CN211266604U

CN211266604U - Motor stator and motor

Info

Publication number: CN211266604U
Application number: CN201921760207.3U
Authority: CN
Inventors: 徐德才; 郭守仑; 张莉; 韩丹; 田博; 高一; 李全; 尹相睿
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-08-14
Anticipated expiration: 2029-10-18

Abstract

The utility model relates to the field of automotive technology, a motor stator and motor is disclosed. The motor stator includes the iron core and winds the stator winding of establishing on the iron core, a plurality of stator slots have been seted up to the equidistant on the iron core, stator winding is three-phase winding, stator winding every phase is including stator coil group and be used for establishing ties multiunit stator coil group's connection coil group together, two sets of windings of stator coil group both ends after establishing ties form and draw forth the group, every group stator coil group is respectively including many square wires, and the end connection of stator slot and adjacent wire is worn to locate by the one end of wire, the link and the winding of two wires are drawn forth the group and are arranged in same one side. The stator coil group of the motor stator provided by the utility model is formed by connecting a plurality of square wires, which is convenient for winding the square wires on the iron core, thus improving the performance of the motor and reducing the size of the motor; the connecting ends of the two wires and the winding lead-out wire group are arranged on the same side, so that the number of production dies is reduced, and subsequent production is facilitated.

Description

Motor stator and motor

Technical Field

The utility model relates to the field of automotive technology, especially, relate to a motor stator and motor.

Background

With the rapid development of new energy automobile technology, the performance requirement on the motor is higher and higher, the increase of the performance inevitably leads to the increase of the volume of the motor, and the contradiction between the performance and the volume of the motor is increasingly prominent.

The stator winding of the existing motor generally adopts round wires to form coils, and the cross section of the stator winding can be divided into round coils and square coils. Compared with a circular coil, the square coil can effectively improve the slot filling rate of the motor, reduce the copper consumption of the motor, improve the efficiency of the motor, and reduce the height of the end part of a stator winding of the motor, thereby saving the volume of the motor. However, the square coil has high process requirements in the aspects of coil winding and coil unloading, and is inconvenient to implement. Therefore, it is necessary to provide a stator of an electric motor to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor stator and motor makes things convenient for the coiling of square coil and the follow-up production after the off-line, and product quality and uniformity are good.

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

a motor stator comprises an iron core and a stator winding wound on the iron core, wherein a plurality of stator slots are formed in the iron core at equal intervals, the stator winding is a three-phase winding, each phase of the stator winding comprises a stator coil group and a connecting coil group used for connecting a plurality of stator coil groups in series, two ends of the stator coil group after being connected in series form two groups of winding leading-out wire groups, each stator coil group respectively comprises a plurality of square conducting wires, one end of each conducting wire penetrates through the stator slot and is connected with the end part of the adjacent conducting wire, and the connecting ends of the two conducting wires and the winding leading-out wire groups are arranged on the same side.

Preferably, two adjacent wires are connected by welding.

Preferably, the iron core is provided with 48 rectangular stator slots with 4 pole pairs at equal intervals in the circumferential direction.

Preferably, the number q of slots per pole and phase of the three-phase winding is 2, the number of parallel paths is 2, and the slot pitch is 6.

Preferably, each phase of the stator winding comprises two stator coil groups adopting wave winding.

Preferably, the two sets of stator coil sets are wound on the iron core along the same direction.

Preferably, the connection coil group and the winding lead-out wire group respectively include two wires having a square cross section.

Preferably, the stator slots are internally provided with insulating paper matched with the stator slots.

Preferably, the shape of the insulation paper is U-shaped, S-shaped or B-shaped.

An electric motor comprises the motor stator.

The utility model has the advantages that: the stator coil group of the motor stator provided by the utility model is formed by connecting a plurality of square wires, thus reducing the types of the wires, facilitating the winding of the square wires on the iron core, improving the performance of the motor and reducing the size of the motor; the connecting ends of the two wires and the winding lead-out wire group are arranged on the same side, so that the number of production dies is reduced, and the follow-up production is facilitated.

Drawings

Fig. 1 is a schematic structural diagram of a stator core of a motor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a stator winding of a stator of an electric machine according to an embodiment of the present invention;

fig. 3 is a winding schematic diagram of one phase winding of the stator winding according to an embodiment of the present invention.

In the figure:

1. an iron core; 11. a stator slot;

2. a stator winding; 21. a stator coil group; 22. connecting the coil groups; 23. leading out wires; 24. a phase neutral point outgoing line; 25. a connecting end; 26. and a phase coil group.

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. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-3, the present embodiment provides a motor stator, which solves the problems of effectively increasing the slot filling rate of the motor, reducing the copper consumption of the motor to thereby increase the efficiency of the motor, and simultaneously reducing the height of the end of the motor stator winding to thereby save the volume of the motor.

Specifically, this motor stator includes iron core 1 and winds stator winding 2 of establishing on iron core 1, a plurality of stator slots 11 have been seted up to the equidistant of iron core 1, stator winding 2 is the three-phase winding, stator winding 2 is every looks including stator coil group 21 and the connection coil group 22 that is used for establishing ties multiunit stator coil group 21 together, two sets of winding extraction group are formed at the stator coil group 21 both ends after establishing ties, every group stator coil group 21 includes many square wires respectively, and the end connection of stator slot 11 and adjacent wire is worn to locate by the one end of wire, the link 25 of two wires is arranged in same one side with winding extraction group.

The stator coil group 21 of the motor stator provided by the embodiment is formed by connecting a plurality of square conducting wires, so that the types of the conducting wires are reduced, the square conducting wires are conveniently wound on the iron core 1, the performance of the motor is improved, and the size of the motor is reduced; the connecting ends 25 of the two wires and the winding lead-out wire group are arranged on the same side, so that the number of production dies is reduced, and the follow-up production is facilitated.

Specifically, a plurality of axially penetrating stator slots 11 are provided at intervals in the circumferential direction of the core 1 on the radially inner surface of the core 1, and the intervals between adjacent two stator slots 11 are equal. In the present embodiment, the iron core 1 has 48 rectangular stator slots 11 opened at equal intervals in the circumferential direction, and the number of pole pairs is 4. For the stator coil group 21 of the same phase, one winding point is formed by 6 stator slots 11 at intervals in the winding direction from the winding starting point, one turn is formed by every two winding points from the winding starting point, and each stator coil group 21 has 8 turns. Since the stator coil groups 21 respectively include a plurality of square lead wires, each lead wire forms one turn of coil, and each turn of coil is connected end to end from the starting point to form one stator coil group 21. In this embodiment, two adjacent wires are connected through the welded mode, and connection stability and electric conductivity are good, and convenient operation.

In the present embodiment, each phase of the stator winding 2 includes two sets of stator coil groups 21, each set of stator coil groups 21 includes two sets of phase coil groups 26, one end of each of the two sets of phase coil groups 26 is connected by one set of connecting coil group 22, the other end of each of the two sets of phase coil groups 26 forms a winding lead-out line group, and each set of phase coil groups 26 is formed by welding a plurality of wires. The winding lead-out line group includes a phase lead-out line 23 and a phase neutral point lead-out line 24.

In the present embodiment, the stator winding 2 includes two phase lead-out lines 23 and two phase neutral point lead-out lines 24 per phase. Wherein the phase leading-out wire 23 and the neutral point leading-out wire 24 are both wires with square cross sections. The connecting coil group 22 is also a wire with a square cross section, so that the performance of the motor is further improved, the volume of the motor is reduced, and the realization is convenient. In this embodiment, this motor stator only needs the square conductor of two kinds of different sizes, has reduced the type that uses the wire among the motor stator, and then has reduced the quantity of production mould, the subsequent production of being convenient for.

In this embodiment, two sets of stator coil groups 21 are wound on the iron core 1 along the same direction, and the stator coil groups 21 are wound in a wave winding manner, so that the performance of the motor is further improved, and the stator is suitable for winding a square conducting wire, and the slot filling rate of the stator slot 11 is improved.

In this embodiment, insulating paper may be further placed in the stator slot 11, the insulating paper may be matched with the stator slot 11, and the insulating paper may not be placed in the stator slot 11. The shape of the insulating paper may be one of a U-shape, an S-shape and a B-shape.

It is obvious that the above embodiments of the present invention are only 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. The motor stator is characterized by comprising an iron core (1) and stator windings (2) wound on the iron core (1), wherein a plurality of stator slots (11) are formed in the iron core (1) at equal intervals, the stator windings (2) are three-phase windings, each phase of each stator winding (2) comprises a stator coil group (21) and a connecting coil group (22) used for serially connecting a plurality of stator coil groups (21), two ends of each serially connected stator coil group (21) form two groups of winding leading-out wire groups, each group of stator coil group (21) respectively comprises a plurality of square conducting wires, one end of each conducting wire penetrates through the stator slot (11) to be connected with the end of the adjacent conducting wire, and the connecting ends (25) of the two conducting wires and the winding leading-out wire groups are arranged on the same side.

2. The stator according to claim 1, wherein two adjacent wires are connected by welding.

3. Stator for an electric machine according to claim 1, characterized in that the core (1) is provided with 48 rectangular stator slots (11) equally spaced in the circumferential direction, the number of pole pairs being 4.

4. The stator of claim 1, wherein the number q of slots per pole per phase of the three-phase winding is 2, the number of parallel paths is 2, and the slot pitch is 6.

5. The electric machine stator according to claim 1, characterized in that each phase of the stator winding (2) comprises two sets of stator coil sets (21) using wave winding.

6. The stator for an electric machine according to claim 5, wherein two sets of the stator coil sets (21) are wound in the same direction on the core (1).

7. The electric machine stator according to claim 1, characterized in that the connection coil group (22) and the winding lead-out wire group each include two wires having a square cross section.

8. The stator according to claim 1, wherein the stator slots (11) are provided with insulation paper matching the stator slots (11).

9. The stator for an electric machine according to claim 8, wherein the shape of the insulating paper is U-shaped, S-shaped, or B-shaped.

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