CN110768403B - Stator assembly, permanent magnet motor, compressor, fan and air conditioner - Google Patents
Stator assembly, permanent magnet motor, compressor, fan and air conditioner Download PDFInfo
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- CN110768403B CN110768403B CN201810845370.3A CN201810845370A CN110768403B CN 110768403 B CN110768403 B CN 110768403B CN 201810845370 A CN201810845370 A CN 201810845370A CN 110768403 B CN110768403 B CN 110768403B
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- 238000004804 winding Methods 0.000 claims abstract description 99
- 230000007704 transition Effects 0.000 claims abstract description 97
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 description 13
- 238000007906 compression Methods 0.000 description 13
- 230000007246 mechanism Effects 0.000 description 8
- 230000006872 improvement Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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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
- H02K3/18—Windings for salient poles
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Windings For Motors And Generators (AREA)
Abstract
The invention discloses a stator assembly, a permanent magnet motor, a compressor, a fan and an air conditioner, wherein the stator assembly comprises a stator core, stator windings and an insulating end plate, the stator core comprises a plurality of stator teeth, stator slots are defined between two adjacent stator teeth, the stator windings comprise multiphase windings, each phase winding comprises at least one coil group, the coils comprise a plurality of coils, the coils are adjacently arranged along the circumferential direction of the stator core, two adjacent coils in the coil groups are connected through a first transition line, and the current directions of the two adjacent coils in the common stator slots are the same. The insulating end plates are two, one end of the first transition line is connected with one of the two adjacent coils, and the other end of the first transition line is transited from the insulating end plates to be connected with the other of the two adjacent coils. According to the stator assembly, the slot filling rate is effectively improved, and meanwhile, the use reliability of stator winding is guaranteed.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a stator assembly, a permanent magnet motor, a compressor, a fan and an air conditioner.
Background
The frequency conversion air conditioner, the compressor and the fan are efficient and miniaturized and are the technical direction of the industry. The pole numbers of the permanent magnet motor of the variable frequency compressor or the DC fan are mainly 4 poles and 6 poles, so that the improvement of the power density and the efficiency of the permanent magnet motor is limited.
In the related art, by improving the structure of the permanent magnet motor and the like, the power density and the efficiency of the permanent magnet motor are greatly improved compared with those of the traditional motor, however, the permanent magnet motor has unreasonable structure, and the improvement of the full rate of the stator slots is limited, so that the improvement of the power density and the efficiency of the permanent magnet motor is limited.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a stator assembly that effectively improves the slot filling rate while ensuring the reliability of use of the stator winding.
Another object of the present invention is to provide a permanent magnet motor having the above stator assembly.
It is still another object of the present invention to provide a compressor having the above permanent magnet motor.
Still another object of the present invention is to provide a fan having the above permanent magnet motor.
It is still another object of the present invention to provide an air conditioner having at least one of the above compressor and the above blower.
A stator assembly according to an embodiment of the first aspect of the present invention includes: the stator core comprises a plurality of stator teeth, the plurality of stator teeth are arranged along the circumferential direction of the stator core, and stator slots are defined between two adjacent stator teeth; the stator winding comprises a multi-phase winding, each phase of winding comprises at least one coil group, each coil group comprises a plurality of coils, the coils are adjacently arranged along the circumferential direction of the stator core, each coil is correspondingly wound on the stator teeth, two adjacent coils in the coil groups are connected through a first transition line, and the current directions of the two adjacent coils in the shared stator slot are the same; the two insulating end plates are respectively arranged at two axial ends of the stator core, one end of the first transition line is connected with one of the two adjacent coils, and the other end of the first transition line is transited from the insulating end plates to be connected with the other of the two adjacent coils.
According to the stator assembly provided by the embodiment of the invention, the first transition line between two adjacent coils in the coil assembly is transited through the insulating end plate instead of transiting in the stator slot, so that the slot filling rate of the stator assembly is effectively improved, the risk that the first transition line is scratched or broken by a winding nozzle is avoided, the first transition line is effectively protected, and the use reliability of the stator winding is ensured; when the stator assembly is applied to the permanent magnet motor, the power density and the efficiency of the permanent magnet motor can be effectively improved, and the miniaturization of the permanent magnet motor is facilitated.
According to some embodiments of the invention, the winding directions of two adjacent coils in the coil group are opposite.
According to some embodiments of the invention, at least one of the two insulating end plates has a stopper thereon, the stopper including at least one of a wire passing groove group and a stopper protrusion to define the displacement of the first transition wire.
According to some embodiments of the invention, the insulating end plate comprises: the first wire passing portion, spacing portion includes a plurality of wire passing groove group, a plurality of wire passing groove group is followed stator core's circumference interval sets up, every wire passing groove group includes two wire passing grooves, two wire passing grooves all form on the first wire passing portion and along stator core's circumference interval sets up, every wire passing groove is followed stator core's radial run through first wire passing portion, wire passing groove keep away from stator core's one side is opened, the both ends of first wire passing groove pass respectively two wire passing groove group pass the wire passing groove with the coil links to each other.
According to some embodiments of the invention, the insulating end plate comprises: the second wire passing part, the spacing portion includes a plurality of spacing arch, spacing arch is established on the periphery wall of second wire passing part, first transition ply-yarn drill is established on the spacing arch.
According to some embodiments of the invention, the insulating end plate comprises: the limiting part comprises a plurality of wire passing groove groups and a plurality of limiting protrusions, each wire passing groove group comprises at least one wire passing groove, when each wire passing groove group comprises one wire passing groove, one end of each first transition wire penetrates through each wire passing groove to be connected with one of two adjacent coils, and the other end of each first transition wire is clamped on each limiting protrusion to be connected with the other of the two adjacent coils; when the wire passing groove group comprises two wire passing grooves, the limiting protrusion is positioned between the two wire passing grooves of the wire passing groove group in the circumferential direction of the stator core.
According to some embodiments of the invention, each set of windings has a plurality of winding joints on the same side or different sides of the stator core than the first transition line.
According to some embodiments of the invention, each phase of the winding comprises one of the coil sets comprising two or three of the coils.
According to some embodiments of the invention, each phase of the winding comprises two coil groups, the two coil groups being arranged opposite each other in a radial direction of the stator core.
According to some embodiments of the invention, the two coil sets are connected by a second transition line, one end of the second transition line is connected to one of the two coil sets, and the other end of the second transition line is transited from the insulating end plate to be connected to the other of the two coil sets.
A permanent magnet machine according to an embodiment of the second aspect of the invention comprises a stator assembly according to an embodiment of the first aspect of the invention described above.
According to the permanent magnet motor provided by the embodiment of the invention, the stator assembly is adopted, so that the power density and the efficiency of the permanent magnet motor can be effectively improved, and the miniaturization of the permanent magnet motor is facilitated.
A compressor according to an embodiment of the third aspect of the present invention includes a permanent magnet motor according to an embodiment of the above second aspect of the present invention.
According to the compressor provided by the embodiment of the invention, the permanent magnet motor is adopted, so that the compressor can be efficient and miniaturized.
A fan according to an embodiment of a fourth aspect of the present invention comprises a permanent magnet motor according to an embodiment of the above second aspect of the present invention.
According to the fan provided by the embodiment of the invention, the permanent magnet motor is adopted, so that the fan can be efficient and miniaturized.
An air conditioner according to an embodiment of a fifth aspect of the present invention includes at least one of a compressor according to an embodiment of the above-described third aspect of the present invention and a blower according to an embodiment of the above-described fourth aspect of the present invention.
According to the air conditioner provided by the embodiment of the invention, the high efficiency and energy conservation of the air conditioner can be realized by adopting at least one of the compressor and the fan.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural view of a stator assembly according to an embodiment of the present invention;
FIG. 2 is a schematic view of a partial structure of a stator assembly according to an embodiment of the present invention, wherein the forked schematic representation in the stator winding shows the current flow inward toward the paper and the dotted representation in the stator winding shows the current flow outward toward the paper;
FIG. 3 is a schematic view of a partial structure of a stator assembly according to another embodiment of the present invention, wherein the forked schematic representation in the stator winding shows current flow inward toward the paper and the dots in the stator winding show current flow outward toward the paper;
FIG. 4 is a schematic diagram of a comparison of slot fill ratio of a stator assembly according to an embodiment of the present invention with a stator assembly of conventional technology;
FIG. 5 is a schematic structural view of a stator assembly according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a stator assembly according to another embodiment of the present invention;
Fig. 7 is a schematic structural view of an insulating end plate according to an embodiment of the present invention;
fig. 8 is a schematic structural view of an insulating end plate according to another embodiment of the present invention;
FIG. 9 is another partial structural schematic of a stator assembly according to an embodiment of the present invention;
fig. 10 is a schematic structural view of a permanent magnet motor according to an embodiment of the present invention;
fig. 11 is a sectional view of a compressor according to an embodiment of the present invention.
Reference numerals:
compressor 300, casing 201, air inlet 201a, air outlet 201b, crankshaft 202, compression mechanism 203,
Cylinder 203a, main bearing 203b, sub-bearing 203c, piston 203d,
Permanent magnet motor 200,
Rotor assembly 101, rotor core 101a, permanent magnet 101b,
Stator assembly 100, central axis 100a of stator assembly
Stator core 1, stator slot 10, stator teeth 11, yoke 11a, tooth 11b,
Stator winding 2, winding joint 20, coil group 21, coil 211, first transition line 211a, second transition line 211b,
A first via-line portion 30a, a second via-line portion 30b, a third via-line portion 30c,
A first insulating end plate 31, a second insulating end plate 32,
A limit part 33, a wire passing groove group 331, a wire passing groove 331a, a limit protrusion 332,
Mounting post 34, guide 341, insulator 4.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
A stator assembly 100 according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1-9.
As shown in fig. 1 to 9, a stator assembly 100 according to an embodiment of the present invention includes a stator core 1, stator windings 2, and insulating end plates.
The stator core 1 comprises a plurality of stator teeth 11, the plurality of stator teeth 11 are arranged along the circumferential direction of the stator core 1, a stator slot 10 is defined between two adjacent stator teeth 11, the stator winding 2 comprises a multi-phase winding, each phase winding comprises at least one coil group 21, the coil groups 21 comprise a plurality of coils 211, the plurality of coils 211 are adjacently arranged along the circumferential direction of the stator core 1, each coil 211 is correspondingly wound on the stator teeth 11, two adjacent coils 211 in the coil groups 21 are connected through a first transition line 211a, and the current directions of the two adjacent coils 211 in the common stator slot 10 are the same. The two insulating end plates are respectively arranged at two axial ends of the stator core 1, one end of the first transition line 211a is connected with one of the two adjacent coils 211, and the other end of the first transition line 211a is transited from the insulating end plates to be connected with the other of the two adjacent coils 211.
For example, as shown in fig. 1 to 9, the stator core 1 may be formed in a substantially annular structure, each stator tooth 11 includes a yoke portion 11a and a tooth portion 11b disposed along a radial direction of the stator core 1, the yoke portions 11a of the plurality of stator teeth 11 are sequentially connected end to form an annular stator yoke, the yoke portions 11a of two adjacent stator teeth 11 are connected, the tooth portions 11b of the plurality of stator teeth 11 are disposed at intervals along a circumferential direction of the stator core 1, and the stator winding 2 may be wound around the tooth portions 11b of the stator teeth 11 to be located in the stator slots 10.
The stator winding 2 can adopt a centralized double-layer winding, the winding can be three-phase, each phase winding comprises one or more coil groups 21, each coil group 21 comprises a plurality of coils 211, the coils 211 of the coil groups 21 are adjacently arranged along the circumferential direction of the stator core 1, each coil 211 is correspondingly wound on one stator tooth 11, that is, the number of the coils 211 is equal to the number of the stator teeth 11, a plurality of stator teeth 11 corresponding to the coil groups 21 are adjacently arranged along the circumferential direction of the stator core 1, and the inside of each stator slot 10 is provided with wires of two adjacent coils 211; the current direction of adjacent two coils 211 in the coil group 21 on the conductors in the common stator slot 10 is the same to facilitate the arrangement of windings for each phase.
Two insulating end plates are respectively arranged at the end surfaces of the two axial ends of the stator core 1, each insulating end plate is formed into an insulating framework with certain hardness so as to fix the stator winding 2, and the structures of the two insulating end plates can be the same or different; the two insulating end plates may be a first insulating end plate 31 and a second insulating end plate 32, respectively, the first insulating end plate 31 may be provided at one axial end (e.g., upper end in fig. 5 and 6) of the stator core 1, and the second insulating end plate 32 may be provided at the other axial end (e.g., lower end in fig. 5 and 6) of the stator core 1; the two coils 211 of each coil group 21 can be connected through the first transition line 211a, that is, one end of the first transition line 211a is connected with one of the two adjacent coils 211, the other end of the first transition line 211a is connected with the other of the two adjacent coils 211, and the other end of the first transition line 211a is transited by the insulating end plate, so that the first transition line 211a can be penetrated on the insulating end plate, the first transition line 211a is prevented from obliquely crossing the stator slot 10 which is common to the two adjacent coils 211, the first transition line 211a is prevented from occupying the stator slot 10, the slot filling rate of the stator assembly 100 is effectively improved, and meanwhile, as the first transition line 211a transits through the insulating end plate instead of transiting in the stator slot 10, the first transition line 211a is prevented from being scratched or scraped by the winding nozzle when the winding nozzle stretches into the coil 211 in the stator slot 10 in the winding process of the stator assembly 100, thereby effectively protecting the reliability of the first transition line 211a 2; as can be seen in fig. 4, the slot fill rate of the stator assembly 100 of the present application is 85% which is significantly higher than the slot fill rate of the prior art stator assembly of 70%. When the stator assembly 100 is applied to a permanent magnet motor, the power density and efficiency of the permanent magnet motor can be effectively improved, and meanwhile, the miniaturization of the permanent magnet motor can be realized.
Here, the "slot filling rate" may designate a percentage of the sum of sectional areas of the stator winding 2 within the stator slot 10 to the sectional area of the stator slot 10; the first transition line 211a may make a transition through either one of the two insulating end plates.
According to the stator assembly 100 of the embodiment of the invention, the slot filling rate of the stator assembly 100 is effectively improved by transiting the first transition line 211a between two adjacent coils 211 in the coil assembly 21 through the insulating end plate instead of transiting in the stator slot 10, meanwhile, the risk that the first transition line 211a is scratched or broken by a winding nozzle is avoided, the first transition line 211a is effectively protected, and the use reliability of the stator winding 2 is ensured; when the stator assembly 100 is applied to a permanent magnet motor, the power density and efficiency of the permanent magnet motor can be effectively improved, and meanwhile, the miniaturization of the permanent magnet motor can be realized.
Specifically, the winding directions of the adjacent two coils 211 in the coil assembly 21 are opposite, so that the coil assembly 21 is convenient to continuously wind, and the winding efficiency of the stator assembly 100 is improved. For example, when the coil group 21 includes two coils 211, the winding directions of the two coils 211 are opposite; when the coil group 21 includes three coils 211, the winding direction of the middle one of the three coils 211 is opposite to the winding direction of the remaining two of the three coils 211.
Here, when it is to be noted that the "winding direction of the coil 211" may be taken along the radial direction of the corresponding stator tooth 11, from inside to outside, or from outside to inside, the direction "outside" refers to a direction away from the central axis 100a of the stator assembly, and the opposite direction is defined as "inside", "the axial direction of the stator core 1" being parallel to the extending direction of the central axis 100a of the permanent magnet motor. For example, in the example of fig. 1, the upper coil group 21 includes two coils 211, and the upper coil group 21 may be wound with the right coil 211 first and then with the left coil 211, and the winding direction of the left coil 211 of the upper coil group 21 is counterclockwise as viewed from inside to outside in the radial direction of the corresponding stator teeth 11, and the winding direction of the right coil 211 of the upper coil group 21 is clockwise as viewed from inside to outside in the radial direction of the corresponding stator teeth 11. For another example, in the example of fig. 3, the coil group 21 includes three coils 211, the winding order may be a right coil 211, a middle coil 211, and a left coil 211 in this order, that is, the right coil 211 is wound first, the middle coil 211 is wound again, and the left coil 211 is wound last, assuming that the current direction in fig. 3 coincides with the winding direction, the winding direction of the right coil 211 is clockwise as viewed from inside to outside in the radial direction of the right stator tooth 11, the winding direction of the middle coil 211 is counterclockwise as viewed from inside to outside in the radial direction of the middle stator tooth 11, and the winding direction of the left coil 211 is clockwise as viewed from inside to outside in the radial direction of the left stator tooth 11.
Alternatively, at least one of the two insulating end plates has a stopper 33 thereon, that is, only the first insulating end plate 31 has the stopper 33 thereon and the second insulating end plate 32 has no stopper 33 thereon, or only the second insulating end plate 32 has the stopper 33 thereon and the first insulating end plate 31 has no stopper 33 thereon, or both the first insulating end plate 31 and the second insulating end plate 32 have the stopper 33 thereon. Wherein the limiting part 33 includes at least one of the wire passing groove group 331 and the limiting protrusion 332, that is, the limiting part 33 may include the wire passing groove group 331 without including the limiting protrusion 332, or the limiting part 33 may include the limiting protrusion 332 without including the wire passing groove group 331, or the limiting part 33 may include the wire passing groove group 331 and the limiting protrusion 332. Therefore, the wire passing groove group 331 and/or the limiting protrusion 332 are/is arranged on at least one of the two insulating end plates to limit the displacement of the first transition wire 211a, so that the limiting of the first transition wire 211a is realized, the position stability of the first transition wire 211a on the insulating end plates is ensured, the first transition wire 211a is prevented from being separated from the insulating end plates to influence the winding or the use of the stator assembly 100, and the use reliability of the stator assembly 100 is ensured.
In some alternative embodiments of the present invention, in the example of fig. 6 and 7, the insulating end plate includes a first wire passing portion 30a, the first wire passing portion 30a may be formed in a substantially cylindrical structure, the limiting portion 33 includes a plurality of wire passing groove groups 331, the plurality of wire passing groove groups 331 are arranged at intervals along the circumferential direction of the stator core 1, each wire passing groove group 331 includes two wire passing grooves 331a, the two wire passing grooves 331a are formed on the first wire passing portion 30a and the two wire passing grooves 331a are arranged at intervals along the circumferential direction of the stator core 1, and both ends of the first wire passing groove 211a respectively pass through the two wire passing grooves 331a of the wire passing groove group 331 to be connected to the coil 211; each of the line passing grooves 331a penetrates the first line passing portion 30a in the radial direction of the stator core 1, that is, each of the line passing grooves 331a penetrates the inner and outer circumferential walls of the first line passing portion 30a in the radial direction of the stator core 1, the line passing groove 331a may be formed by a portion of an end surface of the first line passing portion 30a, which is far from the center of the stator core 1, being recessed toward the center of the stator core 1 such that a side of the line passing groove 331a, which is far from the stator core 1, is open, and the first line passing 211a may be placed in the line passing groove 331a from the open side of the line passing groove 331a, thereby facilitating arrangement of the first line passing 211a, and further facilitating winding of the coil group 21. In the arrangement process of the first transition line 211a, the first transition line 211a can pass through one of the two wire passing grooves 331a in the wire passing groove group 331 from inside to outside, then pass through the outer peripheral wall of the first wire passing portion 30a, and then pass through the other of the two wire passing grooves 331a in the wire passing groove group 331 from outside to inside to be connected with the coil 211, so that the limit effect of the wire passing groove group 331 is ensured, meanwhile, the stator assembly 100 has a larger winding space, and the winding of the stator winding 2 is facilitated. The insulating end plate may be the first insulating end plate 31 or the second insulating end plate 32.
In other alternative embodiments of the present invention, the insulating end plate includes the second wire passing portion 30b, the second wire passing portion 30b may be formed in a substantially cylindrical structure, the limiting portion 33 includes a plurality of limiting protrusions 332, the plurality of limiting protrusions 332 may be disposed at intervals along the circumferential direction of the stator core 1, the limiting protrusions 332 are disposed on the outer circumferential wall of the second wire passing portion 30b, the limiting protrusions 332 may be formed by protruding a portion of the outer circumferential wall of the second wire passing portion 30b outward, so that the first transition wire 211a may be clamped on the limiting protrusions 332 when the first transition wire 211a is transited from the outer circumferential wall of the first wire passing portion 30a, thereby realizing the limitation of the first transition wire 211a, and simultaneously enabling the stator assembly 100 to have a larger winding space, so as to facilitate the winding of the stator winding wire 2. The insulating end plate may be the first insulating end plate 31 or the second insulating end plate 32.
It can be appreciated that, in this case, the shape of the limiting protrusion 332 may be specifically set according to practical needs, for example, the limiting protrusion 332 may be approximately a bump or may be formed into a hook shape, but the present invention is not limited thereto, and only needs to ensure that the first transition line 211a may be clamped on the limiting protrusion 332 without falling off.
In still other alternative embodiments of the present invention, the insulating end plate includes a third wire passing portion 30c, and the third wire passing portion 30c may be formed in a substantially cylindrical structure, and the stopper portion 33 includes a plurality of wire passing groove groups 331 and a plurality of stopper protrusions 332, the plurality of wire passing groove groups 331 being disposed at intervals along the circumferential direction of the stator core 1, each wire passing groove group 331 including at least one wire passing groove 331a. The insulating end plate may be the first insulating end plate 31 or the second insulating end plate 32. For example, in the example of fig. 8, the wire passing groove group 331 includes one wire passing groove 331a, the wire passing groove 331a penetrating the third wire passing portion 30c in the radial direction of the stator core 1, that is, each wire passing groove 331a penetrating the inner and outer circumferential walls of the third wire passing portion 30c in the radial direction of the stator core 1, the wire passing groove 331a may be formed by a portion of an end surface of the third wire passing portion 30c away from the center of the stator core 1 being recessed toward the center of the stator core 1 such that a side of the wire passing groove 331a away from the stator core 1 is opened, and the first transition wire 211a may be placed in the wire passing groove 331a from the opened side of the wire passing groove 331 a; one end of the first transition line 211a passes through the transition groove 331a to be connected with one of the adjacent two coils 211, the other end of the first transition line 211a is clamped on the limiting protrusion 332 to be connected with the other of the adjacent two coils 211, that is, the first transition line 211a can pass through the transition groove 331a from inside to outside and then is transited by the outer circumferential wall of the third transition line portion 30c to be clamped on at least one of the limiting protrusions 332, and then is transited from outside to inside to be connected with the coil 211 through the end surface of the third transition line portion 30c, so that the limiting of the first transition line 211a is realized under the combined action of the transition groove 331a and the limiting protrusion 332.
For another example, in the example of fig. 5, the passing groove group 331 includes two passing grooves 331a, the two passing grooves 331a are formed on the first passing portion 30a and the two passing grooves 331a are disposed at intervals along the circumferential direction of the stator core 1, the limit protrusion 332 is located between the two passing grooves 331a of the passing groove group 331 in the circumferential direction of the stator core 1, and both ends of the first passing line 211a respectively pass through the two passing grooves 331a of the passing groove group 331 to be connected to the coil 211; each of the wire passing grooves 331a penetrates the third wire passing portion 30c in the radial direction of the stator core 1, that is, each of the wire passing grooves 331a penetrates the inner and outer circumferential walls of the third wire passing portion 30c in the radial direction of the stator core 1, the wire passing groove 331a may be formed by a portion of an end surface of the third wire passing portion 30c, which is remote from the center of the stator core 1, being recessed toward the center of the stator core 1 such that a side of the wire passing groove 331a, which is remote from the stator core 1, is open, and the first transition wire 211a may be placed in the wire passing groove 331a from the open side of the wire passing groove 331 a. In the arrangement of the first transition line 211a, the first transition line 211a may pass through one of the two passing grooves 331a of the passing groove group 331 from inside to outside, then pass through the other of the two passing grooves 331a of the passing groove group 331 from outside to inside to connect with the coil 211, wherein when a wall surface of the two passing grooves 331a adjacent to the center of the stator core 1 is located at one side of the limiting protrusion 332 adjacent to the center of the stator core 1, the first transition line 211a may achieve limitation by only the two passing grooves 331a, and when a wall surface of the two passing grooves 331a adjacent to the center of the stator core 1 is located at one side of the limiting protrusion 332 away from the center of the stator core 1, a portion of the first transition line 211a located at the outer peripheral wall of the third passing groove 30c may be caught on the limiting protrusion 332 between the two passing grooves 331a, and at this time, the first transition line 211a may achieve limitation by the two passing grooves 331a and the limiting protrusion 332 at the same time.
Specifically, each group of windings has a plurality of winding joints 20, and the winding joints 20 and the first transition lines 211a are located on the same side or different sides of the stator core 1, so that the arrangement of the winding joints 20 and the first transition lines 211a has good flexibility, and the stator winding 2 can be wound quickly. For example, as shown in fig. 5 and 6, the winding joint 20 of the coil group 21 may be located on the same side in the axial direction of the stator core 1 as the first transition line 211a of the coil group 21, that is, the winding joint 20 may pass out through one of the two insulating end plates, and the first transition line 211a may pass through the above one of the two insulating end plates; the winding connection 20 of the coil group 21 may also be located on the axially opposite side of the stator core 1 from the first transition line 211a of the coil group 21, that is, the winding connection 20 may be penetrated out through one of the two insulating end plates, and the first transition line 211a may be transited through the other of the two insulating end plates. For example, in the example of fig. 5, the winding joints 20 of the coil group 21 may be located on the upper side of the stator core 1 with the first transition lines 211a of the coil group 21; for another example, in the example of fig. 6, the winding joint 20 of the coil group 21 may be located at the upper side of the stator core 1, and the first transition line 211a of the coil group 21 may be located at the lower side of the stator core 1.
It will be appreciated that each set of windings comprises at least one coil set 21, each coil set 21 may have two winding connections 20, which two winding connections 20 may be located on the same side of the stator core 1 or on different sides of the stator core 1; each coil group 21 may have one or more first transition lines 211a, when the coil group 21 has one first transition line 211a, the first transition line 211a may be located on the same side or different sides of the stator core 1 from the two winding joints 20, when the coil group 21 has the plurality of first transition lines 211a, the plurality of first transition lines 211a may be located on the same side of the stator core 1 or different sides of the stator core 1, and the plurality of first transition lines 211a may be located on the same side or different sides of the stator core 1 from the two winding joints 20.
Specifically, in the example of fig. 2, each phase winding includes one coil group 21, the coil group 21 includes two coils 211, the two coils 211 are correspondingly provided on the two stator teeth 11 and the two coils 211 are adjacently provided; in the example of fig. 3, each phase winding includes one coil group 21, the coil group 21 includes three coils 211, the three coils 211 are correspondingly provided on the three stator teeth 11, and the three coils 211 are adjacently provided. In the example of fig. 1, each phase winding includes two coil groups 21, the two coil groups 21 are disposed opposite to each other in the radial direction of the stator core 1, each coil group 21 includes two coils 211, and of course, each coil group 21 may include three coils 211.
Further, as shown in fig. 1, the two coil groups 21 are connected through a second transition line 211b, one end of the second transition line 211b is connected with one of the two coil groups 21, and the other end of the second transition line 211b is transited from the insulating end plate to be connected with the other of the two coil groups 21, so that the second transition line 211b can be arranged on any one of the two insulating end plates in a penetrating manner, the second transition line 211b is prevented from obliquely crossing in the stator slot 10 between the two coil groups 21, the second transition line 211b is prevented from occupying the stator slot 10, the slot filling rate of the stator assembly 100 is further improved, and meanwhile, the second transition line 211b is effectively protected, and the second transition line 211b is prevented from being scratched or broken by a winding nozzle.
Of course, when each winding group includes two winding groups 21, the two winding groups 21 may also be wound separately from each other, that is, each winding group 21 has two winding joints 20, instead of being connected by the second transition line 211b, so that the winding has four winding joints 20.
It can be appreciated that the second transition line 211b may be limited by the limiting portion 33 on the insulating end plate, where the limiting portion 33 includes at least one of the wire passing groove group 331 and the limiting protrusion 332, so as to ensure the position stability of the second transition line 211b on the insulating end plate, avoid the second transition line 211b from separating from the insulating end plate to affect the winding or use of the stator assembly 100, and further ensure the use reliability of the stator assembly 100.
As shown in fig. 9, the stator slot 10 is provided with an insulating member 4 to separate the stator winding 2 from the stator teeth 11, so as to realize electrical insulation, the insulating member 4 may be made of thinner insulating paper, so that the effective sectional area in the stator slot 10 is larger, and more stator windings 2 may be arranged in the stator slot 10 to improve the slot filling rate, thereby improving the power density and efficiency of the permanent magnet motor 200; the insulating member 4 and the insulating end plate may be manufactured by integrally injection molding, so as to be separately and separately disposed, and the insulating member 4 and the insulating end plate may completely separate the stator winding 2 from the stator core 1. A plurality of mounting posts 34 are arranged on each insulating end plate at intervals along the circumferential direction of the stator core 1, each mounting post 34 can extend towards the stator core 1 along the axial direction of the stator core 1, a plurality of mounting holes are formed in the end faces of the two axial ends of the stator core 1 respectively, each mounting hole can be formed by recessing part of the end faces of the stator core 1, and the mounting posts 34 are matched in the mounting holes in a one-to-one correspondence manner, so that the insulating end plates are rapidly mounted on the stator core 1.
Wherein, each mounting post 34 can be formed into a cylindrical structure, the free end of each mounting post 34 can be equipped with guide portion 341, the periphery wall of guide portion 341 forms the guide surface, guide portion 341 can be formed into round platform structure for the cross-sectional area of guide portion 341 reduces gradually along stator core 1's axial, by the one end that keeps away from stator core 1 center of guide portion 341 towards the one end that the stator core 1 center was close to guide portion 341, makes in the installation of insulating end plate, the guide surface can play good guide effect, has further promoted insulating end plate's installation effectiveness.
The permanent magnet motor 200 according to the embodiment of the second aspect of the present invention includes the stator assembly 100 according to the embodiment of the first aspect of the present invention described above.
For example, as shown in fig. 10, the permanent magnet motor 200 may further include a rotor assembly 101, the rotor assembly 101 may be located inside the stator assembly 100 and a central axis of the rotor assembly 101 may be disposed coincident with a central axis of the stator assembly 100; the rotor assembly 101 includes a rotor core 101a and permanent magnets 101b embedded on the rotor core 101a, a plurality of permanent magnet slots may be formed on the rotor core 101a, the permanent magnet slots may be disposed at intervals along a circumferential direction of the rotor core 101a, each permanent magnet slot may penetrate through end surfaces of two ends of the rotor core 101a along an axial direction of the rotor core 101a, and the plurality of permanent magnets 101b may be embedded in the plurality of permanent magnet slots correspondingly, so that each permanent magnet slot is embedded with at least one permanent magnet 101b to form a magnetic pole.
According to the permanent magnet motor 200 of the embodiment of the invention, by adopting the stator assembly 100, the power density and efficiency of the permanent magnet motor 200 can be effectively improved, and the miniaturization of the permanent magnet motor 200 can be realized.
Alternatively, as shown in fig. 10, the number of stages Q of the rotor assembly 101, Q satisfies: q is 8-14, for example, the stator slot 10 is 12, Q can be 10, compared with a rotor assembly with 4 or 6 magnetic poles in the prior art, the power density of the permanent magnet motor 200 is further effectively improved due to the increased number of the magnetic poles, copper loss of the permanent magnet motor 200 is reduced, the efficiency of the permanent magnet motor 200 is further improved, the structural size of the rotor assembly 101 can be reduced, and the miniaturization of the permanent magnet motor 200 is further realized.
The compressor 300 according to the embodiment of the third aspect of the present invention includes the permanent magnet motor 200 according to the embodiment of the above second aspect of the present invention. Wherein the compressor 300 may be a vertical compressor; the compressor 300 may be a single cylinder compressor or a multi-cylinder compressor. But is not limited thereto.
For example, as shown in fig. 11, the compressor 300 may be a single cylinder compressor and the compressor 300 may be a rotary compressor, the compressor 300 may further include a casing 201, a crankshaft 202, and a compression mechanism 203, the crankshaft 202, the compression mechanism 203, and the permanent magnet motor 200 are all disposed in the casing 201, a top of the casing 201 may be formed with an air outlet 201b, an air inlet 201a may be formed on a peripheral wall of the casing 201, and the crankshaft 202 is disposed through the permanent magnet motor 200 and the compression mechanism 203, so that when the permanent magnet motor 200 is operated, the rotor assembly 101 rotates to drive the compression mechanism 203 to operate through the crankshaft 202 to achieve suction, compression, and discharge of a refrigerant; the compression mechanism 203 includes a cylinder 203a, and a main bearing 203b and a sub bearing 203c respectively disposed at both ends of the cylinder 203a, a compression chamber is defined in the compression mechanism 203, and an inlet and an outlet communicating with the compression chamber respectively may be formed in the compression mechanism, a piston 203d is disposed in the compression chamber, an eccentric portion of the crankshaft 202 is inserted into the piston 203d to drive the piston 203d to eccentrically operate, and the inlet communicates with the intake port 201a to allow a refrigerant to flow into the compression chamber through the intake port 201a and the inlet to be compressed. Wherein, the end of the rotor assembly 101 of the permanent magnet motor 200 may be provided with a balancing weight to realize dynamic balance of the crankshaft 102.
According to the compressor 300 of the embodiment of the present invention, by adopting the permanent magnet motor 200 described above, the compressor 300 can be made efficient and compact.
A fan according to an embodiment of the fourth aspect of the present invention includes a permanent magnet motor 200 according to an embodiment of the above-described second aspect of the present invention.
According to the fan provided by the embodiment of the invention, the permanent magnet motor 200 can be used for achieving high efficiency and miniaturization of the fan.
An air conditioner according to a fifth aspect of the present invention includes at least one of the compressor according to the above-described third aspect of the present invention and the blower according to the above-described fourth aspect of the present invention, that is, the air conditioner includes the compressor 300 according to the above-described third aspect of the present invention and the blower is not the blower according to the above-described fourth aspect of the present invention, or the compressor is not the compressor 300 according to the above-described third aspect of the present invention and the blower is not the blower according to the above-described fourth aspect of the present invention, or the compressor 300 according to the above-described third aspect of the present invention and the blower is the blower according to the above-described fourth aspect of the present invention. The air conditioner can realize refrigeration and/or heating, and can be a cabinet air conditioner, a wall-mounted air conditioner, an embedded air conditioner, a window air conditioner or the like.
According to the air conditioner of the embodiment of the invention, the compressor 300 and at least one of the fans are adopted, so that the air conditioner can be efficient and energy-saving.
Other constructions and operations of the air conditioner according to the embodiment of the present invention are known to those skilled in the art, and will not be described in detail herein.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A stator assembly, comprising:
The stator core comprises a plurality of stator teeth, the plurality of stator teeth are arranged along the circumferential direction of the stator core, and stator slots are defined between two adjacent stator teeth;
The stator winding comprises a multi-phase winding, each phase of winding comprises at least one coil group, each coil group comprises a plurality of coils, the coils are adjacently arranged along the circumferential direction of the stator core, each coil is correspondingly wound on the stator teeth, two adjacent coils in the coil groups are connected through a first transition line, the current directions of the two adjacent coils in the common stator slot are the same, and the winding directions of the two adjacent coils in the coil groups are opposite;
The two insulating end plates are respectively arranged at two axial ends of the stator core, one end of the first transition line is connected with one of the two adjacent coils, and the other end of the first transition line is transited from the insulating end plates to be connected with the other of the two adjacent coils;
At least one of the two insulating end plates is provided with a limiting part, and the limiting part comprises at least one of a wire passing groove group and a limiting protrusion so as to limit the displacement of the first transition wire;
the insulating end plate includes:
The first wire passing portion, spacing portion includes a plurality of wire passing groove group, a plurality of wire passing groove group is followed stator core's circumference interval sets up, every wire passing groove group includes two wire passing grooves, two wire passing grooves all form on the first wire passing portion and along stator core's circumference interval sets up, every wire passing groove is followed stator core's radial run through first wire passing portion, wire passing groove keep away from stator core's one side is opened, the both ends of first wire passing groove pass respectively two wire passing groove group pass the wire passing groove with the coil links to each other.
2. The stator assembly of claim 1, wherein the insulating end plate comprises:
The second wire passing part, the spacing portion includes a plurality of spacing arch, spacing arch is established on the periphery wall of second wire passing part, first transition ply-yarn drill is established on the spacing arch.
3. The stator assembly of claim 1, wherein the insulating end plate comprises:
The annular third wire passing part comprises a plurality of wire passing groove groups and a plurality of limiting protrusions, the wire passing groove groups comprise at least one wire passing groove,
When the wire passing groove group comprises one wire passing groove, one end of the first transition wire passes through the wire passing groove to be connected with one of the two adjacent coils, and the other end of the first transition wire is clamped on the limiting protrusion to be connected with the other of the two adjacent coils;
when the wire passing groove group comprises two wire passing grooves, the limiting protrusion is positioned between the two wire passing grooves of the wire passing groove group in the circumferential direction of the stator core.
4. The stator assembly of claim 1, wherein each set of windings has a plurality of winding joints on the same side or different sides of the stator core than the first transition line.
5. The stator assembly according to any one of claims 1-4, wherein each phase of the winding comprises one of the coil sets comprising two or three of the coils.
6. The stator assembly according to any one of claims 1-4, wherein each phase of the winding comprises two of the coil sets, the two coil sets being disposed opposite each other in a radial direction of the stator core.
7. The stator assembly of claim 6 wherein two of the coil sets are connected by a second crossover line, one end of the second crossover line being connected to one of the two coil sets and the other end of the second crossover line transitioning from the insulating end plate to being connected to the other of the two coil sets.
8. A permanent magnet machine comprising a stator assembly according to any one of claims 1-7.
9. A compressor comprising a permanent magnet motor according to claim 8.
10. A wind turbine comprising the permanent magnet motor of claim 8.
11. An air conditioner comprising a compressor and a blower, at least one of the compressor and the blower comprising the permanent magnet motor of claim 8.
Priority Applications (1)
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| CN201810845370.3A CN110768403B (en) | 2018-07-27 | 2018-07-27 | Stator assembly, permanent magnet motor, compressor, fan and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810845370.3A CN110768403B (en) | 2018-07-27 | 2018-07-27 | Stator assembly, permanent magnet motor, compressor, fan and air conditioner |
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| CN110768403A CN110768403A (en) | 2020-02-07 |
| CN110768403B true CN110768403B (en) | 2024-07-12 |
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| CN208423956U (en) * | 2018-07-27 | 2019-01-22 | 广东美芝制冷设备有限公司 | Stator module, magneto, compressor, blower and air conditioner |
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| JP2015091146A (en) * | 2013-11-05 | 2015-05-11 | 日立オートモティブシステムズ株式会社 | Concentrated winding stator of rotary electric machine and rotary electric machine including the same |
| CN104578474A (en) * | 2015-01-30 | 2015-04-29 | 安徽美芝制冷设备有限公司 | Stator component and compressor with same |
| CN107204669B (en) * | 2017-06-30 | 2021-06-22 | 安徽美芝制冷设备有限公司 | Stator assembly, motor and compressor |
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| CN208423956U (en) * | 2018-07-27 | 2019-01-22 | 广东美芝制冷设备有限公司 | Stator module, magneto, compressor, blower and air conditioner |
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