Stator core, motor and manufacturing method of stator core

Abstract

The invention discloses a stator iron core, a motor and a manufacturing method of the stator iron core, and relates to the technical field of motors, the stator iron core comprises a first iron core element and a second iron core element, and the first iron core element is provided with a yoke part. In the stator yoke of the stator core, the thickness of the first iron core element and the thickness of the second iron core element can be set to be narrow, so that in the process of forming the first iron core element of the spiral structure and / or the second iron core element of the spiral structure in a winding mode, the situations of tearing and protruding do not occur easily. In addition, the thickness of the stator yoke in the stator iron core is increased by additionally arranging the second iron core element, and therefore the stator iron core can be conveniently applied to a motor with a small number of poles.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and in particular to a stator core, an electric motor, and a method for manufacturing the stator core. Background Technology

[0002] With the booming development of the new energy vehicle industry, the requirements for motors are becoming increasingly stringent, demanding both improved performance and reduced manufacturing costs. To address these needs, current technologies include installing a stator core manufactured through a winding process within the motor to enhance efficiency. Furthermore, the winding process increases the utilization rate of the stator core material, further reducing manufacturing costs.

[0003] However, due to the limited ductility of the thin silicon steel strip used to manufacture stator cores, the yoke thickness of existing wound stator cores cannot be made too thick, limiting their application to motors with a large number of poles, or motors with a large number of magnetic poles or windings. If the yoke of the existing wound stator core is thickened during winding, tearing on the outer side and bulging on the inner side of the thin silicon steel strip are likely to occur during the winding process. Summary of the Invention

[0004] The main objective of this invention is to propose a stator core, a motor, and a method for manufacturing the stator core, aiming to solve the problem that existing stator cores with thicker yokes are prone to tearing and bulging during winding.

[0005] To achieve the above objectives, the stator core proposed in this invention comprises:

[0006] A first core element, the first core element having a yoke; and

[0007] The second core element is independent of the first core element. The first core element and / or the second core element are spiral structures. The second core element is located on the outer periphery of the first core element and is fixed to the yoke to form a stator yoke.

[0008] In one embodiment, the stator core further includes a filler material that fills the space between the yoke and the second core element, so that the second core element is fixed to the yoke and forms a stator yoke.

[0009] In one embodiment, the filler material is a resin material.

[0010] In one embodiment, the first core element has a plurality of stator teeth, and adjacent stator teeth form stator slots with the yoke.

[0011] In one embodiment, the stator core further includes stator teeth that cooperate with the first core element, and adjacent stator teeth form stator slots with the yoke.

[0012] In one embodiment, the difference between the outer radius and the inner radius of the stator yoke is the thickness of the stator yoke, and the thickness of the stator yoke is greater than or equal to 10 mm.

[0013] The present invention also proposes an electric motor, including a housing and a stator core, wherein the housing is connected to the stator core, and the housing has a liquid inlet and a liquid outlet.

[0014] In one embodiment, the second core element is provided with a cooling channel, which is connected to the liquid inlet and the liquid outlet.

[0015] In one embodiment, a cooling groove is provided on the outer periphery of the second iron core element, the housing is connected to the second iron core element, the cooling groove forms a cooling channel, and the cooling channel is connected to the liquid inlet and the liquid outlet.

[0016] The present invention also proposes a method for manufacturing a stator core, the method comprising the following steps:

[0017] A first winding unit is provided, the first winding unit including a yoke and a plurality of stator teeth spaced apart on the yoke;

[0018] Provide a second core component;

[0019] The first roll unit is wound to form a first iron core element, and the second iron core element is located on the outer periphery of the first iron core element;

[0020] The second core element is fixed to the yoke of the first core element.

[0021] The present invention also proposes a method for manufacturing a stator core, the method comprising the following steps:

[0022] A first core element is provided, the first core element including a yoke and a plurality of stator teeth spaced apart on the yoke;

[0023] Provide a second roll unit;

[0024] The second roll unit is wound to form a second core element, and the second core element is located on the outer periphery of the first core element;

[0025] The second core element is fixed to the yoke of the first core element.

[0026] The present invention also proposes a method for manufacturing a stator core, the method comprising the following steps:

[0027] A first winding unit is provided, the first winding unit including a yoke and a plurality of stator teeth spaced apart on the yoke;

[0028] Provide a second roll unit;

[0029] The first and second winding units are wound synchronously to form a first core element and a second core element, respectively, with the second core element located on the outer periphery of the first core element.

[0030] The technical solution of this invention adds a second core element, which is independent of the first core element. The first and / or second core elements have a helical structure, with the second core element located on the outer periphery of the first core element. The second core element is fixed to the yoke of the first core element to form a stator yoke. In the stator yoke of the stator core of this invention, since the thickness of both the first and second core elements can be set to be relatively narrow, tearing and bulging are less likely to occur during the process of forming the helical structure of the first and / or second core elements by winding. Furthermore, by adding a second core element to increase the thickness of the stator yoke in the stator core, this invention facilitates the application of the stator core of this invention to motors with a smaller number of poles. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of the stator core provided by the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of an embodiment of the first roll unit provided by the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of an embodiment of the second roll unit provided by the present invention;

[0035] Figure 4 This is a schematic diagram of another embodiment of the second roll unit provided by the present invention;

[0036] Figure 5 This is a schematic diagram of another embodiment of the second roll unit provided by the present invention.

[0037] Explanation of icon numbers:

[0038] 100. Stator core;

[0039] 11. First core element; 110. First lamination unit; 111. Yoke; 112. Stator teeth;

[0040] 12. Second core element; 120. Second winding unit; 121. Cooling channel; 122. Cooling tank;

[0041] 13. Filler.

[0042] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0046] With the booming development of the new energy vehicle industry, the requirements for motors are becoming increasingly stringent, demanding both improved performance and reduced manufacturing costs. To address these needs, current technologies employ a stator core 100 manufactured using a winding process within the motor to enhance efficiency. Furthermore, the winding process increases the utilization rate of the core material, further reducing motor manufacturing costs.

[0047] However, due to the limited ductility of the thin silicon steel strip used to manufacture the stator core 100, the thickness of the yoke 111 of the existing wound stator core 100 cannot be made too thick, limiting its application to motors with a large number of poles. If the yoke 111 of the existing wound stator core 100 is thickened during winding, the thin silicon steel strip is prone to tearing on the outside and bulging on the inside during the winding process.

[0048] Understandably, the thin silicon steel strip used to make the stator core 100 is narrow. During the winding process, the inner side of the stator core 100 formed by winding the thin silicon steel strip is easily squeezed and bulges appear; while the outer side of the stator core 100 formed by winding the thin silicon steel strip is easily stretched, which can easily lead to tearing.

[0049] To avoid tearing or bulging of the stator core due to relative movement between the inner and outer sides, which would result in product defects, this invention proposes a stator core 100. Please refer to... Figures 1 to 3 In one embodiment of the present invention, the stator core 100 proposed in the present invention includes:

[0050] First core element 11, the first core element 11 having a yoke 111; and

[0051] The second core element 12 is independent of the first core element 11. The first core element 11 and / or the second core element 12 have a spiral structure. The second core element 12 is located on the outer periphery of the first core element 11. The second core element 12 is fixed to the yoke 111 to form a stator yoke.

[0052] Understandably, the first core element 11 and the second core element 12 can have three structural forms, namely:

[0053] The first type: the first core element 11 and the second core element 12 are spiral structures.

[0054] The second type: the first core element 11 has a spiral structure, and the second core element 12 has other structures.

[0055] The third type: the first core element 11 has other structures, and the second core element 12 has a spiral structure.

[0056] In the first type, the first core element 11 and the second core element 12 have a helical structure. Specifically, the first core element 11 is formed by winding through a first winding unit 110, and the second core element 12 is formed by winding through a second winding unit 120. Both the first core element 11 and the second core element 12 have a helical structure. Then, the helical first core element 11 is placed inside the helical second core element 12, and the first core element 11 and the second core element 12 are fixed together by welding, adhesive 13, or other methods, so that the second core element 12 is fixed to the yoke 111 of the first core element 11 and forms a stator yoke.

[0057] Understandably, existing technologies can set the stator core thickness to 10mm or more. These technologies use thin silicon steel strips with a width of 10mm or more for winding. However, excessively wide thin silicon steel strips are prone to tearing on the outside and bulging on the inside during winding. In contrast, this invention also sets the stator core 100 thickness to 10mm or more. This invention can use a first winding unit 110 and a second winding unit 120, both with widths less than 10mm, for winding to form a first core element 11 and a second core element 12, respectively. The thickness of both the first core element 11 and the second core element 12 is less than 10mm. Since the thickness of the first winding unit 110 and the thickness of the second winding unit 120 are both relatively narrow, the winding operation is not only easy to implement, but also the first winding unit 110, which is closer to the inside, is not easily deformed or bulged when squeezed, and the second winding unit 120, which is closer to the outside, is not easily torn when stretched. This ensures that the first iron core element 11 formed by winding the first winding unit 110 and the second iron core element 12 formed by winding the second winding unit 120 are not easily torn or bulged.

[0058] The second type: The first core element 11 has a spiral structure, and the second core element 12 has other structures, such as a cylindrical structure. Specifically, the first core element 11 can be formed by winding the first winding unit 110, thus making the first core element 11 a spiral structure; the second core element 12 can be formed by directly stamping the shape of the second core element 12 using a mold, thus making the second core element 12 a cylindrical structure. Then, the spiral structure of the first core element 11 is placed inside the cylindrical structure of the second core element 12, and then the first core element 11 and the second core element 12 are fixed together by welding, adhesive 13, etc., so that the second core element 12 is fixed to the yoke 111 of the first core element 11 and forms a stator yoke.

[0059] Understandably, the present invention sets the thickness of the stator core 100 to 10mm or more. The present invention can use a first winding unit 110 with a width less than 10mm for winding. The first core element 11 formed by winding is placed inside a second core element 12 formed by stamping. The second core element 12 is fixed to the yoke 111 of the first core element 11 to form a stator yoke. Because the first winding unit 110 is less than 10mm, it ensures that the first core element 11 formed by winding the first winding unit 110 is less prone to tearing or bulging.

[0060] The third type: The first core element 11 has other structures, such as the second core element 12 being a cylindrical structure or a spiral structure. Specifically, the first core element 11 is directly stamped out of its shape using a mold, resulting in a cylindrical structure; the second core element 12 is formed by winding it using the second winding unit 120, thus making it a spiral structure. Then, the cylindrical first core element 11 is placed inside the spiral second core element 12, and the first and second core elements 11 are fixed together by welding, adhesive 13, or other methods, so that the second core element 12 is fixed to the yoke 111 of the first core element 11, forming a stator yoke.

[0061] Understandably, the present invention sets the thickness of the stator core 100 to 10mm or more. The present invention can use a second winding unit 120 with a width less than 10mm for winding. A stamped core element 11 is placed inside the wound second core element 12, so that the second core element 12 is fixed to the yoke 111 of the first core element 11 to form a stator yoke. Because the second winding unit 120 is less than 10mm, it ensures that the second core element 12 formed by the second winding unit 120 is less prone to tearing or bulging.

[0062] Since the first core element 11 and / or the second core element 12 are made by winding, the utilization rate of the first winding unit 110 and / or the second winding unit 120 can be effectively improved, thereby reducing the manufacturing cost of the motor.

[0063] The technical solution of this invention adds a second core element 12, which is independent of the first core element 11. The first core element 11 and / or the second core element 12 have a helical structure. The second core element 12 is located on the outer periphery of the first core element 11, and is fixed to the yoke 111 of the first core element 11 to form a stator yoke. In the stator yoke of the stator core of this invention, since the thickness of both the first and second core elements can be set to be relatively narrow, tearing and bulging are less likely to occur during the process of forming the helical first core element and / or helical second core element by winding. Furthermore, by adding a second core element to increase the thickness of the stator yoke in the stator core, this invention facilitates the application of the stator core of this invention to motors with a small number of poles. Furthermore, it is understood that, based on the fact that the first core element 11 is relatively thin and is not easily torn or bulging, the present invention can increase the thickness of the stator yoke in the stator core 100 by adding a second core element 12, thereby facilitating the application of the stator core 100 of the present invention to motors with fewer poles.

[0064] In one embodiment, the stator core 100 further includes a filler 13, which is filled between the yoke 111 and the second core element 12 to fix the second core element 12 to the yoke 111 of the first core element 11 and form a stator yoke.

[0065] A filler 13 is filled between the yoke 111 of the first core and the second core element 12. After curing, the filler 13 can fix the first core element 11 and the second core element 12, and space them apart. This reduces the risk of eddy currents forming between the first core element 11 and the second core element 12, leading to high stator core 100 losses and decreased motor performance. Furthermore, after curing, the filler 13 can fix the first core element 11 and the second core element 12, and it also creates frictional resistance between them, preventing relative movement and eliminating the risk of slippage between the first core element 11 and the second core element 12.

[0066] The filler 13 can be an adhesive to bond the second core element 12 to the yoke 111 of the first core element 11. The filler 13 can also be a solid adhesive. The operation of bonding the solid adhesive between the first core element 11 and the second core element 12 is very simple and quick, which greatly saves the time of manufacturing the stator core 100.

[0067] Furthermore, the filler 13 is made of resin.

[0068] Because epoxy resin and phenolic resin have the advantages of strong adhesion and good thermal conductivity, the filler 13 of the present invention can be made of epoxy resin or phenolic resin to bond and fix the first core element 11 and the second core element 12, thereby increasing the thickness of the stator yoke of the stator core 100. Furthermore, the filler 13 made of epoxy resin or phenolic resin is filled in the gap between the first core element 11 and the second core element 12, which can separate the first core element 11 and the second core element 12, thereby reducing the occurrence of eddy currents formed by the phase conduction between the first core element 11 and the second core element 12, leading to high stator core 100 losses and decreased motor performance.

[0069] The first core element 11 has multiple stator teeth 112, and stator slots are formed between adjacent stator teeth 112 and the yoke 111.

[0070] In one embodiment, a plurality of stator teeth 112 can be directly formed on the first core element 11 by stamping, and stator slots are formed between adjacent stator teeth 112 and yoke 111.

[0071] Alternatively, the first core element 11 can be formed by winding a first coiling unit 110. Specifically, a first coiling unit 110 is selected and placed into a stamping device to form a stator slot, which includes stator teeth 112 and a yoke 111. Then, the first coiling unit 110 with the stator slot is wound, and the first core element 11 is formed after the winding operation.

[0072] In this embodiment, a plurality of stator teeth 112 on the first core element 11 are disposed on the yoke 111, and the filler 13 can be applied to the side of the yoke 111 of the first core element 11 that is away from the plurality of stator teeth 112, so as to fix the yoke 111 of the first core element 11 to the second core element 12.

[0073] If the second core element 12 is formed by winding through the second winding unit 120, and the second core element 12 has a spiral structure and a circular cross-section, then the second core element 12 can be bonded and fixed to the yoke 111 of the first core element 11 by the filler 13 to form a stator yoke.

[0074] In order to ensure that the thickness of the stator yoke of the stator core 100 can be increased, the second core element 12 is provided on the side of the yoke 111 opposite to the plurality of stator teeth 112.

[0075] In another embodiment, the stator core further includes stator teeth that engage with the first core element, and stator slots are formed between adjacent stator teeth 112 and yoke 111.

[0076] Specifically, a third core element can be used separately. The third core element has stator teeth 112 formed on it. The third core element with stator teeth 112 is connected to the first core element by welding, filling with filler, or other methods, so that stator slots are formed between adjacent stator teeth 112 on the third core element and the yoke 111 on the first core element. The third core element can be formed directly by stamping.

[0077] The third core element can also be formed by winding. Specifically, a third coil unit is selected and placed into a stamping device to form a stator slot shape, which includes stator teeth 112 and a yoke 111. Then, the third coil unit with the stator slot shape is wound to form the third core element.

[0078] Because excessively thick thin silicon steel strips are prone to tearing on the outside and bulging on the inside during the winding process, the thickness of the yoke 111 of the existing stator core 100 is mostly limited to 4mm or less.

[0079] In contrast, the stator yoke of the stator core 100 of the present invention is formed by fixing a first core element 11 and a second core element 12 together. In one embodiment, the difference between the outer radius and the inner radius of the stator yoke is the thickness of the stator yoke, and the thickness of the stator yoke is greater than or equal to 10 mm. The thickness of the stator yoke of the stator core 100 can reach 10 mm, thereby enabling the stator core 100 of the present invention to be applied to motors with a small number of poles. The first core element 11 of the stator core 100 of the present invention can ensure that, based on the original thickness, tearing and bulging are not likely to occur, thereby ensuring the high yield of the stator core 100 and reducing the occurrence of defective products.

[0080] The first core element 11 of the present invention maintains its original thickness, for example, by keeping the thickness of the first core element 11 at or below 4 mm, making it less prone to tearing and bulging. Then, by adding a second core element 12, the second core element 12 is made independent of the first core element 11. The first core element 11 and / or the second core element 12 have a helical structure. The second core element 12 is located on the outer periphery of the first core element 11, and is fixed to the yoke 111 of the first core element 11 to form a stator yoke, such that the thickness of the stator yoke of the stator core of the present invention is greater than or equal to 10 mm. The difference between the outer radius and the inner radius of the stator yoke of the present invention is the thickness of the stator yoke. Therefore, the stator core 100 of the present invention can be made to increase the thickness of the stator yoke by adding a second core element 12, while keeping the thickness of the first core element 11 unchanged and ensuring that it is not easily torn or bulging. This makes it easier to apply the stator core 100 of the present invention to motors with fewer poles.

[0081] The present invention also proposes an electric motor, which includes a housing and a stator core 100. The specific structure of the stator core 100 is as described in the above embodiments. Since this electric motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The stator core 100 is disposed in the housing. The stator core 100 includes a first core element 11 and a second core element 12. The first core element 11 has a yoke 111. The second core element 12 is independent of the first core element 11. The second core element 12 and / or the first core element 11 have a helical structure. The second core element 12 is located on the outer periphery of the first core element 11 and is fixed to the yoke 111 to form a stator yoke.

[0082] Since the stator yoke of the stator core 100 of the present invention is formed by fixing the first core element 11 and the second core element 12 together, the stator yoke thickness of the stator core 100 of the motor of the present invention can reach 10mm, which makes it easier to set the number of magnetic poles or windings of the motor of the present invention to be less, so as to increase the speed of the motor and improve the performance of the motor.

[0083] Furthermore, the housing is connected to the stator core 100, and the housing has a liquid inlet and a liquid outlet. Specifically, the housing can be connected to the stator core 100 by an interference fit. The housing has a liquid inlet and a liquid outlet, and coolant can enter from the liquid inlet, flow around the stator core 100, and then flow out from the liquid outlet to carry away the heat of the stator core 100.

[0084] In another embodiment, in order to dissipate heat from the primary iron core 100, such as... Figure 4As shown, the second core element 12 is provided with a cooling channel 121, which is connected to the liquid inlet and the liquid outlet.

[0085] The cooling channel 121 can be located inside the second core element 12, rather than on the outer or inner circumferential surface of the second core element 12, and the cooling channel 121 is connected to the liquid inlet and liquid outlet on the housing. Coolant can enter from the liquid inlet, flow through the cooling channel 121 located inside the second core element 12, and then flow out from the liquid outlet to carry away the heat of the stator core 100.

[0086] In yet another embodiment, such as Figure 5 As shown, a cooling groove 122 is provided on the outer periphery of the second iron core element 12. The housing is connected to the second iron core element 12, and the cooling groove 122 forms a cooling channel. The cooling channel is connected to the liquid inlet and the liquid outlet.

[0087] A second core element 12 with a cooling groove is installed inside the housing. The housing encloses the cooling groove 122 of the second core element 12, so that the semi-enclosed cooling groove 122 of the second core element 12 is enclosed to form a cooling channel. The cooling channel is connected to the liquid inlet and liquid outlet on the housing. Coolant can enter from the liquid inlet, flow through the cooling channel, and then flow out from the liquid outlet, thereby carrying away the heat of the stator core 100.

[0088] The present invention also proposes a method for manufacturing a stator core 100, the method comprising the following steps:

[0089] A first winding unit 110 is provided, the first winding unit 110 includes a yoke 111 and a plurality of stator teeth 112 spaced apart on the yoke 111;

[0090] Provide a second core element 12;

[0091] The first winding unit 110 is wound to form a first iron core element 11, and the second iron core element 12 is located on the outer periphery of the first iron core element 11.

[0092] The second core element 12 is fixed to the yoke 111 of the first core element 11.

[0093] The first core element 11 is formed by winding the first coil unit 110, and the second core element 12 can be directly formed into a cylindrical structure by stamping. The first core element 11 is placed inside the second core element 12.

[0094] The first core element 11 and the second core element 12 can then be fixed by welding. Alternatively, filler 13 can be filled between the first core element 11 and the second core element 12 to bond and fix them together.

[0095] Specifically, the process of winding the first coil unit 110 to form the first iron core element 11 can be as follows: First, according to the selected first coil unit 110, the first coil unit 110 is placed into a stamping device for stamping so that the first coil unit 110 forms a yoke 111 and multiple stator teeth 112. Then, it is placed into a winding device for winding, and after being stacked, the first iron core element 11 is formed.

[0096] The present invention also proposes a method for manufacturing a stator core 100, the method comprising the following steps:

[0097] A first core element 11 is provided, the first core element 11 including a yoke 111 and a plurality of stator teeth 112 spaced apart on the yoke 111;

[0098] Provides a second roll unit 120;

[0099] The second roll unit 120 is wound to form a second iron core element 12, and the second iron core element 12 is located on the outer periphery of the first iron core element 11.

[0100] The second core element 12 is fixed to the yoke 111 of the first core element 11.

[0101] The first core element 11 can be directly stamped into a cylindrical structure; the second core element 12 is formed by winding the first winding unit 110, and the second core element 12 has a spiral structure. The first core element 11 is placed inside the second core element 12.

[0102] The first core element 11 and the second core element 12 can then be fixed by welding. Alternatively, filler 13 can be filled between the first core element 11 and the second core element 12 to bond and fix them together.

[0103] Specifically, the process of winding the second coil unit 120 to form the second core element 12 can be as follows: First, according to the selected second coil unit 120, the first coil unit 110 is placed into the stamping equipment for stamping to press the second coil unit 120 into a long strip shape. Then, the long strip shape of the second coil unit 120 is placed into the winding equipment for winding, and after being stacked, a spiral structure of the second core element 12 is formed.

[0104] The present invention also proposes a method for manufacturing a stator core 100, the method comprising the following steps:

[0105] A first winding unit 110 is provided, the first winding unit 110 includes a yoke 111 and a plurality of stator teeth 112 spaced apart on the yoke 111;

[0106] Provides a second roll unit 120;

[0107] The first winding unit 110 and the second winding unit 120 are wound synchronously to form the first iron core element 11 and the second iron core element 12, respectively, with the second iron core element 12 located on the outer periphery of the first iron core element 11.

[0108] The present invention employs a first winding unit 110 and a second winding unit 120 to simultaneously wind the first iron core element 11 and the second iron core element 12, respectively, resulting in higher winding efficiency and reduced waiting time for winding.

[0109] Specifically, the process of synchronously winding the first winding unit 110 and the second winding unit 120 can be as follows: First, according to the selected first winding unit 110 and second winding unit 120, the first winding unit 110 and the second winding unit 120 are respectively placed into two stamping machines for stamping, so that the first winding unit 110 forms a yoke 111 and multiple stator teeth 112, and the second winding unit 120 is stamped into an elongated second winding unit; then, the stamped first winding unit 110 and the stamped elongated second winding unit are respectively placed into two winding machines for synchronous winding, and after synchronous stacking, a first iron core element 11 and a second iron core element 12 are formed respectively. Then, the second iron core element 12 is fixed to the outer periphery of the first iron core element 11. Finally, the first iron core element 11 and the second iron core element 12 can be fixed by welding, filling with filler, or other methods.

[0110] Furthermore, while the first roll unit 110 and the second roll unit 120 are wound synchronously, the softened filler 13 can be filled between the first roll unit 110 and the second roll unit 120.

[0111] The solidified filler 13 is used to fix the first core element 11 and the second core element 12.

[0112] Alternatively, after the step of simultaneously winding the first winding unit 110 and the second winding unit 120 to form the first core element 11 and the second core element 12 respectively, wherein the second core element 12 is located on the outer periphery of the first core element 11, the method further includes:

[0113] The softened filler 13 is filled between the first core element 11 and the second core element 12;

[0114] The solidified filler 13 is used to fix the first core element 11 and the second core element 12.

[0115] Understandably, there are two ways to fill the filler 13 into the first core element 11 and the second core element 12:

[0116] The first filling method is: during the synchronous winding of the first roll unit 110 and the second roll unit 120, filler 13 is applied, thereby making the filler 13 adhere to the first roll unit 110 and the second roll unit 120.

[0117] The second filling method is as follows: the first winding unit 110 and the second winding unit 120 are respectively wound to form the first iron core element 11 and the second iron core element 12, and then the filler 13 is applied between the formed first iron core element 11 and the formed second iron core element 12.

[0118] In the first filling method, the specific filling process of filler 13 can be as follows:

[0119] The filler 13 is softened using a mold at a temperature of 150 to 180 degrees Celsius. Pressure may be applied during the softening process. The softened filler 13 is then applied to the gap between the first roll unit 110 and the second roll unit 120. Finally, the filler 13 is cured so that it can bond the first core element 11 and the second core element 12 together.

[0120] In the second filling method, the specific filling process of filler 13 can be as follows:

[0121] The filler 13 is softened using a mold at a temperature of 150 to 180 degrees Celsius. Pressure can be applied during the softening process. The softened filler 13 is then filled into the gap between the first core element 11 and the second core element 12. Finally, the cured filler 13 bonds the first core element 11 to the second core element 12 together.

[0122] Since the filler 13 can fix the first iron core element 11 and the second iron core element 12 after curing, and the filler 13 can space the first iron core element 11 and the second iron core element 12, the situation of the first iron core element 11 and the second iron core element 12 conducting to form eddy currents, resulting in large stator core 100 losses and motor performance degradation is reduced.

[0123] Furthermore, the first core element 11 and the second core element 12 are fixed by the filler 13, making it difficult for the first core element 11 and the second core element 12 to move relative to each other. The filler 13 forms frictional resistance between the first core element 11 and the second core element 12, preventing relative movement between the first core element 11 and the second core element 12, thereby eliminating the risk of slippage of the stator core 100.

[0124] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A stator core, characterized in that, include: A first core element, the first core element having a yoke; and The second core element is independent of the first core element. The first core element and / or the second core element are spiral structures. The second core element is located on the outer periphery of the first core element and is fixed to the yoke to form a stator yoke.

2. The stator core as described in claim 1, characterized in that, The stator core also includes a filler material, which is filled between the yoke and the second core element to fix the second core element to the yoke and form a stator yoke.

3. The stator core as described in claim 2, characterized in that, The filler material is a resin material.

4. The stator core as described in any one of claims 1 to 3, characterized in that, The first core element has multiple stator teeth, and adjacent stator teeth form stator slots with the yoke.

5. The stator core as described in any one of claims 1 to 3, characterized in that, It also includes stator teeth, which cooperate with the first iron core element, and stator slots are formed between adjacent stator teeth and the yoke.

6. The stator core as described in any one of claims 1 to 3, characterized in that, The difference between the outer radius and the inner radius of the stator yoke is the thickness of the stator yoke, and the thickness of the stator yoke is greater than or equal to 10 mm.

7. An electric motor, characterized in that, It includes a housing and a stator core as described in any one of claims 1 to 6, the housing being connected to the stator core, and the housing having a liquid inlet and a liquid outlet.

8. The motor as described in claim 7, characterized in that, The second iron core element is provided with a cooling channel, which is connected to the liquid inlet and the liquid outlet.

9. The motor as described in claim 7, characterized in that, The outer periphery of the second iron core element is provided with a cooling groove, the housing is connected to the second iron core element, the cooling groove forms a cooling channel, and the cooling channel is connected to the liquid inlet and the liquid outlet.

10. A method for manufacturing a stator core, characterized in that, The method for manufacturing the stator core includes the following steps: A first winding unit is provided, the first winding unit including a yoke and a plurality of stator teeth spaced apart on the yoke; Provide a second core component; The first roll unit is wound to form a first iron core element, and the second iron core element is located on the outer periphery of the first iron core element; The second core element is fixed to the yoke of the first core element.

11. A method for manufacturing a stator core, characterized in that, The method for manufacturing the stator core includes the following steps: A first core element is provided, the first core element including a yoke and a plurality of stator teeth spaced apart on the yoke; Provide a second roll unit; The second roll unit is wound to form a second core element, and the second core element is located on the outer periphery of the first core element; The second core element is fixed to the yoke of the first core element.

12. A method for manufacturing a stator core, characterized in that, The method for manufacturing the stator core includes the following steps: A first winding unit is provided, the first winding unit including a yoke and a plurality of stator teeth spaced apart on the yoke; Provide a second roll unit; The first and second winding units are wound synchronously to form a first core element and a second core element, respectively, with the second core element located on the outer periphery of the first core element.

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