Straight stator assembly with increased insulation distance
By setting back slots and compensation slots on the stator core, the insulation performance and structural stability of the motor are combined, solving the problems of insulation performance and structural stability of the motor and improving the insulation performance and structural stability of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江苏世珂电机有限公司
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-10
AI Technical Summary
When existing chain-type stator cores are welded into a complete circle, gaps or welds exist between the welding surfaces, resulting in insufficient insulation distance and affecting the insulation performance and operational safety of the motor.
Fold-back grooves and compensation grooves are set on the stator core, and compensation grooves that are recessed towards the stator yoke are set on both sides of the groove opening. The insulation distance is increased by directly injection molding an integral skeleton on the stator core, and the bending process of the stator core is optimized by ribs and transition grooves to ensure insulation performance.
It effectively increases the insulation gap between the stator core and the coil, improves the insulation performance of the motor, reduces operational risks, enhances insulation strength and structural stability, and avoids damage or deformation of the stator core during bending.
Smart Images
Figure CN224481541U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor chain core technology, specifically a straight-chain stator assembly that increases insulation distance. Background Technology
[0002] In the design of chain-type stator core motors for air conditioner compressors, the stator core is an indispensable and important component. It plays a crucial role in bearing and supporting the stator windings, acting like a stable frame to provide basic support for the windings. This is of great significance to the realization of the overall structure and function of the motor.
[0003] Existing chain cores such as Figure 1 As shown, Figure 1 This represents the state of the chain core before welding. At this point, there is a gap A between two adjacent cores. When the existing chain cores are welded together to form a complete circle, as shown... Figure 2 As shown, Figure 2 When the chain-type iron core is welded into a complete circle, there are usually gaps or welds between the welding surfaces of two adjacent iron cores. This leads to insufficient insulation distance between the iron core and the coil, which in turn leads to a decrease in insulation performance, thereby increasing the risk of motor operation.
[0004] Therefore, it is necessary to improve the existing linear stator core structure. Utility Model Content
[0005] In order to solve the problems in related technologies, this utility model provides a straight-chain stator assembly that increases the insulation distance. This structure solves the problem of large gaps between the welding surfaces of the two iron cores when the chain iron cores are assembled into a whole circle.
[0006] To solve the above problems, the following technical solutions are provided:
[0007] A linear stator assembly for increasing insulation distance includes a stator core arranged in a linear fashion and a frame disposed on the stator core. The stator core has a stator yoke and a limiting part. A winding part for mounting the frame is provided on the stator core between the stator yoke and the limiting part. Adjacent stator yokes are connected as a whole by a connecting part. The connecting part is characterized by having a fold-back groove for making the stator core round, and a compensation groove that is recessed toward the stator yoke is provided along the opening direction on both sides of the fold-back groove.
[0008] The above technical solutions facilitate the stator core rolling process by setting foldback slots, and effectively increase the insulation gap by setting compensation slots, thereby improving the motor's insulation performance and reducing the risk of motor operation caused by insufficient insulation distance between the stator core and the coil. By directly injection molding an integral skeleton on the stator core, the step of inserting insulating paper can be eliminated, and the thickness of the skeleton is greater than that of the insulating paper, which can increase the creepage distance between the stator core and the coil winding after rolling, thereby increasing the insulation strength.
[0009] Furthermore, the depth and width of the compensation slots on the stator core, which are arranged in a straight chain, are 0mm-1mm and 8mm-9mm, respectively;
[0010] After the stator core, which is arranged in a straight chain, is rolled into a circle, the vertical distance from the bottom of the compensation groove to the line connecting the two ends of the groove is 1mm-2mm.
[0011] After the stator is assembled, the minimum distance from the bottom of the compensation groove to the stator coil is 4mm-5mm.
[0012] Furthermore, the skeleton is integrally formed and injection molded on the stator core, and a plurality of protruding ribs adapted to the compensation groove are integrally formed on the outer surface of the skeleton in sequence. When the skeleton is injection molded and installed on the stator core, each of the protruding ribs abuts against the side surface of the corresponding compensation groove.
[0013] By using the above technical solution, the protruding ribs abut against the compensation groove, which helps to ensure the insulation distance between the stator core and the coil, thereby enhancing the insulation effect.
[0014] Furthermore, the outer surface of the connecting part is provided with a transition groove for bending the stator core.
[0015] The above technical solution, through the setting of the transition groove, facilitates the bending operation of the stator core, plays a guiding and assisting role in the bending process of the stator core, avoids damage or deformation of the stator core during bending, and thus ensures the shape accuracy of the stator core.
[0016] Furthermore, when the stator core, which is arranged in a straight chain, is rolled into a circle, the cross-section of the compensation groove is triangular, semi-circular, or arc-shaped.
[0017] By using the above technical solutions and defining the cross-sectional shape of the compensation groove, these shapes can optimize the installation process of the frame, reduce stress concentration, and improve the reliability and stability of the structure while ensuring an increase in insulation distance.
[0018] Furthermore, the foldback groove is V-shaped.
[0019] The above technical solution, by setting a V-shaped folding groove, ensures that the stator core can be smoothly formed into a circle. It has a simple structure, is easy to process, and can provide a relatively stable connection structure, which helps to maintain the shape and dimensional accuracy of the entire stator core skeleton structure.
[0020] Furthermore, the transition groove is triangular, semi-circular, or arc-shaped.
[0021] By using the above technical solutions and setting these transition grooves, the stator core can be subjected to more uniform stress during bending, reducing excessive local stress, preventing cracks or deformation in the stator core at the bending point, and improving the service life and structural strength of the stator core.
[0022] Furthermore, the connecting part is provided with a circular arc groove, and the circular arc groove is connected to the fold-back groove.
[0023] Through the above technical solution, the structural arrangement of circular arc groove and folded groove helps to further optimize stress distribution when the stator core is formed into a circle, avoid stress concentration at the connection point, improve the structural strength and reliability of the connection point, and ensure the stability of the entire stator core skeleton structure during motor operation.
[0024] Furthermore, one end of the stator core arranged in a straight chain has a protrusion on its side surface, and the other end of the stator core arranged in a straight chain has a recess that engages with the protrusion on its side surface.
[0025] Through the above technical solution, the cooperation of the protruding and recessed parts can achieve precise docking of the first and last ends after the stator core is rounded, preventing relative displacement of the stator core at the connection point, ensuring the shape accuracy and stability of the entire stator core skeleton structure, and thus ensuring the reliability of motor operation.
[0026] Furthermore, the protrusion is a semi-cylindrical insert, and the recess is a semi-cylindrical groove adapted to the semi-cylindrical shape.
[0027] Through the above technical solution, the semi-cylindrical insert and the corresponding semi-cylindrical groove can provide a larger contact area when docking, making the connection between the first and last ends of the stator core tighter and more stable, reducing the gap at the connection point, further improving the stability and reliability of the entire stator core skeleton structure, and helping to maintain the insulation performance of the motor during operation.
[0028] The above solution has the following advantages:
[0029] 1. The foldback groove facilitates the winding of the stator core into a circle. The compensation groove effectively increases the insulation gap, improves the insulation performance of the motor, and reduces the risk of motor operation caused by insufficient insulation distance between the stator core and the coil. The integrally molded skeleton directly on the stator core eliminates the need for inserting insulating paper. Furthermore, the thickness of the skeleton is greater than that of the insulating paper, which increases the creepage distance between the stator core and the coil winding after winding, thereby increasing the insulation strength.
[0030] 2. By having the ribs rest against the compensation slots, it helps to ensure the insulation distance between the stator core and the coil, thereby enhancing the insulation effect.
[0031] 3. The transition groove facilitates the bending operation of the stator core, plays a guiding and assisting role in the bending process of the stator core, and avoids damage or deformation of the stator core during bending, thereby ensuring the shape accuracy of the stator core.
[0032] 4. Through the cooperation of the protruding and recessed parts, the first and last ends can be precisely connected after the stator core is rounded, preventing relative displacement of the stator core at the connection point, ensuring the shape accuracy and stability of the entire stator core skeleton structure, and thus ensuring the reliability of motor operation. Attached Figure Description
[0033] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:
[0034] Figure 1 This is a diagram of the linear state of a chain-type iron core in existing technology;
[0035] Figure 2 This is a diagram of the circular state of a chain-type iron core in existing technology;
[0036] Figure 3 This is a schematic diagram of the structure of the plastic-encapsulated stator core in a straight-line state in this utility model;
[0037] Figure 4 This is a top view of the plastic-encapsulated stator core with coil assembly in a rolled state in this utility model;
[0038] Figure 5 This is a cross-sectional view of the connection between the plastic-encapsulated stator core in a straight-line state and the frame in this utility model;
[0039] Figure 6 This is a top view of a portion of the stator core in the rolled-up state in this utility model;
[0040] Figure 7 for Figure 4A magnified view of section number P;
[0041] Figure 8 for Figure 4 A magnified view of the section number Q;
[0042] Figure 9 for Figure 4 A sectional view of section BB;
[0043] Figure 10 This is a schematic diagram of the skeleton structure in this utility model;
[0044] Figure 11 This is a schematic diagram of the structure at both ends of the stator core in this utility model;
[0045] Reference numerals: 1. Stator core; 101. Stator yoke; 102. Winding section; 103. Limiting section; 2. Frame; 3. Fold-back groove; 4. Compensation groove; 5. Transition groove; 6. Circular arc groove; 7. Insert block; 8. Groove; 9. Winding groove; 10. Rib. Detailed Implementation
[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0047] like Figure 3-11 As shown, the first embodiment of the linear stator assembly for increasing insulation distance includes a stator core 1 arranged in a linear fashion and a frame 2 disposed on the stator core 1. The stator core 1 has a stator yoke 101 and a limiting part 103. A winding part 102 for winding the coil winding after the frame 2 is installed is provided on the stator core 1 between the stator yoke 101 and the limiting part 103. Adjacent stator yokes 101 are connected as one unit by a connecting part. The connecting part is provided with a fold-back groove 3, which is used to make the stator core 1 round. A compensation groove 4 that is recessed toward the stator yoke 101 is provided along the opening direction on both sides of the fold-back groove 3. That is, by providing the compensation groove 4, the insulation distance between the stator core and the coil after the linear stator core is rolled into a round shape can be increased. Figure 4 As shown in the middle number G.
[0048] The depth and width of the compensation slots on the stator core, which are arranged in a straight chain, are 0mm-1mm and 8mm-9mm, respectively. Figure 5As shown, the depth and width of the compensation slots on the stator core arranged in a straight chain are a and b, respectively. In this specific embodiment, a = 0.3 cm and b = 8.83 cm.
[0049] After the stator core, arranged in a straight chain, is rolled into a circle, the vertical distance from the bottom of the compensation slot to the line connecting the two ends of the slot is 1mm-2mm. This vertical distance is denoted as c. Figure 6 and Figure 7 As shown, in this specific embodiment, c = 1.09 cm;
[0050] After the stator is assembled, the minimum distance from the bottom of the compensation slot to the stator coil is 4mm-5mm. This minimum distance is denoted as d. Figure 8 As shown, in this specific embodiment, d = 4.12 cm.
[0051] The frame 2 is integrally molded and injection molded onto the stator core 1. Multiple ribs 10 that are adapted to the compensation slots 4 are integrally molded on the outer surface of the frame 2. When the frame 2 is injection molded and installed on the stator core 1, each rib 10 abuts against the side surface of the corresponding compensation slot 4. By having the ribs 10 abut against the compensation slots 4, the insulation distance between the stator core 1 and the coil winding can be guaranteed, thereby enhancing the insulation effect.
[0052] The frame 2 is made of insulating material, such as common PA, PBT and PPS. The thickness of the frame 2 is between 0.5mm and 2.5mm, which can be reasonably selected according to the number of coils in the coil winding. Since the frame 2 is injection molded on the stator core, it is not necessary to insert insulating paper into the stator core slot. Moreover, the thickness of the frame 2 is greater than the thickness of the inserted insulating paper. Therefore, in this embodiment, by loading the coil winding through the frame 2, the creepage distance between the coil winding and the stator core 1 is increased, thereby improving the insulation performance of the motor and avoiding the problem of reduced insulation performance caused by a large gap between the welding surfaces of the two cores.
[0053] A circular arc groove 6 is provided on the connecting part, and the circular arc groove 6 is connected to the return groove 3. This structural arrangement of the circular arc groove 6 and the return groove 3 helps to further optimize the stress distribution when the stator core 1 is rounded, avoids stress concentration at the connecting part, improves the structural strength and reliability of the connecting part, and ensures the stability of the entire stator core skeleton structure during motor operation.
[0054] like Figure 11As shown, one end of the stator core 1, arranged in a straight-chain configuration, has a protrusion on its side surface, while the other end has a recess that engages with the protrusion. Through the cooperation of the protrusion and the recess, precise alignment of the two ends of the straight-chain stator core 1 is achieved after the stator core 1 is formed into a circle, preventing relative displacement of the stator core 1 at the connection point. This ensures the shape accuracy and stability of the entire stator core frame structure, thereby guaranteeing the reliability of the motor operation.
[0055] The protruding part is a semi-cylindrical insert 7, and the recessed part is a semi-cylindrical groove 8 that conforms to the semi-cylindrical shape. The semi-cylindrical insert 7 and the corresponding semi-cylindrical groove 8 can provide a larger contact area when mating, making the connection between the first and last ends of the stator core 1 tighter and more stable, reducing the gap at the connection point, further improving the stability and reliability of the entire stator core skeleton structure, and helping to maintain the insulation performance of the motor during operation.
[0056] The outer surface of the connecting part is provided with a transition groove 5 for bending the stator core 1. The transition groove 5 facilitates the bending operation of the stator core 1 and plays a guiding and assisting role in the bending process of the stator core 1, so as to avoid damage or deformation of the stator core 1 during bending and ensure the shape accuracy of the stator core 1.
[0057] After the stator core 1, which is set in a straight chain, is rolled into a circle, the cross-section of the compensation groove 4 is triangular, semi-circular, or arc-shaped. By limiting the cross-sectional shape of the compensation groove 4, these shapes can optimize the installation process of the frame 2, reduce stress concentration, and improve the reliability and stability of the structure while ensuring an increase in insulation distance.
[0058] The V-shaped return groove 3 ensures that the stator core 1 can be smoothly formed into a circle. It features a simple structure, easy processing, and a relatively stable connection structure, helping to maintain the shape and dimensional accuracy of the entire stator core frame. Since the return groove 3 is located between the welded surfaces of the two cores, the compensation groove 4 can move the gap radially outward, thus moving the gap between the welded surfaces of the two cores away from the coil windings. This increases the insulation distance, further improving the motor's insulation performance and ensuring safe motor operation.
[0059] The transition groove 5 is triangular, semi-circular, or arc-shaped. These shapes of transition grooves 5 can make the stator core 1 more evenly stressed during bending, reduce the situation of excessive local stress, prevent the stator core 1 from cracking or deforming at the bending part, and improve the service life and structural strength of the stator core 1.
[0060] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A linear stator assembly for increasing insulation distance, comprising a stator core (1) arranged in a linear fashion and a frame (2) disposed on the stator core (1), wherein the stator core (1) has a stator yoke (101) and a limiting part (103), a winding part (102) is disposed between the stator yoke (101) and the limiting part (103), and adjacent stator yokes (101) are connected as a whole by a connecting part, characterized in that, The connecting part is provided with a fold-back groove (3), which is used to make the stator core (1) round, and a compensation groove (4) is provided on the fold-back groove (3) along the opening direction on both sides of its groove opening, which is recessed towards the stator yoke (101).
2. The linear stator assembly with increased insulation distance as described in claim 1, characterized in that, The depth and width of the compensation slots on the stator core, which are arranged in a straight chain, are 0mm-1mm and 8mm-9mm, respectively. After the stator core, which is arranged in a straight chain, is rolled into a circle, the vertical distance from the bottom of the compensation groove to the line connecting the two ends of the groove is 1mm-2mm. After the stator is assembled, the minimum distance from the bottom of the compensation groove to the stator coil is 4mm-5mm.
3. The linear stator assembly with increased insulation distance as described in claim 1, characterized in that, The skeleton (2) is integrally formed and injection molded on the stator core (1). Multiple ribs (10) that are adapted to the compensation groove (4) are integrally formed on the outer surface of the skeleton (2). When the skeleton (2) is injection molded and installed on the stator core (1), each rib (10) abuts against the side surface of the corresponding compensation groove (4).
4. The linear stator assembly with increased insulation distance as described in claim 1, characterized in that, The outer surface of the connecting part is provided with a transition groove (5) for bending the stator core (1).
5. The linear stator assembly with increased insulation distance as described in claim 1, characterized in that, When the stator core (1) arranged in a straight chain is rolled into a circle, the cross section of the compensation groove (4) is triangular, semi-circular or arc-shaped.
6. The linear stator assembly with increased insulation distance as described in claim 1, characterized in that, The foldback groove (3) is V-shaped.
7. The linear stator assembly with increased insulation distance as described in claim 4, characterized in that, The transition groove (5) is triangular, semi-circular, or arc-shaped.
8. The linear stator assembly with increased insulation distance as described in claim 1, characterized in that, The connecting part is provided with a circular arc groove (6), and the circular arc groove (6) is connected to the fold-back groove (3).
9. The linear stator assembly with increased insulation distance as described in claim 1, characterized in that, One end of the stator core (1) arranged in a straight chain has a protrusion on its side surface, and the other end of the stator core (1) arranged in a straight chain has a recess that engages with the protrusion on its side surface.
10. The linear stator assembly with increased insulation distance as described in claim 9, characterized in that, The protrusion is a semi-cylindrical insert (7), and the recess is a semi-cylindrical groove (8) adapted to the semi-cylindrical shape.