CN110875662A - Stator component, motor and compressor - Google Patents

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

Stator components, motors and compressors

technical field

The present invention relates to the technical field of motors, and in particular, to a stator component, a motor and a compressor.

Background technique

With the continuous improvement of energy efficiency requirements and the increasing cost of materials, improving the energy efficiency of motors and pursuing better cost performance are the technical directions that home appliance manufacturers need to pay special attention to. The winding distribution (main winding/secondary winding) commonly used in capacitor-operated compressors is 5/4, 5/3, 4/3 and other structures. In the related art, in order to pursue high theoretical efficiency and reduce the harmonic content of the main winding, the main winding usually uses as much copper wire as possible. , the slot full ratio of the main winding is larger than that of the secondary winding, and is basically far greater than 50%. In the above technical solution, the secondary winding has a high magnetic potential harmonic content, which brings about problems such as large loss, high noise, and low reliability.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a stator component, which has the advantages of high efficiency and low noise.

The present invention also provides a motor, which includes the above-mentioned stator component.

The present invention also provides a compressor, which includes the above-mentioned motor.

The stator component according to the embodiment of the present invention includes: a stator iron core, the stator iron core has a stator hole passing through in the axial direction, and a plurality of stator teeth are arranged at intervals along the circumferential direction of the stator hole, and any adjacent two A winding slot is defined between the stator teeth; the stator winding includes a primary winding and a secondary winding, and the primary winding and the secondary winding pass through the winding slot and are wound around the stator teeth above, wherein the secondary winding with the smallest span and the main winding are jointly arranged in the same winding slot, 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 winding of the embodiment of the present invention, the secondary winding with the smallest span and the main winding are located in the same winding slot, and the ratio of the secondary winding and the main winding in the same winding slot satisfies 0.4≤S2/(S1 +S2)≤0.8, which can increase the proportion of the secondary winding in the common slot, which is beneficial to reduce the third harmonic content of the secondary winding, thereby improving the motor efficiency.

According to some embodiments of the present invention, the number of coil layers of the main winding per pole is m, and the number of coil layers of the secondary winding per pole is n. When m−n=2, it satisfies: 0.45≤S2/(S1+S2 )≤0.8; when m-n=1, it satisfies: 0.4≤S2/(S1+S2)≤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 present invention, it satisfies: 0.55≤S2/(S1+S2)≤0.8.

In some embodiments of the present invention, the third harmonic content of the secondary winding is Hn3, which satisfies: 5%≤|Hn3|≤15%, wherein Hn3=Y3/(Y1×3), and Y3 is the third harmonic The corresponding total effective turns, Y1 is the total effective turns corresponding to the fundamental wave.

According to some embodiments of the present invention, the number of coil layers of the main winding per pole is m, and the number of coil layers of the secondary winding per pole is n. When m−n=2, it satisfies: 10%≤|Hn3|≤15 %; when m-n=1, it satisfies: 5%≤|Hn3|≤10%.

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 present invention, the outer diameter of the stator core is D, which satisfies: 121mm<D<140mm.

According to the motor of the embodiment of the present invention, the motor includes: a rotor; a stator part, the stator part is the above-mentioned stator part, the rotor is arranged in the stator hole, and the rotor is movable relative to the stator turn.

According to the motor of the embodiment of the present invention, the secondary winding and the main winding with the smallest span of the stator part are located in the same winding slot, and the ratio of the secondary winding and the main winding in the same winding slot satisfies 0.4≤S2/ (S1+S2)≤0.8, the proportion of the secondary winding can be increased, the third harmonic content of the secondary winding can be reduced, and the motor efficiency can be improved.

A compressor according to an embodiment of the present invention includes: a motor, and the motor is the above-mentioned motor.

According to the compressor of the embodiment of the present invention, the proportion of the main winding and the auxiliary winding in the common slot of the motor stator is reasonable, the third harmonic content of the auxiliary winding is effectively reduced, and the amount of copper wire of the motor is reduced. The production cost improves the cost performance of the compressor.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

1 is a schematic structural diagram of a stator component according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a winding of a stator winding according to an embodiment of the present invention

Reference number:

stator part 100,

The stator core 10, the stator hole 110, the stator teeth 120, the winding slot 130,

Stator winding 20 , main winding 210 , secondary winding 220 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the accompanying drawings The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a reference to the present invention. limits. Furthermore, features delimited with "first", "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

The stator part 100 , the motor and the compressor according to the embodiment of the present invention will be described below with reference to FIGS. 1 and 2 .

As shown in FIGS. 1 and 2 , according to the stator component 100 of the embodiment of the present invention, the stator component 100 includes: a stator iron core 10 and a stator winding 20 .

Specifically, as shown in FIGS. 1 and 2 , the stator core 10 has a stator hole 110 penetrating in the axial direction, and a plurality of stator teeth 120 are provided at intervals along the circumferential direction of the stator hole 110 . Any two adjacent stators A winding slot 130 is defined between the teeth 120 . The stator winding 20 includes a main winding 210 and a secondary winding 220 , and the main winding 210 and the secondary winding 220 are wound on the stator teeth 120 through the winding slot 130 .

Among them, the secondary winding 220 with the smallest span and the main winding 210 are jointly arranged in the same winding slot 130, the sum of the cross-sectional areas of the copper wires of the main winding 210 in the same winding slot 130 is S1, and the The sum of the cross-sectional areas of the copper wires is S2, which satisfies: 0.4≤S2/(S1+S2)≤0.8.

It should be noted that, as shown in FIG. 2 , the secondary winding 220 of each pole may include multiple layers of coils, and each layer of coils is arranged in the corresponding two winding slots 130 . The secondary winding 220 with the smallest span can be understood as the secondary winding 220 layer 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. Among them, the two winding slots 130 corresponding to the coils of the secondary winding 220 of the outermost layer a1 are: between the winding slots 130 numbered 19 and 6 (or the winding slots 130 numbered 7 and 18) The number of stator teeth 120 is 11. The two winding slots 130 corresponding to the secondary winding 220 of the middle layer a2: the number of stator teeth 120 between the winding slots 130 numbered 20 and 5 (or the winding slots 130 numbered 8 and 17) to 9. Two winding slots 130 corresponding to the secondary windings 220 of the innermost a1 layer: the stator teeth 120 between the winding slots 130 numbered 21 and 4 (or the winding slots 130 numbered 9 and 16) The number is 7. Then, the secondary winding 220 with the smallest span in the a1 layer, the a2 layer and the a3 layer is the a3 layer secondary winding 220 . The winding slots 130 corresponding to the secondary windings 220 of the a3 layer: the winding slots 130 numbered 19, 6, 7 and 18 are provided with the main winding 210 and the secondary winding 220 at the same time. That is, the main winding 210 and the secondary winding 220 are arranged in the same slot in the winding slots 130 numbered 19, 6, 7 and 18, and in the winding slots 130 numbered 19, 6, 7 and 18, the copper of the main winding 210 The sum of the cross-sectional areas of the wires is S1, and the sum of the cross-sectional areas of the copper wires of the secondary winding 220 is S2, which satisfies: 0.4≤S2/(S1+S2)≤0.8.

According to the stator winding 20 of the embodiment of the present invention, the secondary winding 220 with the smallest span and the main winding 210 are located in the same winding slot 130, and the ratio of the secondary winding 220 to the main winding 210 in the same winding slot 130 is set Satisfying 0.4≤S2/(S1+S2)≤0.8 can increase the proportion of the secondary windings 220 in the common slot, which is beneficial to reduce the third harmonic content of the secondary windings 220, thereby improving the motor efficiency.

According to some embodiments of the present invention, the number of coil layers of the main winding 210 per pole is m, and the number of coil layers of the secondary winding 220 of each pole is n. When m−n=2, it satisfies: 0.45≤S2/(S1+S2)≤ 0.8; when m-n=1, it satisfies: 0.4≤S2/(S1+S2)≤0.8. It has been verified by experiments that when m-n=2, it satisfies: 0.45≤S2/(S1+S2)≤0.8; when m-n=1, it satisfies: 0.4≤S2/(S1+S2)≤0.8, the main winding can be effectively connected The harmonic content of 210 and the secondary winding 220 is controlled within the optimal range, which effectively improves the motor efficiency.

In some embodiments of the invention, m=5, n=3; or m=5, n=4; or m=4, n=3. That is to say, the main winding 210 of each pole may include 5 layers of coils, and the secondary winding 220 of each pole may include 3 layers of coils, in this case: 0.45≤S2/(S1+S2)≤0.8; or the main winding 210 of each pole may include 5 layers of coils, each pole of the secondary winding 220 includes 4 layers of coils, at this time: 0.4≤S2/(S1+S2)≤0.8; or each pole of the main winding 210 includes 4 layers of coils, each pole of the secondary winding 220 includes 3 layers of coils , at this time: 0.4≤S2/(S1+S2)≤0.8. Through experimental verification, by setting the number of coil layers of the main winding 210 and the secondary winding 220 and the ratio of the secondary winding 220 in the common slot, the third harmonic content of the main winding 210 and the secondary winding 220 can be effectively reduced, and the motor efficiency can be improved.

According to some embodiments of the present invention, it satisfies: 0.55≤S2/(S1+S2)≤0.8. It has been verified by experiments that when: 0.55≤S2/(S1+S2)≤0.8, the utilization rate of copper wire can be improved, and the harmonic content of the main winding 210 and the secondary winding 220 can be controlled within a better range, which improves the motor performance. Efficiency and price/performance ratio of the motor.

In some embodiments of the present invention, the third harmonic content of the secondary winding 220 is Hn3, which satisfies: 5%≤|Hn3|≤15%, wherein Hn3=Y3/(Y1×3), and Y3 is the corresponding third harmonic The total effective turns of , Y1 is the total effective turns 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, and the number of stator teeth 120 included between the two winding slots 130 corresponding to each layer of coils is from The outermost to innermost sides of the n-layer coils are Ya1, Ya2, ..., Yan in sequence, where Q/2>Ya1>Ya2>...>Yan, and Q is the total number of winding slots 130 . According to the number of stator teeth 120 contained between the two winding slots 130 corresponding to the coils of each pole, the n-layer coils of each pole are sequentially referred to as the first coil a1 of the secondary winding 220 and the secondary winding from the outermost to the innermost. 220 The second coil a2, ..., the secondary winding 220 is the nth coil an.

该三次谐波对应的总有效匝数为：Y3＝(X31×A1+X32×A2+…X3n×An)。基波的有效匝数因子为：

基波产生的总计有效匝数为Y1＝(X11×A1+X12×A2+…+X1n×An)，副绕组220的三次谐波含量Hn3＝Y3/(Y1×3)。The number of turns included in the n-layer coils of the secondary winding 220 is from the first coil a1 of the secondary winding 220 to the nth coil an of the secondary winding 220 , which are A1 , A2 , . The effective turns factors of the third harmonics generated by the action of each layer of coils of the secondary winding 220 of each pole are respectively X31, X32, . . . X3n, where

The total effective number of turns corresponding to the third harmonic is: Y3=(X31×A1+X32×A2+…X3n×An). The effective turns factor for 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 of the secondary winding 220 is Hn3=Y3/(Y1×3).

As shown in FIG. 1 and FIG. 2 , the total number Q of winding slots 130 is 24, and the secondary winding 220 of each pole includes three layers of coils, which are the first coil a1 of the secondary winding 220 , the second coil a2 of the secondary winding 220 , and the first coil of the secondary winding 220 . For the three coils a3, the number of stator teeth 120 between the two winding slots 130 corresponding to the coils of the secondary windings 220 in each layer is Y1=11, Y2=9, and Y3=7 in sequence. The number of turns corresponding to the 220 coils of each layer of secondary windings is A1=35, A2=25, and A3=22. Then the effective turns 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 turns factor of the third harmonic generated by the third coil a3 of the secondary winding 220 is:

The total effective number of turns Y3=(X31×A1+X32×A2+X33×A3)=(−0.9239)×35+(−0.3827)×25+0.3827×22=−33.5 generated by the third harmonic.

The effective turns factor for the fundamental wave is:

The total effective number of turns of the fundamental wave Y1=(X11×A1+X12×A2+X13×A3)=(0.9914)×35+(0.9239)×25+0.7934×22=75.3. It can be calculated that |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, the wire diameter of the winding is 1.0 mm, and the wire diameter of the secondary winding 220 is 1.0. The sum S2 of the copper wire cross-sectional area of the secondary winding 220 of the a3 layer with the smallest span is 17.28mm ² , the sum S1 of the copper wire cross-sectional area of the main winding 210 is 18.85mm ² , and the common slot of the secondary winding 220 with the smallest span is 18.85mm 2 . The proportion of the middle secondary winding 220 is S2/(S1+S2)=47.8%.

In the related art, the number of turns corresponding to each layer of the 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 corresponding to each secondary winding is A1=46, A2=22, A3=12, and the wire diameter of the secondary winding is 1.025. Calculated, in the common slot with the smallest secondary winding span, the sum of the copper wire cross-sectional area of the main winding is: S1=M4×3.14159×(1/2) ² =23.56mm ² ; the secondary winding 220 copper wire cross-sectional area The sum is: S2=A3×3.14159×(1.025/2) ² =12×3.14159×(1.025/2)×(1.025/2)=9.9mm ² .

Then the proportion of the secondary winding 220 is S2/(S1+S2)=29.6%. In addition, it can be calculated that the third harmonic content of the secondary winding is: |Hn3|=|Y3/(Y1×3)|=|-46.3 /(75.5×3)|=20.4%.

It can be seen that, 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 wire is reduced by about 4 grams, thereby improving the motor efficiency and the motor cost performance.

According to some embodiments of the present invention, the number of coil layers of the main winding 210 per pole is m, and the number of coil layers of the secondary winding 220 of each pole is n, when m−n=2, it satisfies: 10%≤|Hn3|≤15%. That is to say, when the number of layers of the main winding 210 per pole is two more than the number of layers of the secondary winding 220 of each pole, the third harmonic content of the control secondary winding 220 satisfies: 10%≤|Hn3|≤15%. It is verified that when the above range setting is satisfied, the third harmonic content of the main winding 210 and the secondary winding 220 can be effectively controlled, and the performance of the motor can be improved.

When m-n=1, it satisfies: 5%≤|Hn3|≤10%. That is to say, when the number of layers of the main winding 210 per pole is one more layer than the number of layers of the secondary windings 220 per pole, the third harmonic content of the control secondary winding 220 satisfies: 5%≤|Hn3|≤10%, which is verified by experiments , when the above range setting is satisfied, the third harmonic content of the main winding 210 and the secondary winding 220 can be effectively controlled, and the performance of the motor can be improved.

In some embodiments of the invention, m=5, n=3; or m=5, n=4; or m=4, n=3. That is to say, the number of coil layers of the main winding 210 of each pole can be 5 layers, and the number of coil layers of the secondary winding 220 of each pole can be 3 layers. At this time, the content of the third harmonic is controlled to satisfy: 10%≤|Hn3|≤15% ; The number of coil layers of the main winding 210 of each pole can also be 5 layers, and the number of coil layers of the secondary winding 220 of each pole can be 4 layers. At this time, the content of the third harmonic is controlled to satisfy: 5%≤|Hn3|≤10%; of course It is also possible that the number of coil layers of the main winding 210 of each pole is 4 layers, and the number of coil layers of the secondary winding 220 of each pole is 3 layers. At this time, the content of the third harmonic is controlled to satisfy: 5%≤|Hn3|≤10%.

According to some embodiments of the present invention, the outer diameter of the stator core 10 is D, which satisfies: 121mm<D<140mm. It has been verified by experiments that when the outer diameter D of the iron core of the stator satisfies: 121mm<D<140mm, and the secondary winding 220 with the smallest span and the main winding 210 are set together in the same winding slot 130, in the same winding slot 130 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 secondary winding 220 is S2, which satisfies: 0.4≤S2/(S1+S2)≤0.8. Therefore, the proportion of the main winding 210 and the auxiliary winding 220 in the common slot can be made reasonable, and the third harmonic content of the main winding 210 and the auxiliary winding 220 can be effectively controlled, thereby improving the performance of the motor.

According to the motor of the embodiment of the present invention, the motor includes: a rotor and a stator part 100, the stator part 100 is the above-mentioned stator part 100, the rotor is set in the stator hole 110, and the rotor is rotatable relative to the stator.

In the motor according to the embodiment of the present invention, the secondary winding 220 with the smallest span of the stator component 100 and the main winding 210 are located in the same winding slot 130, and the secondary winding 220 and the main winding 210 in the same winding slot 130 are arranged in the same winding slot 130. If the ratio satisfies 0.4≤S2/(S1+S2)≤0.8, 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 of the embodiment of the present invention, the compressor includes the above-mentioned motor.

According to the compressor of the embodiment of the present invention, the proportion of the main winding 210 and the secondary winding 220 in the common slot of the motor stator is reasonable, the third harmonic content of the secondary winding 220 is effectively reduced, and the amount of copper wire of the motor is reduced. The production cost of the compressor improves the cost performance of the compressor.

The stator component 100 according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2 in a specific embodiment. It should be understood that the following description is only an exemplary description, rather than a specific limitation of the present invention.

As shown in FIGS. 1 and 2 , the stator component 100 includes a stator core 10 and a stator winding 20 .

The outer diameter of the stator core 10 is D, which satisfies: 121 mm<D<140 mm. The stator core 10 has a stator hole 110 penetrating in the axial direction, a plurality of stator teeth 120 are arranged at intervals along the 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 secondary winding 220 , and the main winding 210 and the secondary winding 220 are wound on the stator teeth 120 through the winding slot 130 . The main winding 210 is connected to the power supply, and the secondary winding 220 is connected to the capacitor in parallel with the main winding 210 . Among them, as shown in FIG. 2 , each pole 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 coil 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 1.0mm. The secondary winding 220 of each pole includes three layers of coils, which are: a1 layer, a2 layer, and a3 layer respectively from outside to inside. The number of turns of the secondary winding 220 in each layer is A1=35, A2=25, A3=22, and the wire diameter of the secondary winding 220 is 1.0.

The number of stator teeth 120 between the two winding slots 130 corresponding to the a1 layer is 11, the number of stator teeth 120 between the two winding slots 130 corresponding to the a2 layer is 9, and the two winding slots 130 corresponding to the a3 layer The number of stator teeth 120 in between is seven.

The secondary winding 220 of the a3 layer with the smallest span is arranged in the same winding slot 130 together with the main winding 210 (the winding slot 130 numbered 21, 4, 9 and 16), and the calculation can be obtained in the number 21, 4, 9 The sum of the cross-sectional area of the copper wire of the secondary winding 220 in the winding slot 130 of and 16 is 17.28mm ² , the sum of the cross-sectional area of the copper wire of the main winding 210 is 18.85mm ² , and the proportion of the secondary winding 220 in the total slot is S2/(S1 +S2)=47.8%. The third harmonic content of the secondary winding 220 can be obtained by calculation |Hn3|=|Y3/(Y1×3)|=14.8%.

Therefore, by setting the secondary winding 220 with the smallest span and the main winding 210 in the same winding slot 130, the ratio of the secondary winding 220 and the main winding 210 in the same winding slot 130 satisfies 0.4≤S2/(S1 +S2)≤0.8, the proportion of the secondary windings 220 in the common slot can be increased, which is beneficial to reduce the third harmonic content of the secondary windings 220, thereby improving the motor efficiency. Moreover, the amount of copper wire is reduced, the utilization rate of copper wire is improved, and the cost performance of the motor is improved.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms 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.

Although embodiments of the present 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 in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. A stator component is characterized in that, comprises: A stator iron core, the stator iron core has a stator hole passing through in the axial direction, a plurality of stator teeth are arranged at intervals along the circumferential direction of the stator hole, and a winding is defined between any two adjacent stator teeth groove; a stator winding, 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, Wherein, the secondary winding with the smallest span and the main winding are jointly arranged in the same winding slot, and the sum of the cross-sectional areas of the 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, which satisfies: 0.4≤S2/(S1+S2)≤0.8. 2. The stator component according to claim 1, wherein the number of coil layers of the main winding per pole is m, the number of coil layers of the secondary winding per pole is n, When m-n=2, satisfy: 0.45≤S2/(S1+S2)≤0.8; When m-n=1, it satisfies: 0.4≤S2/(S1+S2)≤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 according to claim 1 , wherein: 0.55≦S2/(S1+S2)≦0.8 is satisfied. 5 . 5 . The stator component according to claim 1 , wherein the third harmonic content of the secondary winding is Hn3 , which satisfies: 5%≤|Hn3|≤15%, wherein, Hn3=Y3/(Y1×3 ), Y3 is the total effective number of turns corresponding to the third harmonic, and Y1 is the total effective number of turns corresponding to the fundamental wave. 6. The stator component according to claim 5, wherein the number of coil layers of the main winding per pole is m, the number of coil layers of the secondary winding per pole is n, When m-n=2, it satisfies: 10%≤|Hn3|≤15%; When m-n=1, it satisfies: 5%≤|Hn3|≤10%. 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 according to claim 1 , wherein the outer diameter of the stator iron core is D, which satisfies: 121mm<D<140mm. 9 . 9. A motor, characterized in that the motor comprises: rotor; A stator part, the stator part is the stator part according to any one of claims 1-8, the rotor is provided in the stator hole and the rotor is rotatable relative to the stator. 10. A compressor, characterized in that, comprising: The motor is the motor according to claim 9 .

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