CN202076902U - Stator/rotor punching structure of 20 pole three-phase asynchronous motor - Google Patents
Stator/rotor punching structure of 20 pole three-phase asynchronous motor Download PDFInfo
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- CN202076902U CN202076902U CN2011201582694U CN201120158269U CN202076902U CN 202076902 U CN202076902 U CN 202076902U CN 2011201582694 U CN2011201582694 U CN 2011201582694U CN 201120158269 U CN201120158269 U CN 201120158269U CN 202076902 U CN202076902 U CN 202076902U
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Abstract
The utility model relates to a stator/rotor punching structure of a 20 pole three-phase asynchronous motor. The stator/rotor punching structure includes a rotor punching and a rotor punching which is cooperated with the rotor punching. The product of the groove number of the stator punching and the stator tooth width is 50 to 62 times the stator yoke height, and the product of the groove number of the rotor punching and the rotor tooth width is 50 to 62 times the rotor yoke height. Through the reasonable arrangement of the mutual proportions of the groove number of the stator/rotor punching, tooth width, and the yoke height, the stator/rotor punching structure becomes even, and the magnetic flux density distribution of the stator tooth part and the yoke part and the magnetic flux density distribution of the rotor tooth part and the yoke part become reasonable and balanced, so the iron loss of the punching is effectively reduced, the heating of the motor and the temperature rise of the winding are reduced, the phase belt harmonic content in the winding is lowered, and the electromagnetic noise in the motor running is also reduced, so the stator/rotor punching structure of the 20 pole three-phase asynchronous motor fully satisfies the requirement of comprehensive performances, namely the vibration, noise, efficiency, moment, and the like of the 20 pole three-phase asynchronous motor.
Description
Technical field
The utility model belongs to the design of electrical motor technical field, is specifically related to a kind of rotor punching structure of 20 pole three phase asynchronous motors.
Background technology
At present, domestic threephase asynchronous technology be widely used in 2 utmost points, 4 utmost points, 6 utmost points, 8 utmost points, 10 utmost points, 12 utmost points etc. each extremely in.In the prior art, 6 pole three phase asynchronous motors, the groove number of stator punching and the product of the stator facewidth are high 10～18 times of stator yoke, and the groove number of rotor punching and the product of the rotor facewidth are high 7～16 times of rotor yoke; 8 pole three phase asynchronous motors, the groove number of stator punching and the product of the stator facewidth are high 15～25 times of stator yoke, and the groove number of rotor punching and the product of the rotor facewidth are high 8～23 times of rotor yoke; 10 pole three phase asynchronous motors, the groove number of stator punching and the product of the stator facewidth are high 24～27 times of stator yoke, and the groove number of rotor punching and the product of the rotor facewidth are high 9～24 times of rotor yoke; 12 pole three phase asynchronous motors, the groove number of stator punching and the product of the stator facewidth are high 25～28 times of stator yoke, and the groove number of rotor punching and the product of the rotor facewidth are high 10～26 times of rotor yoke; And, then adopt the threephase asynchronous rotor punching of a certain number of poles of existing 6～12 utmost points to make for the rotor punching of 20 pole three phase asynchronous motors.
The 20 pole three phase asynchronous motor stator laminating structure schematic diagrames that Fig. 1 (a) adopts 8 pole three phase asynchronous motor stator punchings to be made into for prior art, when the magnetic flux density of 20 utmost point stator teeths be a reasonable value (for example: in the time of 15500 Gausses), the magnetic flux density of 20 utmost point stator yoke portions then is 3700～6170 Gausses, promptly the stator yoke portion magnetic flux density during 20 utmost points is 0.24～0.4 times of stator teeth magnetic flux density, causes 20 utmost point magnetic circuits obviously uneven.The 20 pole three phase asynchronous motor rotor punching structural representations that Fig. 1 (b) adopts 10 pole three phase asynchronous motor rotor punchings to be made into for prior art, when 20 utmost point rotor tooth portion magnetic flux densities be a reasonable value (for example: in the time of 15500 Gausses), the magnetic flux density of 20 utmost point rotor yokes then is 2170～5890 Gausses, promptly the rotor yoke magnetic flux density during 20 utmost points is 0.14～0.38 times of rotor tooth portion magnetic flux density, causes 20 utmost point magnetic circuits obviously uneven.If adopt 8 pole three phase asynchronous motor rotor punching structure fabrications, then the magnetic flux density of rotor yoke will be lower, and magnetic circuit will be more uneven.As seen, adopt the threephase asynchronous rotor punching of some numbers of poles of existing 6～12 utmost points to make the rotor punching of 20 pole three phase asynchronous motors, can cause magnetic circuit distributed pole imbalance, the magnetic flux density of stator teeth magnetic circuit is too saturated and magnetic flux density stator yoke portion magnetic circuit is low excessively, magnetic material is used fully, met the demands the core length that extends of having to for the magnetic flux density that makes the stator teeth magnetic circuit simultaneously, cause the waste of material, the increase of cost.There is the above-mentioned magnetic circuit unbalanced problem that distributes equally in rotor magnetic circuit.
In the prior art, the slot-number ratio Q1/Q2 that threephase asynchronous rotor commonly used cooperates has 36/28,48/44,54/58,72/58,72/86,72/84,90/72,90/106 etc., is applied to that every extremely every phase groove number all is a non-integer in 20 pole three phase asynchronous motors; For example, number of stator slots Q1=90, then the every extremely every phase groove number of stator is q=Q1/m/2P=90/3/20=3/2.When every extremely every phase groove number was non-integer, the harmonic wave content in the winding was abundant unusually, and electromagnetic noise is remarkable during the motor operation; Because the increase of harmonic wave content causes the increase of motor harmonic leakage reactance, stray loss to increase, motor starting moment, maximum moment and motor operational efficiency descend simultaneously; In addition, when every extremely every phase groove number is non-integer, be asymmetric geometry between three phase windings, cause the stator winding rule to increase man-hour, error rate increases.
In addition, the 20 pole three phase asynchronous motor stator laminating structures that adopt the threephase asynchronous stator punching of some numbers of poles of existing 6～12 utmost points to be made into also may produce electromagnetic noise, and produce bad phenomenon such as additional torque during operation.
Summary of the invention
The utility model provides a kind of rotor punching structure of 20 pole three phase asynchronous motors, solved the existing above-mentioned technological deficiency of rotor punching structure of existing 20 pole three phase asynchronous motors, satisfied of the requirement of 20 pole three phase asynchronous motors combination properties such as vibration, noise, efficient, moments.
A kind of rotor punching structure of 20 pole three phase asynchronous motors comprises stator punching and the rotor punching that cooperates with it.
The groove number of described stator punching and the product value of the stator facewidth are high 50～62 times of stator yoke, make that stator yoke portion magnetic flux density is 0.8～1.0 times of stator teeth magnetic flux density;
The groove number of described rotor punching and the product value of the rotor facewidth are high 50～62 times of rotor yoke, make that the rotor yoke magnetic flux density is 0.8～1.0 times of rotor tooth portion magnetic flux density.
In the optimized technical scheme, the groove number of described stator punching and the product value of the stator facewidth equal or approach the groove number of described rotor punching and the product value of the rotor facewidth, make the magnetic circuit relative equilibrium of stator punching and rotor punching, and make magnetic material be fully utilized, thereby reduce cost, reduce iron loss, raising performance.
In the optimized technical scheme, the slot-number ratio of described stator punching and described rotor punching is 60/45,60/75,120/92 or 120/148, make the every extremely every phase groove number (q=Q1/m/2P of stator, Q1=60 for example, m=3,2P=20 q=96/3/20=1) is integer, electromagnetic noise when having reduced the motor operation has reduced the harmonic wave content in the winding.
In the optimized technical scheme, the punching tooth of described stator punching is a parallel teeth.
In the optimized technical scheme, when the groove number of the described stator punching groove number less than described rotor punching, the slot pitch of described rotor punching is the tooth pitch of described stator punching; When the groove number of the described stator punching groove number greater than described rotor punching, the slot pitch of described rotor punching is the tooth pitch of described rotor punching, can weaken the slot ripples of motor stator rotor.
In the optimized technical scheme, described rotor punching is a mouse-cage type.
The utility model is by the reasonable setting to the high mutual ratio of groove number, the facewidth and the yoke of the punching of threephase asynchronous rotor, make rotor punching even structure, stator teeth and yoke portion magnetic flux density, rotor tooth portion and yoke portion magnetic flux distribution are rationally balanced, effectively reduce punching iron loss, reduced that the motor feels hot and reduced winding temperature rise, reduced the harmonic wave content in the winding, electromagnetic noise when having reduced the motor operation satisfies the requirement of 20 pole three phase asynchronous motors to combination properties such as vibration, noise, efficient, moments fully.
Description of drawings
The 20 pole three phase asynchronous motor stator laminating structure schematic diagrames that Fig. 1 (a) adopts 8 pole three phase asynchronous motor stator punchings to be made into for prior art.
The 20 pole three phase asynchronous motor rotor punching structural representations that Fig. 1 (b) adopts 10 pole three phase asynchronous motor rotor punchings to be made into for prior art.
Fig. 2 (a) is the stator laminating structure schematic diagram of the utility model 20 pole three phase asynchronous motors.
Fig. 2 (b) is the rotor punching structural representation of the utility model 20 pole three phase asynchronous motors.
Embodiment
In order more specifically to describe the utility model, the technical solution of the utility model is elaborated below in conjunction with the drawings and the specific embodiments.
As shown in Figure 2, a kind of rotor punching structure of 20 pole three phase asynchronous motors comprises stator punching and the rotor punching that cooperates with it.
The groove number of stator punching and the product value of the stator facewidth are high 50～62 times of stator yoke, that is: Q1 * bt1=(50～62) hj1, and the punching tooth of stator punching is a parallel teeth; The yoke portion height hj1 relative stator facewidth bt1 that can reflect stator punching is less, makes the magnetic circuit equilibrium of stator teeth and yoke portion, and magnetic material can be fully utilized.
The groove number of rotor punching and the product value of the rotor facewidth are high 50～62 times of rotor yoke, that is: Q2 * bt2=(50～62) hj2, and rotor punching is a mouse-cage type; The relative rotor facewidth of the yoke portion height hj2 bt2 that can reflect rotor punching is less, makes the magnetic circuit equilibrium of rotor tooth portion and yoke portion, and magnetic material can be fully utilized.
Table 1 is the harmonic analysis of 3 20 pole three phase asynchronous motor stator winding for prior art 54 groove spans, and table 2 is the harmonic analysis of 3 20 pole three phase asynchronous motor stator winding for present embodiment 60 groove spans.
Table 1: the harmonic analysis data of prior art 20 pole three phase asynchronous motor stator winding
| V | KQV | PHAN | Kqv+ | Kqv- | Kyv | Fv+ | Fv- |
| 2 | .093 | 126.67 | 0 | .09303 | .34202 | 0 | 16.907977 |
| 4 | .194 | 253.33 | .19371 | 0 | .64279 | 33.081341 | 0 |
| 8 | .066 | 146.67 | 0 | .06649 | .98481 | 0 | 8.699234 |
| 10 | .955 | 93.33 | .95547 | 0 | .98481 | 100 | 0 |
| 14 | .057 | 166.67 | 0 | .05709 | .64279 | 0 | 2.785905 |
| 16 | .14 | 113.33 | .14026 | 0 | .34202 | 3.186462 | 0 |
| 20 | .056 | 186.67 | 0 | .05593 | -.34202 | 0 | -1.016548 |
| 22 | .081 | 133.33 | .08096 | 0 | -.64279 | -2.513781 | 0 |
| 26 | .062 | 206.67 | 0 | .06217 | -.98481 | 0 | -2.502527 |
| 28 | .062 | 153.33 | .06217 | 0 | -.98481 | -2.323775 | 0 |
| 32 | .081 | 226.67 | 0 | .08096 | -.64279 | 0 | -1.728224 |
| 34 | .056 | 173.33 | .05593 | 0 | -.34202 | -.597969 | 0 |
| 38 | .14 | 246.67 | 0 | .14026 | .34202 | 0 | 1.341668 |
| 40 | .057 | 193.33 | .05709 | 0 | .64279 | .975067 | 0 |
| 44 | .955 | 266.67 | 0 | .95547 | .98481 | 0 | 22.727273 |
| 46 | .066 | 213.33 | .06649 | 0 | .98481 | 1.51291 | 0 |
| 50 | .194 | 106.67 | 0 | .19371 | .64279 | 0 | 2.646507 |
| 52 | .093 | 233.33 | .09303 | 0 | .34202 | .650307 | 0 |
| 56 | .093 | 126.67 | 0 | .09303 | -.34202 | 0 | -.603856 |
| 58 | .194 | 253.33 | .19371 | 0 | -.64279 | -2.281472 | 0 |
| 62 | .066 | 146.67 | 0 | .06649 | -.98481 | 0 | -1.122482 |
| 64 | .955 | 93.33 | .95547 | 0 | -.98481 | -15.625 | 0 |
| 68 | .057 | 166.67 | 0 | .05709 | -.64279 | 0 | -.573569 |
| 70 | .14 | 113.33 | .14026 | 0 | -.34202 | -.728334 | 0 |
| 74 | .056 | 186.67 | 0 | .05593 | .34202 | 0 | .274743 |
| 76 | .081 | 133.33 | .08096 | 0 | .64279 | .727673 | 0 |
| 80 | .062 | 206.67 | 0 | .06217 | .98481 | 0 | .813321 |
| 82 | .062 | 153.33 | .06217 | 0 | .98481 | .793484 | 0 |
| 86 | .081 | 226.67 | 0 | .08096 | .64279 | 0 | .64306 |
| 88 | .056 | 173.33 | .05593 | 0 | .34202 | .231034 | 0 |
| 92 | .14 | 146.67 | 0 | .14026 | -.34202 | 0 | -.554167 |
| 94 | .057 | 193.33 | .05709 | 0 | -.64279 | -.414922 | 0 |
| 98 | .955 | 266.67 | 0 | .95547 | -.98481 | 0 | -10.204082 |
| 100 | .066 | 213.33 | .06649 | 0 | -.98481 | -.695939 | 0 |
Table 2: the harmonic analysis data of present embodiment 20 pole three phase asynchronous motor stator winding
| V | KQV | PHAN | Kqv+ | Kqv- | ?Kyv | Fv+ | Fv- |
| 10 | 1 | 60 | 1 | 0 | 1 | 100 | 0 |
| 50 | 1 | -60 | 0 | 1 | 1 | 0 | 20 |
| 70 | 1 | 60 | 1 | 0 | -1 | -14.285714 | 0 |
Abundant unusually by the harmonic content in the 20 pole three phase asynchronous motor stator winding of the visible prior art of table 1, number of pole-pairs FP=100 is with in the interior harmonic wave, except that number of pole-pairs is 10 first-harmonic, also contain low-order harmonic 2,4,8, high order harmonic component 14,16,20,22,26,28,32,34,38,40,44,46,50,52,56,58,62,64,68,70,74,76,80,82,86,88,92,94,98,100 etc., be applied to then cause in the motor motor harmonic leakage reactance, stray loss, vibration and electromagnetic noise increase, motor starting moment, maximum moment and operational efficiency descend.
And it is very little by the harmonic content in the 20 pole three phase asynchronous motor stator winding of the visible present embodiment of table 2, FP=100 is with in the interior harmonic wave, except that number of pole-pairs is 10 first-harmonic, there is not low-order harmonic, also have only 50,70 in the high order harmonic component, thereby overcome prior art to the performance bad phenomenon that 20 pole three phase asynchronous motors cause, fully satisfied of the requirement of 20 pole three phase asynchronous motors combination properties such as vibration, noise, efficient, moments.
Claims (6)
1. the rotor punching structure of a pole three phase asynchronous motor comprises stator punching and the rotor punching that cooperates with it, it is characterized in that:
The groove number of described stator punching and the product value of the stator facewidth are high 50～62 times of stator yoke;
The groove number of described rotor punching and the product value of the rotor facewidth are high 50～62 times of rotor yoke.
2. the rotor punching structure of 20 pole three phase asynchronous motors according to claim 1 is characterized in that: the groove number of described stator punching and the product value of the stator facewidth equal the groove number of described rotor punching and the product value of the rotor facewidth.
3. the rotor punching structure of 20 pole three phase asynchronous motors according to claim 1 is characterized in that: the slot-number ratio of described stator punching and described rotor punching is 60/45,60/75,120/92 or 120/148.
4. the rotor punching structure of 20 pole three phase asynchronous motors according to claim 1 is characterized in that: the punching tooth of described stator punching is a parallel teeth.
5. the rotor punching structure of 20 pole three phase asynchronous motors according to claim 1 is characterized in that: when the groove number of the described stator punching groove number less than described rotor punching, the slot pitch of described rotor punching is the tooth pitch of described stator punching; When the groove number of the described stator punching groove number greater than described rotor punching, the slot pitch of described rotor punching is the tooth pitch of described rotor punching.
6. the rotor punching structure of 20 pole three phase asynchronous motors according to claim 1 is characterized in that: described rotor punching is a mouse-cage type.
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| CN2011201582694U CN202076902U (en) | 2011-05-17 | 2011-05-17 | Stator/rotor punching structure of 20 pole three-phase asynchronous motor |
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| CN2011201582694U CN202076902U (en) | 2011-05-17 | 2011-05-17 | Stator/rotor punching structure of 20 pole three-phase asynchronous motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ306464B6 (en) * | 2016-01-26 | 2017-02-01 | Vysoké Učení Technické V Brně | Distribution of conductors in the stator/rotor winding of three-phase AC rotating machines |
| CN109713808A (en) * | 2017-10-26 | 2019-05-03 | 上海鸣志电器股份有限公司 | A kind of three-phase stepper motor |
-
2011
- 2011-05-17 CN CN2011201582694U patent/CN202076902U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ306464B6 (en) * | 2016-01-26 | 2017-02-01 | Vysoké Učení Technické V Brně | Distribution of conductors in the stator/rotor winding of three-phase AC rotating machines |
| CN109713808A (en) * | 2017-10-26 | 2019-05-03 | 上海鸣志电器股份有限公司 | A kind of three-phase stepper motor |
| CN109713808B (en) * | 2017-10-26 | 2024-02-23 | 上海鸣志电器股份有限公司 | Three-phase stepping motor |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20150517 |
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