Stator core, stator and motor

Abstract

The embodiment of the utility model relates to the technical field of stators, and particularly discloses a stator iron core, a stator and a motor, the stator iron core comprises an iron core body and a plurality of second yoke parts, the iron core body is provided with a plurality of stator teeth, a plurality of first yoke parts, a plurality of pole shoes, a plurality of magnetic isolation bridges, a plurality of winding grooves and a plurality of openings, the plurality of stator teeth are arranged at intervals in a surrounding manner, one first yoke part is fixed on one side of the stator tooth, one pole shoe is fixed on the other side of the stator tooth, one magnetic isolation bridge is fixed with two adjacent pole shoes, the winding groove is communicated with the opening, one opening is located between two adjacent first yoke parts, and the other opening is located between two adjacent second yoke parts. The openings are used for conveniently winding by using winding equipment, and one second yoke part is mounted in one opening. In this way, automatic winding is achieved, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of stator technology, and in particular to a stator core, stator, and motor. Background Technology

[0002] The rotor of an electric motor is located inside or outside the stator; in other words, the stator is either wrapped around or inside the rotor. In the stator manufacturing process, where the stator is wrapped around the rotor, a multi-strand winding technique is used to wind the stator windings onto the stator core.

[0003] However, in the process of implementing the embodiments of this application, the inventors discovered that: currently, the stator core is provided with multiple stator teeth, a yoke and multiple pole shoes. The multiple stator teeth are arranged in a circumferential manner within the yoke. One side of the stator teeth is fixed to the yoke, and the other side of one stator tooth is fixed to one pole shoe. Two adjacent pole shoes define a slot. In order to meet the performance requirements of the motor, the size of the slot is small. As a result, during the stator production process, a winding technique of manually winding multiple strands of wire is used to wind the wire onto the stator core, which leads to low production efficiency and high production costs.

[0004] Application content

[0005] The main technical problem addressed by this application is to provide a stator core, stator, and motor, which aims to solve the problem of low production efficiency and high production costs caused by the manual winding technique of winding multiple strands together to wind the stator core during the stator production process.

[0006] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing a stator core, including a core body and a plurality of second yokes, wherein the core body is provided with a plurality of stator teeth, a plurality of first yokes, a plurality of pole shoes, a plurality of magnetic isolation bridges, a plurality of winding grooves and a plurality of openings, wherein the plurality of stator teeth are arranged in a circumferential arrangement at intervals, a first yoke is fixed to one side of the stator teeth, a pole shoe is fixed to the other side of the stator teeth, a magnetic isolation bridge is fixed to two adjacent pole shoes, the winding grooves communicate with the openings, an opening is located between two adjacent first yokes, the opening is used to facilitate winding using a winding device, and a second yoke is installed in one of the openings.

[0007] Optionally, the first yoke is provided with a groove, and the second yoke is provided with a protrusion facing the groove, the protrusion being inserted into the groove.

[0008] Optionally, the stator core includes an adhesive member, which is fixed to the surface of the first yoke facing the second yoke and the surface of the second yoke facing the first yoke.

[0009] Optionally, the adhesive is an epoxy resin adhesive or an acrylic adhesive.

[0010] Optionally, the thickness of the magnetic bridge is 0.3-0.5 mm.

[0011] Optionally, two adjacent pole shoes and the magnetic isolation bridge fixed to the two adjacent pole shoes define a slot, and the slot communicates with the winding slot.

[0012] Optionally, the stator core includes a first insulating layer and a second insulating layer, the first insulating layer covering the surfaces of both ends of the core body, and the second insulating layer covering the surfaces of both ends of the second yoke.

[0013] Optionally, both the first insulating layer and the second insulating layer are made of epoxy resin.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide a stator, including a winding and the above-mentioned stator core, wherein the winding is wound on the stator core.

[0015] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide an electric motor, including a rotor and the stator described above, wherein the rotor is disposed within the stator and the rotor is rotatable relative to the stator.

[0016] In this embodiment, the stator core includes a core body and multiple second yokes. The core body has multiple stator teeth, multiple first yokes, multiple pole shoes, multiple magnetic bridges, multiple winding slots, and multiple openings. The multiple stator teeth are arranged in a circumferential pattern at intervals. A first yoke is fixed to one side of a stator tooth, a pole shoe is fixed to the other side of a stator tooth, and a magnetic bridge is fixed to two adjacent pole shoes. The winding slots communicate with the openings, and an opening is located between two adjacent first yokes. The opening facilitates winding using a winding device, and a second yoke is installed in one of the openings. Because the yoke of the stator core is formed by first and second yokes to create a separate yoke, and an opening is formed between the two first yokes, during stator production, a flying fork winding device is used to wind the core body to form a winding. After the winding is completed, the second yoke is installed in the opening, thereby achieving automatic winding, improving production efficiency and reducing production costs, as well as improving stator consistency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the stator core structure provided in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the core body of the stator core provided in the embodiments of this application from one perspective;

[0020] Figure 3 This is a schematic diagram of the stator core body from another perspective provided in the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the structure of the second yoke of the stator core provided in the embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the stator structure provided in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Stator;

[0025] 1. Stator core; 11. Core body; 111. Stator tooth; 112. First yoke; 1121. Groove; 113. Pole shoe; 114. Magnetic bridge; 115. Winding slot; 116. Opening; 117. Mounting cavity; 118. Slot; 12. Second yoke; 121. Protrusion; 13. First insulation layer; 14. Second insulation layer;

[0026] 2. Windings. Detailed Implementation

[0027] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "locked" to another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figure 1 This application provides a stator core 1, which includes a core body 11, a plurality of second yokes 12, a first insulating layer 13, and a second insulating layer 14. The plurality of second yokes 12 are spaced apart and mounted around the core body 11. The first insulating layer 13 covers the surfaces of both ends of the core body 11. The second insulating layer 14 covers the surfaces of both ends of the second yokes 12.

[0030] In some embodiments, both the first insulating layer 13 and the second insulating layer 14 are made of epoxy resin. Specifically, the first insulating layer 13 is coated with epoxy resin powder on both ends of the iron core body 11, and the second insulating layer 14 is coated with epoxy resin powder on both ends of the second yoke 12. In other embodiments, the first insulating layer 13 and the second insulating layer 14 are made of foamed material, insulating paper material, or winding skeleton.

[0031] For the aforementioned core body 11, please refer to Figure 2 and Figure 3The core body 11 is provided with multiple stator teeth 111, multiple first yokes 112, multiple pole shoes 113, multiple magnetic isolation bridges 114, multiple winding slots 115, and multiple openings 116. The multiple stator teeth 111 are arranged at intervals around each other, and are used for winding to form the winding 2. A first yoke 112 is fixed to one side of the stator tooth 111. A pole shoe 113 is fixed to the other side of the stator tooth 111. The pole shoe 113 is used to increase the contact area of ​​the magnetic flux, reduce the air gap magnetic reluctance, improve the air gap magnetic flux density waveform, and fix the winding 2. A magnetic isolation bridge 114 is fixed to two adjacent pole shoes 113. The thickness of the magnetic isolation bridge 114 is less than the thickness of the ends of the pole shoes 113, making the size of the magnetic isolation bridge 114 small. The magnetic isolation bridge 114 is used to maintain the integrity of the iron core body 11, and the magnetic isolation bridge 114 is easy to achieve magnetic saturation, so that the magnetic isolation bridge 114 can block the magnetic circuit at the ends of the pole shoes 113 and reduce leakage magnetic flux. Multiple pole shoes 113 and multiple magnetic isolation bridges 114 define and form a mounting cavity 117. The two ends of the mounting cavity 117 are through, and the mounting cavity 117 is used for rotor mounting. The winding slot 115 is defined by two adjacent stator teeth 111, two adjacent pole shoes 113, two adjacent first yokes 112, and the magnetic isolation bridge 114 fixed to the two adjacent pole shoes 113. The winding slot 115 is connected to the opening 116 and is used to provide space for the winding 2. The opening 116 is located between two adjacent first yokes 112. In other words, the opening 116 is defined by two adjacent first yokes 112. The opening 116 is used to facilitate winding using a winding device, enabling the use of a fly fork winding device to wind multiple strands in parallel, thereby achieving automatic winding, improving production efficiency and reducing production costs. Compared with manual winding, using a fly fork winding device improves product consistency.

[0032] In some embodiments, the number of winding slots 115 is twelve, but the number of winding slots 115 is not limited to this, and the number of winding slots 115 is set according to actual needs.

[0033] In some embodiments, the core body 11 is produced by a high-speed punching self-riveting process from multiple body pieces. Each body piece is provided with a first rivet part, and the first rivet parts of adjacent body pieces are fastened together to connect and fix the adjacent body pieces.

[0034] It is understood that in some embodiments, the body piece does not have a first rivet, and adjacent body pieces are connected and fixed by adhesive bonding. In other embodiments, multiple body pieces are fixed by through-riveting with rivets.

[0035] In some embodiments, the thickness of the magnetic bridge 114 is 0.3-0.5 mm.

[0036] The first yoke 112 is provided with a groove 1121, which is located on the surface of the first yoke 112 facing the second yoke 12, and the groove 1121 is connected to the opening 116.

[0037] In some embodiments, two adjacent pole shoes 113 and a magnetic isolation bridge 114 fixed to the two adjacent pole shoes 113 define a slot 118. The slot 118 connects to the winding slot 115. Since the winding 2 does not need to be unwound through the slot 118, and part of the sidewall of the slot 118 is defined by the magnetic isolation bridge 114, the size of the slot 118 is small, which is beneficial to improve the cogging torque and increase the strength of the magnetic isolation bridge 114.

[0038] For the second yoke 12 mentioned above, please refer to Figure 4 A second yoke 12 is installed in an opening 116, so that the first yoke 112 and the second yoke 12 are connected in sequence to form an annular yoke, thereby closing the magnetic circuit. The second yoke 12 is provided with a protrusion 121, which is located on the surface of the second yoke 12 facing the first yoke 112 and is inserted into a groove 1121. The protrusion 121 and the groove 1121 cooperate to position the second yoke 12 and facilitate its installation.

[0039] In some embodiments, the number of grooves 1121 and the number of protrusions 121 are both two. One groove 1121 is located on the surface of the first yoke 112 facing a second yoke 12, and the other groove 1121 is located on the surface of the first yoke 112 facing another second yoke 12. One protrusion 121 is located on the surface of the second yoke 12 facing a first yoke 112, and the other protrusion 121 is located on the surface of the second yoke 12 facing another first yoke 112.

[0040] In some embodiments, the second yoke 12 is produced by a plurality of second yoke pieces using a high-speed punching self-riveting process. The second yoke pieces are provided with second rivet parts, and the second rivet parts of adjacent second yoke pieces are fastened together to connect and fix adjacent second yoke pieces.

[0041] It is understood that in some embodiments, the second yoke does not have a second rivet, and adjacent second yokes are connected and fixed by adhesive bonding. In other embodiments, multiple second yokes are fixed by through-riveting with rivets.

[0042] In some embodiments, the stator core 1 includes an adhesive member fixed to the surface of the first yoke 112 facing the second yoke 12 and the surface of the second yoke 12 facing the first yoke 112. Further, the adhesive member is also fixed to the wall surface of the groove 1121 and the surface of the protrusion 121. The adhesive member is used to increase the bonding strength between the first yoke 112 and the second yoke 12.

[0043] In some embodiments, the adhesive is one of various adhesives such as epoxy resin adhesive and acrylic adhesive.

[0044] In some embodiments, the surface of the first yoke 112 facing the second yoke 12 and the surface of the second yoke 12 facing the first yoke 112 are fixed by welding or expansion.

[0045] In this embodiment, the stator core 1 includes a core body 11 and a plurality of second yokes 12. The core body 11 is provided with a plurality of stator teeth 111, a plurality of first yokes 112, a plurality of pole shoes 113, a plurality of magnetic bridges 114, a plurality of winding grooves 115 and a plurality of openings 116. The plurality of stator teeth 111 are arranged in a circumferential arrangement at intervals. A first yoke 112 is fixed to one side of a stator tooth 111, a pole shoe 113 is fixed to the other side of a stator tooth 111, a magnetic bridge 114 is fixed to two adjacent pole shoes 113, the winding groove 115 is connected to the opening 116, and the opening 116 is located between two adjacent first yokes 112. The opening 116 is used to facilitate winding using a winding device, and a second yoke 12 is installed in the opening 116. Since the yoke of the stator core 1 is formed by the first yoke 112 and the second yoke 12 to form a split yoke, and an opening 116 is formed between the two first yokes 112, the core body 11 can be wound into winding 2 by using a flying fork winding equipment with multi-strand winding technology during the stator production process. After the winding 2 is completed, the second yoke 12 is installed in the opening 116, thereby realizing automatic winding 2, improving production efficiency and reducing production costs, and also improving the consistency of the stator.

[0046] This application also provides a stator embodiment; please refer to [link / reference]. Figure 5 The stator includes a winding 2 and the stator core 1 mentioned above. The winding 2 is wound around the stator core 1. Specifically, the winding 2 is wound around the stator teeth 111 of the stator core 1. For the structure and function of the stator core 1, please refer to the above embodiments, which will not be repeated here.

[0047] It should be noted that during the stator production process, after the first insulation layer 13 is covered on both ends of the stator core body 11, a flying fork winding equipment is used to wind the windings onto multiple stator teeth 111 of the stator core 1 to form the winding 2 using a multi-strand winding technique. After the winding is completed, the second yoke 12 covered with the second insulation layer 14 is inserted into the opening 116. A pressure device is used in conjunction with a pressing fixture to press multiple second yokes 12 into multiple openings 116 at the same time, thereby making the assembly tolerance evenly distributed.

[0048] This application also provides an embodiment of an electric motor, which includes a rotor and the stator described above. The rotor is disposed within the stator. Specifically, the rotor is disposed in the mounting cavity 117 of the stator core 1 of the stator. The rotor can rotate relative to the stator. For the structure and function of the stator, please refer to the above embodiment, which will not be repeated here.

[0049] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A stator core for use as an outer casing for a rotor, characterized in that, include: The iron core body is provided with multiple stator teeth, multiple first yokes, multiple pole shoes, multiple magnetic isolation bridges, multiple winding slots and multiple openings. The multiple stator teeth are arranged in a circumferential arrangement at intervals. A first yoke is fixed to one side of the stator teeth, a pole shoe is fixed to the other side of the stator teeth, a magnetic isolation bridge is fixed to two adjacent pole shoes, the winding slots are connected to the openings, and an opening is located between two adjacent first yokes. The opening is used to facilitate winding using a winding device. Multiple second yokes, one of which is mounted on one of the openings.

2. The stator core according to claim 1, characterized in that, The first yoke has a groove, and the second yoke has a protrusion facing the groove.

3. The stator core according to claim 1, characterized in that, The stator core includes an adhesive component, which is fixed to the surface of the first yoke facing the second yoke and the surface of the second yoke facing the first yoke.

4. The stator core according to claim 3, characterized in that, The adhesive is an epoxy resin adhesive or an acrylic adhesive.

5. The stator core according to claim 1, characterized in that, The thickness of the magnetic bridge is 0.3-0.5 mm.

6. The stator core according to claim 1, characterized in that, The two adjacent pole shoes and the magnetic isolation bridge fixed to the two adjacent pole shoes define a slot, and the slot connects to the winding slot.

7. The stator core according to claim 1, characterized in that, The stator core includes a first insulating layer and a second insulating layer. The first insulating layer covers the surfaces of both ends of the core body, and the second insulating layer covers the surfaces of both ends of the second yoke.

8. The stator core according to claim 7, characterized in that, Both the first insulating layer and the second insulating layer are made of epoxy resin.

9. A stator, characterized in that, It includes a winding and a stator core as described in any one of claims 1-8, wherein the winding is wound around the stator core.

10. An electric motor, characterized in that, It includes a rotor and a stator as described in claim 9, wherein the rotor is disposed within the stator and is rotatable relative to the stator.

Images