CN110875662B - Stator components, motors and compressors - Google Patents
Stator components, motors and compressors Download PDFInfo
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- CN110875662B CN110875662B CN201811015725.2A CN201811015725A CN110875662B CN 110875662 B CN110875662 B CN 110875662B CN 201811015725 A CN201811015725 A CN 201811015725A CN 110875662 B CN110875662 B CN 110875662B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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Abstract
本发明公开了一种定子部件、电机及压缩机，定子部件包括：定子铁芯和定子绕组，沿定子孔的周向方向间隔设有多个定子齿，任意相邻的两个定子齿之间限定出绕线槽。定子绕组包括主绕组和副绕组，主绕组和副绕组穿过绕线槽绕设于定子齿上。其中，跨距最小的副绕组与主绕组共同设于同一绕线槽内，在同一绕线槽内的主绕组的铜线的横截面积的总和为S1，副绕组的铜线的横截面积的总和为S2，满足：0.4≤S2/(S1+S2)≤0.8。根据本发明的定子部件，通过设置跨距最小的副绕组与主绕组位于同一绕线槽内，并使同一绕线槽内的副绕组和主绕组的占比满足0.4≤S2/(S1+S2)≤0.8，可以提高共槽内副绕组的占比，有利于降低副绕组的三次谐波含量，从而提高了电机效率。
The present invention discloses a stator component, a motor and a compressor. The stator component includes: a stator core and a stator winding. A plurality of stator teeth are arranged at intervals along the circumferential direction of the stator hole, and a winding slot is defined between any two adjacent stator teeth. The stator winding includes a main winding and a secondary winding, and the main winding and the secondary winding are wound on the stator teeth through the winding slot. Among them, the secondary winding with the smallest span is arranged in the same winding slot with the main winding, and the sum of the cross-sectional areas of the copper wires of the main winding in the same winding slot is S1, and the sum of the cross-sectional areas of the copper wires of the secondary winding is S2, which satisfies: 0.4≤S2/(S1+S2)≤0.8. According to the stator component of the present invention, by arranging the secondary winding with the smallest span in the same winding slot with the main winding, and making the proportion of the secondary winding and the main winding in the same winding slot satisfy 0.4≤S2/(S1+S2)≤0.8, the proportion of the secondary winding in the common slot can be increased, which is conducive to reducing the third harmonic content of the secondary winding, thereby improving the efficiency of the motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a stator component, a motor and a compressor.
Background
With the continuous improvement of energy efficiency requirements and the increasing of material cost, the improvement of motor energy efficiency and the pursuit of better cost performance are the technical directions of home appliance manufacturing enterprises which need to be particularly focused. The common winding distribution (main winding/auxiliary winding) of the capacitor operation type compressor is 5/4, 5/3, 4/3 and other structures. In the related art, in order to pursue high theoretical efficiency and reduce harmonic content of a main winding, copper wires are generally used for the main winding as much as possible, the number of layers of the main winding is more than that of auxiliary windings, and meanwhile, in the common slots of the main winding and the auxiliary windings, the slot filling rate of the main winding is larger than that of the auxiliary windings and is basically far larger than 50%. In the technical scheme, the auxiliary winding magnetic potential harmonic content is high, so that the problems of high loss, high noise, low reliability and the like are caused.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the invention proposes a stator component which has the advantages of high efficiency and low noise.
The invention also proposes an electric machine comprising a stator part as described above.
The invention also provides a compressor which comprises the motor.
A stator component according to an embodiment of the present invention includes: the stator core is provided with an axially-through stator hole, a plurality of stator teeth are arranged at intervals along the circumferential direction of the stator hole, and a wire winding groove is defined between any two adjacent stator teeth; the stator winding comprises a main winding and an auxiliary winding, the main winding and the auxiliary winding penetrate through the winding grooves to be wound on the stator teeth, wherein the auxiliary winding with the smallest span and the main winding are arranged in the same winding groove together, the sum of the cross sections of copper wires of the main winding in the same winding groove is S1, the sum of the cross sections of copper wires of the auxiliary winding is S2, and the requirements are satisfied: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8.
According to the stator winding provided by the embodiment of the invention, the auxiliary winding with the smallest span and the main winding are arranged in the same winding slot, and the ratio of the auxiliary winding to the main winding in the same winding slot is enabled to be less than or equal to 0.4 and less than or equal to S2/(S1+S2) and less than or equal to 0.8, so that the ratio of the auxiliary winding in the common slot can be improved, the third harmonic content of the auxiliary winding can be reduced, and the motor efficiency is improved.
According to some embodiments of the invention, the number of coil layers of the main winding per pole is m, the number of coil layers of the auxiliary winding per pole is n, and when m-n=2, the following is satisfied: S2/(S1+S2) is less than or equal to 0.45 and less than or equal to 0.8; when m-n=1, the following is satisfied: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8.
In some embodiments of the invention, m=5, n=3; or m=5, n=4; or m=4, n=3.
According to some embodiments of the invention, the following are satisfied: S2/(S1+S2) is less than or equal to 0.55 and less than or equal to 0.8.
In some embodiments of the invention, the third harmonic content of the secondary winding is Hn3, satisfying: and Hn3 is more than or equal to 5% and less than or equal to 15%, wherein Hn3=Y3/(Y1×3), Y3 is the total effective turns corresponding to the third harmonic, and Y1 is the total effective turns corresponding to the fundamental wave.
According to some embodiments of the invention, the number of coil layers of the main winding per pole is m, the number of coil layers of the auxiliary winding per pole is n, and when m-n=2, the following is satisfied: 10% or more and 15% or less of Hn 3% or less; when m-n=1, the following is satisfied: 5% or more and 10% or less of Hn 3% or less.
In some embodiments of the invention, m=5, n=3; or m=5, n=4; or m=4, n=3.
According to some embodiments of the invention, the stator core has an outer diameter D that satisfies: 121mm < D < 140mm.
According to an embodiment of the invention, the motor comprises: a rotor; the stator component is the stator component, the rotor is arranged in the stator hole, and the rotor can rotate relative to the stator.
According to the motor provided by the embodiment of the invention, the auxiliary winding and the main winding with the smallest span of the stator component are arranged in the same winding slot, and the ratio of the auxiliary winding to the main winding in the same winding slot is enabled to be less than or equal to 0.4 and less than or equal to S2/(S1+S2) and less than or equal to 0.8, so that the ratio of the auxiliary winding can be increased, the third harmonic content of the auxiliary winding can be reduced, and the motor efficiency can be improved.
According to an embodiment of the present invention, a compressor includes: the motor is the motor.
According to the compressor provided by the embodiment of the invention, the main winding and the auxiliary winding in the common slot of the motor stator have reasonable duty ratio, so that the third harmonic content of the auxiliary winding is effectively reduced, the consumption of a motor copper wire is reduced, the production cost of the compressor is reduced, and the cost performance of the compressor is improved.
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 component according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of windings of a stator winding according to an embodiment of the present invention
Reference numerals:
The stator assembly 100 is formed from a plurality of segments,
Stator core 10, stator bore 110, stator teeth 120, winding slots 130,
Stator winding 20, primary winding 210, secondary winding 220.
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," "inner," "outer," "axial," "radial," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
A stator part 100, a motor, and a compressor according to an embodiment of the present invention are described below with reference to fig. 1 and 2.
As shown in fig. 1 and 2, a stator part 100 according to an embodiment of the present invention, the stator part 100 includes: a stator core 10 and stator windings 20.
Specifically, as shown in fig. 1 and 2, the stator core 10 has a stator hole 110 penetrating in the axial direction, a plurality of stator teeth 120 are provided at intervals in the circumferential direction of the stator hole 110, and a winding groove 130 is defined between any two adjacent stator teeth 120. The stator winding 20 includes a main winding 210 and a sub-winding 220, and the main winding 210 and the sub-winding 220 are wound on the stator teeth 120 through the winding slots 130.
Wherein, the secondary winding 220 with the smallest span and the primary winding 210 are arranged in the same winding slot 130 together, the sum of the cross-sectional areas of the copper wires of the primary winding 210 in the same winding slot 130 is S1, the sum of the cross-sectional areas of the copper wires of the secondary winding 220 is S2, and the following conditions are satisfied: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8.
It should be noted that, as shown in fig. 2, each secondary winding 220 may include multiple layers of coils, and each layer of coils is disposed in two corresponding winding slots 130. The secondary winding 220 with the smallest span is understood to be a secondary winding 220 layer with the smallest number of stator teeth 120 between two corresponding winding slots 130 of each secondary winding 220 layer. As shown in fig. 2, each pole secondary winding 220 includes three layers of coils: a1 layer, a2 layer and a3 layer. Wherein, two winding slots 130 corresponding to the coils of the secondary winding 220 of the outermost layer a1 layer: the number of stator teeth 120 between 19 and 6 winding slots 130 (or 7 and 18 winding slots 130) is 11. Two winding slots 130 corresponding to the intermediate layer a2 secondary winding 220: the number of stator teeth 120 between the number 20 and number 5 winding slots 130 (or the number 8 and number 17 winding slots 130) is 9. Two winding slots 130 corresponding to the innermost layer a1 of the secondary winding 220: the number of stator teeth 120 between the number 21 and number 4 winding slots 130 (or the number 9 and number 16 winding slots 130) is 7. The secondary winding 220 with the smallest span among the a1 layer, the a2 layer, and the a3 layer is the a3 layer secondary winding 220. Winding slot 130 corresponding to a3 layer of secondary winding 220: in the winding slots 130 numbered 19, 6, 7 and 18, a main winding 210 and a sub winding 220 are provided at the same time. That is, the main winding 210 and the sub-winding 220 are arranged in common in the winding grooves 130 of numbers 19, 6, 7 and 18, and the sum of the cross-sectional areas of the copper wires of the main winding 210 is S1 and the sum of the cross-sectional areas of the copper wires of the sub-winding 220 is S2 in the winding grooves 130 of numbers 19, 6, 7 and 18, satisfying: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8.
According to the stator winding 20 of the embodiment of the invention, the secondary winding 220 with the smallest span and the main winding 210 are arranged in the same winding slot 130, and the ratio of the secondary winding 220 and the main winding 210 in the same winding slot 130 is enabled to be less than or equal to 0.4 and less than or equal to S2/(S1+S2) and less than or equal to 0.8, so that the ratio of the secondary winding 220 in the common slot can be improved, the third harmonic content of the secondary winding 220 is reduced, and the motor efficiency is improved.
According to some embodiments of the present invention, the number of coil layers of the main winding 210 per pole is m, the number of coil layers of the sub-winding 220 per pole is n, and when m-n=2, it satisfies: S2/(S1+S2) is less than or equal to 0.45 and less than or equal to 0.8; when m-n=1, the following is satisfied: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8. Experiments prove that when m-n=2, the following conditions are satisfied: S2/(S1+S2) is less than or equal to 0.45 and less than or equal to 0.8; when m-n=1, the following is satisfied: when S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8, the harmonic content of the main winding 210 and the auxiliary winding 220 can be effectively controlled within the optimal range, and the motor efficiency is effectively improved.
In some embodiments of the invention, m=5, n=3; or m=5, n=4; or m=4, n=3. That is, each pole primary winding 210 may include 5 layers of coils and each pole secondary winding 220 may include 3 layers of coils, where: S2/(S1+S2) is less than or equal to 0.45 and less than or equal to 0.8; or the main winding 210 may include 5 layers of coils per pole, and the auxiliary winding 220 includes 4 layers of coils per pole, where: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8; or the main winding 210 comprises 4 layers of coils per pole, and the auxiliary winding 220 comprises 3 layers of coils per pole, satisfying the following conditions: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8. Experiments prove that by setting the coil layer numbers of the main winding 210 and the auxiliary winding 220 and the duty ratio relation of the auxiliary winding 220 in the common slot, the third harmonic content of the main winding 210 and the auxiliary winding 220 can be effectively reduced, and the motor efficiency is improved.
According to some embodiments of the invention, the following are satisfied: S2/(S1+S2) is less than or equal to 0.55 and less than or equal to 0.8. Experiments prove that when the following conditions are satisfied: when S2/(S1+S2) is less than or equal to 0.55 and less than or equal to 0.8, the utilization rate of copper wires can be improved, the harmonic content of the main winding 210 and the auxiliary winding 220 is controlled in a better range, and the motor efficiency and the motor cost performance are improved.
In some embodiments of the present invention, the third harmonic content of secondary winding 220 is Hn3, satisfying: and Hn3 is more than or equal to 5% and less than or equal to 15%, wherein Hn3=Y3/(Y1×3), Y3 is the total effective turns corresponding to the third harmonic, and Y1 is the total effective turns corresponding to the fundamental wave.
It should be noted that, each secondary winding 220 may include n layers of coils, each layer of coils is correspondingly disposed in two winding slots 130, the number of stator teeth 120 included between two winding slots 130 corresponding to each layer of coils is Ya1, ya2, …, yan in order from the outermost side to the innermost side of the n layers of coils, where Q/2 > Ya1 > Ya2 > … > Yan, and Q is the total number of winding slots 130. The n-layer coils of each secondary winding 220 are sequentially called a secondary winding 220 first coil a1, a secondary winding 220 second coils a2, …, and a secondary winding 220 nth coil an from the outermost side to the innermost side according to the number of stator teeth 120 included between two winding slots 130 corresponding to each layer of coils.
The number of turns included in the n-layer coil of the sub-winding 220 is A1, A2, …, an in order from the first coil A1 of the sub-winding 220 to the n-th coil An of the sub-winding 220. The effective turn factors of the third harmonic generated by each layer of coil action of each pole secondary winding 220 are X31, X32, … X3n, respectively, whereinThe total effective turns corresponding to the third harmonic are: y3= (x31×a1+x32×a2+ … x3n×an). The effective turn factor of the fundamental wave is: /(I)The total effective turns of the fundamental wave generation is y1= (x11×a1+x12×a2+ … +x1n×an), and the third harmonic content hn3=y3/(y1×3) of the secondary winding 220.
As shown in fig. 1 and 2, the total number Q of winding slots 130 is 24, each pole of secondary winding 220 includes three layers of coils, namely a primary winding a1 of secondary winding 220, a secondary winding 220 secondary winding a2 and a tertiary winding a3 of secondary winding 220, and the number of stator teeth 120 between two winding slots 130 corresponding to each layer of secondary winding 220 coil is y1=11, y2=9 and y3=7 in sequence. The number of turns corresponding to the coils of each layer of the secondary winding 220 is a1=35, a2=25 and a3=22 in sequence. The effective turn factor of the third harmonic generated by the first coil a1 of the secondary winding 220 is:
The effective turns factor of the third harmonic generated by the second coil a2 of the secondary winding 220 is:
the effective turn factor of the third harmonic generated by the third coil a3 of the secondary winding 220 is:
The total number of effective turns y3= (x31×a1+x32×a2+x33×a3) = (-0.9239) ×35+ (-0.3827) ×25+0.3827×22= -33.5) of this third harmonic generation.
The effective turn factor of the fundamental wave is:
The total effective turns y1= (x11×a1+x12×a2+x13×a3) = (0.9914) ×35+ (0.9239) ×25+0.7934×22=75.3 of the fundamental wave. Calculated is |hn3|= |y3/(y1×3) |= | -33.5/(75.3×3) |=14.8%.
In addition, the number of turns of each layer of coil of the main winding 210 is: m1=51, m2=51, m3=50, m4=24, m5=21, winding wire diameter 1.0mm, and sub winding 220 wire diameter 1.0. The sum of the cross-sectional areas of copper wires S2 of the secondary winding 220 of the a3 layer with the smallest span is calculated to be 17.28mm 2, the sum of the cross-sectional areas of copper wires S1 of the primary winding 210 is calculated to be 18.85mm 2, and the ratio of the secondary winding 220 in the common slot with the smallest span of the secondary winding 220 is calculated to be S2/(s1+s2) =47.8%.
In the related art, the number of turns corresponding to each layer of main winding coil is m1=50, m2=50, m3=48, m4=30, m5=20, and the wire diameter of the main winding is 1.0mm. The number of turns corresponding to each layer of auxiliary winding is A1=46, A2=22, A3=12, and the wire diameter of the auxiliary winding is 1.025. The total copper wire cross-sectional area of the main winding in the common slot with the minimum auxiliary winding span is calculated as follows: s1=m4×3.14159× (1/2) 2＝23.56mm2; the sum of the copper wire cross-sectional areas of secondary winding 220 is: s2=a3×3.14159× (1.025/2) 2＝12×3.14159×(1.025/2)×(1.025/2)＝9.9mm2.
The duty cycle of the secondary winding 220 is S2/(s1+s2) =29.6%, and the third harmonic content of the secondary winding is calculated as: i Hn3 i= |y 3/(y1×3) |= | -46.3/(75.5×3) |=20.4%.
It can be seen that the third harmonic content of the secondary winding 220 of the present application is reduced from 20.4% to 14.8% and the copper wire consumption is reduced by about 4 g, thereby improving the motor efficiency and the cost performance of the motor, compared to the related art.
According to some embodiments of the present invention, the number of coil layers of the main winding 210 per pole is m, the number of coil layers of the sub-winding 220 per pole is n, and when m-n=2, it satisfies: and Hn3 is more than or equal to 10% and less than or equal to 15%. That is, when the number of layers of the main winding 210 per pole is two more than the number of layers of the sub winding 220 per pole, the third harmonic content of the sub winding 220 is controlled to satisfy: experiments prove that when the range setting is satisfied, the third harmonic content of the main winding 210 and the auxiliary winding 220 can be effectively controlled, and the motor performance is improved.
When m-n=1, the following is satisfied: 5% or more and 10% or less of Hn 3% or less. That is, when the number of layers of the main winding 210 per pole is one more than the number of layers of the sub winding 220 per pole, the third harmonic content of the sub winding 220 is controlled to satisfy: experiments prove that when the range setting is satisfied, the third harmonic content of the main winding 210 and the auxiliary winding 220 can be effectively controlled, and the motor performance is improved.
In some embodiments of the invention, m=5, n=3; or m=5, n=4; or m=4, n=3. That is, the number of coil layers of the main winding 210 per pole may be 5, the number of coil layers of the sub winding 220 per pole may be 3, and the third harmonic content is controlled to satisfy: 10% or more and 15% or less of Hn 3% or less; the number of coil layers of each pole of the main winding 210 can be 5, the number of coil layers of each pole of the auxiliary winding 220 can be 4, and the control third harmonic content satisfies the following conditions: 5% or more and 10% or less of Hn 3% or less; of course, the number of coil layers of the main winding 210 of each pole is 4, the number of coil layers of the auxiliary winding 220 of each pole is 3, and the content of the third harmonic is controlled to satisfy the following conditions: 5% or more and 10% or less of Hn 3% or less.
According to some embodiments of the present invention, the stator core 10 has an outer diameter D that satisfies: 121mm < D < 140mm. Experiments prove that when the outer diameter D of the iron core of the stator meets the following conditions: 121mm < D < 140mm, and the secondary winding 220 with the smallest span and the main winding 210 are arranged in the same winding slot 130 together, the sum of the cross-sectional areas of the copper wires of the main winding 210 in the same winding slot 130 is S1, the sum of the cross-sectional areas of the copper wires of the secondary winding 220 is S2, and the following conditions are satisfied: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8. Therefore, the duty ratio of the main winding 210 and the auxiliary winding 220 in the common slot can be reasonable, the third harmonic content of the main winding 210 and the auxiliary winding 220 can be effectively controlled, and the motor performance is improved.
According to an embodiment of the present invention, a motor includes: a rotor and a stator part 100, the stator part 100 being the stator part 100 described above, the rotor being arranged in the stator bore 110 and the rotor being rotatable relative to the stator.
According to the motor of the embodiment of the invention, the secondary winding 220 with the smallest span of the stator component 100 and the primary winding 210 are arranged in the same winding slot 130, and the ratio of the secondary winding 220 to the primary winding 210 in the same winding slot 130 is enabled to be less than or equal to 0.4 and less than or equal to S2/(S1+S2) and less than or equal to 0.8, so that the ratio of the secondary winding 220 can be increased, the third harmonic content of the secondary winding 220 can be reduced, and the motor efficiency can be improved.
According to the compressor provided by the embodiment of the invention, the compressor comprises the motor.
According to the compressor provided by the embodiment of the invention, the main winding 210 and the auxiliary winding 220 in the common slot of the motor stator have reasonable duty ratio, so that the third harmonic content of the auxiliary winding 220 is effectively reduced, the consumption of motor copper wires is reduced, the production cost of the compressor is reduced, and the cost performance of the compressor is improved.
A stator component 100 according to an embodiment of the present invention is described in detail below with reference to fig. 1 and 2 in a specific embodiment. It is to be understood that the following description is exemplary only and is not intended to limit the invention in any way.
As shown in fig. 1 and 2, the stator part 100 includes: a stator core 10 and stator windings 20.
The stator core 10 has an outer diameter D, and satisfies: 121mm < D < 140mm. The stator core 10 has a stator hole 110 penetrating in the axial direction, a plurality of stator teeth 120 are provided at intervals in the circumferential direction of the stator hole 110, and a winding groove 130 is defined between any two adjacent stator teeth 120.
The stator winding 20 includes a main winding 210 and a sub-winding 220, and the main winding 210 and the sub-winding 220 are wound on the stator teeth 120 through the winding slots 130. The main winding 210 is connected to a power source, and the sub-winding 220 is connected to a capacitor and then connected in parallel to the main winding 210. As shown in fig. 2, each main winding 210 includes five layers of coils, from outside to inside: m1 layer, M2 layer, M3 layer, M4 layer, M5 layer, the number of turns of each layer of main winding 210 is m1=51, m2=51, m3=50, m4=24, m5=21, and the winding wire diameter is 1.0mm. Each pole of the secondary winding 220 comprises three layers of coils, which are respectively from outside to inside: a1 layer, a2 layer and a3 layer. The number of turns of each layer of secondary winding 220 is a1=35, a2=25, a3=22, and the secondary winding 220 has a wire diameter of 1.0.
The number of stator teeth 120 between two winding slots 130 corresponding to the a1 layer is 11, the number of stator teeth 120 between two winding slots 130 corresponding to the a2 layer is 9, and the number of stator teeth 120 in between two winding slots 130 corresponding to the a3 layer is 7.
The secondary winding 220 of the a3 layer with the smallest span and the primary winding 210 are arranged in the same wire slot 130 (the wire slot 130 with the serial numbers of 21, 4, 9 and 16), the sum of the copper wire cross-sectional areas of the secondary winding 220 in the wire slot 130 with the serial numbers of 21, 4, 9 and 16 is calculated to be 17.28mm 2, the sum of the copper wire cross-sectional areas of the primary winding 210 is 18.85mm 2, and the proportion of the secondary winding 220 in the common slot is S2/(S1+S2) =47.8%. The third harmonic content |h3|= |y 3/(y1×3) |=14.8% of the secondary winding 220 is calculated.
Therefore, by arranging the secondary winding 220 with the smallest span and the primary winding 210 to be positioned in the same winding slot 130, and enabling the ratio of the secondary winding 220 and the primary winding 210 in the same winding slot 130 to be less than or equal to 0.4 and less than or equal to S2/(S1+S2) and less than or equal to 0.8, the ratio of the secondary winding 220 in the common slot can be improved, the third harmonic content of the secondary winding 220 can be reduced, and the motor efficiency can be improved. Moreover, the consumption of copper wires is reduced, and the utilization rate of the copper wires is improved, so that the cost performance of the motor is improved.
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 (10)
1. A stator component, comprising:
the stator core is provided with an axially-through stator hole, a plurality of stator teeth are arranged at intervals along the circumferential direction of the stator hole, and a wire winding groove is defined between any two adjacent stator teeth;
A stator winding including a main winding and an auxiliary winding wound on the stator teeth through the winding slots,
The auxiliary winding with the smallest span and the main winding are arranged in the same winding groove together, the sum of the cross sectional areas of the copper wires of the main winding in the same winding groove is S1, the sum of the cross sectional areas of the copper wires of the auxiliary winding is S2, and the requirements are met: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8.
2. The stator component of claim 1 wherein the number of layers of windings of the primary winding is m per pole and the number of layers of windings of the secondary winding is n per pole,
When m-n=2, the following is satisfied: S2/(S1+S2) is less than or equal to 0.45 and less than or equal to 0.8;
When m-n=1, the following is satisfied: S2/(S1+S2) is less than or equal to 0.4 and less than or equal to 0.8.
3. The stator component of claim 2, wherein m = 5, n = 3; or m=5, n=4; or m=4, n=3.
4. The stator component of claim 1, wherein: S2/(S1+S2) is less than or equal to 0.55 and less than or equal to 0.8.
5. The stator component of claim 1, wherein the third harmonic content of the secondary winding is Hn3, satisfying: and Hn3 is more than or equal to 5% and less than or equal to 15%, wherein Hn3=Y3/(Y1×3), Y3 is the total effective turns corresponding to the third harmonic, and Y1 is the total effective turns corresponding to the fundamental wave.
6. The stator component of claim 5 wherein the number of layers of windings of the primary winding is m per pole and the number of layers of windings of the secondary winding is n per pole,
When m-n=2, the following is satisfied: 10% or more and 15% or less of Hn 3% or less;
when m-n=1, the following is satisfied: 5% or more and 10% or less of Hn 3% or less.
7. The stator component of claim 6, wherein m = 5, n = 3; or m=5, n=4; or m=4, n=3.
8. The stator component of claim 1, wherein the stator core has an outer diameter D that satisfies: 121mm < D < 140mm.
9. An electric machine, the electric machine comprising:
a rotor;
a stator component, the stator component being a stator component according to any one of claims 1-8, the rotor being disposed within the stator bore and the rotor being rotatable relative to the stator.
10. A compressor, comprising:
a motor, which is the motor according to claim 9.
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| AT14389U1 (en) * | 2014-04-22 | 2015-10-15 | Secop Austria Gmbh | Winding of an electric motor |
| CN104467231B (en) * | 2014-12-12 | 2018-01-12 | 广东美芝制冷设备有限公司 | For rotary compressor motor and there is its compressor |
| CN106059132A (en) * | 2016-07-18 | 2016-10-26 | 广东美芝制冷设备有限公司 | Compressor stator and compressor provided with same |
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