CN105099031B - Threephase motor and the compressor with it - Google Patents
Threephase motor and the compressor with it Download PDFInfo
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- CN105099031B CN105099031B CN201510578731.9A CN201510578731A CN105099031B CN 105099031 B CN105099031 B CN 105099031B CN 201510578731 A CN201510578731 A CN 201510578731A CN 105099031 B CN105099031 B CN 105099031B
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Abstract
The invention discloses a kind of threephase motor and the compressor with it, threephase motor includes stator core, stator core have along its axially through interstitial hole, stator core is provided between multiple circumferentially-spaced stator tooths for opening arrangement along interstitial hole, two neighboring stator tooth and limits stator slot；Winding, winding is whole section waveform winding, winding includes the first phase winding, the second phase winding and third phase winding, first phase winding, the second phase winding and third phase winding include first group of coil and second group of coil respectively, the first group of coil and second group of coil of each phase winding respectively along stator core it is circumferential by predetermined pitch around being located in stator slot, the first group of coil and second group of coil of same phase winding are accommodated in each stator slot respectively.Threephase motor according to embodiments of the present invention, reduce loop length, reduce electric motor resistance so that realize material usage it is low subtract, motor performance lifting, volume reduce effect.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, more particularly, to a kind of threephase motor and the compression with it
Machine.
Background technology
Motor winding terminal portion size, which reduces, to be advantageously reduced cost, improves motor efficiency, and exploitation must be solved
Problem, for carry motor compressor there is also it is same the problem of.
Whole section waveform winding construction is widely used in motor trade, made as known technology at present
It is that one group of coil is set in each stator core slot with the motor of this kind of winding construction, and end turn presses same side
To along stator core circle distribution.It is typically that the inner side winding set after the winding of outside is first set for the ease of production.In order to
Installation space is reserved to inner side winding overhang, outside winding overhang need to set larger height, so as to whole in outside winding coil
It is that inner side winding overhang reserves enough installation spaces after shape.
Simultaneously as the resistance of the polyphase windings of motor is required in electric property has symmetry, inner side winding
The loop length almost identical with outside winding need to be set to, to ensure the symmetry of winding resistance.According to requirements above, outside
And inner side winding is both needed to be set to same larger end size, and then add winding overhang size and resistance so that electronic
Machine cost is improved, motor efficiency reduction.
The content of the invention
It is contemplated that at least solving one of above-mentioned technical problem to a certain extent.
Therefore, the present invention proposes a kind of threephase motor, the threephase motor material usage is few, performance is good.
The present invention also proposes a kind of compressor with above-mentioned threephase motor.
The threephase motor of embodiment according to a first aspect of the present invention, including：Stator core, the stator core has edge
Its axially through interstitial hole, the stator core be provided with multiple circumferentially-spaced stators for opening arrangement along the interstitial hole
Stator slot is limited between tooth, the two neighboring stator tooth；Winding, the winding is whole section waveform winding, the winding bag
Include the first phase winding, the second phase winding and third phase winding, first phase winding, the second phase winding and third phase winding difference
Including first group of coil and second group of coil, first group of coil of each phase winding and second group of coil are respectively along described fixed
Sub- iron core it is circumferential by predetermined pitch around being located in the stator slot, accommodated respectively in each described stator slot it is same around
The first group of coil and second group of coil of group.
Threephase motor according to embodiments of the present invention, by winding be arranged to it is whole section waveform winding, and the first phase winding,
Second phase winding and third phase winding are arranged respectively to two groups of coils, advantageously reduce the out of phase coil of waveform winding and radially hand over
Caused interference space during fork, that is, reduce the avoidance space that outside winding needs to set out, it is possible to reduce loop length, drop
Low electric motor resistance, thus realize material usage it is low subtract, motor performance lifting, volume reduce effect.
In addition, threephase motor according to embodiments of the present invention, can also have technical characteristic additional as follows：
According to one embodiment of present invention, the first group of coil and second group of coil of each phase winding include respectively
Coil edge in the stator slot and the end turn outside the stator slot, the coil edge and the coil
Alternating in wave shape is connected successively for end, and the end turn of first group of coil of each phase winding and described second group
The end turn of coil is relative one by one respectively at the axial two ends of the stator core.
According to one embodiment of present invention, the MgO-ZrO_2 brick of the threephase motor is 1.
According to one embodiment of present invention, in the rotor core radially, first phase winding is located at outermost
Side, the third phase winding is located at most inner side, and second phase winding is located at first phase winding and the third phase winding
Between.
According to one embodiment of present invention, the first group of coil and the length phase of second group of coil of each phase winding
Deng.
According to one embodiment of present invention, pass through between the first group of coil and second group of coil of each phase winding
Transition wire is connected, and the transition wire is located at outside the stator slot.
According to one embodiment of present invention, the first group of coil and second group of coil of each phase winding are in phase negative side
It is coiled into after coil and is embedded in the stator slot upwards.
According to one embodiment of present invention, in the same stator slot, first group of line of same phase winding
Enclose in the inner or outer side for being radially located at second group of coil of the stator core.
The compressor of embodiment, including the threephase motor described in above-described embodiment according to a second aspect of the present invention.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from description of the accompanying drawings below to embodiment is combined
Substantially and be readily appreciated that, wherein：
Fig. 1 is the partial structural diagram of threephase motor according to embodiments of the present invention；
Fig. 2 is each phase winding position distribution schematic diagram of threephase motor according to embodiments of the present invention；
Fig. 3 is that the stator core of threephase motor according to embodiments of the present invention is illustrated with the expansion of a wherein phase winding
Figure；
Fig. 4 is the schematic diagram of two groups of coil windings of a phase winding of threephase motor according to embodiments of the present invention；
Fig. 5 is that two groups of coil combinations of a phase winding of threephase motor according to embodiments of the present invention are a phase winding
Schematic diagram；
Fig. 6 is the end cross-sectional schematic diagram of threephase motor according to embodiments of the present invention
Fig. 7 is position of the two groups of coils of a phase winding of threephase motor according to embodiments of the present invention in stator slot
Schematic diagram；
Fig. 8 is the structural representation of compressor according to embodiments of the present invention.
Reference：
Threephase motor 100；Compressor 200；Shell 201；
Stator core 10；Interstitial hole 11；Stator tooth 12；Stator slot 13；
Winding 20；First phase winding 21；First group of coil 211；Coil edge 2111；End turn 2112；Second group of line
Circle 212；Transition wire 213；Second phase winding 22；Third phase winding 23.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Threephase motor 100 according to embodiments of the present invention is specifically described with reference to accompanying drawing first below.
As shown in Figures 1 to 7, threephase motor 100 according to embodiments of the present invention includes stator core 10 and winding 20,
Wherein, stator core 10 have along its axially through interstitial hole 11, stator core 10 be provided with multiple circumferences along interstitial hole
Stator slot 13 is limited between stator tooth 12 arranged spaced apart, two neighboring stator tooth 12.
Winding 20 is whole section waveform winding, and winding 20 includes the first phase winding 21, the second phase winding 22 and third phase winding
23, the first phase winding 21, the second phase winding 22 and third phase include first group of coil 211 and second group of coil respectively around 23 groups
212, the first group of coil 211 and second group of coil 212 of each phase winding 20 are respectively along the circumference of stator core 10 by predetermined section
Away from first group of coil 211 for around being located in stator slot 13, accommodating same phase winding 20 in each stator slot 13 respectively and
Two groups of coils 212.
In other words, stator core 10 and the structure of winding 20 in this application, mainly to threephase motor 100 is retouched
State, the rotor structure of threephase motor 100 is all appreciated that and easily realized to those skilled in the art, because
This is no longer described in detail.
Specifically, stator core 10 is provided with multiple stator slots 13, and winding 20 is around being located in stator slot 13.Wherein, winding
20 be whole section waveform winding, and is made up of the first phase winding 21, the second phase winding 22 and third phase winding 23, each phase winding
20 are made up of first group of coil 211 and second group of coil 212 respectively, i.e. the first phase winding 21 has first group of coil 211 and the
Two groups of coils 212, the second phase windings 22 have first group of coil 211 and a second group of coil 212, and third phase winding 23 also has the
One group of coil 211 and second group of coil 212, in the following description, by with first group of coil 211 of the first phase winding 21 and
It is specifically described exemplified by two groups of coils 212.
First phase winding 21 is made up of first group of coil 211 and second group of coil 212, and first group of coil 211 and
Two groups of coils 212 respectively along stator core 10 it is circumferential according to predetermined pitch around being located in stator slot 13, first group of He of coil 211
Second group of coil 212 includes the coil edge 2111 being located in stator slot 13 respectively and the axial end from stator core 10 is protruded
End turn 2112, coil edge 2111 and end turn 2112 are alternately set with wave-like in the circumference of stator core 10
Put to form waveform winding, and the whole section winding of the winding 20, i.e., the adjacent coil edge of any two of each group coil
The number for the stator slot 13 being spaced between 2111 on stator core 10 is equal.
For convenience of description, the first group of coil 211 and second group of coil 212 of the first phase winding 21 shown in Fig. 1, remaining
Distributed architecture of two phase windings in stator slot 13 is identical with first phase winding 21.First group of coil 211 and second group in figure
The interior outer fix relation of coil 212 illustrates only for convenient, and the interior outside of two groups of coils can be adjusted flexibly according to actual conditions
Position.
Thus, threephase motor 100 according to embodiments of the present invention, whole section waveform winding is arranged to by winding 20, and
First phase winding 21, the second phase winding 22 and third phase winding 23 are arranged respectively to two groups of coils, advantageously reduce waveform winding
Out of phase coil interference space caused when radially intersecting, that is, reduce the avoidance space that outside winding needs to set out,
Can reduce loop length, reduce electric motor resistance, thus realize material usage it is low subtract, the effect that motor performance lifting, volume reduce
Really.
According to one embodiment of present invention, the first group of coil 211 and second group of coil 212 of each phase winding are wrapped respectively
Include coil edge 2111 and the end turn 2112 outside stator slot 3, coil edge 2111 and line in stator slot 13
Enclosing end 2112, alternating in wave shape is connected successively, and the end turn 2112 and second of first group of coil 211 of each phase winding
The end turn 2112 of group coil 212 is relative one by one respectively at the axial two ends of stator core 10.
Specifically, as shown in figure 1, in this application, in same stator slot 13, first with same phase winding 20
Two coil edge 2111 of group coil 211 and second group of coil 212.By taking the first phase winding 21 as an example, first group of coil 211
Coil edge 2111 is located in multiple stator slots 13 in the circumference of stator core 10, the coil edge of second group of coil 212
2111 also are located in the circumference of stator core 10 in multiple stator slots 13, and the coil edge 2111 of first group of coil 211
It is located at the coil edge 2111 of second group of coil 212 in identical stator slot 13.
End turn 2112 is provided between the adjacent two coil edge 2111 of first group of coil 211, at second group
End turn 2112, first group of coil 211 and second group of line also are provided between the adjacent two coil edge 2111 of coil 212
212 direction of winding in the axial direction of stator core 10 is enclosed on the contrary, the adjacent two coil edge of i.e. first group coil 211
End turn 2112 between 2111, adjacent two coil edge 2111 corresponding with position in second group of coil 212 it
Between end turn 2112 respectively be located at stator core 10 two ends.
As shown in figure 3, Fig. 3 shows the expanded view of the phase winding 21 of stator core 10 and first, the first phase winding 21 is whole
Save waveform winding, be divided into first group of coil 211 and second group of coil 212, two coils in a reverse direction, according to a constant pitch
It is distributed in stator slot 13.
Thus, threephase motor 100 according to embodiments of the present invention, by by first group of coil of each phase winding 20
211 and second group of coil 212 distributed toward two opposite directions, can reduce coil superposition height, so as to further reduce line
Enclose length, reduce electric motor resistance so that realize material usage it is low subtract, motor performance lifting effect.
In certain specific embodiments of the invention, the MgO-ZrO_2 brick of threephase motor 100 is 1.That is,
In this application, the two neighboring coil edge 2111 of first group of coil 211 of each phase winding 20 and second group of coil 212 it
Between be spaced apart two stator slots 13 distance.
According to one embodiment of present invention, in rotor core 10 radially, the first phase winding 21 is located at outermost, the
Three-phase windings 23 are located at most inner side, and the second phase winding 22 is located between the first phase winding 21 and third phase winding 23.
Specifically, as shown in Figure 2 and Figure 6, in this application, the first phase winding 21 is distributed in the outermost of stator core 10,
Third phase winding 23 is distributed in the most inner side of stator core 10, and the second phase winding 22 is distributed in the first phase winding 21 and third phase winding
In the middle of 23.Citing sign has been done in Fig. 2 to the sense of current, wherein, the "×" symbology sense of current of winding in stator slot 13
Inwards, outwards, two coils in each stator slot 13 belong to the vertical paper of " " symbology sense of current vertical paper
In with phase winding and the sense of current is identical.In figure the sense of current only for convenience of description, using when according to actual conditions set electricity
Flow direction.
That is, the end of the first phase winding 21 is distributed in the outermost of stator core 10, the end of third phase winding 23
Portion is distributed in the most inner side of stator core 10, and the end of the second phase winding 22 is distributed in end and the third phase of the first phase winding 21
In the middle of the end of winding 23.The end of first group of coil 211 of each phase winding 20 and the end of second group of coil 212 are with opposite
Direction, the circumference of stator core 10 is distributed according to a constant pitch.
Due to two groups of overhangs of same phase winding 20 being distributed in the opposite direction, it is possible to reduce the axial direction of coil
Thickness, that is, be the reduction of interference space when two-phase winding intersects, that is, reduce the avoidance that outside winding needs to set out
Space.Further, since two groups of coils are distributed toward both direction, it is possible to decrease the superposition height of coil, so that reduce end size,
Reduce winding resistance, improve motor efficiency.
Thus, the arrangement of the three-phase windings 20 of the threephase motor 100 of the structure is more reasonable, can further reduce line
The superposition height of circle, so as to further reduce loop length, reduces electric motor resistance, thus realize material usage it is low subtract, motor
The effect that can be lifted.
Preferably, according to one embodiment of present invention, the first group of coil 211 and second group of coil of each phase winding
212 equal length.That is, the winding length of two coils of each phase winding is substantially the same, it is possible thereby to
So that being more evenly distributed for two coils, can also further reduce the superposition height of coil.
As shown in Figure 4 and Figure 5, according to one embodiment of present invention, first group of coil 211 and second of each phase winding
It is connected between group coil 212 by transition wire 213, transition wire is located at outside stator slot.Further, first group of each phase winding
Coil 211 and second group of coil 212 are embedded in stator slot 13 after being coiled into coil in the opposite direction.
In other words, Fig. 4 is two groups of coils point of the same phase winding 20 of the threephase motor 100 according to the embodiment of the present invention
The schematic diagram of other coiling, by taking the first phase winding 21 as an example, the first group of coil 211 and second group of coil 212 of the first phase winding 21
It is distributed in the opposite direction, i.e. the coiling of first group of coil 211 and second group of coil 212 is in opposite direction in Fig. 4, coiling direction such as arrow
Shown in head.It is attached between first group of coil 211 and second group of coil 212 using transition wire.
Fig. 5 shows that first group of coil 211 and second group of coil 212 in Fig. 4 are combined as the schematic diagram of the first phase winding 21,
First group of coil 211 is superimposed to be combined as the first phase winding 21 with second group of coil 212 by relevant position, is set by production
Coil overlapping portion is embedded into stator slot 13 by standby or handwork, to realize the end turns 2112 of two groups of coils along phase
Opposite direction is distributed and two groups of coil directions or electric current in same stator slot 13 are identical.
Wherein, the overlapping portion of first group of coil 211 and second group of coil 212, refers to first group of coil 211 and second group of line
The coil side for being located at part, i.e. first group of coil 211 in same stator slot 13 in same stator slot 13 of circle 212
The coil edge 2111 of portion 2111 and second group of coil 212 is the overlapping portion of first group of coil 211 and second group of coil 212.
Thus, threephase motor 100 according to embodiments of the present invention, by first group of coil 211 of each phase winding and
Two groups of coilings of coil 212 are embedded on stator core 10 again after completing, and are prepared more convenient, it is ensured that production efficiency.
According to one embodiment of present invention, in same stator slot 13, first group of coil 211 of same phase winding 20
In the inner or outer side for being radially located at second group of coil 212 of stator core 10.
As shown in fig. 7, in this application, by taking the first phase winding 21 as an example, in same stator slot 13, provided with the first phase
First group of coil 211 of winding 21 and two coil edge 2111 of second group of coil 212, wherein, in the footpath of stator core 10
Upwards, the coil edge 2111 of first group of coil 211 can be located at the outside of the coil edge 2111 of second group of coil 212,
Inner side can be located at.Such scheme is a preferred embodiment of the present invention, the coil edge 2111 and of first group of coil 211
The coil edge 2112 of two groups of coils 212 can also be using other position relationship configurations.
As shown in figure 8, compressor 200 according to embodiments of the present invention includes the threephase motor according to above-described embodiment
100, threephase motor 100 is arranged in shell 201, and compressor 200 also includes the compression members, these structures such as bearing, cylinder
All it is appreciated that and easily realizes to those skilled in the art, therefore is not described in detail.
Because threephase motor 100 according to the above embodiment of the present invention has above-mentioned technique effect, therefore, according to this hair
The compressor 200 of bright embodiment also has that corresponding technique effect, i.e. electric motor resistance are low, and material usage is low to be subtracted, motor performance is carried
Rise and volume reduces.
Other of compressor 200 according to embodiments of the present invention are constituted and operated for those of ordinary skill in the art
Speech is all known, is not detailed herein.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are, based on orientation shown in the drawings or position relationship, to be for only for ease of
The description present invention and simplified description, rather than indicate or imply that the device or element of meaning must have specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In the description of the invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；It can be machine
Tool is connected or electrically connected；Can be joined directly together, can also be indirectly connected to by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not direct contact but by it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are directly over second feature and oblique upper, or be merely representative of
Fisrt feature level height is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from the principle and objective of the present invention
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.
Claims (9)
1. a kind of threephase motor, it is characterised in that including：
Stator core, the stator core have along its axially through interstitial hole, the stator core is provided with multiple along institute
State and limit stator slot between the circumferentially-spaced stator tooth for opening arrangement of interstitial hole, the two neighboring stator tooth；
Winding, the winding for it is whole section waveform winding, the winding include the first phase winding, the second phase winding and third phase around
Group, first phase winding, the second phase winding and third phase winding include first group of coil and second group of coil, Mei Yixiang respectively
First group of coil of winding and second group of coil are respectively along the circumferential described around being located at by predetermined pitch of the stator core
In stator slot, the first group of coil and second group of coil of same phase winding are accommodated in each described stator slot respectively.
2. threephase motor according to claim 1, it is characterised in that first group of coil of each phase winding and
Two groups of coils include the coil edge being located in the stator slot and the end turn outside the stator slot, the line respectively
Circle edge is connected with the end turn successively alternating in wave shape, and the coil of first group of coil of each phase winding
End is relative one by one respectively at the axial two ends of the stator core with the end turn of second group of coil.
3. threephase motor according to claim 1, it is characterised in that the MgO-ZrO_2 brick of the threephase motor is
1。
4. threephase motor according to claim 1, it is characterised in that, described in the stator core radially
One phase winding is located at outermost, and the third phase winding is located at most inner side, and second phase winding is located at first phase winding
Between the third phase winding.
5. threephase motor according to claim 1, it is characterised in that first group of coil of each phase winding and
The equal length of two groups of coils.
6. threephase motor according to claim 1, it is characterised in that first group of coil of each phase winding and
It is connected between two groups of coils by transition wire, the transition wire is located at outside the stator slot.
7. threephase motor according to claim 6, it is characterised in that first group of coil of each phase winding and
Two groups of coils are embedded in the stator slot after being coiled into coil in the opposite direction.
8. threephase motor according to claim 1, it is characterised in that in the same stator slot, it is same around
First group of coil of group is in the inner or outer side for being radially located at second group of coil of the stator core.
9. a kind of compressor, it is characterised in that including the threephase motor any one of claim 1-8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3876396A4 (en) * | 2018-10-30 | 2021-11-10 | Mitsubishi Electric Corporation | Stator, electric motor, compressor, air conditioner, and stator manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856359A (en) * | 2015-12-09 | 2017-06-16 | 上海日立电器有限公司 | One kind distribution coiling electric motor |
| CN105515246A (en) * | 2016-01-08 | 2016-04-20 | 广东美芝制冷设备有限公司 | Stator assembly, motor with same, and compressor |
| CN105656225B (en) * | 2016-02-17 | 2018-06-15 | 广东美芝制冷设备有限公司 | Motor and with its compressor |
| FR3061815B1 (en) * | 2017-01-06 | 2021-01-01 | Valeo Equip Electr Moteur | COIL STATOR FOR ROTATING ELECTRIC MACHINE |
| JP6922604B2 (en) * | 2017-09-26 | 2021-08-18 | 日本電産株式会社 | motor |
| CN113839482A (en) * | 2021-09-25 | 2021-12-24 | 松下压缩机(大连)有限公司 | Motor stator and multiphase motor system |
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| CN205039637U (en) * | 2015-09-11 | 2016-02-17 | 广东美芝制冷设备有限公司 | Three phase motor and compressor that has it |
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| JP5279880B2 (en) * | 2011-08-24 | 2013-09-04 | 三菱電機株式会社 | AC generator for vehicles |
| JP5533913B2 (en) * | 2012-02-29 | 2014-06-25 | 株式会社豊田自動織機 | Rotating electric machine stator |
| WO2014034157A1 (en) * | 2012-08-31 | 2014-03-06 | 三菱電機株式会社 | Rotary electric machine and manufacturing method therefor |
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| CN205039637U (en) * | 2015-09-11 | 2016-02-17 | 广东美芝制冷设备有限公司 | Three phase motor and compressor that has it |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3876396A4 (en) * | 2018-10-30 | 2021-11-10 | Mitsubishi Electric Corporation | Stator, electric motor, compressor, air conditioner, and stator manufacturing method |
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