CN214380380U - Motor stator with insulation structure - Google Patents

Abstract

The utility model discloses a motor stator with an insulation structure, which comprises a stator core, a winding coil and a leading-out cable, wherein an inner groove which is axially penetrated through is uniformly arranged in the circumferential direction of the inner circle of the stator core, outer grooves which are axially penetrated through are uniformly arranged in the circumferential direction of the outer circle and at the positions corresponding to the inner grooves, inner teeth are formed between two adjacent inner grooves, and outer teeth are formed between two adjacent outer grooves; inner groove tooth tops are arranged on two sides of each inner tooth, and outer groove tooth tops are arranged on two sides of each outer tooth; an inner groove main insulation is arranged between the winding coil and the inner groove, and an outer groove main insulation is arranged between the winding coil and the outer groove; an inner slot wedge is arranged at the notch of the inner slot; and an outer slot wedge is arranged at the opening of the outer slot. The utility model discloses a motor stator who contains insulation system has both guaranteed the little advantage of toroidal coil winding overhang size, can improve thermal conductivity again and have higher insulating reliability, makes the motor long-time operation that can reliable and stable.

Description

Motor stator with insulation structure

Technical Field

The utility model relates to a motor stator who contains insulation system belongs to electromechanical technical field.

Background

At present, high-speed motors are gradually used in a plurality of fields due to the characteristics of high rotating speed, small volume, high power density and the like. Most of stator coils of existing high-speed motors adopt an inner groove winding mode, but due to the fact that the number of poles of the motor is small, after the coils are formed in a winding mode, the axial size of the coils at the end portions is too long, the size of the effective axial portion of the stator is limited, and the power limit of the motor is limited. In recent years, a mode of winding a ring-shaped coil winding in an inner slot and an outer slot of a stator is presented to solve the defects of the inner slot winding mode; however, due to the structural characteristics of the winding type coil winding, hidden troubles exist in end insulation, and gaps may exist among the coil winding, the insulation in the slot and the iron core in the inner slot and the outer slot, so that the reliability of the motor in operation is influenced. Therefore, there is a need to develop a stator of an electric machine to improve or solve the problem.

Disclosure of Invention

To the above-mentioned prior art, the utility model provides a motor stator who contains insulation construction can solve the hidden danger that the tip insulation exists, improves the reliability of motor operation.

The utility model discloses a realize through following technical scheme:

a motor stator with an insulation structure comprises a stator core, a winding coil and a lead-out cable, wherein the stator core is in a cylindrical shape (the axial cross section is in a circular ring shape), inner grooves which axially penetrate through are uniformly formed in the circumferential direction of an inner circle, outer grooves which axially penetrate through are uniformly formed in the circumferential direction of an outer circle and at positions corresponding to the inner grooves, the number of the outer grooves is equal to that of the inner grooves, inner teeth are formed between every two adjacent inner grooves, and outer teeth are formed between every two adjacent outer grooves; inner groove tooth tops are arranged on two sides of each inner tooth (two sides along the circumferential direction of the stator core, not two sides along the axial direction; the same below), and outer groove tooth tops are arranged on two sides of each outer tooth;

the winding coils are annularly wound in a corresponding group of inner groove-outer groove;

an inner groove main insulation is arranged between the winding coil and the inner groove (namely, the inner groove main insulation surrounds the periphery of the winding coil), and an outer groove main insulation is arranged between the winding coil and the outer groove (namely, the outer groove main insulation surrounds the periphery of the winding coil); in order to fix the winding coil of the inner groove and the main insulation of the inner groove, an inner groove wedge is arranged at the notch of the inner groove and is blocked and fixed by the tooth point of the inner groove; in order to fix the outer slot winding coil and the outer slot main insulation, an outer slot wedge is arranged at the opening of the outer slot, the outer slot wedge is blocked and fixed by an outer slot tooth point, and the outer slot tooth point and the outer slot wedge are matched to fix the outer slot main insulation, ensure the insulation reliability, ensure that the outer slot winding coil is tightly and smoothly fixed in the outer slot, and facilitate the isolation and assembly of other mating parts such as a shell and an end cover;

the inner groove main insulation, the inner groove wedge, the outer groove main insulation and the outer groove wedge form an insulation structure together.

Furthermore, the stator core is formed by axially laminating and fixing a plurality of silicon steel sheets with the same specification into a whole.

Furthermore, two end insulating plates are respectively arranged on two axial sides of the stator core; one side of the end insulating plate is a plane, the other side of the end insulating plate is provided with an arc-shaped bulge, the plane side is attached to (firmly adhered to) the stator core, and the arc-shaped bulge side faces outwards.

Further, the shape of the end insulating plate is consistent with the shape of the axial cross section of the stator core.

Further, the end insulating plate is processed by an insulating plate.

Furthermore, the joints of the winding coils are connected according to an electromagnetic design and are led out by an outgoing cable.

Further, all parts are cured and filled in the tiny gaps by vacuum pressure dip painting.

Further, the inner slot teeth are located in the middle of the inner slot (the "middle" does not refer to the center, but refers to other positions except the end), so that the inner slot is divided into a first inner slot space near the outer circumference of the stator core and a second inner slot space near the inner circumference of the stator core by the inner slot teeth.

Furthermore, the outer groove tooth tops are located at the outer groove notches.

Further, the number of the inner grooves is 24.

The utility model discloses a motor stator who contains insulation system, by tip insulation board, inside groove owner insulation, interior slot wedge, outer groove owner insulation and outer slot wedge constitute insulation system jointly, this kind of insulation system separates stator core and winding coil completely by insulating medium from physics, also can guarantee simultaneously with other fitting pieces, like physics isolations such as casing, end cover, has guaranteed the reliability of main insulation to reduced with the stator core by the electric possibility of discharging of electrical distance problem. The arc-shaped bulges on the outer sides of the end insulating plates are designed, so that the winding coils are fully contacted with the end insulating plates, and the heat conducting performance and the insulating reliability are improved. The inner slot wedge and the outer slot wedge are respectively arranged in the inner slot opening and the outer slot opening and are fixed by the inner slot tooth point and the outer slot tooth point, so that the winding coil can be fully contacted with insulation and can be easily fixed in appearance, the winding coil is physically isolated, and the heat conduction capability and the insulation reliability are improved.

The utility model discloses a motor stator who contains insulation system has both guaranteed the little advantage of toroidal coil winding overhang size, can improve thermal conductivity again and have higher insulating reliability, makes the motor long-time operation that can reliable and stable.

The various terms and phrases used herein have the ordinary meaning as is well known to those skilled in the art. To the extent that the terms and phrases are not inconsistent with a known meaning, the meaning of the present invention is expressed, the specification is set forth.

Drawings

FIG. 1: the utility model discloses a stator structure schematic diagram.

FIG. 2: stator structure axial view.

FIG. 3: stator axial partial view (the part shown by the dotted line in fig. 2).

FIG. 4: stator core schematic.

FIG. 5: stator core axial view.

FIG. 6: schematic end insulator plate.

Wherein: 1-stator core, 2-end insulating plate, 3-winding coil, 4-leading-out cable, 5-outer slot main insulation, 6-outer slot wedge, 7-inner slot main insulation, 8-inner slot wedge, 11-outer slot, 12-inner slot, 13-outer tooth, 14-inner tooth, 15-outer slot tooth tip, 16-inner slot tooth tip and 21-arc protrusion.

Detailed Description

The present invention will be further described with reference to the following examples. However, the scope of the present invention is not limited to the following examples. Those skilled in the art will appreciate that various changes and modifications may be made to the invention without departing from the spirit and scope of the invention.

Embodiment 1 Motor insulation Structure and Motor stator

A motor stator with an insulation structure comprises a stator iron core 1, a winding coil 3 and a lead-out cable 4, as shown in figures 1-5, wherein the stator iron core 1 is formed by axially laminating and fixing a plurality of silicon steel sheets with the same specification into a whole; the stator core 1 is in a cylindrical shape (the axial cross section is in a circular ring shape), inner grooves 12 which axially penetrate are uniformly formed in the circumferential direction of the inner circle, outer grooves 11 which axially penetrate are uniformly formed in the circumferential direction of the outer circle and at positions corresponding to the inner grooves 12, the number of the outer grooves 11 is equal to (24) that of the inner grooves 12, inner teeth 14 are formed between every two adjacent inner grooves 12, and outer teeth 13 are formed between every two adjacent outer grooves 11; each inner tooth 14 is provided with inner flute tips 16 on both sides and each outer tooth 13 is provided with outer flute tips 15 on both sides. The inner slot 12 is divided by an inner slot tooth tip 16 into a first inner slot space near the outer circumference of the stator core 1 and a second inner slot space near the inner circumference of the stator core 1.

The winding coil 3 is annularly wound in a corresponding group of inner grooves 12-outer grooves 11; the joints of the winding coil 3 are connected according to an electromagnetic design and are led out by an outgoing cable 4.

An inner groove main insulation 7 is arranged between the winding coil 3 and the inner groove 12, and an outer groove main insulation 5 is arranged between the winding coil 3 and the outer groove 11; in order to fix the inner slot winding coil 3 and the inner slot main insulation 7, an inner slot wedge 8 is arranged at the notch of the inner slot 12, and the inner slot wedge 8 is blocked and fixed by an inner slot tooth tip 16; in order to fix the outer slot winding coil 3 and the outer slot main insulation 5, an outer slot wedge 6 is arranged at the notch of the outer slot 11, and the outer slot wedge 6 is blocked and fixed by an outer slot tooth tip 15. Except for fixing the inner groove main insulation 7 and ensuring the insulation reliability, the inner groove tooth tips 16 and the inner groove wedges 8 are matched to ensure that the inner groove winding coil 3 is tightly and smoothly fixed in the first inner groove space, so that the empty second inner groove space is favorable for ventilation and heat dissipation while the inner groove space occupied by the inner groove winding coil 3 is reduced. In addition to fixing the outer slot main insulation 5 and ensuring insulation reliability, the outer slot winding coil 3 is tightly and smoothly fixed in the outer slot 11 by the matching arrangement of the outer slot tooth tip 15 and the outer slot wedge 6, which is beneficial to the isolation and assembly of other mating parts such as a shell and an end cover.

In preparation, all parts were cured and filled in the tiny gaps by vacuum pressure dip painting.

The insulation structure formed by the inner groove main insulation 7, the inner groove wedges 8, the outer groove main insulation 5 and the outer groove wedges 6 completely physically separates the stator core 1 from the winding coil 3 by an insulation medium, and can also ensure physical isolation from other mating parts such as a shell, an end cover and the like, so that the reliability of the main insulation is ensured, and the possibility of discharge between the winding coil 3 and the stator core 1 due to the problem of electrical distance is reduced. The inner slot wedge 8 and the outer slot wedge 6 are respectively arranged at the opening of the inner slot 12 and the opening of the outer slot 11 and are fixed by the inner slot tooth point 16 and the outer slot tooth point 15, so that the winding coil 3 can be fully contacted with insulation and can be easily fixed in appearance, and the physical isolation is realized, and the heat conduction capability and the insulation reliability are improved.

Example 2

The difference from example 1 is that: an end insulating plate 2 is respectively arranged at two axial sides of the stator core 1, the shape of the end insulating plate 2 is consistent with the shape of the axial cross section of the stator core, as shown in fig. 6, one side of the end insulating plate 2 is a plane, the other side is provided with an arc-shaped bulge 21, the plane side is attached (firmly adhered) to the stator core 1, and the arc-shaped bulge 21 side faces outwards; the end insulating plate 2 is formed by processing an insulating plate. The arc-shaped bulge 21 of the end insulating plate 2 enables the winding coil 3 to be in full contact with the end insulating plate 2, and further improves the heat-conducting property and the insulating reliability.

The above examples are provided to those of ordinary skill in the art to fully disclose and describe how to make and use the claimed embodiments, and are not intended to limit the scope of the disclosure herein. Modifications apparent to those skilled in the art are intended to be within the scope of the appended claims.

Claims (9)

1. The utility model provides a motor stator who contains insulation system, includes stator core, winding coil and extraction cable, its characterized in that: the stator core is in a cylindrical shape, inner grooves which are axially penetrated through are uniformly formed in the circumferential direction of an inner circle, outer grooves which are axially penetrated through are uniformly formed in the circumferential direction of an outer circle and at positions corresponding to the inner grooves, inner teeth are formed between every two adjacent inner grooves, and outer teeth are formed between every two adjacent outer grooves; inner groove tooth tops are arranged on two sides of each inner tooth, and outer groove tooth tops are arranged on two sides of each outer tooth;

the winding coils are annularly wound in a corresponding group of inner groove-outer groove;

an inner groove main insulation is arranged between the winding coil and the inner groove, and an outer groove main insulation is arranged between the winding coil and the outer groove; an inner slot wedge is arranged at the notch of the inner slot and is blocked and fixed by the tooth point of the inner slot; and an outer slot wedge is arranged at the opening of the outer slot and is blocked and fixed by the tooth point of the outer slot.

2. The motor stator with insulation structure of claim 1, wherein: the stator iron core is formed by axially laminating and fixing a plurality of silicon steel sheets with the same specification into a whole.

3. The motor stator with insulation structure of claim 1, wherein: two end insulating plates are respectively arranged on two axial sides of the stator core; one side of the end insulating plate is a plane, the other side of the end insulating plate is provided with an arc-shaped bulge, the plane side is attached to the stator core, and the arc-shaped bulge side faces outwards.

4. The motor stator with insulation structure of claim 3, wherein: the shape of the end insulating plate is consistent with the shape of the axial cross section of the stator core.

5. The motor stator including an insulation structure according to claim 3 or 4, wherein: the end insulating plate is processed by an insulating plate.

6. The motor stator with insulation structure of claim 1, wherein: and the joints of the winding coils are connected according to an electromagnetic design and are led out by the lead-out cable.

7. The motor stator with insulation structure of claim 1, wherein: the inner groove tooth tops are located in the middle of the inner groove, and the inner groove is divided into a first inner groove space close to the outer circumference of the stator core and a second inner groove space close to the inner circumference of the stator core by the inner groove tooth tops.

8. The motor stator with insulation structure of claim 1, wherein: the outer groove tooth point is positioned at the outer groove notch.

9. The motor stator with insulation structure of claim 1, wherein: the number of the inner grooves is 24.

Images