in that 1) due to balance ring use non-magnet material make, as used aluminum to make, therefore this p-m rotor is applicable only to the motor of the slow-speed of revolution (below 2000rpm), low-temperature working, say, that this p-m rotor is not suitable for electric automobile industry；2) using non-magnet material to make due to balance ring, thermal coefficient of expansion is higher, balances ring and unstable phenomenon occurs, thus very likely cause balance ring to throw away when this p-m rotor therefore can be caused to work；3) this p-m rotor is the axial stability guaranteeing magnet steel, it is desirable between balance ring and rotor core gap is the least or gapless；4) armature spindle uses interference fit to realize being connected with rotor core, but the torque that interference fit can be transmitted is less, and this p-m rotor therefore can be caused easily to skid under high overload.
Summary of the invention
Technical problem to be solved in the utility model is to provide the rotor structure of a kind of built-in permanent magnet motor, its working stability and safe and reliable, can be widely applied to various high rotating speed, high temperature, the motor of intensive work, is particularly well-suited to electric automobile industry.
The technical scheme that the above-mentioned technical problem of this utility model solution is used is: the rotor structure of a kind of built-in permanent magnet motor, including armature spindle, it is set in the rotor core on described armature spindle and multiple magnet steel being plugged in described rotor core, the two axial ends of described rotor core is provided with the balance ring being set on described armature spindle, it is characterized in that: the thermal coefficient of expansion of described balance ring is consistent with the thermal coefficient of expansion of described armature spindle, described balance anchor ring has been wholely set annular boss on the end face of described rotor core, described annular boss is connected with the axle head end face of described rotor core and the end face crimping of described magnet steel, and make to exist every magnetic gap between described balance ring and described rotor core.
Being wholely set the outer annular portion of bossed inner portion and projection on the other end of the rotor core that described balance ring is described dorsad, the annular chamber between described inner portion and described outer annular portion is the balance mud filling chamber for filling balance mud.Here, by being wholely set the inner portion of projection and the outer annular portion of projection in the end face outside of balance ring, make to form a balance mud between inner portion and outer annular portion and fill chamber to fill balance mud.
Described annular boss is arranged at described balance anchor ring in the outer circumferential edges of the end face of described rotor core.Here, owing to annular boss is connected for the end face crimping with the axle head end face and magnet steel of rotor core, need to be therefore the external diameter less than rotor core by the diameter design of balance ring during actual design.
The ring width of described annular boss is 2～3 millimeters.Here, the ring width of annular boss is drawn by great many of experiments on the basis of the application, on the premise of guaranteeing to compress magnet steel, design as far as possible narrowly, to reduce leakage field.
On the inner port edge of the other end that described inner portion is arranged at described balance ring rotor core described dorsad, in the outer circumferential edges of the other end that described outer annular portion is arranged at described balance ring rotor core described dorsad.When specific design, the internal diameter of inner portion is consistent with the endoporus aperture of balance ring, and inner portion and balance ring are connected with armature spindle interference fit.
Keyway is used to be connected between described armature spindle and described rotor core.Here, owing to using keyway to be connected between armature spindle and rotor core, big torque therefore can be transmitted, will not skid under high overload.
Compared with prior art, the utility model has the advantage of:
1) consistent with the thermal coefficient of expansion of armature spindle due to the thermal coefficient of expansion of balance ring, therefore during this working rotor, balance ring does not haves unstable phenomenon, will not be thrown out of, working stability and safe and reliable.
2) consistent with the thermal coefficient of expansion of armature spindle due to the thermal coefficient of expansion of balance ring, and armature spindle typically uses iron material to make, therefore balance ring can use the material such as cast iron, steel to make, so balance ring will cause thermal expansion to loosen because of high temperature, thus ensure that this rotor can be widely applied to various high rotating speed, high temperature, the motor of intensive work, it is particularly well-suited to electric automobile industry.
3) consistent with the thermal coefficient of expansion of armature spindle due to the thermal coefficient of expansion of balance ring, therefore there is magnetic conduction problem in balance ring, for reducing leakage field as far as possible, on the end face of rotor core, an annular boss it is wholely set at balance anchor ring, annular boss is utilized to realize ring shaped contact with the axle head end face of rotor core and the end face of magnet steel, and make existence one between balance ring and rotor core every magnetic gap, so in the case of a small amount of leakage field, compress magnet steel reliably.
4) magnet steel uses interpolation type, and during this rotor high speed rotating, magnet steel also will not fly out because of centrifugal force, is suitable for high-revolving motor.
Accompanying drawing explanation
Fig. 1 is the perspective view of the rotor structure of built-in permanent magnet motor of the present utility model；
Fig. 2 is the axial sectional structure schematic diagram of Fig. 1；
Fig. 3 is the radial direction sectional structure schematic diagram of Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.
nullThe rotor structure of a kind of built-in permanent magnet motor that the utility model proposes，As shown in the figure，It includes armature spindle 1、The rotor core 2 being set on armature spindle 1 and multiple magnet steel 3 being plugged in rotor core 2，The two axial ends of rotor core 2 is provided with the balance ring 4 being set on armature spindle 1，The thermal coefficient of expansion of balance ring 4 is consistent with the thermal coefficient of expansion of armature spindle 1，Balance ring 4 has been wholely set annular boss 41 in the outer circumferential edges of the end face of rotor core 2，Annular boss 41 is connected with the axle head end face of rotor core 2 and the end face crimping of magnet steel 3，And make to exist every magnetic gap 42 between balance ring 4 and rotor core 2，It is wholely set bossed inner portion 43 on the inner port edge of balance ring 4 other end of rotor core 2 dorsad，It is wholely set bossed outer annular portion 44 in the outer circumferential edges of balance ring 4 other end of rotor core 2 dorsad，Annular chamber between inner portion 43 and outer annular portion 44 is the balance mud filling chamber 45 for filling balance mud.
In the present embodiment, use keyway 5 to be connected between armature spindle 1 and rotor core 2, big torque can be transmitted so that this rotor will not skid under high overload.
In the present embodiment, the ring width of annular boss 41 may be designed as 2～3 millimeters, and the ring width of annular boss 41 is drawn by great many of experiments on the basis of the application, on the premise of guaranteeing to compress magnet steel 3, designs as far as possible narrowly, to reduce leakage field.When specific design as the ring width of annular boss 41 being designed as 2.5 millimeters.
Here, owing to annular boss 41 is connected for the end face crimping with the axle head end face and magnet steel 3 of rotor core 2, need to be therefore the external diameter less than rotor core 2 by the diameter design of balance ring 4 during actual design.When specific design, the internal diameter of inner portion 43 is consistent with the endoporus aperture of balance ring 4, and inner portion 43 and balance ring 4 are connected with armature spindle 1 interference fit.
In the present embodiment, balance ring 4, annular boss 41, inner portion 43 and outer annular portion 44 use the material such as cast iron, steel to be made into integration.
Claims (6)
1. the rotor structure of a built-in permanent magnet motor, including armature spindle, it is set in the rotor core on described armature spindle and multiple magnet steel being plugged in described rotor core, the two axial ends of described rotor core is provided with the balance ring being set on described armature spindle, it is characterized in that: the thermal coefficient of expansion of described balance ring is consistent with the thermal coefficient of expansion of described armature spindle, described balance anchor ring has been wholely set annular boss on the end face of described rotor core, described annular boss is connected with the axle head end face of described rotor core and the end face crimping of described magnet steel, and make to exist every magnetic gap between described balance ring and described rotor core.
The rotor structure of a kind of built-in permanent magnet motor the most according to claim 1, it is characterized in that: be wholely set the outer annular portion of bossed inner portion and projection on the other end of the rotor core that described balance ring is described dorsad, the annular chamber between described inner portion and described outer annular portion is the balance mud filling chamber for filling balance mud.
The rotor structure of a kind of built-in permanent magnet motor the most according to claim 1 and 2, it is characterised in that: described annular boss is arranged at described balance anchor ring in the outer circumferential edges of the end face of described rotor core.
The rotor structure of a kind of built-in permanent magnet motor the most according to claim 3, it is characterised in that: the ring width of described annular boss is 2～3 millimeters.
The rotor structure of a kind of built-in permanent magnet motor the most according to claim 2, it is characterized in that: on the inner port edge of the other end that described inner portion is arranged at described balance ring rotor core described dorsad, in the outer circumferential edges of the other end that described outer annular portion is arranged at described balance ring rotor core described dorsad.
The rotor structure of a kind of built-in permanent magnet motor the most according to claim 1 and 2, it is characterised in that: use keyway to be connected between described armature spindle and described rotor core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620087028.8U CN205489858U (en) | 2016-01-28 | 2016-01-28 | Rotor structure of built -in permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620087028.8U CN205489858U (en) | 2016-01-28 | 2016-01-28 | Rotor structure of built -in permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205489858U true CN205489858U (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620087028.8U Active CN205489858U (en) | 2016-01-28 | 2016-01-28 | Rotor structure of built -in permanent magnet motor |
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| Country | Link |
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| CN (1) | CN205489858U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533009A (en) * | 2016-12-13 | 2017-03-22 | 江苏瑞斯曼节能技术有限公司 | Novel permanent-magnet rotor and motor |
| CN108988525A (en) * | 2017-06-03 | 2018-12-11 | 建准电机工业股份有限公司 | Counterweight rotor |
| CN109167470A (en) * | 2018-10-30 | 2019-01-08 | 东昌电机(深圳)有限公司 | A kind of rotor |
| CN116210142A (en) * | 2020-12-22 | 2023-06-02 | 浙江吉利控股集团有限公司 | Motor rotor balance ring, motor rotor assembly and assembly method |
-
2016
- 2016-01-28 CN CN201620087028.8U patent/CN205489858U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533009A (en) * | 2016-12-13 | 2017-03-22 | 江苏瑞斯曼节能技术有限公司 | Novel permanent-magnet rotor and motor |
| CN108988525A (en) * | 2017-06-03 | 2018-12-11 | 建准电机工业股份有限公司 | Counterweight rotor |
| CN109167470A (en) * | 2018-10-30 | 2019-01-08 | 东昌电机(深圳)有限公司 | A kind of rotor |
| CN116210142A (en) * | 2020-12-22 | 2023-06-02 | 浙江吉利控股集团有限公司 | Motor rotor balance ring, motor rotor assembly and assembly method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |