CN202034840U - Rotor of permanent magnet alternating-current servo motor - Google Patents
Rotor of permanent magnet alternating-current servo motor Download PDFInfo
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- CN202034840U CN202034840U CN2011200907025U CN201120090702U CN202034840U CN 202034840 U CN202034840 U CN 202034840U CN 2011200907025 U CN2011200907025 U CN 2011200907025U CN 201120090702 U CN201120090702 U CN 201120090702U CN 202034840 U CN202034840 U CN 202034840U
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- permanent magnet
- flat hole
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Abstract
The utility model discloses a rotor of a permanent magnet alternating-current servo motor, which comprises a permanent magnet and a magnetizer. The outer surface of the magnetizer is in the shape of a cylinder, 2P flat holes are evenly arranged on the magnetizer along the peripheral direction, N poles and S poles of 2P permanent magnets are embedded in the flat holes in a staggered manner, and the sizes of the flat holes and corresponding positions among the flat holes and the cylinder of the magnetizer are optimized. According to optimized results, the third harmonic of an air-gap magnetic field of the motor is zero, the fifth harmonic, the seventh harmonic and the ninth harmonic of the air-gap magnetic field are close to zero, and sine performance of the air-gap magnetic field is fine. Besides, the rotor of the permanent magnet alternating-current servo motor is simple in process and high in production efficiency, magnetic steel doesn't fall off, and the rotor is good in surface quality and especially suitable for a servo driver without a position sensor.
Description
Technical field
The utility model relates to machine field, relates in particular to the permanent magnetic Ac servo motor, specifically a kind of rotor of permanent magnetic Ac servo motor.
Background technology
Existing AC servo motor structure comprises casing, stator, end cap and rotor, and permanent magnet is placed on the rotor usually.Permanent magnet is placed on rotor outer surface in Fig. 1, Fig. 2 structure.Permanent magnet 1 adopts tile-shaped magnet steel, the extremely staggered outer surface that sticks on magnetic conductor 2 of 2P piece tile-shaped magnet steel N, S.The shortcoming of this rotor structure is that magnet steel can be because unreal the coming off that bond, and complex process, production efficiency are low.
Fig. 3,4 structures are the version that another kind of permanent magnet is placed on rotor outer surface, and its permanent magnet that adopts is an annular magnetic steel 1, magnetizes on the circumference of annular magnetic steel 1, make that it forms N at circumferential surface, the S utmost point is staggered, and its effect is similar to Fig. 1.This construction rotor can not produce the magnet steel obscission, but because the inhomogeneities of magnetize tool shape, structure and magnet steel all directions be difficult to accomplish that the waveform of each magnetic pole is identical, and the sine in magnetic field is also restive.
More than two kinds of rotors because magnet steel all is arranged on the outer surface of magnetic conductor 2, be called the external labeling type structure.If magnet steel is placed on the inside of magnetic conductor 2, be referred to as embedded structure, traditional embedded structure as shown in Figure 5, magnetic conductor 2 outer surfaces are cylindrical, the uniform 2P of a magnetic conductor inner annular square hole, magnet steel N, S are extremely staggered to be embedded in the described square hole, this traditional structure rotor makes the rectangular ripple of air-gap field between its rotor when design, only take distribution, short distance measure, weakened part high order harmonic component by stator winding, to improve counter potential waveform, sine is not fine.
The embedded rotor of another kind of improved structure, the outer surface of magnetic conductor 2 forms evagination off-centre operation cambered surface 5 corresponding to the square hole place of laying permanent magnet, as shown in Figure 6.Described off-centre operation cambered surface causes a non-uniform gap, makes air-gap field reach sinusoidal.But in this structure, because it is less with the beeline A size of rotor cylindrical to be used to set the outside, flat square hole two ends of permanent magnet 1 in the magnetic conductor 2, the punching easy deformation of punching out, and the outer convex arc surface 5 of rotor outer surface is not concentric circles with rotating shaft 3, can't carry out machining after changing into rotor.So the evenness of rotor outer surface is relatively poor, and burr is big, the concentricity of rotor is poor, and the dynamic unbalance degree is bigger.
Summary of the invention
To be solved in the utility model is the problems referred to above that prior art exists, and aims to provide a kind of follow-on permanent magnetic Ac servo rotor, by optimizing the physical dimension in the flat hole in the magnetic conductor, makes air-gap field reach sinusoidal.
For addressing the above problem, the utility model is by the following technical solutions: a kind of rotor of permanent magnetic Ac servo motor, comprise permanent magnet and magnetic conductor, described magnetic conductor outer surface is cylinder, described magnetic conductor upper edge circumferentially evenly offers 2P flat hole, 2P permanent magnet N utmost point and S are extremely staggered to be embedded in the described flat hole, it is characterized in that the size of each parts meets the following conditions:
Beeline A=0.3mm～0.8mm between the outside, two ends, described flat hole and the magnetic conductor outer surface;
The polygonal length of side that the width B of described permanent magnet=(0.8～0.88) * flat hole constitutes;
Distance C between the outside of described permanent magnet and the magnetic conductor outer surface=(0.032～0.036) * rotor outside diameter;
Width E=0.6mm～the 1.1mm of the magnetic conductor between the adjacent flat hole;
Described permanent magnet dual-side between the dual-side of flat hole apart from F=(2～5) * E.
According to optimizing the above-mentioned physical dimension that the result draws, the triple-frequency harmonics in motor gas-gap magnetic field is zero, and quintuple harmonics, the seventh harmonic and nine subharmonic approach zero, and the sine of air-gap field is fine.
In addition, when adopting this structure, in rotor punching punching out process, the rotor cylindrical can be amplified, be about to A and strengthen, the punching of punching out is just very smooth, after rotor is repeatedly good, cylindrical is regrinded processing once, arrive setting with the size that guarantees A, and improve the concentricity of rotor, reduce the rotor unbalancing value, the general rotor that requires can not done dynamic balancing, and the surface quality of rotor is fine.
Rotor structure of the present utility model, technology is simple, and production efficiency height, magnet steel can not come off, and rotor appearance quality is good, and dynamic unbalance is little and be particularly suitable for adopting the servo-driver of position-sensor-free.
According to the utility model, described flat hole is an axially symmetric structure, and the main part cross section in the middle of it is rectangle, and is used to place described permanent magnet, turns up in the both sides in flat hole.
According to the utility model, the width of the magnetic conductor between the adjacent flat hole is consistent, and the width of the magnetic conductor between each adjacent flat hole is identical.
Description of drawings
Fig. 1 is that the prior art permanent magnet is placed on rotor outer surface, and adopts the staggered sticking structural representation that is posted on the magnetic conductor outer surface of even numbered blocks permanent magnet of tile-shaped magnet steel.
Fig. 2 is that the A-A of Fig. 1 is to cutaway view.
Fig. 3 is that the prior art permanent magnet is placed on rotor outer surface, and permanent magnet is the structural representation of annular magnetic steel.
Fig. 4 is that the B-B of Fig. 3 is to cutaway view.
Fig. 5 prior art permanent magnet is embedded in the structural representation in the magnetic conductor.
The structural representation that Fig. 6 prior art built-in permanent magnetic body and magnetic conductor have evagination off-centre operation cambered surface.
Fig. 7 is a structural representation of the present utility model.
Fig. 8 is the structural representation of the utility model magnetic conductor.
Embodiment
With reference to Fig. 7 and Fig. 8, the rotor of a kind of permanent magnetic Ac servo motor of the present utility model, comprise permanent magnet 1 and magnetic conductor 2, described magnetic conductor 2 outer surfaces are cylinder, the circumferential individual flat hole 6 of 2P that evenly offers, described magnetic conductor 2 upper edges, 2P permanent magnet 1, the N utmost point and S are extremely staggered to be embedded in the described flat hole 6, and the size of each parts meets the following conditions:
Beeline A=0.3mm～0.8mm between the outside, 6 two ends, described flat hole and magnetic conductor 2 outer surfaces;
The polygonal length of side that the width B of described permanent magnet 1=(0.8～0.88) * flat hole constitutes;
Distance C=0.032～0.036 * rotor outside diameter between the outside of described permanent magnet 1 and magnetic conductor 2 outer surfaces;
Width E=0.6mm～the 1.1mm of the magnetic conductor between the adjacent flat hole 6;
Described permanent magnet 1 dual-side between the dual-side in flat hole 6 apart from F=(2～5) * E.
Described flat hole 6 is an axially symmetric structure, and main part 7 cross sections in the middle of it are rectangle, and are used to place described permanent magnet 1, turns up in the both sides 8 in flat hole 6.
The width of the magnetic conductor between the adjacent flat hole 6 is consistent, and the width of the magnetic conductor between each adjacent flat hole 6 is identical.
Different magnet steel width B can exert an influence to counter potential waveform, and its result is as shown in table 1.
Table 1
The dual-side of described permanent magnet 1 between the dual-side in described flat hole 6 apart from the increase of F and reduce to influence the variation of magnet steel width B, thereby influence field waveform.Its result is as shown in table 1.
The size of the distance C size between the outside of described permanent magnet 1 and magnetic conductor 2 outer surfaces can influence the interelectrode magnetic leakage size, reduces the main flux value, exerts oneself thereby influence motor; Also can have influence on motor-field, so counter potential waveform.For example when the magnet steel width B was the optimum optimization size, the distance C change in size between the outside of permanent magnet 1 and magnetic conductor 2 outer surfaces can influence counter potential waveform.Size C is as shown in table 2 to the counter potential waveform influence:
Table 2
The minimum value of the beeline A between the outside, 6 two ends, described flat hole and magnetic conductor 2 outer surfaces and the width E size of the magnetic conductor between the adjacent flat hole 6 is subjected to process technology limit, and getting minimum value is this patent recommendation.Can increase interelectrode magnetic leakage greater than this value, reduce the main flux value, reduce exerting oneself of motor.
From above experimental data as can be known, the utility model is according to optimizing the above-mentioned physical dimension that the result draws, and the triple-frequency harmonics in motor gas-gap magnetic field is zero, and quintuple harmonics, the seventh harmonic and nine subharmonic approach zero, and the sine of air-gap field is very good.
Utility model people has done detailed finite element analysis, has obtained the very high sine wave magnetic field of accuracy, is simplified to above-mentioned example for adapting to the engineering application.
What should be understood that is: the foregoing description is just to explanation of the present utility model, rather than to restriction of the present utility model, any utility model that does not exceed in the utility model connotation scope is created, and all falls within the protection range of the present utility model.
Claims (3)
1. the rotor of a permanent magnetic Ac servo motor, comprise permanent magnet (1) and magnetic conductor (2), described magnetic conductor (2) outer surface is cylinder, described magnetic conductor (2) upper edge circumferentially evenly offers 2P flat hole (6), 2P permanent magnet (1) the N utmost point and S are extremely staggered to be embedded in the described flat hole (6), it is characterized in that the size of each parts meets the following conditions:
Beeline A=0.3mm～0.8mm between the outside, two ends, described flat hole (6) and magnetic conductor (2) outer surface;
The polygonal length of side that the width B of described permanent magnet (1)=(0.8～0.88) * flat hole constitutes;
Distance C=(0.032～0.036) * rotor outside diameter between the outside of described permanent magnet (1) and magnetic conductor (2) outer surface;
Width E=0.6mm～the 1.1mm of the magnetic conductor between the adjacent flat hole (6);
Described permanent magnet dual-side between the dual-side of described flat hole apart from F=(2～5) * E.
2. the rotor of permanent magnetic Ac servo motor as claimed in claim 1, it is characterized in that described flat hole (6) is axially symmetric structure, main part (7) cross section in the middle of it is rectangle, and is used to place described permanent magnet (1), and the dual-side (8) of flat hole (6) turns up.
3. the rotor of permanent magnetic Ac servo motor as claimed in claim 2 is characterized in that the width of the magnetic conductor between the adjacent flat hole (6) is consistent, and the width of the magnetic conductor between each adjacent flat hole (6) is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200907025U CN202034840U (en) | 2011-03-31 | 2011-03-31 | Rotor of permanent magnet alternating-current servo motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200907025U CN202034840U (en) | 2011-03-31 | 2011-03-31 | Rotor of permanent magnet alternating-current servo motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202034840U true CN202034840U (en) | 2011-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200907025U Expired - Lifetime CN202034840U (en) | 2011-03-31 | 2011-03-31 | Rotor of permanent magnet alternating-current servo motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202034840U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142725A (en) * | 2011-03-31 | 2011-08-03 | 杭州德伺麦科技有限公司 | Rotor of permanent-magnet alternating current servo motor |
| CN105186816A (en) * | 2015-07-16 | 2015-12-23 | 博格思众（常州）电机电器有限公司 | Stator and rotor combined structure |
| CN107528400A (en) * | 2017-09-30 | 2017-12-29 | 广东美芝制冷设备有限公司 | Rotor, magneto and compressor |
| WO2019062130A1 (en) * | 2017-09-30 | 2019-04-04 | 广东美芝制冷设备有限公司 | Motor rotor, permanent magnet motor, and compressor |
-
2011
- 2011-03-31 CN CN2011200907025U patent/CN202034840U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142725A (en) * | 2011-03-31 | 2011-08-03 | 杭州德伺麦科技有限公司 | Rotor of permanent-magnet alternating current servo motor |
| CN105186816A (en) * | 2015-07-16 | 2015-12-23 | 博格思众（常州）电机电器有限公司 | Stator and rotor combined structure |
| CN105186816B (en) * | 2015-07-16 | 2018-08-03 | 博格思众（常州）电机电器有限公司 | The composite structure of stator and rotor |
| US10320274B2 (en) | 2015-07-16 | 2019-06-11 | Bergstrom, Inc. | Combination structure between stator and rotor in a brushless motor |
| CN107528400A (en) * | 2017-09-30 | 2017-12-29 | 广东美芝制冷设备有限公司 | Rotor, magneto and compressor |
| WO2019062130A1 (en) * | 2017-09-30 | 2019-04-04 | 广东美芝制冷设备有限公司 | Motor rotor, permanent magnet motor, and compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111109 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |