CN218335492U

CN218335492U - Motor stator and motor

Info

Publication number: CN218335492U
Application number: CN202123285393.XU
Authority: CN
Inventors: 糜鹏
Original assignee: Sanden Huayu Automotive Air Conditioning Co Ltd
Current assignee: Sanden Huayu Automotive Air Conditioning Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2023-01-17
Anticipated expiration: 2031-12-24

Abstract

The utility model relates to the technical field of electric machine, a motor stator and motor is specifically disclosed. The utility model provides a motor stator includes stator inner circle, stator outer lane and insulating skeleton, and insulating skeleton includes first skeleton and second skeleton, and the first terminal surface of first skeleton overlaps with the first terminal surface part of second skeleton and sets up, under the prerequisite that keeps current motor size, does not influence the inslot wire winding area, has increased the insulating distance between each conductive parts adjacent parts such as stator core and stator coil; an insulating part is arranged between the second end surface of the first framework and the second end surface of the second framework and the outer ring of the stator, so that creepage paths between adjacent parts of various conductive parts such as a stator core and a stator coil are extended or interrupted, and the creepage distances meet the requirements; the utility model provides a motor stator is maintaining conventional motor size, not sacrificing under the prerequisite that the inslot can wind the wire area, has promoted the withstand voltage performance of motor.

Description

Motor stator and motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a motor stator and motor.

Background

Currently, due to the demand for fast charging of electric vehicles, more and more host plants select electric compressor motors with ultra-high voltage application ranges up to 1000V, and therefore, the requirement for withstand voltage of the electric compressor motors is very high. The requirements regarding the dielectric withstand voltage generally relate to an air gap, which is the shortest distance in air between two conductive members, or a creepage distance, which is the shortest distance along the surface of the insulating material between these two conductive members. For example, for an electric compressor motor having a voltage range of 751V to 1000V, a creepage distance is required to be 13mm (UL) and an air gap is required to be 10mm (UL).

Whereas for previously known conventional motors (-400V) the shortest distance in air between the two conductive parts is about 1.6mm and the shortest creepage distance is about 2.4mm. For the automobile industry, especially when the voltage exceeds this range, it is a technical problem to improve the insulation voltage resistance of the motor without sacrificing the winding area in the slot while maintaining the conventional size of the motor for the ultra-high voltage motor up to 751V-1000V.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor stator, but maintaining conventional motor size, not sacrificing under the prerequisite of inslot wire winding area, promoted the withstand voltage performance of motor.

To achieve the purpose, the utility model adopts the following technical proposal:

an electric machine stator comprising:

the outer side of the stator inner ring is circumferentially provided with a plurality of tooth parts;

the stator outer ring is coaxially arranged outside the stator inner ring;

insulating skeleton, including first skeleton and second skeleton, first skeleton with the second skeleton sets up in turn in a plurality of on the tooth portion, just the first terminal surface of first skeleton with the first terminal surface part coincide of second skeleton, the second terminal surface of first skeleton with the second terminal surface of second skeleton with all be equipped with the insulator between the stator outer lane.

As an optimal technical scheme of the motor stator, the circumferential side surface of the first framework is concave, the middle part of the circumferential side surface of the first framework is provided with a first through hole for the tooth part to penetrate through, and a coil is arranged at the concave position.

As an optimal technical scheme of the motor stator, the circumferential side surface of the second framework is concave, the middle part of the circumferential side surface of the second framework is provided with a second through hole for the tooth part to penetrate, and a coil is arranged at the concave position.

As foretell motor stator's a preferred technical scheme, the relative both sides of first terminal surface of first skeleton are outwards extended there is the first board, just the ladder board of first board for being equipped with first step face.

As an above-mentioned motor stator's a preferred technical scheme, the both sides that first terminal surface is relative of second skeleton extend outward and have the second board, just the ladder board of second step face is for being equipped with to the second board, the second step face with the laminating of first step face.

As a preferred technical solution of the above-mentioned motor stator, two opposite sides of the second end face of the first skeleton extend outwards to form a third plate, the third plate is a stepped plate provided with a third stepped surface, and the insulating member is arranged between the third stepped surface and the stator outer ring.

As an optimal technical scheme of foretell motor stator, the both sides that the second terminal surface of second skeleton is relative outwards extend and have the fourth board, the stepped plate of fourth board for being equipped with the fourth step face, the fourth step face with be equipped with between the stator outer lane the insulating part.

As an optimal technical scheme of the motor stator, the insulating part is V-shaped, the insulating part is disposed between the first framework and the second framework, and two ends of the insulating part are bent and disposed between the first framework and the stator outer ring and between the second framework and the stator outer ring.

As a preferable technical solution of the above motor stator, the insulating member includes insulating paper.

An object of the utility model is to provide a motor still accords with to the current requirement of insulating installation complex under various voltage levels to can realize the minimizing of motor size simultaneously.

an electrical machine comprising an electrical machine stator as claimed in any preceding claim.

The utility model has the advantages that:

the utility model provides a motor stator, the first terminal surface of first skeleton partially overlaps with the first terminal surface of second skeleton and sets up, under the prerequisite that maintains current motor size, does not influence the inslot wire winding area, has increased the insulating distance between each conductive parts adjacent parts such as stator core and stator coil; an insulating piece is arranged between the second end surface of the first framework and the second end surface of the second framework and the outer ring of the stator, so that creepage paths between adjacent parts of various conductive parts such as a stator core and a stator coil are extended or interrupted, and the specified creepage distances are met; the utility model provides a motor stator is maintaining conventional motor size, not sacrificing under the prerequisite that the inslot can wind the wire area, has promoted the withstand voltage performance of motor.

The utility model provides a motor accords with under various voltage levels to the current requirement of insulating installation complex to can realize motor size's minimizing simultaneously, but not influence the wire-wound area of stator inslot, in addition, can also ensure the abundant cooling of stator.

Drawings

Fig. 1 is a schematic structural diagram of a motor stator provided by an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a first framework provided in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a second framework provided in the embodiment of the present invention;

FIG. 5 is a schematic view of a portion B of FIG. 2;

fig. 6 is a partially enlarged schematic view at C of fig. 2.

In the figure:

1. a stator inner ring; 2. a tooth portion; 3. a stator outer ring; 5. an insulating member;

41. a first skeleton; 411. a first through hole; 412. a first plate; 413. a first step surface; 414. a third plate; 415. a third step surface;

42. a second skeleton; 421. a second through hole; 422. a second plate; 423. a second step surface; 424. a fourth plate; 425. a fourth step surface;

43. and a coil.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the prior art, for the automobile industry, the present embodiment provides a motor stator and a motor to solve the above problems, in order to solve the above problems, in the case of a motor with an ultra-high voltage as high as 751V to 1000V, especially when the voltage exceeds this range, how to improve the insulation and voltage resistance of the motor on the premise of maintaining the conventional motor size and not sacrificing the winding area in the slot.

Specifically, as shown in fig. 1, the motor stator provided by the present embodiment includes a stator inner ring 1, a plurality of teeth 2 are circumferentially provided on an outer side of the stator inner ring 1, and a stator outer ring 3 is coaxially provided on an outer side of the stator inner ring 1. The inside wall of stator outer lane 3 is equipped with a plurality of draw-in grooves along circumference, and when stator outer lane 3 was installed in the 1 outside of stator inner lane, the tip of tooth portion 2 was arranged in the corresponding draw-in groove, then the pressfitting, has realized being connected of stator outer lane 3 and stator inner lane 1.

As shown in fig. 2, each tooth portion 2 is provided with an insulating skeleton, specifically, the insulating skeleton includes a first skeleton 41 and a second skeleton 42, and the first skeleton 41 and the second skeleton 42 are alternately disposed on the plurality of tooth portions 2, that is, two adjacent first skeletons 41 are disposed one tooth portion 2 apart, and the second skeleton 42 is disposed on the tooth portion 2. The first end face of the first framework 41 is partially overlapped with the first end face of the second framework 42, so that the insulation distance between adjacent parts of each conductive component such as a stator core and a stator coil is increased on the premise of maintaining the size of the conventional motor and not influencing the winding area in a slot; the insulating members 5 are provided between the second end surfaces of the first and

second bobbins

41 and 42 and the stator outer ring 3, so that a creepage path between adjacent parts of respective conductive members, such as the stator core and the stator coil, is extended or interrupted, in conformity with a prescribed creepage distance. The motor stator provided by the embodiment improves the insulation and voltage resistance of the motor on the premise of maintaining the size of a conventional motor and not sacrificing the winding area in the slot.

In the present embodiment, as shown in fig. 3, the circumferential side surface of the first frame 41 is recessed, and the middle portion is provided with a first through hole 411 for the tooth portion 2 to pass through, and the recessed position is provided with the coil 43. Alternatively, the cross-sectional shape of the first bobbin 41 is rectangular, the two ends of the first through hole 411 are a first end surface and a second end surface, and four side surfaces of the first bobbin 41 are recessed for a metal wire to be wound to form the coil 43, and the metal wire is preferably a copper wire. The cross-sectional shape of the first through hole 411 is the same as the cross-sectional shape of the tooth 2, and for convenience of processing, the cross-sectional shape of the first through hole 411 and the cross-sectional shape of the tooth 2 are rectangular in this embodiment.

As shown in fig. 4, the second frame 42 has a structure substantially the same as that of the first frame 41, the circumferential side surface of the second frame 42 is recessed, the middle portion of the second frame is provided with a second through hole 421 for the tooth portion 2 to pass through, and the recessed position is provided with a coil 43. Alternatively, the cross-sectional shape of the second frame 42 is rectangular, the two ends of the second through hole 421 are a first end surface and a second end surface, and the four side surfaces of the second frame 42 are recessed for the metal wire to be wound to form the coil 43, and the metal wire is preferably a copper wire. The cross-sectional shape of the second through hole 421 is the same as the cross-sectional shape of the tooth 2, and in this embodiment, the cross-sectional shape of the second through hole 421 and the cross-sectional shape of the tooth 2 are rectangular for ease of processing.

As shown in fig. 2 and 5 in combination, the first end face of the first bobbin 41 overlaps the first end face portion of the second bobbin 42 to increase the insulation distance between the adjacent portions of the respective conductive members, such as the stator core and the stator coil, without increasing the overall size of the motor. Specifically, in the present embodiment, first plates 412 extend outwards from two opposite sides of the first framework 41, the first plates 412 are stepped plates provided with first stepped surfaces 413, and the first plates 412 are used for being overlapped with the first end surfaces of the second framework 42.

Corresponding to the structure of the first frame 41, the two opposite sides of the second frame 42 extend outwards to form second plates 422, the second plates 422 are stepped plates provided with second stepped surfaces 423, and the second stepped surfaces 423 are attached to the first stepped surfaces 413, so that the first end surfaces of the first frame 41 and the second end surfaces of the second frame 42 are partially overlapped, the insulation distance between adjacent parts of various conductive components such as a stator core and a stator coil is increased, the overall size of the motor is not affected, the structure is simple, and the realization is easy.

In this embodiment, the first step surface 413 of the first plate 412 is disposed away from the center of the stator inner ring 1, and the second step surface 423 of the second plate 422 is disposed toward the center of the stator inner ring 1, and they may be stacked. Of course, the directions in which the first step surface 413 and the second step surface 423 are provided may be opposite to those described above, and are not particularly limited herein. The overlapping area of the first step surface 413 and the second step surface 423 is set according to actual design requirements, and is not particularly limited herein.

Referring to fig. 2 and 6, an insulating member 5 is disposed between the second end surfaces of the first bobbin 41 and the second bobbin 42 and the stator outer ring 3, and when the stator outer ring 3 is connected to the stator inner ring 1, in order to prevent an increase in the radial dimension of the motor and to enable a creepage path between adjacent portions of each conductive member to be extended or interrupted, in the present embodiment, third plates 414 extend outward from opposite sides of the second end surface of the first bobbin 41, the third plates 414 are stepped plates provided with third stepped surfaces 415, the third stepped surfaces 415 are disposed toward an inner side wall of the stator outer ring 3, and the insulating member 5 is disposed between the third stepped surfaces 415 and the stator outer ring 3.

The arrangement mode of the insulating part 5 between the second end face of the second framework 42 and the stator outer ring 3 is the same as the arrangement mode of the insulating part 5 between the second end face of the first framework 41 and the stator outer ring 3, the two opposite sides of the second end face of the second framework 42 are outwards extended with fourth plates 424, the fourth plates 424 are stepped plates provided with fourth stepped surfaces 425, and the insulating part 5 is arranged between the fourth stepped surfaces 425 and the stator outer ring 3. The provision of the insulating member 5 enables the creepage path between adjacent portions of the respective conductive members to be extended or interrupted without increasing the radial dimension of the machine.

The areas of the third step surface 415 and the fourth step surface 425 determine the area of the insulating member 5 disposed between the first bobbin 41 and the stator outer ring 3 and between the second bobbin 42 and the stator outer ring 3, and therefore, the sizes of the third step surface 415 and the fourth step surface 425 are set according to actual design requirements, and are not particularly limited herein.

In this embodiment, in order to facilitate fixing of the insulating member 5, the insulating member 5 is disposed in a V shape, the insulating member 5 is disposed between the first frame 41 and the second frame 42 which are adjacent to each other, two ends of the insulating member 5 are bent and disposed between the first frame 41 and the stator outer ring 3, and the second frame 42 and the stator outer ring 3, that is, one end of the V-shaped insulating member 5 is bent and attached to the third step surface 415, and the other end is bent and attached to the fourth step surface 425. The insulating member 5 extends towards the stator inner ring 1 and abuts against the first end face of the first framework 41 or the second framework 42, and the adjacent coil 43 of the first framework 41 and the coil 43 of the second framework 42 are insulated by the insulating member 5, so that a creepage path between the coil 43 of the first framework 41 and the coil 43 of the second framework 42 is extended or interrupted, the insulating effect can be further improved, and the insulation and voltage resistance performance of the motor is met.

The insulating member 5 includes insulating paper, is thin, and has insulating properties. In this embodiment, the material of the insulating paper is preferably polyethylene terephthalate. The insulating framework is preferably made of polyphenylene sulfide, polytetrafluoroethylene or epoxy resin. The insulating paper and the insulating framework are made of appropriate insulating materials respectively, and the insulating paper and the insulating framework are matched to be used, so that the propagation of creepage current can be effectively inhibited, and the insulating and voltage-resisting performance of the motor is further improved. Of course, the material of the insulating paper and the material of the insulating frame are not limited to those listed above, and are not particularly limited herein.

The embodiment also provides a motor, which comprises the motor stator.

The motor having the motor stator is used to drive an electric compressor on an automobile, and in a hermetic electric compressor, the motor stator can completely meet the existing requirements for insulation mounting fitting in known standards with respect to IEC, UL and DIN at various voltage levels, and at the same time, can achieve a minimization of the motor size, and in addition, can ensure sufficient cooling of the stator.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An electric machine stator, comprising:

the stator comprises a stator inner ring (1), wherein a plurality of tooth parts (2) are arranged on the outer side of the stator inner ring (1) in the circumferential direction;

the stator outer ring (3) is coaxially arranged outside the stator inner ring (1);

insulating skeleton, including first skeleton (41) and second skeleton (42), first skeleton (41) with second skeleton (42) set up in turn in a plurality of on tooth portion (2), just the first terminal surface of first skeleton (41) with the first terminal surface part coincide of second skeleton (42), the second terminal surface of first skeleton (41) with the second terminal surface of second skeleton (42) with all be equipped with insulating part (5) between stator outer lane (3).

2. The motor stator according to claim 1, wherein the circumferential side of the first frame (41) is recessed, the middle of the first frame is provided with a first through hole (411) for the tooth (2) to pass through, and a coil (43) is arranged at the recessed position.

3. The motor stator according to claim 1, wherein the circumferential side of the second frame (42) is concave, the middle of the second frame is provided with a second through hole (421) for the tooth (2) to pass through, and a coil (43) is arranged at the concave position.

4. The stator of an electric motor according to claim 1, wherein first plates (412) extend outward from opposite sides of the first end surface of the first bobbin (41), and the first plates (412) are stepped plates provided with first step surfaces (413).

5. The motor stator according to claim 4, wherein two opposite sides of the first end face of the second framework (42) are extended with second plates (422), and the second plates (422) are stepped plates provided with second stepped faces (423), and the second stepped faces (423) are attached to the first stepped faces (413).

6. The motor stator according to claim 1, wherein third plates (414) extend outwards from two opposite sides of the second end surface of the first framework (41), the third plates (414) are stepped plates provided with third stepped surfaces (415), and the insulating member (5) is arranged between the third stepped surfaces (415) and the stator outer ring (3).

7. The stator of an electric machine according to claim 1, wherein the second end face of the second framework (42) extends outwardly from two opposite sides to form fourth plates (424), the fourth plates (424) are stepped plates provided with fourth stepped faces (425), and the insulating member (5) is arranged between the fourth stepped faces (425) and the stator outer ring (3).

8. The motor stator according to claim 1, wherein the insulator (5) is V-shaped, the insulator (5) is disposed between the first frame (41) and the second frame (42) which are adjacent to each other, and two ends of the insulator (5) are bent and disposed between the first frame (41) and the stator outer ring (3) and between the second frame (42) and the stator outer ring (3).

9. The machine stator according to claim 1, characterized in that the insulation (5) comprises insulating paper.

10. An electrical machine comprising an electrical machine stator according to any of claims 1-9.