CN112087086B - A short pitch motor stator - Google Patents
A short pitch motor stator Download PDFInfo
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- CN112087086B CN112087086B CN202010974170.5A CN202010974170A CN112087086B CN 112087086 B CN112087086 B CN 112087086B CN 202010974170 A CN202010974170 A CN 202010974170A CN 112087086 B CN112087086 B CN 112087086B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Abstract
本发明提供一种短节距电机定子，包括铁芯及的定子绕组，所述铁芯上开设有48个定子槽，所述定子槽内设置有绝缘纸，所述绝缘纸将所述定子槽在所述铁芯的径向方向从外到内依次分隔为第一层、第二层、第三层和第四层，所述定子绕组具有八个磁极且为六相绕组，所述定子绕组每相包括分别在所述铁芯上绕设一圈的第一绕组线圈、第二绕组线圈、第三绕组线圈和第四绕组线圈。本发明的定子绕组，结构较为紧凑，且有助于降低绕组的端部高度，进而在不改变功率的情况下降低电机的体积，此外，采用六相绕组可以扩大电压电流的选择范围，适配多种控制器，进而优化电机系统性能和成本，且能够提高电机的效率和转矩密度，同时具有容错能力强，可靠性高的特点。
The present invention provides a short-pitch motor stator, including an iron core and a stator winding, wherein the iron core is provided with 48 stator slots, and insulating paper is arranged in the stator slots, and the insulating paper sequentially separates the stator slots into a first layer, a second layer, a third layer and a fourth layer from the outside to the inside in the radial direction of the iron core, and the stator winding has eight magnetic poles and is a six-phase winding, and each phase of the stator winding includes a first winding coil, a second winding coil, a third winding coil and a fourth winding coil respectively wound on the iron core. The stator winding of the present invention has a relatively compact structure, and helps to reduce the end height of the winding, thereby reducing the volume of the motor without changing the power. In addition, the use of a six-phase winding can expand the selection range of voltage and current, adapt to a variety of controllers, thereby optimizing the performance and cost of the motor system, and can improve the efficiency and torque density of the motor, and at the same time has the characteristics of strong fault tolerance and high reliability.
Description
Technical Field
The invention relates to an internal part of a motor, in particular to a short-pitch motor stator.
Background
With the rapid development of automobile technology, particularly electric automobile technology, the power requirement of the automobile motor is also improved, the increase of the power inevitably leads to the increase of the motor volume, however, various devices on the current automobile are more and more, the installation position provided for the motor is more and more narrow and crowded, the power of the current motor can not meet the requirement in a limited space, and therefore, the contradiction problem between the motor volume and the power becomes a technical problem of the high power research and development of the motor.
The Chinese patent of utility model with publication number CN205453323U discloses a motor stator adopting flat copper wires, which replaces traditional round copper wires by adopting flat copper wires, so that the slot filling rate of the motor stator is greatly improved, the structure is compact after winding, the output power is higher, the contradiction between the motor volume and the power can be solved to a certain extent, and the motor stator still needs to be further improved to meet more vehicle installation requirements. Meanwhile, as the motor stator adopts a three-phase winding, the selection range of voltage and current is relatively narrow, and the fault tolerance rate and reliability are relatively low.
In view of the above, the present inventors have conducted intensive studies on the above problems, and have thus produced the present invention.
Disclosure of Invention
The invention aims to provide a whole pitch motor stator which has larger power, smaller volume, wider voltage and current selection range and higher fault tolerance rate and reliability.
In order to achieve the above object, the motor stator of the present invention adopts the following technical scheme:
The short-pitch motor stator comprises an iron core and stator windings wound on the iron core, 48 stator slots are formed in the iron core at equal intervals, and the short-pitch motor stator is characterized in that insulating paper is arranged in the stator slots, the stator slots are sequentially separated into a first layer, a second layer, a third layer and a fourth layer from outside to inside in the radial direction of the iron core by the insulating paper, the stator windings are provided with eight magnetic poles and are six-phase windings, and each phase of the stator windings comprises a first winding coil, a second winding coil, a third winding coil and a fourth winding coil which are respectively wound on the iron core in a circle;
In the same phase, leading-out wires are formed at the head ends of the first winding coil and the third winding coil, neutral point connecting wires are formed at the tail ends of the second winding coil and the fourth winding coil, the two neutral point connecting wires are connected in parallel, the tail end of the first winding coil and the head end of the second winding coil are connected and have the same winding direction, the tail end of the third winding coil and the head end of the fourth winding coil are connected and have opposite winding directions, the winding starting end of the first winding coil is positioned at the fourth layer of the corresponding stator slot, the winding starting end of the second winding coil is positioned at the second layer of the corresponding stator slot, the winding starting end of the third winding coil is positioned at the first layer of the corresponding stator slot, and the winding starting end of the fourth winding coil is positioned at the third layer of the corresponding stator slot.
As an improvement of the present invention, the stator slots where the winding start ends of the first winding coil and the second winding coil are located are adjacent, the stator slots where the winding start ends of the third winding coil and the second winding coil are located are identical, the stator slots where the winding start ends of the fourth winding coil and the first winding coil are located are identical, and five stator slots are spaced between two stator slots wound by the same coil.
As an improvement of the present invention, the first winding coil and the fourth winding coil are alternately wound on the fourth layer and the third layer of each corresponding stator slot, respectively, and the second winding coil and the third winding coil are alternately wound on the second layer and the first layer of each corresponding stator slot, respectively.
As an improvement of the invention, the winding starting end of the first winding coil in each phase is taken as the winding starting end of the corresponding phase, the six-phase winding of the stator winding is respectively a U-phase winding, an a-phase winding, a V-phase winding, a B-phase winding, a W-phase winding and a C-phase winding which are sequentially arranged according to the clockwise or anticlockwise direction, wherein the stator slot at the winding starting end of the U-phase winding is adjacent to the stator slot at the winding starting end of the a-phase winding, the stator slot at the winding starting end of the V-phase winding is adjacent to the stator slot at the winding starting end of the B-phase winding, the stator slot at the winding starting end of the W-phase winding is adjacent to the stator slot at the winding starting end of the C-phase winding, and the stator slot at the winding starting end of the V-phase winding is spaced between the stator slot at the winding starting end of the U-phase winding and the stator slot at the winding starting end of the V-phase winding is spaced between the stator slot at the winding starting end of the V-phase winding and the stator slot at the winding starting end of the V-phase winding.
As an improvement of the present invention, the neutral point connection lines of the U-phase winding, the V-phase winding, and the W-phase winding are connected to each other, and the neutral point connection lines of the a-phase winding, the B-phase winding, and the C-phase winding are connected to each other.
As an improvement of the invention, the first winding coil, the second winding coil, the third winding coil and/or the fourth winding coil comprise more than one wire with an elliptical or square cross section.
As an improvement of the present invention, each of the outgoing lines and each of the neutral point connecting lines are located on the same side of the iron core.
By adopting the technical scheme, the invention has the following beneficial effects:
1. the stator winding provided by the invention has a compact structure, is beneficial to reducing the height of the end part of the winding, further reduces the volume of the motor under the condition of not changing the power, realizes larger power and smaller volume, and can expand the selection range of voltage and current by adopting the six-phase winding, adapt to various controllers, further optimize the performance and cost of the motor system, improve the efficiency and torque density of the motor, and have the characteristics of strong fault tolerance and high reliability.
2. By adopting the conducting wire with the cross section of ellipse or square, the slot filling rate of the motor stator is effectively improved, the material utilization rate of the stator is improved, the copper consumption of the motor is reduced to improve the efficiency of the motor, the height of the end part of the motor winding coil can be effectively reduced, and the volume of the motor is saved.
3. The connecting structure of the neutral point connecting wire is favorable for further improving the efficiency and torque density of the motor.
4. According to the stator winding provided by the invention, the first winding coil, the second winding coil, the third winding coil and the fourth winding coil are arranged in a staggered manner, so that the magnetic field harmonic wave of the motor is improved, the torque fluctuation is reduced, and the efficiency of the motor is improved.
Drawings
FIG. 1 is a schematic view of a partial structure of a core in an embodiment;
FIG. 2 is a schematic diagram showing the development of the U-phase winding and the A-phase winding in the embodiment;
FIG. 3 is a schematic diagram showing the development of the V-phase winding and the B-phase winding in the embodiment;
FIG. 4 is a schematic diagram showing the development of the W-phase winding and the C-phase winding in the embodiment;
fig. 5 is a schematic diagram of a connection structure of neutral point connection lines of a U-phase winding, a V-phase winding, and a W-phase winding in the embodiment;
Fig. 6 is a schematic diagram of a connection structure of neutral point connection lines of a phase winding, a B phase winding and a C phase winding in the embodiment.
The corresponding designations in the figures are as follows:
100-iron core, 110-stator slot;
210-a first winding coil, 220-a second winding coil;
230-third winding coil, 240-fourth winding coil.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples.
As shown in fig. 1 to 6, the present embodiment provides a short-pitch motor stator in which the short pitch means that the pitch of the stator winding of the motor stator is smaller than the pole pitch, and the material is saved and the power factor is high due to the small pitch. The short-pitch motor stator provided in this embodiment includes an iron core 100 and a stator winding wound on the iron core, where 48 stator slots 110 are provided on the iron core 100 at equal intervals, the stator slots 110 may be in a conventional shape, such as rectangular slots, and insulating paper is provided in each stator slot 110, and the insulating paper is also insulating paper used in a conventional motor stator, and separates the corresponding stator slots into a first layer, a second layer, a third layer and a fourth layer in sequence from outside to inside in a radial direction of the iron core 100, where each layer is used for winding a set sub-coil, i.e., one slot four-wire. In order to distinguish between the stator slots 110 at different positions, in the present embodiment, the stator slots 110 are numbered from the 1 st slot to the 72 nd slot in order from any one of the stator slots 110 as a starting point, and in order to distinguish between the number of the stator slots 110 and the part number of the motor stator, in the present embodiment and fig. 1 to 6, the numbers of three digits represent the part number of the motor stator, and the numbers of one digit and two digits represent the number of the stator slots 110.
The stator winding is provided with eight magnetic poles and is a six-phase winding, and the six-phase winding of the stator winding is a U-phase winding, an A-phase winding, a V-phase winding, a B-phase winding, a W-phase winding and a C-phase winding which are sequentially arranged at the winding starting end in a clockwise or anticlockwise manner.
Each phase of the stator winding comprises a first winding coil 210, a second winding coil 220, a third winding coil 230 and a fourth winding coil 240 which are wound on the iron core 100 in a circle, leading wires are formed at the head ends of the first winding coil 210 and the third winding coil 230 in the same phase, neutral point connecting wires are formed at the tail ends of the second winding coil 220 and the fourth winding coil 240, the tail ends of the first winding coil 210 and the head ends of the second winding coil 220 are connected and the winding directions of the first winding coil 210 and the second winding coil are the same (in a anticlockwise manner in the embodiment), the tail ends of the third winding coil 230 and the head ends of the fourth winding coil 240 are connected and the winding directions of the first winding coil 210 and the fourth winding coil are opposite to the first winding coil 210 (in a clockwise direction), and for convenience of description, the first winding coil 210 and the second winding coil 220 which are mutually connected in series are sequentially U1, A1, V1, B1, W1, C1, U2, and W2 are sequentially connected in series with each other in the U2, and the fourth winding coil 240 is sequentially connected in the winding directions of the U2. The winding coils are formed by mutually welding hairpin type plug-ins, the winding coils which are mutually connected in series are connected through overwires, and the winding coils formed by mutually welding hairpin type plug-ins are widely applied to various motor stators for vehicles, and are not the key points of the embodiment, and are not described in detail here.
Preferably, the first winding coil 210, the second winding coil 220, the third winding coil 230 and/or the fourth winding coil 240 include more than one wire with an oval or square cross section, and in this embodiment, flat copper wires, i.e. copper wires with an oval or square cross section, are used, which are easy to install, have better stability and are beneficial to improving the slot filling rate of the stator winding. In addition, each outgoing line and each neutral point connecting line are located on the same side of the core 100, so that connection is facilitated.
The winding start end (i.e., the position wound in the stator slot 110 and directly connected to the lead-out wire) of the first winding coil 210 is located at the fourth layer of the corresponding stator slot 110, the winding start end (i.e., the head end) of the second winding coil is located at the second layer of the corresponding stator slot 110, the winding start end (i.e., the position wound in the stator slot 110 and directly connected to the lead-out wire) of the third winding coil is located at the first layer of the corresponding stator slot 100, and the winding start end (i.e., the head end) of the fourth winding coil is located at the third layer of the corresponding stator slot 110. Preferably, in the same phase, the stator slots 110 where the winding ends of the first winding coil 210 and the second winding coil 220 are located are adjacent (i.e., there are no other stator slots 110 between the two stator slots 110), the stator slots 110 where the winding ends of the third winding coil 230 and the second winding coil 220 are located are identical, the stator slots 110 where the winding ends of the fourth winding coil 240 and the first winding coil 210 are located are identical, and five stator slots 110 are spaced between two stator slots 110 wound by the same winding. Further, the first winding coil 210 and the fourth winding coil 240 are alternately wound on the fourth layer and the third layer of the corresponding stator slot 110, respectively, and the second winding coil 220 and the third winding coil 230 are alternately wound on the second layer and the first layer of the corresponding stator slot 110, respectively. In addition, the winding start end of the first winding coil 210 in each phase is taken as the winding start end of the corresponding phase, the stator slot 110 where the winding start end of the U-phase winding is located is adjacent to the stator slot where the winding start end 110 of the a-phase winding is located, the stator slot 110 where the winding start end of the V-phase winding is located is adjacent to the stator slot 110 where the winding start end of the B-phase winding is located, the stator slot 110 where the winding start end of the W-phase winding is adjacent to the stator slot 110 where the winding start end of the C-phase winding is located, and three stator slots 110 are respectively arranged between the stator slot 110 where the winding start end of the U-phase winding is located and the stator slot 110 where the winding start end of the V-phase winding is located and between the stator slot 110 where the winding start end of the V-phase winding is located and the stator slot 110 where the winding start end of the W-phase winding is located.
Specifically, in this embodiment, U1 winds in the counterclockwise direction, its winding start end (i.e., the winding start end of the corresponding first winding coil 210) is located at the fourth layer of the fourth slot 9, then its winding stop end (i.e., the winding position in the stator slot 110 and directly connected to the neutral point connecting line) is located at the first layer of the fourth slot 2, U2 winds clockwise, its winding start end is located at the first layer of the fourth slot 8, then its winding stop end is located at the fourth layer of the fourth slot 15, A1 winds counterclockwise, its winding start end is located at the fourth layer of the fourth slot 8, then its winding stop end is located at the first layer of the first slot 1, A2 winds clockwise, its winding start end is located at the first layer of the fourth slot 7, then its winding stop end is located at the fourth layer of the fourth slot 14, V1 winds counterclockwise, its winding start end is located at the fourth layer of the fourth slot 13, then its winding stop end is located at the first layer of the fourth slot 6, V2 winds clockwise, its winding start end is located at the first layer of the fourth slot 12, then its winding stop end is located at the fourth layer of the fourth slot 19, B1 winds counterclockwise, B1 winds anticlockwise, B1 winds around the fourth layer of the fourth slot 11, and its winding start end is located at the fourth slot 11, its winding start end is located at the fourth layer of the fourth slot 11, and its winding stop end is located at the fourth slot 11, its winding stop end is located at the fourth slot 1, and the fourth slot 1, its winding stop end is located at the fourth slot 1, and the fourth slot is located at the fourth layer of the fourth slot, and the winding stop end is located at the clockwise winding end, and the winding stop end is located at the fourth slot is clockwise winding end, and clockwise winding end is located at the winding end is clockwise winding was clockwise.
As shown in fig. 5 and 6, two neutral point connection lines in the same phase are connected in parallel, and neutral point connection lines of the U-phase winding, the V-phase winding, and the W-phase winding are connected to each other, and neutral point connection lines of the a-phase winding, the B-phase winding, and the C-phase winding are connected to each other.
The present invention has been described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention according to the prior art, which are all within the scope of the present invention.
Claims (5)
1. The short-pitch motor stator comprises an iron core and stator windings wound on the iron core, 48 stator slots are formed in the iron core at equal intervals, and the short-pitch motor stator is characterized in that insulating paper is arranged in the stator slots, the stator slots are sequentially separated into a first layer, a second layer, a third layer and a fourth layer from outside to inside in the radial direction of the iron core by the insulating paper, the stator windings are provided with eight magnetic poles and are six-phase windings, and each phase of the stator windings comprises a first winding coil, a second winding coil, a third winding coil and a fourth winding coil which are respectively wound on the iron core in a circle;
in the same phase, leading-out wires are formed at the head ends of the first winding coil and the third winding coil, neutral point connecting wires are formed at the tail ends of the second winding coil and the fourth winding coil, and the two neutral point connecting wires are connected in parallel; the tail end of the first winding coil is connected with the head end of the second winding coil, the winding directions of the tail end of the third winding coil and the head end of the fourth winding coil are the same, the winding directions of the tail end of the third winding coil and the head end of the fourth winding coil are opposite to the winding directions of the first winding coil, the winding starting end of the first winding coil is positioned on the fourth layer of the corresponding stator slot, the winding starting end of the second winding coil is positioned on the second layer of the corresponding stator slot, the winding starting end of the third winding coil is positioned on the first layer of the corresponding stator slot, and the winding starting end of the fourth winding coil is positioned on the third layer of the corresponding stator slot;
The stator slots where the winding starting ends of the first winding coil and the second winding coil are located are adjacent, the stator slots where the winding starting ends of the third winding coil and the second winding coil are located are identical, the stator slots where the winding starting ends of the fourth winding coil and the first winding coil are located are identical, and five stator slots are arranged between two stator slots wound by the same winding at intervals;
The first winding coil and the fourth winding coil are respectively and alternately wound on the fourth layer and the third layer of each corresponding stator slot, and the second winding coil and the third winding coil are respectively and alternately wound on the second layer and the first layer of the corresponding stator slot.
2. The short-pitch motor stator according to claim 1, wherein the winding start of the first winding coil in each phase is the winding start of the corresponding phase, the six-phase windings of the stator winding are respectively a U-phase winding, an a-phase winding, a V-phase winding, a B-phase winding, a W-phase winding and a C-phase winding which are sequentially arranged clockwise or counterclockwise, wherein the stator slot where the winding start of the U-phase winding is located is adjacent to the stator slot where the winding start of the a-phase winding is located, the stator slot where the winding start of the V-phase winding is located is adjacent to the stator slot where the winding start of the B-phase winding is located, the stator slot where the winding start of the W-phase winding is located is adjacent to the stator slot where the winding start of the C-phase winding is located, and the stator slot where the winding start of the U-phase winding is located is adjacent to the stator slot where the winding start of the V-phase winding is located, and the stator slot where the winding start of the V-phase winding is located.
3. The short-pitch motor stator as claimed in claim 2, wherein the neutral point connection lines of the U-phase winding, the V-phase winding and the W-phase winding are connected to each other, and the neutral point connection lines of the a-phase winding, the B-phase winding and the C-phase winding are connected to each other.
4. The short-pitch motor stator of claim 1 wherein the first winding coil, the second winding coil, the third winding coil and/or the fourth winding coil comprise more than one wire having an elliptical or square cross-section.
5. The short-pitch motor stator according to claim 1, wherein each of the lead wires and each of the neutral point connecting wires are located on the same side of the core.
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|---|---|---|---|
| CN202010974170.5A CN112087086B (en) | 2020-09-16 | 2020-09-16 | A short pitch motor stator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010974170.5A CN112087086B (en) | 2020-09-16 | 2020-09-16 | A short pitch motor stator |
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| CN112087086A CN112087086A (en) | 2020-12-15 |
| CN112087086B true CN112087086B (en) | 2024-12-31 |
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| CN212435461U (en) * | 2020-09-16 | 2021-01-29 | 福建艺达电驱动股份有限公司 | A short pitch motor stator |
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| CN110011450B (en) * | 2019-03-27 | 2024-08-02 | 汇川新能源汽车技术(常州)有限公司 | Stator assembly and driving motor |
| CN110086279A (en) * | 2019-05-24 | 2019-08-02 | 浩夫尔动力总成（上海）有限公司 | A kind of flat type copper wire driving motor armature winding structure that multilayer is equidistant |
| CN111371223B (en) * | 2020-04-20 | 2021-01-29 | 株洲中车时代电气股份有限公司 | Stator winding, stator with same, motor and vehicle |
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| CN212435461U (en) * | 2020-09-16 | 2021-01-29 | 福建艺达电驱动股份有限公司 | A short pitch motor stator |
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