CN110875662A - Stator component, motor and compressor - Google Patents
Stator component, motor and compressor Download PDFInfo
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- CN110875662A CN110875662A CN201811015725.2A CN201811015725A CN110875662A CN 110875662 A CN110875662 A CN 110875662A CN 201811015725 A CN201811015725 A CN 201811015725A CN 110875662 A CN110875662 A CN 110875662A
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- 238000004804 winding Methods 0.000 claims abstract description 285
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 23
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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
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Abstract
The invention discloses a stator component, a motor and a compressor, wherein the stator component comprises: the stator core and the stator winding are provided with a plurality of stator teeth 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 comprises a main winding and an auxiliary winding, and the main winding and the auxiliary winding penetrate through the winding slots and are wound on the stator teeth. Wherein, the minimum secondary winding of span and main winding locate same winding groove jointly, and the sum of the cross-sectional area of the copper line of main winding in same winding groove is S1, and the sum of the cross-sectional area of the copper line of secondary winding is S2, satisfies: S2/(S1+ S2) is not less than 0.4 and not more than 0.8. According to the stator part, the auxiliary winding with the minimum span and the main winding are arranged in the same winding groove, and the ratio of the auxiliary winding to the main winding in the same winding groove is more 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 groove can be improved, the third harmonic content of the auxiliary winding can be reduced, and the motor efficiency is improved.
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 increasing energy efficiency requirements and the increasing material costs, the improvement of the motor energy efficiency and the pursuit of a higher performance-price ratio are the technological directions of particular importance of household electrical appliance manufacturing enterprises. The winding distribution (main winding/secondary winding) commonly used in the capacitor-operated 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 the main winding, the main winding usually uses copper wires as many as possible, the number of layers of the main winding is more than that of the secondary winding, and meanwhile, in the common slot of the main winding and the secondary winding, the slot fullness ratio of the main winding is more than that of the secondary winding and is basically far more than 50%. In the technical scheme, the secondary winding has high magnetic potential harmonic content, so that the problems of high loss, high noise, low reliability and the like are caused.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, the invention proposes a stator component having the advantages of high efficiency and low noise.
The invention also provides a motor, which comprises the stator component.
The invention also provides a compressor, which comprises the motor.
A stator component according to an embodiment of the invention comprises: the stator core is provided with a stator hole which is axially communicated, 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 comprises a main winding and an auxiliary winding, the main winding and the auxiliary winding are 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 slot together, the sum of the cross-sectional areas of copper wires of the main winding in the same winding slot is S1, the sum of the cross-sectional areas of the copper wires of the auxiliary winding is S2, and the requirements are that: S2/(S1+ S2) is not less than 0.4 and not more than 0.8.
According to the stator winding provided by the embodiment of the invention, the auxiliary winding with the minimum 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 meet 0.4-0. 2/(S1+ S2) -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 present invention, the number of coil layers of the primary winding per pole is m, the number of coil layers of the secondary winding per pole is n, and when m-n is 2, the following is satisfied: S2/(S1+ S2) is more than or equal to 0.45 and less than or equal to 0.8; when m-n is 1, the following is satisfied: S2/(S1+ S2) is not less than 0.4 and not more than 0.8.
In some embodiments of the present invention, m is 5, n is 3; or m is 5, n is 4; or m is 4 and n is 3.
According to some embodiments of the invention, the following are satisfied: S2/(S1+ S2) is not less than 0.55 and not more than 0.8.
In some embodiments of the invention, the third harmonic content of the secondary winding is Hn3, satisfying: the absolute value of Hn3 is more than or equal to 5% and less than or equal to 15%, wherein Hn3 is Y3/(Y1 x 3), Y3 is the total effective turn number corresponding to the third harmonic, and Y1 is the total effective turn number corresponding to the fundamental wave.
According to some embodiments of the present invention, the number of coil layers of the primary winding per pole is m, the number of coil layers of the secondary winding per pole is n, and when m-n is 2, the following is satisfied: the absolute Hn3 is more than or equal to 10 percent and less than or equal to 15 percent; when m-n is 1, the following is satisfied: the absolute Hn3 is more than or equal to 5 percent and less than or equal to 10 percent.
In some embodiments of the present invention, m is 5, n is 3; or m is 5, n is 4; or m is 4 and n is 3.
According to some embodiments of the invention, the stator core has an outer diameter D satisfying: d is more than 121mm and less than 140 mm.
According to an embodiment of the present invention, a motor includes: 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 minimum 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 meet the requirement that the ratio of S2/(S1+ S2) is more than or equal to 0.4 and less than or equal to 0.8, so that the ratio of the auxiliary winding can be improved, the third harmonic content of the auxiliary winding is reduced, and the motor efficiency is improved.
The compressor according to the embodiment of the present invention includes: the motor is the motor.
According to the compressor provided by the embodiment of the invention, the ratio of the main winding to the auxiliary winding in the common slot of the motor stator is reasonable, the third harmonic content of the auxiliary winding is effectively reduced, the usage amount of the copper wire of the motor 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 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 component according to an embodiment of the invention;
FIG. 2 is a schematic winding diagram of a stator winding according to an embodiment of the present invention
Reference numerals:
the stator part 100 is provided with a stator,
the stator core 10, the stator hole 110, the stator teeth 120, the winding slots 130,
stator winding 20, main winding 210, secondary winding 220.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the positional or orientational relationships shown in the drawings to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The stator part 100, the motor, and the 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, according to a stator part 100 of an embodiment of the present invention, the stator part 100 includes: stator core 10 and stator winding 20.
Specifically, as shown in fig. 1 and 2, the stator core 10 has a stator hole 110 penetrating axially, a plurality of stator teeth 120 are provided at intervals in a circumferential direction of the stator hole 110, and a winding slot 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 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 requirements are met: S2/(S1+ S2) is not less than 0.4 and not more than 0.8.
It should be noted that, as shown in fig. 2, each of the secondary windings 220 may include a plurality of layers of coils, and each of the layers of coils is disposed in the corresponding two winding slots 130. The secondary winding 220 with the smallest span can be understood as the secondary winding 220 with the smallest number of stator teeth 120 between the two winding slots 130 corresponding to each layer of the secondary winding 220. As shown in fig. 2, each pole secondary winding 220 includes three layers of coils: a1 layer, a2 layer, and a3 layer. Wherein, the two winding slots 130 corresponding to the coils of the outermost layer a1 of the secondary winding 220 are: the number of the stator teeth 120 between the winding slots 130 numbered 19 and 6 (or the winding slots 130 numbered 7 and 18) is 11. Two winding slots 130 corresponding to the secondary winding 220 of the intermediate layer a 2: the number of stator teeth 120 between the winding slots 130 numbered 20 and 5 (or the winding slots 130 numbered 8 and 17) is 9. Two winding slots 130 corresponding to the innermost a1 layer of secondary winding 220: the number of stator teeth 120 between the winding slots 130 numbered 21 and 4 (or the winding slots 130 numbered 9 and 16) 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 of secondary windings 220. a3 layers of secondary windings 220 corresponding to winding slots 130: in the winding slots 130 numbered 19, 6, 7 and 18, both the main winding 210 and the sub-winding 220 are disposed. That is, the main winding 210 and the sub-winding 220 are disposed in the winding slots 130 numbered 19, 6, 7, and 18 in a common slot manner, and in the winding slots 130 numbered 19, 6, 7, and 18, 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, which satisfies: S2/(S1+ S2) is not less than 0.4 and not more than 0.8.
According to the stator winding 20 of the embodiment of the invention, the auxiliary winding 220 with the minimum span and the main winding 210 are arranged in the same winding slot 130, and the occupation ratio of the auxiliary winding 220 and the main winding 210 in the same winding slot 130 meets 0.4-S2/(S1 + S2) -0.8, so that the occupation ratio of the auxiliary winding 220 in the common slot can be improved, the third harmonic content of the auxiliary winding 220 can be reduced, and the motor efficiency is improved.
According to some embodiments of the present invention, the number of coil layers of each pole main winding 210 is m, the number of coil layers of each pole auxiliary winding 220 is n, and when m-n is 2, the following is satisfied: S2/(S1+ S2) is more than or equal to 0.45 and less than or equal to 0.8; when m-n is 1, the following is satisfied: S2/(S1+ S2) is not less than 0.4 and not more than 0.8. Through experimental verification, when m-n is 2, the following conditions are satisfied: S2/(S1+ S2) is more than or equal to 0.45 and less than or equal to 0.8; when m-n is 1, the following is satisfied: when S2/(S1+ S2) is more 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 in the optimal range, and the motor efficiency is effectively improved.
In some embodiments of the present invention, m is 5, n is 3; or m is 5, n is 4; or m is 4 and n is 3. That is, each pole main winding 210 may include a 5-layer coil, and each pole sub-winding 220 may include a 3-layer coil, where: S2/(S1+ S2) is more than or equal to 0.45 and less than or equal to 0.8; or each pole of the main winding 210 may comprise 5 layers of coils and each pole of the secondary winding 220 comprises 4 layers of coils, and when: S2/(S1+ S2) is more than or equal to 0.4 and less than or equal to 0.8; or each pole of the main winding 210 comprises 4 layers of coils, and each pole of the secondary winding 220 comprises 3 layers of coils, and the following conditions are satisfied: S2/(S1+ S2) is not less than 0.4 and not more than 0.8. Experiments prove that by setting the number of coil layers of the main winding 210 and the auxiliary winding 220 and the proportion 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 not less than 0.55 and not more than 0.8. Through experimental verification, when the following conditions are met: when S2/(S1+ S2) is more 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 efficiency of the motor and the cost performance of the motor are improved.
In some embodiments of the present invention, the third harmonic content of the secondary winding 220 is Hn3, satisfying: the absolute value of Hn3 is more than or equal to 5% and less than or equal to 15%, wherein Hn3 is Y3/(Y1 x 3), Y3 is the total effective turn number corresponding to the third harmonic, and Y1 is the total effective turn number corresponding to the fundamental wave.
It should be noted that each pole secondary winding 220 may include n layers of coils, each layer of coils is correspondingly disposed in two winding slots 130, the number of the stator teeth 120 included between the two winding slots 130 corresponding to each layer of coils is Ya1, Ya2, … and Yan in sequence 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 the winding slots 130. The n layers of coils of each secondary winding 220 are referred to as a first coil a1 of the secondary winding 220, second coils a2, … of the secondary winding 220, and an nth coil an of the secondary winding 220 in sequence 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 n layers of coils of the secondary winding 220 include a number of turns of a1, a2, …, An in order from the first coil a1 of the secondary winding 220 to the nth coil An of the secondary winding 220. The effective turn factors of the third harmonic generated by the action of each layer of coils of each pole secondary winding 220 are X31, X32, … X3n respectively, wherein
The 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:
the total effective number of turns generated by the fundamental wave is Y1 ═ X11 × a1+ X12 × a2+ … + X1n × An, and the third harmonic content Hn3 of the secondary winding 220 is Y3/(Y1 × 3).
As shown in fig. 1 and 2, the total number Q of the winding slots 130 is 24, each pole of the secondary winding 220 includes three layers of coils, namely, a first coil a1, a second coil a2 and a third coil a3 of the secondary winding 220, and the number of the stator teeth 120 between two corresponding winding slots 130 of each layer of the secondary winding 220 is sequentially Y1-11, Y2-9 and Y3-7. The number of turns corresponding to each layer of the secondary winding 220 is A1-35, A2-25 and A3-22. The effective turn factor of the third harmonic generated by the first coil a1 of the secondary winding 220 is:
the effective turn factor of the third harmonic generated by secondary winding 220 and second coil a2 is:
the effective turn factor of the third harmonic produced by the third coil a3 of the secondary winding 220 is:
the total effective number of turns Y3 for this third harmonic generation (X31 × a1+ X32 × a2+ X33 × A3) — 0.9239 × 35+ (-0.3827) × 25+0.3827 × 22 ═ 33.5.
The effective turn factor of the fundamental wave is:
the total effective number of turns Y1 of the fundamental wave is (X11 × a1+ X12 × a2+ X13 × A3) ═ 0.9914 × 35+ (0.9239) × 25+0.7934 × 22 ═ 75.3. Calculated, | Hn3| ═ Y3/(Y1 × 3) | -33.5/(75.3 × 3) | -, 14.8%.
In addition, the number of turns of each layer of the main winding 210 is: m1-51, M2-51, M3-50, M4-24, M5-21, winding diameter 1.0mm, and secondary winding 220 diameter 1.0. Is calculated to obtainThe sum S2 of the cross-sectional areas of the copper wires of the secondary windings 220 of the layer a3 with the smallest span is 17.28mm2The sum S1 of the cross-sectional areas of the copper wires of the main winding 210 is 18.85mm2The occupation ratio of the secondary winding 220 in the common slot with the smallest span of the secondary winding 220 is S2/(S1+ S2) 47.8%.
In the related art, the number of turns of 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 1.0 mm. The number of turns of each layer of secondary winding is A1-46, A2-22, A3-12, and the wire diameter of the secondary winding is 1.025. And calculating to obtain that the sum of the cross-sectional areas of the copper wires of the main winding in the common slot with the minimum secondary winding span is as follows: s1 ═ M4 × 3.14159 × (1/2)2＝23.56mm2(ii) a The sum of the cross-sectional areas of the copper wires of the secondary winding 220 is: s2 ═ A3 × 3.14159 × (1.025/2)2＝12×3.14159×(1.025/2)×(1.025/2)＝9.9mm2。
The ratio of the secondary winding 220 is S2/(S1+ S2) is 29.6%, and the third harmonic content of the secondary winding is calculated as: i Hn3| Y3/(Y1 × 3) | -46.3/(75.5 × 3) | 20.4%.
Therefore, compared with the related art, the third harmonic content of the secondary winding 220 of the present application is reduced from 20.4% to 14.8%, and the amount of copper wires is reduced by about 4 g, so that the efficiency of the motor and the cost performance of the motor are improved.
According to some embodiments of the present invention, the number of coil layers of each pole main winding 210 is m, the number of coil layers of each pole auxiliary winding 220 is n, and when m-n is 2, the following is satisfied: the absolute Hn3 is more than or equal to 10 percent and less than or equal to 15 percent. 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 the third harmonic content of the main winding 210 and the secondary winding 220 can be effectively controlled when the setting range is met, and the motor performance is improved.
When m-n is 1, the following is satisfied: the absolute Hn3 is more than or equal to 5 percent and less than or equal to 10 percent. 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 the third harmonic content of the main winding 210 and the secondary winding 220 can be effectively controlled when the setting range is met, and the motor performance is improved.
In some embodiments of the present invention, m is 5, n is 3; or m is 5, n is 4; or m is 4 and n is 3. That is, the number of coil layers of each pole of the main winding 210 may be 5, and the number of coil layers of each pole of the sub-winding 220 may be 3, where the third harmonic content is controlled to satisfy: the absolute Hn3 is more than or equal to 10 percent and less than or equal to 15 percent; the number of coil layers of each pole of the main winding 210 can also be 5, the number of coil layers of each pole of the secondary winding 220 can be 4, and at the moment, the third harmonic content is controlled to meet the following requirements: the absolute Hn3 is more than or equal to 5 percent and less than or equal to 10 percent; of course, the number of coil layers of each pole of the main winding 210 may be 4, and the number of coil layers of each pole of the auxiliary winding 220 may be 3, so that the third harmonic content is controlled to satisfy: the absolute Hn3 is more than or equal to 5 percent and less than or equal to 10 percent.
According to some embodiments of the present invention, the stator core 10 has an outer diameter D satisfying: d is more than 121mm and less than 140 mm. Through experimental verification, when the outer diameter D of the iron core of the stator meets the following requirements: the secondary winding 220 with the smallest span is arranged in the same winding groove 130 together with the main winding 210 when the distance is 121mm < D < 140mm, the sum of the cross-sectional areas of the copper wires of the main winding 210 in the same winding groove 130 is S1, the sum of the cross-sectional areas of the copper wires of the secondary winding 220 is S2, and the following requirements are met: S2/(S1+ S2) is not less than 0.4 and not more than 0.8. Therefore, the occupation ratio of the main winding 210 and the auxiliary winding 220 in the common slot is 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 component 100, the stator component 100 being the stator component 100 described above, the rotor being disposed 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 auxiliary winding 220 with the minimum span of the stator component 100 and the main winding 210 are arranged in the same winding slot 130, and the occupation ratio of the auxiliary winding 220 and the main winding 210 in the same winding slot 130 meets 0.4-S2/(S1 + S2) -0.8, so that the occupation ratio of the auxiliary winding 220 can be improved, the third harmonic content of the auxiliary winding 220 is reduced, and the motor efficiency is 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 ratio of the main winding 210 and the auxiliary winding 220 in the common slot of the motor stator is reasonable, the third harmonic content of the auxiliary winding 220 is effectively reduced, the copper wire consumption of the motor is reduced, the production cost of the compressor is reduced, and the cost performance of the compressor is improved.
The stator part 100 according to an embodiment of the present invention is described in detail in a specific embodiment with reference to fig. 1 and 2. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.
As shown in fig. 1 and 2, the stator part 100 includes: stator core 10 and stator winding 20.
Wherein, stator core 10's external diameter is D, satisfies: d is more than 121mm and less than 140 mm. The stator core 10 has a stator hole 110 axially penetrating therethrough, a plurality of stator teeth 120 are provided at intervals in a circumferential direction of the stator hole 110, and a winding slot 130 is defined between any adjacent two of the 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 pole of the main winding 210 includes five layers of coils, which are respectively from outside to inside: m1 layers, M2 layers, M3 layers, M4 layers and M5 layers, wherein the number of turns of the main winding 210 in each layer is respectively M1-51, M2-51, M3-50, M4-24, M5-21, and the winding wire diameter is 1.0 mm. Each pole secondary winding 220 comprises three layers of coils, from outside to inside: a1 layer, a2 layer and a3 layer. The number of turns of the secondary winding 220 in each layer is respectively a 1-35, a 2-25, A3-22, and the wire diameter of the secondary winding 220 is 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 between two winding slots 130 corresponding to the a3 layer is 7.
The a 3-layer sub-windings 220 having the smallest span are provided in the same winding slot 130 (winding slots 130 numbered 21, 4, 9 and 16) together with the main winding 210, and can be calculated by21. The sum of the sectional areas of the copper wires of the secondary windings 220 in the winding slots 130 of 4, 9 and 16 is 17.28mm2The sum of the cross-sectional areas of the copper wires of the main winding 210 is 18.85mm2The share ratio of the sub-winding 220 in the common slot is S2/(S1+ S2) to 47.8%. The third harmonic content | Hn3| ═ Y3/(Y1 × 3) | ═ 14.8% of the secondary winding 220 can be calculated.
Therefore, the auxiliary winding 220 with the smallest span and the main winding 210 are arranged in the same winding slot 130, and the occupation ratio of the auxiliary winding 220 and the main winding 210 in the same winding slot 130 meets the requirement that S2/(S1+ S2) is more than or equal to 0.4 and less than or equal to 0.8, so that the occupation ratio of the auxiliary winding 220 in the common slot can be improved, the third harmonic content of the auxiliary winding 220 can be reduced, and the motor efficiency is improved. Moreover, the consumption of copper wires is reduced, the utilization rate of the copper wires is improved, and the cost performance of the motor is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit 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 a stator hole which is axially communicated, 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 comprises a main winding and an auxiliary winding, the main winding and the auxiliary winding pass through the winding slots and are wound on the stator teeth,
the secondary winding with the smallest span and the main winding are arranged in the same winding slot together, the sum of the cross-sectional areas of copper wires of the main winding in the same winding slot is S1, the sum of the cross-sectional areas of the copper wires of the secondary winding is S2, and the requirements are that: S2/(S1+ S2) is not less than 0.4 and not more than 0.8.
2. The stator component of claim 1, wherein the number of coil layers per pole of the primary winding is m, the number of coil layers per pole of the secondary winding is n,
when m-n is 2, the following is satisfied: S2/(S1+ S2) is more than or equal to 0.45 and less than or equal to 0.8;
when m-n is 1, the following is satisfied: S2/(S1+ S2) is not less than 0.4 and not more than 0.8.
3. The stator component of claim 2, wherein m-5, n-3; or m is 5, n is 4; or m is 4 and n is 3.
4. The stator component of claim 1, wherein: S2/(S1+ S2) is not less than 0.55 and not more than 0.8.
5. The stator component of claim 1, wherein the secondary winding has a third harmonic content Hn3, satisfying: the absolute value of Hn3 is more than or equal to 5% and less than or equal to 15%, wherein Hn3 is Y3/(Y1 x 3), Y3 is the total effective turn number corresponding to the third harmonic, and Y1 is the total effective turn number corresponding to the fundamental wave.
6. The stator component of claim 5, wherein the number of coil layers per pole of the primary winding is m, the number of coil layers per pole of the secondary winding is n,
when m-n is 2, the following is satisfied: the absolute Hn3 is more than or equal to 10 percent and less than or equal to 15 percent;
when m-n is 1, the following is satisfied: the absolute Hn3 is more than or equal to 5 percent and less than or equal to 10 percent.
7. The stator component of claim 6, wherein m-5, n-3; or m is 5, n is 4; or m is 4 and n is 3.
8. The stator component of claim 1, wherein the stator core has an outer diameter D that satisfies: d is more than 121mm and less than 140 mm.
9. An electric machine, characterized in that the electric machine comprises:
a rotor;
a stator component according to any one of claims 1 to 8, the rotor being disposed within the stator bore and rotatable relative to the stator.
10. A compressor, comprising:
an electrical machine according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811015725.2A CN110875662A (en) | 2018-08-31 | 2018-08-31 | Stator component, motor and compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811015725.2A CN110875662A (en) | 2018-08-31 | 2018-08-31 | Stator component, motor and compressor |
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| CN110875662A true CN110875662A (en) | 2020-03-10 |
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| CN201811015725.2A Pending CN110875662A (en) | 2018-08-31 | 2018-08-31 | Stator component, motor and compressor |
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| CN208423989U (en) * | 2018-08-31 | 2019-01-22 | 广东美芝制冷设备有限公司 | Stator component, motor and compressor |
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