CN215580583U

CN215580583U - Concentrated winding stator core of traction machine

Info

Publication number: CN215580583U
Application number: CN202121505395.2U
Authority: CN
Inventors: 吴骏; 钱士亮; 钦小铭; 邵佳伟
Original assignee: Zhejiang Mato Drive Equipment Co ltd
Current assignee: Zhejiang Mato Drive Equipment Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-01-18
Anticipated expiration: 2031-07-05

Abstract

The utility model discloses a concentrated winding stator core of a traction machine, which comprises an iron core (1) and windings, wherein the iron core (1) is of an integral structure, the windings are concentrated windings, the windings comprise four paths of parallelly-connected A-phase windings, the four paths of A-phase windings are uniformly distributed on the iron core (1), two sides of the A-phase windings are respectively provided with a B-phase winding and a C-phase winding, the four paths of B-phase windings are parallelly connected, and the four paths of C-phase windings are parallelly connected; the stator core adopts 36-slot 32-level slot matching ratio and spans 1, and the A-phase winding, the B-phase winding and the C-phase winding are all wound and sequentially span three slots of the core (1). The utility model has the advantages of lower production cost, lower noise and higher production efficiency.

Description

Concentrated winding stator core of traction machine

Technical Field

The utility model belongs to the field of stator cores of traction machines, and particularly relates to a concentrated winding stator core of a traction machine.

Background

The stator core of the existing traction machine comprises a winding and an iron core, a 36-slot 32-level slot matching ratio is adopted, the winding is a three-phase double-layer lap-wound distributed winding, as shown in fig. 2, an enameled wire of the winding spans from the upper part of a certain slot to the lower part of another slot, the end size H (the length of the winding end part exceeding the end surface of the iron core) of the winding can be increased according to the increase of the span, even if the span (such as span 1) which is as small as possible is adopted, the end size of the winding can be only reduced to about 25mm at the lowest due to lap-winding between the enameled wires, the end size is overlarge, but the enameled wire on the end part (i.e. the enameled wire exceeding the end surface part of the iron core) does not have an effect on the electromagnetic performance of the stator core, and the end size is overlarge, so that the enameled wire is wasted, and the production cost of the stator core is high.

The iron core of current stator core is for piecing together the block formula structure, like a split type concentrated winding permanent magnetism synchronous traction machine stator of publication No. CN210327166U, is formed by a plurality of iron core piece concatenations, and the accumulative error that the concatenation formed is big, and the size precision that leads to the iron core is relatively poor, leads to the vibration noise to produce because of iron core size precision error easily, and the overall structure intensity of iron core is relatively poor, under the operating condition, easy resonance and collision each other between the iron core piece also can produce the noise. In addition, in the conventional stator core, the winding is wound on the core blocks, the core blocks are spliced, the windings on the core blocks are connected according to A, B, C three phases, each phase is led out after the connection is completed, the required connection frequency is N-2, N is the number of core slots, and when N is 36, the connection frequency reaches 34 times, so that much connection time is required, and the production efficiency of the stator core is low.

Therefore, the existing stator core has the defects of higher production cost, higher noise and lower production efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a concentrated winding stator core of a traction machine. The utility model has the advantages of lower production cost, lower noise and higher production efficiency.

The technical scheme of the utility model is as follows: the utility model provides a tractor concentrated winding stator core, includes iron core and winding, the iron core is monolithic structure, the winding is concentrated winding, the winding includes the parallelly connected A looks winding of four ways, and four ways A looks winding evenly distributed is on the iron core, and the wire both sides of A looks are equipped with B looks winding and C looks winding respectively, and four ways B looks winding is parallelly connected, and four ways C looks winding is parallelly connected. The integral structure means that the iron core is not spliced in the radial direction, but can be formed in an iron sheet stacking mode in the axial direction.

In the concentrated winding stator core for the hoisting machine, the stator core adopts a 36-slot 32-level step slot matching ratio and has a span of 1, and the a-phase winding, the B-phase winding and the C-phase winding are all wound to sequentially span three slots of the core.

In the concentrated winding stator core of the traction machine, paraffin layers are arranged on the outer sides of the phase A winding, the phase B winding and the phase C winding, and the thickness of each paraffin layer is 0.02-0.03 mm.

Compared with the prior art, the stator core is improved on the basis of the existing stator core, and the main improvement is that concentrated windings are adopted, so that the winding form of the windings is changed from the existing up-down type slot spanning structure into a left-right type slot spanning structure, which is determined by different winding forms of distributed windings and concentrated windings, at the moment, the end part size of the windings can be reduced to be less than 10mm, the end part size is reduced, the using amount of enameled wires is reduced, and the production cost of the stator core is reduced. Second, iron core have adopted monolithic structure, do not have the concatenation, lead to the size precision of iron core good, are difficult to produce vibration noise, and the overall structure intensity of iron core is better, and under the operating condition, difficult resonance produces the noise. The existing iron core adopts a splicing type structure, firstly, the winding is carried out on the iron core block, then the splicing of the iron core block is completed, the structure of the stator iron core is compact, the remained winding space is small, the traditional winding equipment cannot complete the winding on the integral winding iron core, an applicant finds a new winding equipment (a winding machine produced by the Seiko Ministry of the Seiko in Zhejiang province) and can complete the winding on the integral winding iron core, therefore, the spliced iron core is improved into the integral iron core, the fly-fork type winding is adopted on the integral iron core, the winding is formed, the wiring times are reduced, the number of times can be reduced to 1 time at most, the manual wiring time is greatly reduced, and the production efficiency of the iron core is improved. The winding of the utility model is of a three-phase structure, each phase is four-way parallel connection (two-way parallel connection in the prior art), and the structure is also beneficial to reducing the noise. Therefore, the utility model has the advantages of lower production cost, lower noise and higher production efficiency.

Drawings

Fig. 1 is a schematic top view of the present invention.

Fig. 2 is a winding diagram of a distributed winding of a conventional stator core.

Fig. 3 is a noise contrast graph.

The labels in the figures are: 1-iron core.

Detailed Description

The utility model is further illustrated by the following figures and examples, which are not to be construed as limiting the utility model.

Examples are given. A concentrated winding stator core of a tractor is shown in figure 1, and comprises an iron core 1 and windings, wherein the iron core 1 is of an integral structure, the windings are concentrated windings, the windings comprise four paths of A-phase windings (shown as A in figure 1) which are connected in parallel, the four paths of A-phase windings are uniformly distributed on the iron core 1, two sides of the A-phase windings are respectively provided with a B-phase winding (shown as B in figure 1) and a C-phase winding (shown as C in figure 1), the four paths of B-phase windings are connected in parallel, and the four paths of C-phase windings are connected in parallel.

The stator core adopts 36-slot 32-level slot matching ratio and spans 1, and the A-phase winding, the B-phase winding and the C-phase winding are wound and sequentially span three adjacent slots of the core 1.

The phase A winding, the phase B winding and the phase C winding are all enameled wires, a paraffin layer is arranged on the outer side of each enameled wire, and the thickness of each paraffin layer is 0.02-0.03 mm. The paraffin is used for reducing the frictional resistance of the enameled wire, the enameled wire is prevented from being scratched in the winding process, and the yield of the stator core is improved. The thickness of the paraffin layer is 0.02-0.03mm, the paraffin accumulation phenomenon in the winding process is avoided on the premise of ensuring that the frictional resistance of the enameled wire is reduced, and the excessive paraffin consumption is also avoided.

The preparation method comprises the following steps: the method is characterized in that a flying fork type winding method is adopted, a concentrated winding type winding mode is adopted, the enameled wire required by each phase is wound on the stator teeth of the iron core 1 by using the flying fork method, 4-path parallel connection branches are adopted (as shown in figure 1), A, B, C three-phase winding is carried out, each phase spans 3 grooves, the gap is 6 grooves, then 3 grooves are spanned, the process is circulated for 4 times, the three phases are adjacent in sequence, binding wires are led out, and compared with the existing concentrated winding mode, the production efficiency is improved by more than 50%.

The utility model is an improvement on the basis of the existing stator core, and the main improvement is that firstly, a concentrated winding is adopted, so that the winding form of the winding is changed from the existing vertical type slot spanning structure into a left-right type slot spanning structure, which is determined by different winding forms of a distributed winding and the concentrated winding, at the moment, the end part size of the winding can be reduced to be less than 10mm, the end part size is reduced, the using amount of enameled wires is reduced, and the production cost of the stator core is reduced. Second, iron core have adopted monolithic structure, do not have the concatenation, lead to the size precision of iron core good, are difficult to produce vibration noise, and the overall structure intensity of iron core is better, and under the operating condition, difficult resonance produces the noise. The existing iron core adopts a splicing type structure, firstly, the winding is carried out on the iron core block, then, the splicing of the iron core block is completed, the structure of the stator iron core is compact, the remained winding space is small, the traditional winding equipment cannot complete the winding on the integral winding iron core, an applicant finds a new winding equipment which can complete the winding on the integral winding iron core, the splicing type iron core is improved into the integral iron core, the flyaway winding is adopted on the integral iron core, the winding is formed, the wiring times are reduced, the number of times can be reduced to 1 time to the greatest extent, the manual wiring time is greatly reduced, and the production efficiency of the iron core is improved. Therefore, the utility model has the advantages of lower production cost, lower noise and higher production efficiency.

As shown in fig. 3, X represents a noise curve of a motor equipped with a conventional stator core, and Y represents a noise curve of a motor equipped with the present invention. The noise of the motor assembled with the existing stator core can reach 68db, and the noise of the motor assembled with the stator core can reach about 55 db.

Claims

1. The utility model provides a winding stator core is concentrated to hauler which characterized in that: including iron core (1) and winding, iron core (1) is monolithic structure, the winding is concentrated winding, the winding includes the parallelly connected A looks wire winding of four ways, and four ways A looks wire winding evenly distributed is on iron core (1), and the wire-wound both sides of A looks are equipped with B looks wire winding and C looks wire winding respectively, and four ways B looks wire winding are parallelly connected, and four ways C looks wire winding is parallelly connected.

2. The traction machine concentrated winding stator core according to claim 1, characterized in that: the stator core adopts 36-slot 32-level slot matching ratio and spans 1, and the A-phase winding, the B-phase winding and the C-phase winding are all wound and sequentially span three slots of the core (1).

3. The traction machine concentrated winding stator core according to claim 1, characterized in that: and paraffin layers are arranged on the outer sides of the phase A winding, the phase B winding and the phase C winding, and the thickness of each paraffin layer is 0.02-0.03 mm.