CN110875647B - Stator, synchronous motor and compressor - Google Patents
Stator, synchronous motor and compressor Download PDFInfo
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- CN110875647B CN110875647B CN201811006250.0A CN201811006250A CN110875647B CN 110875647 B CN110875647 B CN 110875647B CN 201811006250 A CN201811006250 A CN 201811006250A CN 110875647 B CN110875647 B CN 110875647B
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- 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
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention provides a stator, a synchronous motor and a compressor, wherein the number of convex teeth is 9, the 9 convex teeth are arranged at intervals on the inner side of a yoke part along the circumferential direction of the yoke part, and tooth shoes are arranged at the inner ends of the convex teeth; the winding is wound on the convex teeth, coils of three adjacent convex teeth in the winding form one phase of the winding, the convex teeth are divided into 3 phases, each coil only spans one convex tooth, the three convex teeth forming one phase comprise a middle convex tooth positioned in the middle, a first convex tooth and a second convex tooth respectively positioned on two sides of the middle convex tooth, and the second convex tooth, the middle convex tooth and the first convex tooth are sequentially arranged according to the rotation direction of the rotor; the maximum radial thickness of the tooth shoe of the middle convex tooth is W1, the maximum radial thickness of the tooth shoe of the first convex tooth is W2, the maximum radial thickness of the tooth shoe of the second convex tooth is W3, the width of the convex tooth is Wt, W1/W2 is more than or equal to 0.50 and less than or equal to 1.85, W1/W2 is more than or equal to 0.5 and less than or equal to 1.7, and W1/Wt is more than or equal to 0.20 and less than or equal to 0.75. The stator provided by the invention can effectively reduce the unbalanced electromagnetic tension of the synchronous motor and reduce the vibration noise of the motor.
Description
Technical Field
The present invention relates to the field of compressors, and more particularly, to a stator, a synchronous motor including the stator, and a compressor including the synchronous motor.
Background
In the existing rotary direct-current variable-frequency compressor adopting a permanent magnet motor, a three-phase motor generally adopts a built-in permanent magnet motor, and a stator winding is usually wound on convex teeth of the motor. The number of poles of the magnets and the number of stator slots used in the rotor core are typically 2: 3, stator teeth (convex teeth) and rotor magnetic poles are distributed on the circumference at equal intervals, but the energy efficiency of the motor is improved due to low winding coefficient of the stator teeth and the rotor magnetic poles, so that a bottleneck exists. If the motor adopts the near-pole slot with the structural unit of 1 for matching, the motor can have higher winding coefficient, reduce the copper consumption of the motor and effectively improve the efficiency of the motor. However, this type of motor has vibration noise generated by unbalanced electromagnetic force, so that the quality of the motor is degraded.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
To this end, a first aspect of the invention aims to provide a stator.
A second aspect of the invention aims to provide a synchronous machine comprising a stator as described above.
A third aspect of the present invention is directed to a compressor including the synchronous motor described above.
To achieve the above object, a first aspect of the present invention provides a stator including: a yoke portion having a ring shape; the number of the convex teeth is 9, the 9 convex teeth are arranged on the inner side of the yoke part at intervals along the circumferential direction of the yoke part, and tooth shoes are arranged at the inner ends of the convex teeth; the windings are wound on the convex teeth, coils of three adjacent convex teeth in the windings form one phase of the windings, the convex teeth are divided into 3 phases, each coil only spans one convex tooth, the three convex teeth forming one phase comprise a middle convex tooth positioned in the middle, a first convex tooth and a second convex tooth respectively positioned on two sides of the middle convex tooth, and the second convex tooth, the middle convex tooth and the first convex tooth are sequentially arranged according to the rotation direction of the rotor; wherein the maximum radial thickness dimension of the tooth shoe of the intermediate tooth is W1, the maximum radial thickness dimension of the tooth shoe of the first tooth is W2, the maximum radial thickness dimension of the tooth shoe of the second tooth is W3, and the width of the tooth is Wt, then: W1/W2 is more than or equal to 0.50 and less than or equal to 1.85, W1/W3 is more than or equal to 0.5 and less than or equal to 1.7, and W1/Wt is more than or equal to 0.20 and less than or equal to 0.75.
According to the stator provided by the technical scheme of the invention, the limit on W1, W2, W3 and Wt is adopted, on the premise that the manufacturability is not changed, the unbalanced electromagnetic tension of the synchronous motor can be effectively reduced, the vibration noise of the motor is further reduced, the hearing is improved, and the synchronous motor with better quality is provided.
W1/W2 may be, but is not limited to, 0.50, 0.75, 1.00, 1.25, 1.50, or 1.85; W1/W3 may be, but is not limited to, 0.5, 0.7, 1.0, 1.3, 1.6, or 1.7; W1/Wt may be, but is not limited to, 0.20, 0.40, 0.60, or 0.75.
In addition, the stator provided by the technical scheme of the invention also has the following additional technical characteristics:
in the above technical solution, preferably, the minimum radial thickness of the tooth shoe of the middle convex tooth is W1min, and W1/W1min is more than or equal to 1.4 and less than or equal to 3.2.
Along with the change of the maximum radial thickness dimension of the tooth shoe of the middle convex tooth, the minimum radial thickness dimension of the tooth shoe of the middle convex tooth also has to be changed in the same trend to ensure that the magnetic flux can smoothly pass through, so that the distortion rate of the back electromotive force and the air gap flux density waveform can be in a better range.
In the technical scheme, W1 preferably satisfies 1.5mm W1 mm 5.5 mm.
W1 may be, but is not limited to, 1.5mm, 3.0mm, 4.0mm, 5.0mm, or 5.5 mm.
In the above technical solution, preferably, the tooth shoe of the middle convex tooth is asymmetric along the axis of the middle convex tooth, and the tooth shoe of an asymmetric shape can achieve a better back electromotive force lifting effect as well, thereby reducing copper consumption and improving efficiency, and the specific asymmetry can be that the tooth shoe of the middle convex tooth is divided into two parts by the axis of the middle convex tooth, which have different lengths (central angles corresponding to the two parts) and/or different thicknesses; and/or the tooth shoe of the first convex tooth is asymmetric along the axis of the first convex tooth, the tooth shoe in an asymmetric shape can achieve a better back electromotive force lifting effect, so that copper consumption is reduced, and efficiency is improved, and the specific asymmetry can be that the tooth shoe of the middle convex tooth is divided into two parts by the axis of the middle convex tooth, wherein the two parts have different lengths (central angles corresponding to the two parts) and/or different thicknesses; and/or the tooth shoe of the second convex tooth is asymmetric along the axis of the second convex tooth, the tooth shoe in an asymmetric shape can achieve a better back electromotive force lifting effect, so that copper consumption is reduced, and the efficiency is improved.
In the above technical solution, preferably, winding directions of the coils on adjacent teeth in one phase are opposite.
A synchronous motor having 9 teeth, wherein the 9 teeth are divided into 3 phases with every 3 adjacent teeth being 1 phase, that is, 3 teeth constituting each of U, V, and W phases, each of the 9 teeth includes a middle tooth positioned in the middle, and first and second teeth positioned on both sides of the middle tooth, and the direction of winding a coil provided on the middle tooth is opposite to the direction of winding a coil provided on the first and second teeth. The windings constituting the U-phase are arranged in a concentrated manner in the 3 teeth constituting the U-phase. Similarly, the windings constituting the V-phase are arranged in a concentrated manner on the 3 teeth constituting the V-phase, and the windings constituting the W-phase are arranged in a concentrated manner on the 3 teeth constituting the W-phase.
In the above technical solution, preferably, the inner diameter and the outer diameter of the stator are Di and Do, respectively, wherein Di/Do is not less than 0.52 and not more than 0.57.
The ratio of Di/Do is limited in the range, so that the optimal cost performance can be obtained while the rotational inertia is met. Di/Do can be, but is not limited to, 0.52, 0.53, 0.54, 0.55, 0.56, or 0.57.
A technical solution of a second aspect of the present invention provides a synchronous motor, including: the stator according to any one of the above aspects; and the rotor comprises a rotor core and a permanent magnet arranged on the rotor core, and the rotor is rotatably arranged in the stator.
The synchronous motor according to the second aspect of the present invention includes the stator according to any one of the first aspect of the present invention, so that all the beneficial effects of the stator according to any one of the first aspect of the present invention are achieved, and details are not repeated herein.
The rotor comprises a rotor core, the rotor core comprises rotor punching sheets and magnet slots, the number of the slots is at least one, the slots correspond to the permanent magnets one by one, the permanent magnets are located in the magnet slots, and all the magnet slots are distributed at intervals along the circumferential direction of the rotor core.
In the above technical solution, preferably, the number of poles of the rotor is 8, and an 8-pole 9-slot synchronous motor having 9 convex teeth is formed. The method can obtain the synchronous motor with the 8-pole rotor through finite element numerical calculation, and the synchronous motor with the 8-pole rotor has smaller unbalanced magnetic tension and can obviously reduce low-frequency noise.
In the above technical solution, preferably, the sum of the widths of the permanent magnets under each magnetic pole is bm, the inner diameter of the stator is Di, and the number of pole pairs of the rotor is P, then bm × 2P/(pi × Di) is 0.75 or more and 0.9 or less.
The width and the pole pair number of the permanent magnet satisfy that bm multiplied by 2P/(pi multiplied by Di) is more than or equal to 0.75 and less than or equal to 0.9, so that the highest utilization rate and the optimal cost performance of the permanent magnet can be realized.
In the above technical solution, preferably, the permanent magnet is in the shape of a sheet or an arc.
In the above technical solution, preferably, each magnetic pole includes two permanent magnets, each magnetic pole is V-shaped, and an opening angle of the V-shape ranges from 90 ° to 130 °.
The permanent magnets are arranged in the magnet slots and form N/S alternating magnetic poles, the two permanent magnets form V-shaped magnetic poles, and when the opening angle of the V shape ranges from 90 degrees to 130 degrees, the maximum counter potential fundamental wave can be realized, the copper consumption of the winding is low, and the efficiency is high. The opening angle of the V-shape may be, but is not limited to, 90 °, 110 °, or 130 °.
In the above-described aspect, it is preferable that the rated torque T of the synchronous machine, the inner diameter Di of the stator, and the torque per unit volume TPV of the rotor satisfy 5.18 × 10-7≤T×Di-3×TPV-1≤1.17×10-6Wherein the rated torque T is expressed in the unit of N.m, the inner diameter Di of the stator is expressed in the unit of mm, and the unit volume torque TPV is expressed in the unit of kN.m.m-3The value range of the unit volume torque TPV is 5 kN.m.m-3≤TPV≤45kN·m·m-3。
The numerical range of the combined variables of the rated torque T of the permanent magnet motor, the inner diameter Di of the stator and the unit volume torque TPV of the rotor is limited, and the numerical range of the unit volume torque TPV is also limited, so that the permanent magnet motor can meet the power requirement in the field of compressors, correspondingly, the magnetic leakage of the rotor can be effectively reduced, the utilization rate of the permanent magnet is increased, and the motor efficiency is improved.
In the above technical solution, preferably, the arcs on both sides of the d axis of the magnetic pole form a whole segment of arc with the rotation center as the center of circle, the corresponding central angle of the arc is α 1, the polar distance angle is α 2, wherein α 1/α 2 is greater than or equal to 0.5, and the straight line passing through the symmetric center line of the magnet slot and the center of the rotor is set as the d axis.
An aspect of the third aspect of the present invention provides a compressor including the synchronous motor according to any one of the aspects of the second aspect.
The compressor provided by the third aspect of the present invention includes the synchronous motor according to any one of the second aspect of the present invention, so that all the beneficial effects of the synchronous motor according to any one of the second aspect of the present invention are achieved, and details are not repeated herein.
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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a stator according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a 10-pole rotor according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a rotor according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a rotor according to another embodiment of the present invention;
FIG. 5 is a schematic view of a stator segment according to an embodiment of the present invention, wherein the teeth shoes of the intermediate lobes are asymmetrical;
FIG. 6 is a partial structural view of a stator according to an embodiment of the present invention, wherein the tooth shoes of the first lobe and the tooth shoes of the second lobe are asymmetrical;
FIG. 7 is a table of the optimization results of numerical calculations in the present invention;
FIG. 8 is a table of the optimization results of numerical calculations in the present invention;
fig. 9 is a schematic sectional view of a compressor according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 9 is:
1 stator, 11 yoke part, 12 convex teeth, 13 middle convex teeth, 14 first convex teeth, 15 second convex teeth, 16 coils, 17 tooth boots, 2 rotor, 3 permanent magnets, 100 compressor and 10 synchronous motor.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
A stator, a synchronous motor, and a compressor according to some embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1, according to a stator 1 provided in some embodiments of the present invention, the stator 1 includes an annular yoke 11, and teeth 12 distributed in a circumferential direction of the yoke 11 with a rotation center as a center, and the teeth 12 are located inside the yoke 11, and the number of the teeth 12 is 9. The stator 1 also comprises a winding in which the coils 16 of three adjacent teeth 12 constitute one phase of the winding, and each coil 16 spans only one tooth 12. Of the three teeth 12 constituting one phase, the maximum radial thickness of the tooth shoes 17 on the middle tooth 13, the first teeth 14 on both sides, and the second teeth 15 satisfies the relationship: maximum radial thickness dimension W1 of tooth shoe 17 of intermediate tooth 13, maximum radial thickness dimension W2 of tooth shoe 17 of first tooth 14, maximum radial thickness dimension W3 of tooth shoe 17 of second tooth 15, and stator 1 tooth width Wt, which satisfy: W1/W2 is more than or equal to 0.5 and less than or equal to 1.85, W1/W3 is more than or equal to 0.5 and less than or equal to 1.7, and W1/Wt is more than or equal to 0.2 and less than or equal to 0.75, and as shown in the figure 7 and the figure 8, optimization is carried out according to finite element numerical calculation, and an optimal design size range is found from a plurality of optimization schemes. Wherein the second lobe 15, the intermediate lobe 13 and the first lobe 14 are arranged in sequence in the direction of rotation of the rotor. The direction of rotation of the rotor is counterclockwise as viewed in fig. 1.
The rotor structure provided by the invention can effectively reduce the unbalanced electromagnetic tension of the motor, thereby reducing the vibration noise of the motor and improving the hearing.
A synchronous machine 10 comprising a stator 1 according to any of the above embodiments, the synchronous machine 10 further comprising a rotor rotatably arranged inside the teeth 12. The rotor includes rotor core, and rotor core includes rotor punching, magnet slot, and the quantity of magnet slot is at least one, and the circumference interval distribution of rotor core is followed to whole magnet slot, and the permanent magnet setting is in the magnet slot. The permanent magnets are in a sheet shape or an arc shape, and the permanent magnets are arranged in the magnet slots in a one-to-one correspondence mode.
The number of poles of the motor rotor is 8.
The invention has obvious effect on improving the unbalanced magnetic pull force of the 8-pole motor.
In a synchronous motor in which the number of poles and the number of slots are combined into 8-pole 9-slot windings constituting one phase are collectively provided. Therefore, when a current flows to the stator winding, a rotating magnetic field is generated to generate an uneven electromagnetic force with respect to the rotation shaft of the rotor. A large radial exciting force is generated in the radial direction with respect to the rotating shaft. In an 8-pole, 9-slot synchronous motor, the excitation force varies in a sine wave for 8 total cycles as the rotor rotates one revolution. The magnitude of the radial exciting force shows a tendency to increase as the load torque of the synchronous motor increases.
The minimum radial thickness dimension of the tooth shoe 17 of the middle convex tooth 13 is W1min, and W1/W1min is more than or equal to 1.4 and less than or equal to 3.2.
With the change of the maximum radial thickness dimension of the tooth shoe 17 of the middle convex tooth 13, the minimum radial thickness dimension of the tooth shoe 17 of the middle convex tooth 13 also has to be changed in the same trend to ensure that the magnetic flux can pass smoothly, so that the distortion rate of the counter potential and the air gap flux density waveform can be in a better range.
The size range of W1 is 1.5mm to 5.5mm, which defines the maximum thickness range of the stator teeth (teeth 12) and the tooth shoes 17 of the motor of the compressor 100.
As shown in fig. 5, the left and right portions of the tooth shoe 17 of the intermediate tooth 13 in one phase are asymmetric.
The tooth shoes 17 with the asymmetrical shapes can achieve a good back electromotive force lifting effect, copper consumption is reduced, and efficiency is improved, wherein the left part and the right part refer to two parts of the tooth shoes 17 of the middle convex teeth 13 divided by the axis of the middle convex teeth 13.
As shown in fig. 6, the left and right portions of the tooth shoe 17 of the two teeth 12 (first tooth 14 and second tooth 15) located on both sides in one phase are asymmetric, the left and right portions of the tooth shoe 17 of the first tooth 14 refer to two portions into which the tooth shoe 17 of the first tooth 14 is divided by the axis of the first tooth 14, and the left and right portions of the tooth shoe 17 of the second tooth 15 refer to two portions into which the tooth shoe 17 of the second tooth 15 is divided by the axis of the second tooth 15.
The tooth boots 17 with asymmetric shapes can achieve a good back electromotive force lifting effect, so that copper consumption is reduced, and efficiency is improved.
The winding directions of the adjacent coils 16 in one phase are opposite, which is a unique winding method of such a 9-slot motor structure.
The number of rotor poles of the motor is 8. The method can obtain the result through finite element numerical calculation, and for the motor with the 8-pole rotor, the method can have smaller unbalanced magnetic pull force and can obviously reduce low-frequency noise.
The ratio of the inner diameter Di to the outer diameter Do of the iron core of the stator 1 meets the condition that Di/Do is more than or equal to 0.52 and less than or equal to 0.57.
The ratio of Di/Do is limited in the range, so that the optimal cost performance can be obtained while the rotational inertia is met.
As shown in figures 3 and 4, the sum of the widths of the permanent magnets under each magnetic pole is bm, the inner diameter of the stator 1 is Di, the pole pair number of the rotor is P, and the sum of the widths of the permanent magnets under each magnetic pole is bm multiplied by 2P/(pi multiplied by Di) is more than or equal to 0.75 and less than or equal to 0.9.
When a plurality of permanent magnets are included in one magnetic pole, bm is the sum of the widths of the plurality of permanent magnets. Taking an example that one magnetic pole comprises two permanent magnets, the widths of the two permanent magnets are bm1 and bm2 respectively, bm is the sum of the widths of the two permanent magnets, namely bm1+ bm2, and the sum of the widths of the permanent magnets and the pole pair number meet the range, the highest utilization rate of the permanent magnets can be realized, and the cost performance is optimal.
As shown in fig. 3, each magnetic pole includes two permanent magnets, and each magnetic pole is V-shaped, and the opening angle of the V-shape ranges from 90 ° to 130 °. The angle of the V-shaped permanent magnet meets the range, the maximum back electromotive force fundamental wave can be realized, the copper consumption of the winding is low, and the efficiency is high.
As shown in FIG. 2, the arcs on both sides of the d axis of the magnetic pole form a whole segment of arc with the center of rotation as the center of circle, the corresponding central angle of the arc is α 1, the polar distance angle is α 2, wherein α 1/α 2 is not less than 0.5.
The rated torque T of the synchronous motor 10, the inner diameter Di of the stator 1 and the unit volume torque TPV of the rotor satisfy 5.18 x 10-7≤T×Di-3×TPV-1≤1.17×10-6Wherein the rated torque T is expressed in the unit of N.m, the inner diameter Di is expressed in the unit of mm, and the unit volume torque TPV is expressed in the unit of kN.m.m-3The value range of the unit volume torque TPV is 5 kN.m.m-3≤TPV≤45kN·m·m-3。
In the technical scheme, the value range of the combined variable of the rated torque T of the permanent magnet motor, the inner diameter Di of the stator 1 and the unit volume torque TPV of the rotor is limited, and the value range of the unit volume torque TPV is also limited, so that the permanent magnet motor can meet the power requirement in the field of the compressor 100, and correspondingly, the permanent magnet motor adopting the rotor and the compressor 100 can effectively reduce the magnetic leakage of the rotor, increase the utilization rate of the permanent magnet and improve the motor efficiency.
As shown in fig. 9, an embodiment of a third aspect of the present invention provides a compressor 100 including the synchronous motor 10 according to any one of the above embodiments. Thus having all the advantages of the synchronous machine 10 and not being described in detail herein.
In summary, the stator 1 provided in the embodiments of the present invention has high back electromotive force and low winding loss, can improve motor efficiency when mounted on a synchronous motor, and is suitable for the permanent magnet synchronous motor 10, and by optimizing the structure of the stator 1 of the motor, the unbalanced electromagnetic force of the motor is effectively reduced on the premise of ensuring the manufacturability without changing, and further, the vibration noise of the motor is suppressed, thereby providing a permanent magnet motor with good quality.
In the description of the present invention, the term "plurality" means two or more unless explicitly specified or limited otherwise; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present specification, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A stator, comprising:
a yoke portion having a ring shape;
the number of the convex teeth is 9, the 9 convex teeth are arranged on the inner side of the yoke part at intervals along the circumferential direction of the yoke part, and tooth shoes are arranged at the inner ends of the convex teeth; and
the winding is wound on the convex teeth, coils of three adjacent convex teeth in the winding form one phase of the winding, the convex teeth are divided into 3 phases, each coil only spans one convex tooth, the three convex teeth forming one phase comprise a middle convex tooth positioned in the middle, a first convex tooth and a second convex tooth respectively positioned on two sides of the middle convex tooth, and the second convex tooth, the middle convex tooth and the first convex tooth are sequentially arranged according to the rotation direction of the rotor;
wherein the maximum radial thickness dimension of the tooth shoe of the intermediate tooth is W1, the maximum radial thickness dimension of the tooth shoe of the first tooth is W2, the maximum radial thickness dimension of the tooth shoe of the second tooth is W3, and the width of the tooth is Wt, then:
0.50≤W1/W2≤1.85，0.5≤W1/W3≤1.7，0.20≤W1/Wt≤0.75；
the minimum radial thickness of the tooth shoe of the middle convex tooth is W1min, and W1/W1min is more than or equal to 1.4 and less than or equal to 3.2.
2. The stator according to claim 1,
w1 satisfies 1.5mm W1 mm 5.5 mm.
3. The stator according to claim 1 or 2,
the tooth shoes of the intermediate lobes are asymmetrical along the axis of the intermediate lobes; and/or the presence of a gas in the gas,
the tooth shoe of the first tooth is asymmetric along an axis of the first tooth; and/or the presence of a gas in the gas,
the tooth shoe of the second tooth is asymmetric along an axis of the second tooth.
4. The stator according to claim 1 or 2,
the winding directions of the coils on the adjacent convex teeth in one phase are opposite.
5. The stator according to claim 1 or 2,
the inner diameter and the outer diameter of the stator are Di and Do respectively, wherein Di/Do is more than or equal to 0.52 and less than or equal to 0.57.
6. A synchronous machine, comprising:
the stator of any one of claims 1 to 5; and
the rotor comprises a rotor core and a permanent magnet arranged on the rotor core, and the rotor is rotatably arranged in the stator.
7. The synchronous machine of claim 6,
the number of poles of the rotor is 8.
8. Synchronous machine according to claim 6 or 7,
the sum of the widths of the permanent magnets under each magnetic pole is bm, the inner diameter of the stator is Di, the number of pole pairs of the rotor is P, and bm multiplied by 2P/(pi multiplied by Di) is more than or equal to 0.75 and less than or equal to 0.9.
9. Synchronous machine according to claim 6 or 7,
the permanent magnet is in a sheet shape or an arc shape.
10. The synchronous machine according to claim 9,
each magnetic pole comprises two permanent magnets, each magnetic pole is V-shaped, and the opening angle of the V-shaped is 90-130 degrees.
11. Synchronous machine according to claim 6 or 7,
the rated torque T of the synchronous motor, the inner diameter Di of the stator and the unit volume torque TPV of the rotor satisfy 5.18 multiplied by 10-7≤T×Di-3×TPV-1≤1.17×10-6Wherein the rated torque T is expressed in the unit of N.m, the inner diameter Di of the stator is expressed in the unit of mm, and the unit volume torque TPV is expressed in the unit of kN.m.m-3The value range of the unit volume torque TPV is 5 kN.m.m-3≤TPV≤45kN·m·m-3。
12. Synchronous machine according to claim 6 or 7,
the arcs on two sides of the d axis of the magnetic pole form a whole segment of arc with the rotation center as the center of circle, the corresponding central angle of the arc is alpha 1, the polar distance angle is alpha 2, wherein alpha 1/alpha 2 is more than or equal to 0.5.
13. A compressor, characterized by comprising a synchronous electric machine according to any one of claims 6 to 12.
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| CN201811006250.0A CN110875647B (en) | 2018-08-30 | 2018-08-30 | Stator, synchronous motor and compressor |
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| CN201811006250.0A CN110875647B (en) | 2018-08-30 | 2018-08-30 | Stator, synchronous motor and compressor |
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| CN110875647B true CN110875647B (en) | 2022-02-25 |
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| CN (1) | CN110875647B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105474512A (en) * | 2013-09-02 | 2016-04-06 | 三菱电机株式会社 | Synchronous electric motor |
| CN106059130A (en) * | 2016-06-30 | 2016-10-26 | 广东美芝制冷设备有限公司 | Motor stator for compressor, motor equipped with motor stator, and compressor equipped with motor |
| CN205901457U (en) * | 2016-07-25 | 2017-01-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator is towards piece and motor |
| CN206517175U (en) * | 2016-11-21 | 2017-09-22 | 北京京仪敬业电工科技有限公司 | A kind of motor stator punching |
-
2018
- 2018-08-30 CN CN201811006250.0A patent/CN110875647B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105474512A (en) * | 2013-09-02 | 2016-04-06 | 三菱电机株式会社 | Synchronous electric motor |
| CN106059130A (en) * | 2016-06-30 | 2016-10-26 | 广东美芝制冷设备有限公司 | Motor stator for compressor, motor equipped with motor stator, and compressor equipped with motor |
| CN205901457U (en) * | 2016-07-25 | 2017-01-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator is towards piece and motor |
| CN206517175U (en) * | 2016-11-21 | 2017-09-22 | 北京京仪敬业电工科技有限公司 | A kind of motor stator punching |
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| CN110875647A (en) | 2020-03-10 |
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