CN110829660A - Motor stator winding, method and motor - Google Patents
Motor stator winding, method and motor Download PDFInfo
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- CN110829660A CN110829660A CN201810909960.8A CN201810909960A CN110829660A CN 110829660 A CN110829660 A CN 110829660A CN 201810909960 A CN201810909960 A CN 201810909960A CN 110829660 A CN110829660 A CN 110829660A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Windings For Motors And Generators (AREA)
Abstract
The embodiment of the invention discloses a motor stator winding and a motor. Wherein, the number of stator slots is 48 slots, the number of poles is 4 poles, and the number of phases is three phases; three circles of motor stator windings are concentrically wound, and stator slot coil arrangement layers under each phase of each pole are arranged in a single-layer-double-layer-single-layer-double-layer mode. The technical scheme in the embodiment of the invention can realize the end copper saving, thereby reducing the copper consumption.
Description
Technical Field
The invention relates to the field of motors, in particular to a motor stator winding, a method and a motor.
Background
The efficiency of a three-phase alternating current asynchronous motor is the ratio of output power to input power, and the smaller the input power is, the higher the efficiency of the motor is. The difference between the input power and the output power is the total loss of the motor, wherein the stator copper loss is the highest loss in the total loss of the motor.
At present, stator windings of some motors adopt a 48-slot 4-pole traditional short-distance double-layer lap winding arrangement mode, the average half turn length of the windings of the arrangement mode is longer, copper wires are more in demand, and the copper consumption is high.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a stator winding and a method for a motor, and provide a motor to reduce the amount of copper wires and reduce copper consumption.
In the motor stator winding provided by the embodiment of the invention, the number of stator slots is 48, the number of poles is 4, and the number of phases is three; the motor stator winding is concentrically wound in three circles, and the stator slot coil arrangement layers under each phase of each pole are arranged in a single-layer-double-layer-single-layer-double-layer mode.
In one embodiment, the three concentrically wound coils have a span of 1-13/2-12/3-11.
In one embodiment, the single-double layer-single layer-double layer has a number of coil turns that satisfies: single 2 b-double (a + a) turns-single 2b turns-double (c + c) turns; the single layer is realized by a middle-span coil in one three-circle concentric continuous winding coil group, the double layer of (a + a) turns is realized by the superposition of long-span coils in two three-circle concentric continuous winding coil groups, and the double layer of (c + c) turns is realized by the superposition of short-span coils in two three-circle concentric continuous winding coil groups; wherein, a is the number of turns of the long-span coil, c is the number of turns of the short-span coil, 2b is the number of turns of the middle-span coil, and a, 2b and c are positive integers.
In one embodiment, the total number of coils in each slot is the same, and a is 10, and 2b is 20.
In one embodiment, the total number of coils in each slot is different, and a is 11, c is 9, and 2b is 20.
The motor stator winding method provided by the embodiment of the invention is applied to a stator with 48 slots, 4 poles and three phases; the method comprises the following steps: three circles are concentrically wound, and the stator slot coil arrangement layers under each phase of each pole are arranged in a single-layer-double-layer-single-double-layer mode.
In one embodiment, the three concentrically wound coils have a span of 1-13/2-12/3-11.
In one embodiment, the single-double layer-single layer-double layer has a number of coil turns that satisfies: single 2 b-double (a + a) turns-single 2b turns-double (c + c) turns; the single layer is realized by a middle-span coil in one three-circle concentric continuous winding coil group, the double layer of (a + a) turns is realized by the superposition of long-span coils in two three-circle concentric continuous winding coil groups, and the double layer of (c + c) turns is realized by the superposition of short-span coils in two three-circle concentric continuous winding coil groups; wherein, a is the number of turns of the long-span coil, c is the number of turns of the short-span coil, 2b is the number of turns of the middle-span coil, and a, 2b and c are positive integers.
In one embodiment, the total number of coils in each slot is the same, and a is 10, and 2b is 20.
In one embodiment, the total number of coils in each slot is different, and a is 11, c is 9, and 2b is 20.
An embodiment of the present invention provides a motor, including: a stator winding for an electrical machine as described in any of the above embodiments.
Therefore, in the embodiment of the invention, three circles of concentric continuous winding are adopted, and the coil arrangement layers under each phase of each pole are arranged in a single-layer-double-layer-single-layer-double-layer mode, so that the result that the coil arrangement layers are shorter than the common lap winding by one span can be realized, and the copper can be saved at the end part.
Furthermore, the number of turns of the concentric windings with different spans can be properly adjusted according to different requirements, so that the functions of improving the power factor, or weakening harmonic waves, improving the efficiency and reducing the temperature rise can be realized.
Drawings
The foregoing and other features and advantages of the invention will become more apparent to those skilled in the art to which the invention relates upon consideration of the following detailed description of a preferred embodiment of the invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a stator winding of a conventional motor.
Fig. 2 is an exemplary block diagram of a stator winding of an electric machine in an embodiment of the invention.
Fig. 3 is a diagram illustrating a distribution of turns of a coil of a stator winding of a motor according to an embodiment of the present invention.
Fig. 4A and 4B are diagrams illustrating a distribution of the number of turns of the stator winding of the motor according to an example of the present invention.
Wherein the reference numbers are as follows:
| reference numerals | Means of |
| 20 | Three-circle concentric continuous |
| 21 | |
| 22 | |
| 23 | Short span coil |
Detailed Description
In the embodiment of the invention, in order to reduce the consumption of copper wires and reduce copper consumption, the copper saving at the end part compared with the common short-distance double-layer lap winding is realized, specifically, three circles of concentric continuous winding can be adopted, and the coil arrangement layers under each phase of each pole are arranged in a single-layer-double-layer-single-layer-double-layer mode to realize the effect of saving copper at the end part by one span shorter than the common short-distance double-layer lap winding. Furthermore, the number of turns of the concentric windings with different spans can be properly adjusted according to different requirements, so that the functions of improving the power factor or weakening the harmonic waves can be realized.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples.
Fig. 1 is a schematic structural diagram of a stator winding of a conventional motor. As shown in fig. 1, the number Q of stator slots is 48, the leftmost slot is the 1 st slot, the rightmost slot is the 48 th slot, the number of poles 2p is 4, the number a of parallel branches is 4, and the span y is 1 to 12. During winding, the traditional short-distance double-layer lap winding mode is adopted, each phase consists of 16 coils, each pole comprises 4 groups of coils, and each group comprises 4 coils.
Fig. 2 is an exemplary block diagram of a stator winding of an electric machine in an embodiment of the invention. As shown in fig. 2, the number of stator slots is 48, the leftmost end is the 1 st slot, the rightmost end is the 48 th slot, the number of poles is 4, and the number of phases is three. When winding, a three-turn concentric winding mode can be adopted, such as a three-turn continuous winding coil group composed of three coils 21, 22, 23 which are concentrically wound as shown in fig. 2, wherein the coil 21 is a long-span coil, the coil 22 is a middle-span coil, and the coil 23 is a short-span coil. In addition, the stator slot coil arrangement layers under each phase of each pole in the embodiment may be arranged in a single-layer-double-layer-single-layer-double manner. In fig. 2, a single layer is respectively realized by the middle-span coil in one three-turn concentrically-wound coil group, a double layer is realized by the superposition of the long-span coils in two three-turn concentrically-wound coil groups, and the other double layer is realized by the superposition of the short-span coils in two three-turn concentrically-wound coil groups.
As shown in fig. 2, in the present embodiment, the coil span y of three concentric coils is 1-13/2-12/3-11, i.e. the average span is 10, which can achieve the effect of the arrangement with the span 11 as shown in fig. 1, and compared with the short-distance double-layer lap winding method with the span 11, can save the copper used for the end, the number of slot insulators and the labor hour for the winding.
In addition, in other embodiments, three concentrically-wound coil spans can also be implemented in other manners, which are not listed here.
Furthermore, the number of turns of the concentric windings with different spans can be properly adjusted according to different requirements, so that the functions of improving the power factor or weakening the harmonic waves can be realized. That is, by increasing the number of turns of the long span, the fundamental wave winding coefficient can be increased, thereby increasing the power factor; the number of short span turns is increased, the turn ratio is properly adjusted, the harmonic content can be reduced, and the purpose of improving the electrical performance of the motor is achieved.
Fig. 3 is a schematic diagram of the distribution of the number of turns of the coil of the stator winding of the motor in the embodiment of the invention. As shown in fig. 3, the coil arrangement layer of each phase of each pole has a single layer of (2b +0) turns, and the double layers are spaced by (a + a) turns and (c + c) turns, that is, the upper and lower layers of the double layer having the turns of (a + a) are respectively composed of a turns, and the upper and lower layers of the double layer having the turns of (c + c) are respectively composed of c turns. That is, the number of coil turns of the single layer-double layer-single layer-double layer satisfies: single layer 2b turns-double layer (a + a) turns-single layer 2b turns-double layer (c + c) turns. In this case, (2b +0), (a + a), and (c + c) may be completely equal, may be partially equal, or may be completely different. Wherein, a is the number of turns of the long-span coil, c is the number of turns of the short-span coil, 2b is the number of turns of the middle-span coil, and a, 2b and c are positive integers.
Based on the coil arrangement in fig. 3, the winding factor Kdpv can be calculated according to the following formula (1):
Kdpv＝[(2bcos(10v)+a+ccos(20v)]/(2b+a+c)(1)
where v is the harmonic order, and when v is 1, Kdp1 is the fundamental winding coefficient.
Fig. 4A and 4B show a schematic diagram of the distribution of the number of turns of the coil for the stator winding of the motor in two examples of the invention.
As shown in fig. 4A, the total number of coils in each slot is the same in this example, that is, (a + a) ═ c ═ 2b in this example. In fig. 4A, the single layer is 20 turns, and the upper and lower layers of the double layer are respectively composed of 10 turns. That is, a is 10, and 2b is 20. Accordingly, the fundamental winding coefficient Kdp1 ═ 2 × 10 × cos (10 × 1) +20+10cos (20 × 1) ]/40 ═ 0.949469.
As shown in fig. 4B, the total number of coils in each slot is different in this example, that is, (a + a) ≠ (c + c) ≠ 2B in this example. As shown in fig. 4B, the single layer is 20 turns, and the double layer is distributed with intervals of 22 turns and 18 turns; wherein, the upper layer and the lower layer of the double-layer with 22 turns are respectively composed of 11 turns, and the upper layer and the lower layer of the double-layer with 18 turns are respectively composed of 9 turns. That is, a is 11, c is 9, and 2b is 20. Accordingly, the fundamental winding coefficient Kdp1 ═ 2 × 10cos (10 × 1) +11+9cos (20 × 1) ]/40 ═ 0.952819.
It can be seen that the long span turns 22 in fig. 4B are larger than the long span turns 20 in fig. 4A, and accordingly, the fundamental winding coefficient in fig. 4B is larger than that in fig. 4A, thereby having a higher power factor and a lower temperature rise.
The motor stator winding in the embodiment of the present invention is described in detail above, and the motor stator winding method in the embodiment of the present invention is described in detail below. For details which are not disclosed in the method embodiment of the present invention, reference is made to the corresponding description of the stator winding embodiment of the motor of the present invention described above.
The embodiment of the invention also provides a motor stator winding method, which adopts a three-circle concentric continuous winding mode, and stator slot coil arrangement layers under each phase of each pole are arranged according to a single-layer-double-layer-single-layer-double-layer mode. In this embodiment, the single layer is respectively realized by the middle-span coil in one of the three concentric coil groups, the double layer is realized by the superposition of the long-span coils in the two three concentric coil groups, and the other double layer is realized by the superposition of the short-span coils in the two three concentric coil groups. In addition, the coil span y of three concentric coils is 1-13/2-12/3-11, the average span is 10, the effect of the arrangement with the span 11 as shown in fig. 1 can be realized, and compared with a short-distance double-layer lap winding mode with the span 11, the copper for the end part can be saved, the number of slot insulation can be saved, and the working hour for winding can be saved.
During specific implementation, the number of turns of the concentric windings with different spans can be properly adjusted according to different requirements, and the functions of improving power factors or weakening harmonic waves can be realized. The fundamental wave winding coefficient can be improved by improving the number of turns of the long span, so that the power factor can be improved; the number of short span turns is increased, the turn ratio is properly adjusted, the harmonic content can be reduced, and the purpose of improving the electrical performance of the motor is achieved.
For example, the coil arrangement layer under each phase of each pole has a single layer of (2b +0) turns, and the double layers are distributed at intervals of (a + a) turns and (c + c) turns, that is, the upper and lower layers of the double layer with the turns of (a + a) are respectively composed of a turns, and the upper and lower layers of the double layer with the turns of (c + c) are respectively composed of c turns. That is, the number of coil turns of the single layer-double layer-single layer-double layer satisfies: single layer 2b turns-double layer (a + a) turns-single layer 2b turns-double layer (c + c) turns. Wherein a is the number of long span turns in the three-circle concentric winding, c is the number of short span turns in the three-circle concentric winding, 2b is the number of middle span turns in the three-circle concentric winding, and a, 2b and c are positive integers.
Wherein (2b +0), (a + a) and (c + c) may be identical, i.e. the total number of coils per slot is the same. For example, a ═ c ═ 10, 2b ═ 20, that is, a single layer is 20 turns, and upper and lower layers of the double layer are each composed of 10 turns.
Alternatively, (2b +0), (a + a) and (c + c) may be completely unequal, i.e., the total number of coils per slot is different. For example, a is 11, c is 9, 2b is 20, that is, a single layer is 20 turns, and a double layer is distributed by intervals of 22 turns and 18 turns; wherein, the upper layer and the lower layer of the double-layer with 22 turns are respectively composed of 11 turns, and the upper layer and the lower layer of the double-layer with 18 turns are respectively composed of 9 turns.
Furthermore, (2b +0), (a + a), and (c + c) may also be partially equal in some embodiments, which are not limited herein.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (11)
1. A motor stator winding, the number of stator slots is 48 slots, the number of poles is 4 poles, and the number of phases is three phases; the stator slot coil is characterized in that three circles are concentrically wound, and the stator slot coil arrangement layers under each phase of each pole are arranged in a single-layer-double-layer-single-layer-double-layer mode.
2. The stator winding of an electrical machine of claim 2, wherein the three concentrically wound coils span between 1-13/2-12/3-11.
3. A stator winding according to claim 1 or 2, wherein the number of coil turns of the single-layer-double-layer-single-double-layer is such that: single 2 b-double (a + a) turns-single 2b turns-double (c + c) turns; the single layer is realized by a middle-span coil in one three-circle concentric continuous winding coil group, the double layer of (a + a) turns is realized by the superposition of long-span coils in two three-circle concentric continuous winding coil groups, and the double layer of (c + c) turns is realized by the superposition of short-span coils in two three-circle concentric continuous winding coil groups; wherein, a is the number of turns of the long-span coil, c is the number of turns of the short-span coil, 2b is the number of turns of the middle-span coil, and a, 2b and c are positive integers.
4. A stator winding for an electrical machine according to claim 3, wherein the total number of coils in each slot is the same, and a-c-10 and 2 b-20.
5. A stator winding for an electrical machine according to claim 3, wherein the total number of coils in each slot is different, and a-11, c-9, and 2 b-20.
6. A motor stator winding method is applied to a stator with 48 slots, 4 poles and three phases; the method is characterized by comprising the following steps:
and the stator slot coil arrangement layers under each phase of each pole are arranged in a single-layer-double-layer-single-layer-double-layer mode by adopting a three-circle concentric continuous winding mode.
7. The method of claim 6, wherein the three concentrically wound coils span between 1-13/2-12/3-11.
8. The motor stator winding method according to claim 6 or 7, wherein the number of coil turns of the single-layer-double-layer-single-double-layer is satisfied: single 2 b-double (a + a) turns-single 2b turns-double (c + c) turns; the single layer is realized by a middle-span coil in one three-circle concentric continuous winding coil group, the double layer of (a + a) turns is realized by the superposition of long-span coils in two three-circle concentric continuous winding coil groups, and the double layer of (c + c) turns is realized by the superposition of short-span coils in two three-circle concentric continuous winding coil groups; wherein, a is the number of turns of the long-span coil, c is the number of turns of the short-span coil, 2b is the number of turns of the middle-span coil, and a, 2b and c are positive integers.
9. The method of claim 8 wherein the total number of coils in each slot is the same, and a-c-10 and 2 b-20.
10. The method of claim 8 wherein the total number of coils in each slot is different and a is 11, c is 9, and 2b is 20.
11. An electric machine comprising a stator and a rotor; the motor stator winding is characterized in that the stator adopts the motor stator winding as claimed in any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810909960.8A CN110829660A (en) | 2018-08-10 | 2018-08-10 | Motor stator winding, method and motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810909960.8A CN110829660A (en) | 2018-08-10 | 2018-08-10 | Motor stator winding, method and motor |
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| CN110829660A true CN110829660A (en) | 2020-02-21 |
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| CN201810909960.8A Pending CN110829660A (en) | 2018-08-10 | 2018-08-10 | Motor stator winding, method and motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111786488A (en) * | 2020-06-04 | 2020-10-16 | 苏州汇川技术有限公司 | Motor stator and motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61121731A (en) * | 1984-11-16 | 1986-06-09 | Toshiba Corp | Three phase armature winding |
| CN202586559U (en) * | 2012-04-17 | 2012-12-05 | 钱潮轴承有限公司 | Single-and-double-layer concentric windings of stator of drive motor of pure electric bus |
| CN207677535U (en) * | 2018-01-23 | 2018-07-31 | 江门市江晟电机厂有限公司 | A kind of not equal circles sine windings motor of novel list two-layer hybrid formula |
-
2018
- 2018-08-10 CN CN201810909960.8A patent/CN110829660A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61121731A (en) * | 1984-11-16 | 1986-06-09 | Toshiba Corp | Three phase armature winding |
| CN202586559U (en) * | 2012-04-17 | 2012-12-05 | 钱潮轴承有限公司 | Single-and-double-layer concentric windings of stator of drive motor of pure electric bus |
| CN207677535U (en) * | 2018-01-23 | 2018-07-31 | 江门市江晟电机厂有限公司 | A kind of not equal circles sine windings motor of novel list two-layer hybrid formula |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111786488A (en) * | 2020-06-04 | 2020-10-16 | 苏州汇川技术有限公司 | Motor stator and motor |
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Application publication date: 20200221 |