CN111697718A

CN111697718A - Stator for permanent magnet motor and permanent magnet motor

Info

Publication number: CN111697718A
Application number: CN201910824384.1A
Authority: CN
Inventors: 沈宜敏; 孙即明; 杜爱娟; 宋承林; 尚衍飞; 何显能; 刘辉
Original assignee: Qingdao CCS Electric Corp
Current assignee: Qingdao CCS Electric Corp
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-09-22

Abstract

The invention discloses a stator for a permanent magnet motor and the permanent magnet motor. The stator for the permanent magnet motor comprises a stator core and a winding; the inner surface of the stator core is provided with a plurality of groove structures, the winding is arranged in the groove structures, positioning inserting strips are further arranged at the opening of the groove structures, and the positioning inserting strips abut against the winding. Through installing the location cutting in stator core's slot structure opening, the location cutting is located the outside of winding and fixes a position the winding to stop that the winding breaks away from out from the opening of slot structure, improve permanent-magnet machine's reliability.

Description

Stator for permanent magnet motor and permanent magnet motor

Technical Field

The invention relates to a motor, in particular to a stator for a permanent magnet motor and the permanent magnet motor.

Background

The motor is a common electrical component in industrial production, wherein the permanent magnet motor is widely applied to industrial production due to high efficiency and small volume. Permanent magnet machines typically include a stator with winding coils disposed thereon and a rotor with permanent magnets disposed thereon. In the prior art, a stator in a permanent magnet motor adopts a structural form that a stator core is matched with a winding, and a groove is formed in the stator core to place the winding. However, the coils of the windings are easily pulled from the stator core during actual use, resulting in low reliability in use. The invention aims to solve the technical problem of how to design a permanent magnet motor with high use reliability.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the stator for the permanent magnet motor and the permanent magnet motor are provided, and the stator core is prevented from being separated from a winding in the stator through the positioning inserting bars, so that the use reliability of the permanent magnet motor is improved.

The technical scheme provided by the invention is that the stator for the permanent magnet motor comprises a stator core and a winding; the inner surface of the stator core is provided with a plurality of groove structures, the winding is arranged in the groove structures, positioning inserting strips are further arranged at the opening of the groove structures, and the positioning inserting strips abut against the winding.

Furthermore, the cross section of the groove structure is of a trapezoidal structure, and the cross section of the positioning inserting strip is also of a trapezoidal structure.

Further, the stator core comprises a plurality of layers of first mounting pieces which are sequentially connected together, and a plurality of tooth structures are arranged on the inner circumference of each first mounting piece around the axis of the first mounting piece; the tooth structures located at the same circumferential position are sequentially stacked together along the axial direction of the first mounting piece to form a winding portion on which a cable of the winding is wound.

Furthermore, a plurality of fastening holes are formed in the first mounting plate along the direction of the outer periphery, the fastening holes are coaxially arranged and are communicated with each other to form fastening channels, double-headed bolts are inserted into the fastening channels, and fastening nuts are connected to the end portions of the double-headed bolts in a threaded mode.

Furthermore, the outer periphery of the first mounting piece is provided with a plurality of positioning notches which are arranged in a collinear manner and communicated with each other to form a positioning groove.

Furthermore, the first installation piece comprises a plurality of first arc-shaped pieces, the first arc-shaped pieces are sequentially connected in a butt joint mode to form the first installation piece, and each first arc-shaped piece is provided with the tooth structure and the fastening hole.

Further, the two first mounting pieces which are abutted together abut against each other, wherein the first arc-shaped piece in one first mounting piece is abutted against the two first arc-shaped pieces which are abutted together in the other first mounting piece.

Furthermore, the tooth structure extends towards the direction of the circle center of the first mounting piece, and the groove structure is formed between every two adjacent winding parts.

Further, the winding is a flat copper wire wound around the winding portion, and adjacent flat copper wires are stacked together.

The invention also provides a permanent magnet motor which comprises a rotor and the stator.

Compared with the prior art, the invention has the advantages and positive effects that: according to the stator for the permanent magnet motor, the positioning inserting strips are arranged in the slot structure openings of the stator core and positioned on the outer sides of the windings to position the windings, so that the windings are prevented from being separated from the slot structure openings, and the reliability of the permanent magnet motor is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a permanent magnet motor according to the present invention;

fig. 2 is a cross-sectional view of a permanent magnet electric machine according to the present invention;

fig. 3 is an exploded view of a permanent magnet motor according to the present invention;

FIG. 4 is an exploded view of the stator of the present invention;

FIG. 5 is an enlarged view of a portion of area A of FIG. 4;

fig. 6 is an exploded view of the stator core.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, the permanent magnet motor of the present embodiment includes a motor main body 100, a frequency conversion module 200, and a water cooling plate 300, wherein the motor main body 100 includes a stator 1, a rotor 2, and a housing 3, the stator 1 and the rotor 2 are installed in the housing 3, the frequency conversion module 200 is installed on the housing 3 through the water cooling plate 300, a water flow channel is formed in the water cooling plate 300, and cooling water flows into the water flow channel of the water cooling plate 300 to dissipate heat of the motor main body 100 and the frequency conversion module 200.

The following structural improvements of the stator 1 are described with reference to the drawings.

As for the stator 1, as shown in fig. 4 to 6, the stator 1 includes a stator core 11 and a winding 12; the inner surface of the stator core 11 is provided with a plurality of slot structures 110, the winding 12 is arranged in the slot structures 110, the opening of the slot structures 110 is further provided with a positioning insertion strip 13, and the positioning insertion strip 13 abuts against the winding 12. Specifically, for the winding 12, it is common to use a cable that is wound around the positioning core and is located in the slot structure 110. In the actual use process, the wound cable is loosened under the influence of the operation vibration of the permanent magnet motor, and the positioning insert 13 is arranged at the opening of the slot structure 110, so that the winding 12 is positioned and limited in the slot structure 110 by the positioning insert 13. In this way, in the actual use process, even if the cable of the winding 12 is loosened due to the vibration generated by the permanent magnet motor, the winding can be prevented from being separated from the opening of the slot structure 110 under the action of the positioning insertion strip 13, so that the use reliability is improved. And the winding quality improving winding 12 for the convenient and rapid winding is that the winding 12 is a flat copper wire wound on the winding part and adjacent flat copper wires are stacked together.

The cross section of the groove structure 110 is a trapezoid structure, and the cross section of the positioning insert 13 is also a trapezoid structure. In the actual assembly process, after the winding 12 is placed in the slot structure 110, the positioning slips 13 are inserted into the slot structure 110 and positioned outside the winding 12. Positioning the slip 13 will cause the winding 12 to compact in the slot structure 110. Preferably, a spacer 14 is further disposed in the slot structure 110, and the winding 12 is sandwiched between two spacers 14, so that the two spacers 14 can protect the winding 12 during the process of inserting the positioning insert 13 into the slot structure 110, thereby improving the assembly quality.

Further, in order to improve the assembly efficiency and accuracy of the stator core 11, the stator core 11 includes a plurality of layers of first mounting pieces 111 connected together in sequence, and an inner circumference of the first mounting pieces 111 is provided with a plurality of tooth structures 112 around an axis thereof; the tooth structures 112 located at the same circumferential position are stacked in order in the axial direction of the first mounting piece 111 to form winding portions, and a groove structure 110 is formed between two adjacent winding portions, on which the wire of the winding 12 is wound. Specifically, stator core 11 adopts the mode processing that the first installation piece 111 of multi-disc superposes together to form, and every first installation piece 111's structural dimension is the same, like this, alright with the stator core 11 of setting for suitable size and specification as required to, can guarantee that stator core 11's machined dimension keeps unanimous, with improvement packaging efficiency and precision. The tooth structure 112 extends towards the center of the first mounting piece 111, and a groove structure 110 with a trapezoidal cross section is formed between two adjacent winding portions.

In order to fasten the first mounting piece 111 in multiple layers, a plurality of fastening holes 113 are formed in the first mounting piece 111 along the outer circumferential direction, the plurality of fastening holes 113 coaxially arranged and communicating with each other form a fastening passage, a stud bolt 112 is inserted into the fastening passage, and a fastening nut (not shown) is screwed to an end portion of the stud bolt 112. Specifically, in the process of stacking multiple layers of first mounting pieces 111 together, each layer of first mounting piece 111 is correspondingly mounted on the stud bolt 112, the stud bolt 112 is correspondingly inserted into the fastening hole 113, and the stud bolt 112 further performs the assembling and positioning functions. Simultaneously, the outer periphery of first installation piece 111 still is provided with a plurality of location breach 114, and the collineation is arranged and a plurality of location breach 114 that communicate each other form positioning groove (not mark), positioning groove that the outer periphery of location iron core formed will the location iron core is installed in the in-process in the shell, it is corresponding, be provided with the gib block on the inner wall of shell, slide in the gib block and insert in the positioning groove. The stator core 11 can be conveniently and accurately assembled in the shell by configuring the positioning groove, so that the assembly precision and efficiency are improved.

Further, the first mounting piece 111 includes a plurality of first arc-shaped pieces 1111, the first arc-shaped pieces 1111 are sequentially butted together to form the first mounting piece 111, and each first arc-shaped piece 1111 is provided with a tooth structure 112 and a fastening hole 113. Specifically, first installation piece 111 adopts a plurality of first arc pieces 1111 to link together in proper order with cyclic annular trend, like this, alright reduce the machining dimension of the first installation piece 111 of individual layer, the effectual degree of difficulty that reduces processing. Preferably, for two first mounting pieces 111 abutting together, the first arc-shaped piece 1111 in one first mounting piece 111 abuts against the two first arc-shaped pieces 1111 butted together in the other first mounting piece 111. Specifically, the first arc-shaped pieces 1111 of the two adjacent layers of the first mounting pieces 111 are arranged in a staggered manner. The first arc piece 1111 of dislocation arrangement can be effectual increase in two-layer first installation piece 111 lean on the restriction constraint between the first arc piece 1111 together for each first arc piece 1111's atress is more even, and overall structure intensity is higher.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A stator for a permanent magnet motor is characterized by comprising a stator core and a winding; the inner surface of the stator core is provided with a plurality of groove structures, the winding is arranged in the groove structures, positioning inserting strips are further arranged at the opening of the groove structures, and the positioning inserting strips abut against the winding.

2. The stator for permanent magnet motor according to claim 1, wherein the slot structure has a trapezoidal structure in cross section, and the positioning insertion bar has a trapezoidal structure in cross section.

3. The stator for the permanent magnet motor according to claim 1, wherein the stator core comprises a plurality of layers of first mounting pieces which are sequentially connected together, and the inner circumference of each first mounting piece is provided with a plurality of tooth structures around the axis thereof; the tooth structures located at the same circumferential position are sequentially stacked together along the axial direction of the first mounting piece to form a winding portion on which a cable of the winding is wound.

4. The stator for the permanent magnet motor according to claim 3, wherein a plurality of fastening holes are provided in the first mounting plate in the direction of the outer peripheral ring, the plurality of fastening holes coaxially arranged and communicating with each other form a fastening passage, a stud bolt is inserted into the fastening passage, and a fastening nut is threadedly connected to an end portion of the stud bolt.

5. The stator for the permanent magnet motor according to claim 3, wherein the outer peripheral ring of the first mounting piece is further provided with a plurality of positioning notches, and the plurality of positioning notches arranged in a line and communicated with each other form a positioning groove.

6. The stator as claimed in claim 3, wherein the first mounting plate comprises a plurality of first arc-shaped pieces, the first arc-shaped pieces are sequentially butted together to form the first mounting plate, and each first arc-shaped piece is provided with the tooth structure and the fastening hole.

7. The stator as claimed in claim 6, wherein the two first mounting pieces abut against each other, and the first arc-shaped piece of one of the first mounting pieces abuts against the two first arc-shaped pieces of the other first mounting piece abutting against each other.

8. The stator as claimed in claim 3, wherein the tooth structure extends toward a center of the first mounting plate, and the slot structure is formed between two adjacent winding portions.

9. The stator for the permanent magnet motor according to claim 1, wherein the winding is a flat copper wire wound around the winding portion, and adjacent flat copper wires are stacked together.

10. A permanent magnet machine comprising a rotor and further comprising a stator according to any of claims 1-9.