Insulation framework of motor iron core and motor iron core

Abstract

The utility model discloses an insulation skeleton of motor iron core and motor iron core, including insulation main body skeleton ring and a plurality of insulation tooth portion distributed at interval along the insulation main body skeleton ring towards the periphery, each insulation tooth portion and the tooth portion of motor iron core are arranged in corresponding fit, the two sides of each insulation tooth portion are respectively provided with insulation rib sheet, the insulation rib sheet is provided with a plurality of insulation ribs, and the insulation rib sheet is provided with a plurality of insulation ribs. The insulating rib sheets are spaced along the end parts of the insulating tooth parts where the insulating rib sheets are located; the insulating rib sheets extend on the insulating tooth parts along the circumferential direction of the insulating main body framework ring, and the extending end parts of the insulating rib sheets are positioned in the insulating grooves of the adjacent insulating tooth parts; the inner side of the extending end part of the insulating rib sheet extends in the axial direction of the insulating main body framework ring to form a clamping groove which is used for fixing and clamping the top end position of the insulating paper; each insulation rib sheet comprises a protruding part which is formed by extending in the axial direction of the insulation main body framework ring from one side of the insulation tooth part where the insulation rib sheet is located. According to the utility model, the ground insulation grade can be obviously improved, the slot space factor of the winding coil is increased, and the motor efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of motor manufacturing, and in particular relates to an insulating frame of a motor iron core and the motor iron core. Background Art

[0002] To promote the nation's carbon neutrality and peak carbon emissions goals, permanent magnet variable-frequency brushless motors (PMVBLs) are increasingly being adopted in a wider range of applications (particularly in industrial motors in recent years) due to their 10%-30% energy savings compared to traditional motors. Since most industrial motors utilize high-voltage inputs of 220V and 380V, the higher the voltage, the higher the insulation quality and consistency required of the coils. Outer rotor PM motors typically have a higher power density than inner rotor motors, making them more suitable for market demand. Therefore, upgrading the insulation quality of outer rotor motor coils is imperative.

[0003] Existing outer rotor motor cores use a simple insulation method that involves adding plastic sheets to silicon steel sheets, adding injection-molded insulation rings to the sides of brackets, and integrating these two identical shapes into one. These are then embedded in the core and bracket to insulate the outer rotor motor core. However, this insulation structure results in the following drawbacks for existing outer rotor motors:

[0004] First, the outer rotor motor core is made of silicon steel sheets with plastic sheets or injection-molded insulation rings, which cannot effectively protect the winding from being squeezed on the exposed coils at both ends and from being damaged by friction on the enameled wire during production and transportation.

[0005] Secondly, the casing leakage insulation level, phase insulation level, and turn insulation level are not high.

[0006] In view of the above, the applicant hopes to seek technical solutions to improve the above technical problems. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide an insulating frame and a motor core for a motor core, which can significantly improve the insulation level to the ground, effectively protect the winding from deformation during the winding process to avoid causing the paper wrapping phenomenon during the coil winding process, increase the slot fill rate of the winding coil, and improve the motor efficiency.

[0008] The technical solutions adopted in this utility model are as follows:

[0009] An insulating skeleton of a motor core is correspondingly fitted and arranged at the end of the outer rotor motor core. It is an integrally formed part, including an insulating main skeleton ring and a plurality of insulating teeth extending from the insulating main skeleton ring to the outer periphery. Each insulating tooth is correspondingly fitted and arranged with a tooth portion of the motor core. Insulating ribs are provided on both sides of each insulating tooth.

[0010] The insulating ribs have a spacing along the ends of the insulating teeth where they are located;

[0011] The insulating ribs extend along the circumference of the insulating main body frame ring on the insulating tooth portion, and the extended ends are located in the insulating grooves of the adjacent insulating tooth portion;

[0012] The inner side of the extended end of the insulating rib is axially extended to form a clamping groove of the insulating body skeleton ring, which is used to fix the top end of the insulating paper;

[0013] The insulating ribs include a protrusion extending from one side of the insulating tooth portion where the insulating ribs are located along the axial direction of the insulating main body skeleton ring.

[0014] Preferably, the distance between the insulating rib and the end of the insulating tooth portion where it is located is in the range of 0.5-3.5 mm.

[0015] Preferably, the insulating rib includes a first extension section of the insulating rib attached to the insulating tooth portion and a second extension section of the insulating rib located in the insulating groove; wherein the length of the first extension section of the insulating rib accounts for 1 / 3 to 1 / 2 of the extension length of the insulating rib.

[0016] Preferably, the length of the second extension section of the insulating rib is in the range of 1-4 mm.

[0017] Preferably, the axial extension length of the extended end portion of the insulating rib is 0.5-5 mm.

[0018] Preferably, the protrusion height of the protrusion is in the range of 0.1-1 mm, which is conducive to widening the insulation paper of the motor core to extend out of the slot, thereby enhancing the insulation level of the coil to the ground.

[0019] Preferably, the thickness of the insulating skeleton is in the range of 1-5 mm.

[0020] Preferably, a wire bridge is provided at the connecting end surface of the insulating tooth portion and the insulating main body skeleton ring to prevent the winding from being too tight and pressing the insulating paper radially inward during the winding process of the motor core.

[0021] Preferably, an external force protection support seat is provided on the outer side of the insulating main body skeleton ring, and the external force protection support seat protrudes outward in the axial direction relative to the winding to protect the winding from external force impact; and / or, a motor coil clamping position is provided on the inner periphery of the insulating main body skeleton ring to fix the three-phase winding in parallel and reduce the total axial size of the winding coil to prevent leakage at the connection of the three-phase winding in parallel and arcing of the winding.

[0022] A motor core comprises a first insulating frame and a second insulating frame respectively located at two ends of the motor core, wherein the first insulating frame and / or the second insulating frame are based on the insulating frame of the motor core described above.

[0023] The utility model proposes that by arranging a specific insulating rib structure on the insulating tooth part of the insulating skeleton, the insulation level to the ground can be significantly improved, and the winding can be effectively protected from deformation during the winding process to avoid causing the paper wrapping phenomenon during the coil winding process, thereby increasing the slot fill rate of the winding coil and improving the motor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the outer side structure of the insulating skeleton in a specific embodiment of the present utility model;

[0025] Figure 2 This is a schematic structural diagram of the insulating skeleton in a specific embodiment of the present invention;

[0026] Figure 3 yes Figure 2 A magnified view of the structure at center A;

[0027] Figure 4 This is a schematic diagram of the inner side structure of the insulating frame in a specific embodiment of the present utility model;

[0028] Figure 5 yes Figure 4 A magnified view of the structure at point B in the middle;

[0029] Figure 6 This is a schematic diagram of the peripheral structure of the insulating frame in a specific embodiment of the present utility model;

[0030] Figure 7 This is a schematic diagram of the motor core structure under a specific embodiment of the utility model;

[0031] Figure 8 yes Figure 7 A magnified view of the structure at point C in the middle;

[0032] Figure 9 It is a schematic diagram of the circumferential structure of the motor core according to a specific implementation method of the utility model. DETAILED DESCRIPTION

[0033] The embodiment of the utility model discloses an insulating skeleton of a motor core, which is correspondingly fitted and arranged at the end of the outer rotor motor core, adopts an integrally formed part, includes an insulating main body skeleton ring, and a plurality of insulating teeth extending toward the outer periphery along the insulating main body skeleton ring and distributed at intervals, each insulating tooth portion is correspondingly fitted and arranged with a tooth portion of the motor core, and insulating ribs are respectively provided on both sides of each insulating tooth portion, wherein the insulating ribs have a spacing along the end of the insulating tooth portion where they are located; the insulating ribs extend on the insulating tooth portion along the circumferential direction of the insulating main body skeleton ring, and the extended end portion thereof is located in the insulating groove of the adjacent insulating tooth portion; the inner side of the extended end portion of the insulating ribs is axially extended by the insulating main body skeleton ring to form a clamping groove for fixing the top position of the clamping insulating paper; and the insulating ribs include a protrusion formed by extending from one side of the insulating tooth portion where it is located along the axial direction of the insulating main body skeleton ring.

[0034] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0035] See Figures 1-6 As shown (and combined with Figure 7-Figure 9 As shown), an insulating skeleton of a motor core is correspondingly fitted and arranged at the end of the outer rotor motor core. It adopts an integrally formed part, including an insulating main skeleton ring 11, and a plurality of insulating teeth 12 extending from the insulating main skeleton ring 11 to the outer periphery. Each insulating tooth 12 is correspondingly fitted with a tooth 21 of the motor core 20. Insulating ribs 13 are respectively provided on both sides of each insulating tooth 12, wherein the insulating ribs 13 have a spacing along the end of the insulating tooth 12 where they are located; the insulating ribs 13 are provided with a spacing along the end of the insulating tooth 12 where they are located; 3 extends along the circumference of the insulating body frame ring 11 on the insulating tooth portion 12, and its extended end portion 13a is located in the insulating groove of the adjacent insulating tooth portion 12; the inner side of the extended end portion 13a of the insulating rib 13 extends axially in the insulating body frame ring 11 to form a clamping groove 14' (for positioning the insulating paper 22) for fixing and clamping the top end 14 of the insulating paper 22; and the insulating rib 13 includes a protrusion 15 extending from one side of the insulating tooth portion 12 where it is located along the axial direction of the insulating body frame ring 11.

[0036] Preferably, in this embodiment, the spacing D1 between the insulating rib 13 and the end 12a of the insulating tooth portion 12 in which it is located is in a range of 0.5-3.5 mm, that is, the insulating rib 13 is approximately in the slot wedge fixed position; more specifically, preferably, the insulating rib 13 includes a first insulating rib extension segment 13b attached to the insulating tooth portion 12 and a second insulating rib extension segment 13c located in the insulating slot 16 (formed by adjacent insulating ribs 13); wherein the length L2 of the first insulating rib extension segment is 1 / 3 to 1 / 2 of the extension length L1 of the insulating rib 13, thereby ensuring the strength of the main body of the insulating rib 13; further preferably, in this embodiment, the extension length of the second insulating rib extension segment 13c is in a range of 1-4 mm;

[0037] Preferably, in this embodiment, the axial extension length H1 of the extended end portion 13a of the insulating rib 13 is 0.5-5 mm, which effectively protects the winding from deformation during the winding process to avoid causing the paper wrapping phenomenon during the coil winding process.

[0038] Preferably, in this embodiment, the protrusion height range of the protrusion 15 is 0.1-1mm, which is conducive to widening the insulating paper 22 of the motor core 20 to extend out of the slot, enhancing the insulation level of the coil to the ground, and increasing the arc strength of the motor. At the same time, by reducing the deformation of the insulating paper 22 and eliminating the insulating slot wedge, space is saved for the embedding amount of the winding coil conductor, thereby allowing more embedded coil conductors to increase the slot fill rate and improve the motor efficiency.

[0039] Since the weak point of the insulation of the motor winding coil to the ground is mainly the position of the iron core slot, the thickness of the insulation frame can be thinned while ensuring the same insulation level. After the insulation frame is thinned, the circumference of each turn of the coil and the total length of the coil conductor are reduced, which directly reduces the internal resistance of the winding coil to improve the efficiency of the motor and reduce the heat generation of the motor (W=UI, I=U / R) (especially suitable for precision wiring). For this reason, preferably, in this embodiment, the thickness range of the insulation frame is 1-5mm.

[0040] Preferably, in this embodiment, a wire stop bridge 17 (extending radially outward along the outer circumference of the insulating main body skeleton ring 11) is provided at the connecting end surface of the insulating tooth portion 12 and the insulating main body skeleton ring 11. The wire stop bridge 17 is used to prevent the winding from being too tight and radially pressing the insulating paper inward during the winding process of the motor core.

[0041] Preferably, in this embodiment, an external force protection support seat 18 is provided on the outside of the insulating main frame ring 11. The external force protection support seat 18 protrudes outward in the axial direction relative to the winding to protect the winding from external force impact. Preferably, the external force protection support seat 18 is relative to the winding (that is, the enameled wire, Figure 7-Figure 9(not shown) protrudes 1-3 mm outward in the axial direction, and when the coil is produced, transported, and used, the axial high point of the support seat contacts the work surface and tooling and other external forces, effectively protecting the paint coating of the winding coil (usually enameled wire) from external force impact; and / or, preferably, in this embodiment, the inner periphery of the insulating body skeleton ring 11 is provided with a motor coil wire clamping position 19, which is used to fix the three-phase winding parallel head to reduce the total axial size of the winding coil to prevent leakage at the connection of the three-phase winding parallel head and arcing of the winding.

[0042] See Figure 7-Figure 9 As shown, a motor core 20 includes a first insulating frame 10 and a second insulating frame 10 respectively located at both ends of the motor core 20. The first insulating frame 10 and the second insulating frame 10 both adopt the insulating frame of the motor core above this embodiment.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0044] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An insulating frame for a motor core, correspondingly arranged at the end of the outer rotor motor core, characterized in that: An integrally formed part is used, including an insulating main frame ring, and a plurality of insulating teeth extending from the insulating main frame ring to the outer periphery at intervals. Each insulating tooth is fitted with a tooth portion of the motor core. Insulating ribs are provided on both sides of each insulating tooth. The insulating ribs have a spacing along the ends of the insulating teeth where they are located; The insulating ribs extend along the circumference of the insulating main body frame ring on the insulating tooth portion, and the extended ends are located in the insulating grooves of the adjacent insulating tooth portion; The inner side of the extended end of the insulating rib is axially extended to form a clamping groove of the insulating body skeleton ring, which is used to fix the top end of the insulating paper; The insulating ribs include a protrusion extending from one side of the insulating tooth portion where the insulating ribs are located along the axial direction of the insulating main body skeleton ring.

2. The insulating skeleton of the motor core according to claim 1, characterized in that: The distance between the insulating rib and the end of the insulating tooth portion where it is located is in the range of 0.5-3.5 mm.

3. The insulating skeleton of the motor core according to claim 1, characterized in that: The insulating rib includes a first extension section of the insulating rib attached to the insulating tooth portion and a second extension section of the insulating rib located in the insulating groove; wherein the length of the first extension section of the insulating rib accounts for 1 / 3 to 1 / 2 of the extension length of the insulating rib.

4. The insulating skeleton of the motor core according to claim 3, characterized in that: The length of the second extension section of the insulating rib is in the range of 1-4 mm.

5. The insulating skeleton of the motor core according to claim 1, characterized in that: The axial extension length of the extended end portion of the insulating rib is 0.5-5 mm.

6. The insulating skeleton of the motor core according to claim 1, characterized in that: The protrusion height range of the protrusion is 0.1-1 mm, which is conducive to widening the insulation paper of the motor core to extend out of the slot, thereby enhancing the insulation level of the coil to the ground.

7. The insulating skeleton of the motor core according to claim 1, characterized in that: The thickness of the insulating frame ranges from 1 to 5 mm.

8. The insulating frame of the motor core according to claim 1, characterized in that: A wire stop bridge is provided on the connecting end surface of the insulating tooth portion and the insulating main body skeleton ring, which is used to prevent the winding from being too tight and compressing the insulating paper radially inward during the winding process of the motor core.

9. The insulating frame of the motor core according to claim 1, characterized in that: An external force protection support seat is provided on the outer side of the insulating main body skeleton ring, and the external force protection support seat protrudes outward in the axial direction relative to the winding to protect the winding from external force impact; and / or, a motor coil clamping position is provided on the inner periphery of the insulating main body skeleton ring to fix the three-phase winding in parallel and reduce the total axial size of the winding coil to prevent leakage at the connection of the three-phase winding in parallel and arcing of the winding.

10. A motor core, comprising a first insulating frame and a second insulating frame respectively located at two ends of the motor core, characterized in that: The first insulating frame and / or the second insulating frame is the insulating frame of the motor core according to any one of claims 1-9.

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