Winding outgoing line structure of high-voltage concentrated winding motor

Abstract

The utility model discloses a winding outgoing line structure of a high-voltage concentrated winding motor, which comprises a winding with an annular structure and a U-shaped side part of the winding; the outgoing line is arranged in the middle of the U-shaped structure; and the insulating layer is sleeved on the peripheries of the winding and the outgoing line. According to the winding outgoing line structure of the high-voltage concentrated winding motor provided by the invention, the outgoing line is arranged in the middle of the side part of the winding, and the peripheries of the outgoing line and the winding are wrapped with the insulating layer, so that compared with the prior art, the arrangement mode of the outgoing line has the advantages that the distance between the outgoing line and the middle part of the winding is increased; therefore, the creepage distance of the root of the insulating layer on the surface of the outgoing line is increased, and the creepage breakdown phenomenon caused by the winding withstand voltage of the high-voltage concentrated winding motor is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor assembly technical field more specifically, relate to a high pressure concentrated winding motor winding lead -out wire structure. BACKGROUND

[0002] With the increasing cost performance of rare earth permanent magnet material neodymium iron boron (NdFeB), permanent magnet motor has been rapidly developed in the field of industrial drive and servo control system with its high efficiency, high power density, good dynamic response characteristics and other remarkable advantages. The characteristics of small end ratio, small mutual inductance between phases, relatively large self-inductance and asymmetric distribution of structure of fractional slot concentrated winding make it have many advantages such as small loss, high efficiency, high torque density, strong fault tolerance, good flux weakening performance, small short-circuit current, small slot torque and excellent torque characteristics, which have broad application prospects in the fields of wind power generation, ship propulsion and electric vehicles. Fractional slot concentrated winding permanent magnet synchronous motor is currently mainly used in low-voltage motor field. Based on the advantages of fractional slot concentrated winding permanent magnet synchronous motor, the concentrated winding is used in high-voltage low-speed direct drive motor field.

[0003] Due to the shorter end of the concentrated winding coil and the narrower coil span, the electric field distribution of the winding end changes greatly. With the common low-voltage concentrated winding lead-out wire wrapping method, the overlap distance between the lead-out wire and the main insulation is short, and it is difficult to ensure the sealing between the lead-out wire and the main insulation during the wrapping process, which leads to the product to have the phenomenon of creepage breakdown when the voltage is applied, seriously affecting the quality and production efficiency of the product.

[0004] The existing high-voltage concentrated winding lead-out wire structure generally follows the relatively mature low-voltage concentrated winding lead-out wire structure, that is, the winding lead-out wire is parallel to the straight line part of the winding (the straight line part of the winding can be directly formed on the winding module, and the process is simple), and then the lead-out wire is fixed on the winding by wrapping insulation.

[0005] The existing high-voltage concentrated winding lead-out wire structure generally has the following two deficiencies:

[0006] 1) The low-voltage concentrated winding lead-out wire structure is followed, that is, the winding lead-out wire is parallel to the straight line part of the winding, and the position of the lead-out wire basically overlaps with the position of the low-resistance band (the low-resistance band will contact the core, which is the grounding point). Affected by the structure characteristics of the short end of the concentrated winding, the overlap distance between the winding lead-out wire insulation and the main insulation is only a part of the slot opening of the straight line part of the winding (about 20mm, which is the distance between the root of the lead wire insulation and the lead-out position, equivalent to the distance between the root of the lead wire insulation and the grounding point), which cannot meet the design requirements of the creepage distance, and the winding of the high-voltage concentrated winding motor is prone to creepage breakdown during voltage withstand test;

[0007] 2) only the outer insulation is used to fix the lead-out wire on the winding, the shape of the lead-out wire is irregular after the insulation is wrapped, there is a large gap between the insulation of the lead-out wire and the main insulation, and it is difficult to completely fill after the paint is immersed, resulting in poor overall density of the insulation at the position, and the creepage breakdown phenomenon is prone to occur during the winding withstand voltage test of the high-voltage concentrated winding motor.

[0008] In summary, how to avoid the creepage breakdown phenomenon of the winding withstand voltage of the high-voltage concentrated winding motor is a problem that needs to be solved by the technical personnel in the field at present. Practical new type content

[0009] Therefore, the purpose of the utility model is to provide a high-voltage concentrated winding motor winding lead-out wire structure, which can increase the distance between the lead-out wire position and the middle part of the winding, improve the creepage distance of the insulation layer of the root of the lead-out wire, and avoid the occurrence of the creepage breakdown phenomenon.

[0010] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0011] A high-voltage concentrated winding motor winding lead-out wire structure comprises:

[0012] The winding is in a ring structure, and the side of the winding is in a U-shaped structure;

[0013] The lead-out wire is arranged in the middle part of the U-shaped structure;

[0014] The insulation layer is sleeved on the outer periphery of the winding and the lead-out wire.

[0015] Preferably, the lead-out wire comprises a lead-out wire head and a lead-out wire tail, and the lead-out wire head and the lead-out wire tail are arranged on the two sides of the middle part of the U-shaped structure respectively.

[0016] Preferably, two straight parts are arranged between the two sides of the winding, the insulation layer comprises a high-resistance band and a low-resistance band, the high-resistance band is sleeved on the side of the winding, and the low-resistance band is sleeved on the straight part of the winding.

[0017] Preferably, the insulation layer further comprises a lead-out wire insulation layer, the lead-out wire insulation layer is sleeved on the outer periphery of the lead-out wire, the lead-out wire insulation layer and the high-resistance band are arranged in lap joint, and the high-resistance band and the low-resistance band are arranged in lap joint.

[0018] Preferably, the two straight parts and the lead-out wire are arranged in parallel with each other.

[0019] Preferably, the high-resistance band comprises two parts of main insulation layer, and the two parts of main insulation layer are arranged on the two sides of the lead-out wire respectively.

[0020] Preferably, the lead-out wire and the winding are in an integrated structure.

[0021] Preferably, the insulation layer is wound by mica tape, and a starting point of the mica tape is arranged at the connection between the lead-out wire and the winding.

[0022] Preferably, the surface of the insulation layer is further provided with a digital display detection assembly for detecting the voltage of the surface of the insulation layer.

[0023] Preferably, an alarm assembly is further included, which is electrically connected with the digital display detection assembly, and the alarm assembly is used for issuing an alarm when the digital display detection assembly reaches a preset value.

[0024] The high-voltage concentrated winding motor winding lead-out wire structure provided by the utility model has the advantages that the lead-out wire of the structure extends outward from the middle part of the winding side part, and an insulation layer is wrapped and stacked around the outer periphery of the lead-out wire and the winding. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to the provided drawings without creative labor.

[0026] Figure 1 It is a structural schematic view of the high-voltage concentrated winding motor winding lead-out wire structure provided by the utility model.

[0027] Figure 2 It is a structural schematic view of the high-voltage concentrated winding motor winding lead-out wire structure provided by the utility model from another perspective.

[0028] Reference signs:

[0029] 1-winding; 2-lead-out wire; 201-lead-out wire head; 202-lead-out wire tail; 3-insulation layer; 301-high-resistance tape; 302-low-resistance tape; 303-lead-out wire insulation layer. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0031] The core of the utility model discloses a high -voltage concentrated winding motor winding lead -out wire structure, this structure can increase the distance of lead -out wire position and winding middle section part, compared with prior art has improved the creepage distance of lead -out wire root insulating layer, avoids the occurrence of creeping breakdown phenomenon.

[0032] It should be noted that the directions or positional relationships indicated by "upper", "lower", "front", "rear" and the like are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] The high-voltage concentrated winding motor winding lead-out wire structure provided by the present application comprises a winding 1, a lead-out wire 2 and an insulating layer 3.

[0034] The winding 1 is in a ring structure, and the side portion of the winding 1 is in a U-shaped structure.

[0035] The lead-out wire 2 is arranged at the middle portion of the U-shaped structure.

[0036] The insulating layer 3 is sleeved on the outer periphery of the winding 1 and the lead-out wire 2.

[0037] Specifically, please refer to the accompanying drawings Figure 2 The winding 1 is in a ring structure, and is divided into two side portions and two middle portions. The side portion of the winding 1 is in a U-shaped structure, and the lead-out wire 2 is arranged at the middle portion of the U-shaped structure. After the lead-out wire 2 is combined with the U-shaped structure, a Y-shaped structure is formed. The connection between the lead-out wire 2 and the winding 1 can be achieved through the insulating layer 3. Compared with the prior art, the distance between the connection portion of the lead-out wire 2 and the winding 1 and the middle portion of the winding 1 is increased, and the creepage distance of the insulating layer at the root of the lead-out wire 2 is improved.

[0038] On the basis of the above-mentioned embodiment, the lead-out wire 2 comprises a lead-out wire head portion 201 and a lead-out wire tail portion 202, which are arranged on the two sides of the middle portion of the U-shaped structure, respectively.

[0039] Specifically, please refer to the accompanying drawings Figure 1 The lead-out wire 2 is in a U-shaped structure, and the middle portion thereof is arranged in the inner ring of the winding 1 and is conformally arranged with the side portion U-shaped structure of the winding 1 and is attached to the inner wall of the U-shaped structure. The lead-out wire head portion 201 and the lead-out wire tail portion 202 are both arranged to extend towards the outside of the winding 1. The lead-out wire head portion 201, the winding 1 and the lead-out wire tail portion 202 are combined to achieve current transmission.

[0040] In some embodiments, two straight sections are arranged between the two sides of the winding 1, the insulation layer 3 comprises a high-resistance band 301 and a low-resistance band 302, the high-resistance band 301 is arranged on the side of the winding 1, and the low-resistance band 302 is arranged on the straight section of the winding 1.

[0041] Specifically, two identical straight sections are arranged between the two U-shaped sides of the winding 1, the low-resistance band 302 is arranged on the outer periphery of the straight section, and the high-resistance band 301 is arranged on the outer periphery of the U-shaped structure of the side. The arrangement of the low-resistance band 302 and the high-resistance band 301 can prevent electric leakage and ensure the normal use of the winding 1. The high-resistance band 301 is usually made of alkali-free glass fiber band soaked in semiconductor high-resistance paint and is used for the end of the winding 1. The field strength at the end of the winding 1 is stronger than that at the straight edge position, and corona is easily formed at these positions. Therefore, the high-resistance band 301 is used to prevent the damage of the winding 1 caused by corona. The low-resistance band 302 mainly includes iron-containing asbestos band and alkali-free glass fiber band soaked in semiconductor low-resistance paint and is used for the wire bar wire slot part, i.e., the straight edge of the winding 1. The high-resistance band 301 is used for overlapping and wrapping at the transition junction of the straight edge and the end to achieve uniform distribution of electric potential and prevent corona.

[0042] On the basis of the above-mentioned embodiments, the insulation layer 3 further comprises a lead-out wire insulation layer 303, the lead-out wire insulation layer 303 is arranged on the outer periphery of the lead-out wire 2, the lead-out wire insulation layer 303 is arranged in overlapping relationship with the high-resistance band 301, and the high-resistance band 301 is arranged in overlapping relationship with the low-resistance band 302.

[0043] Specifically, the lead-out wire insulation layer 303 is arranged on the outer periphery of the lead-out wire 2, the lead-out wire 2 is arranged at the top of the side of the winding 1, the overlapping distance between the lead-out wire insulation layer 303 and the high-resistance band 301 is increased, i.e., the distance between the root of the lead-out wire insulation layer 303 and the lead-out position of the lead-out wire 2 is increased, and the change of the position of the lead-out wire 2 increases the distance between the lead-out position and the low-resistance band 302. The increase of the above-mentioned two distances can improve the creepage distance of the root of the lead-out wire insulation layer 303.

[0044] On the basis of the above-mentioned embodiments, the two straight sections and the lead-out wire 2 are arranged in parallel with each other.

[0045] Specifically, the two straight sections are arranged in parallel with each other, which can ensure the regular distribution of the field strength, the overall structure is simple, and the manufacturing is convenient. The lead-out wire 2 is conformally arranged on the side of the winding 1, so that the lead-out wire 2 is arranged in parallel with the two straight sections, and the arrangement of the insulation layer 3 is facilitated.

[0046] On the basis of the above-mentioned embodiments, the high-resistance band 301 comprises two part main insulation layers, and the two part main insulation layers are arranged on the two sides of the lead-out wire 2.

[0047] Specifically, the main insulation layer near the high resistance band 301 is divided into upper and lower parts according to the position of the lead-out wire 2, and the upper and lower parts of the main insulation layer can be wrapped separately during the wrapping of the insulation layer. After the wrapping of the upper and lower parts of the main insulation layer is completed, the wrapping of the insulation layer 303 of the lead-out wire can be continued to increase the overlap distance.

[0048] On the basis of the above embodiment, the lead-out wire 2 and the winding 1 are integrated.

[0049] Specifically, for the lead-out wire 2, it should be conformally arranged at the side of the winding 1, and the integrated arrangement can also be used to improve the stability of the structure, and the wrapping difficulty of the insulation layer 3 can also be reduced.

[0050] On the basis of the above embodiment, the insulation layer 3 is wrapped by mica tape, and the starting point of the mica tape is arranged at the connection between the lead-out wire 2 and the winding 1.

[0051] Specifically, for the wrapping of the insulation layer 3, generally, under the premise of ensuring the stacking factor of the middle part of the winding 1, part of the layers of the main insulation mica tape needs to be filled and wrapped layer by layer from the lead-out wire root part below the lead-out wire 2, in order to strengthen the insulation of the lead-out wire root part and fill the gap between the lead-out wire root parts, and the remaining layers of the main insulation mica tape are integrally wrapped above the lead-out wire 2 until the highest point of the coil in the axial direction, and the lead-out wire 2 and the coil are tightly wrapped at the separation point of the lead-out wire 2 and the coil. This wrapping method can fill the gap between the lead-out wire root parts and the gap between the insulation layer 303 of the lead-out wire and the main insulation as much as possible, so as to reduce the creepage gap and increase the creepage breakdown voltage.

[0052] Optionally, after the winding 1 and the lead-out wire 2 are stacked by the mica tape, the winding gap and the micropore can be filled by the insulating paint. After the insulating paint is solidified, a continuous and smooth paint film can be formed on the surface of the impregnated object, and the insulating paint is bonded into a hard whole. The types of insulating paint include silicone, diphenyl ether, polyimide, polyester imide, epoxy resin and unsaturated polyester.

[0053] On the basis of the above embodiment, the surface of the insulation layer 3 is also provided with a digital display detection assembly, which is used to detect the voltage on the surface of the insulation layer 3.

[0054] Specifically, the creepage breakdown voltage of the insulation layer 3 can be detected by a convenient leakage test. The standard leakage test is a common creepage distance test method, which uses standardized test equipment and procedures to simulate the breakdown condition under actual working conditions. Generally, the digital multimeter can be used as the digital display detection assembly to detect the basic electrical parameters such as voltage and current of the insulation layer 3. When the corresponding parameter reaches the preset value, it is considered that the insulation layer leaks.

[0055] On the basis of the above-mentioned embodiments, an alarm component is further included, which is electrically connected with the digital display detection component, and is used for issuing an alarm when the digital display detection component reaches a preset value.

[0056] Specifically, the alarm component is generally selected as an audible and visual alarm component, and when the insulation layer 3 is detected to have a leakage, i.e., the insulation capacity of the insulation layer 3 is not up to the standard, the audible and visual alarm component issues an alarm to alert the operator that the winding 1 and the insulation layer 3 need to be overhauled.

[0057] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the various embodiments can be mutually referred to.

[0058] The high-voltage concentrated winding motor winding lead-out wire structure provided by the utility model is described in detail. The principle and implementation mode of the utility model are described by applying specific examples in this paper, and the description of the above embodiments is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claims.

Claims

1. A high voltage concentrated winding motor winding lead structure, characterized by, The application relates to a winding (1) with a U-shaped structure, a lead wire (2) arranged in the middle of the U-shaped structure, and an insulation layer (3) arranged around the winding (1) and the lead wire (2). The lead wire (2) comprises a lead wire head (201) and a lead wire tail (202), and the lead wire head (201) and the lead wire tail (202) are arranged on the two sides of the middle of the U-shaped structure. Two straight sections are arranged between the two sides of the winding (1), the insulation layer (3) comprises a high-resistance band (301) and a low-resistance band (302), the high-resistance band (301) is arranged around the side of the winding (1), and the low-resistance band (302) is arranged around the straight section of the winding (1). The insulation layer (3) further comprises a lead wire insulation layer (303) arranged around the outer periphery of the lead wire (2), the lead wire insulation layer (303) and the high-resistance band (301) are arranged in a lap joint mode, and the high-resistance band (301) and the low-resistance band (302) are arranged in a lap joint mode.

2. The high voltage concentrated winding motor winding lead structure of claim 1, wherein, The two straight sections and the lead wire (2) are arranged in parallel with each other.

3. The high voltage concentrated winding motor winding lead structure of claim 1, wherein, The high-resistance band (301) comprises two main insulation layers arranged on the two sides of the lead wire (2).

4. The high voltage concentrated winding motor winding lead structure of claim 3, wherein, The lead wire (2) and the winding (1) are in an integrated structure.

5. The high voltage concentrated winding motor winding lead structure of claim 4, wherein, The insulation layer (3) is wound by a mica tape, and the starting point of the mica tape is arranged at the connection position of the lead wire (2) and the winding (1).

6. The high voltage concentrated winding motor winding lead structure of claim 5, wherein, A digital display detection assembly is further arranged on the surface of the insulation layer (3), and the digital display detection assembly is used for detecting the voltage on the surface of the insulation layer (3).

7. The high voltage concentrated winding motor winding lead structure of any one of claims 1 to 6, characterized in that, An alarm assembly is further arranged and electrically connected with the digital display detection assembly, and the alarm assembly is used for sending an alarm when the digital display detection assembly reaches a preset value.

8. The high voltage concentrated winding motor winding lead structure of claim 7, wherein, ​ 9. The high voltage concentrated winding motor winding lead structure of claim 8, wherein, ​ 10. The high voltage concentrated winding motor winding lead structure of claim 9, wherein, ​

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