阅读说明：本技术 一种闭口槽高压电机冲片结构 (Closed slot high-voltage motor punching sheet structure ) 是由 石倩倩 郝广政 薛晓麟 张艳 王志强 邱岳 于 2019-11-12 设计创作，主要内容包括：本发明公开了一种闭口槽高压电机冲片结构,包括开口槽定子冲片和定子槽口冲片,所述开口槽定子冲片的内侧环形阵列开设有槽口,所述开口槽定子冲片临近每组所述槽口的部位均开设有防脱落口,所述定子槽口冲片的外侧设置有与防脱落口相配合的防脱落扣,所述定子槽口冲片通过防脱落口和防脱落扣的配合扣铆安装于每组所述开口槽定子冲片的内侧。本发明可以改善气隙磁场均匀度,降低谐波分量,降低谐波损耗,降低电机齿槽转矩,降低转速及转矩脉动,降低电机运行噪音及振动,提高电机性能,提高电机效率并降低电机体积,与使用磁性槽楔相比,涡流损耗小,形状可灵活设计,便于提高高压电机的性能。(The invention discloses a closed slot high-voltage motor punching structure which comprises an open slot stator punching and a stator slot punching, wherein a slot is formed in the inner side of the open slot stator punching in an annular array mode, anti-falling holes are formed in the positions, close to each group of slots, of the open slot stator punching, anti-falling buckles matched with the anti-falling holes are arranged on the outer sides of the stator slot punching, and the stator slot punching is mounted on the inner side of each group of the open slot stator punching through the anti-falling holes and the matched buckles of the anti-falling buckles in a riveting mode. The invention can improve the uniformity of an air gap magnetic field, reduce harmonic components, harmonic loss, motor tooth space torque, rotating speed and torque pulsation, motor operation noise and vibration, motor performance, motor efficiency and motor volume.)

1. The utility model provides a closed slot high-voltage motor is towards piece structure, includes open slot stator punching (1) and stator notch punching (2), its characterized in that: notch (3) have been seted up to the inboard circular array of open slot stator punching sheet (1), open slot stator punching sheet (1) closes on every group anti-drop mouth (4) have all been seted up at the position of notch (3), the lateral part and notch (3) intercommunication of anti-drop mouth (4), the outside of stator slot punching sheet (2) is provided with and detains (5) with anti-drop mouth (4) matched with anti-drop, stator slot punching sheet (2) are detained through the cooperation of anti-drop mouth (4) and anti-drop knot (5) and are riveted and install in every group the inboard of open slot stator punching sheet (1).

2. The closed slot high-voltage motor punching sheet structure according to claim 1, characterized in that: the section of the open slot stator punching sheet (1) is arranged in a circular ring shape, the thickness of the open slot stator punching sheet (1) is 0.5mm, and the open slot stator punching sheet (1) is a cold-rolled silicon steel sheet open slot stator punching sheet.

3. The closed slot high-voltage motor punching sheet structure according to claim 1, characterized in that: the width of stator notch towards piece (2) is the same with the width of notch (3), the thickness of stator notch towards piece (2) is the same with the thickness of open slot stator towards piece (1), stator notch towards piece (2) is cold-rolled silicon steel sheet stator notch towards piece, stator notch towards piece (2) detains (5) formula structure as an organic whole with the anti-drop.

4. The closed slot high-voltage motor punching sheet structure according to claim 1, characterized in that: the section of the anti-falling port (4) is in the shape of a semi-arc, a rectangle, a semi-ellipse or a triangle.

5. The closed slot high-voltage motor punching sheet structure according to claim 1, characterized in that: the cross-section that anti-drop detained (5) is half circular arc, rectangle, semiellipse or triangle-shaped setting, just the cross-sectional shape that anti-drop detained (5) is the same with the cross-sectional shape of anti-drop mouth (4).

6. The closed slot high-voltage motor punching sheet structure according to claim 1, characterized in that: the buckle rivet between the anti-falling opening (4) and the anti-falling buckle (5) is assembled by adopting a sectional buckle rivet.

Technical Field

The invention relates to the technical field of high-voltage motors, in particular to a punching sheet structure of a closed slot high-voltage motor.

Background

The high-voltage motor is a motor with a rated voltage of more than 3300V. 6000V and 10000V are commonly used. The high voltage motor is generated because the motor power is proportional to the product of voltage and current, so that the current of the low voltage motor is limited by the allowable bearing capacity of the lead wire to a certain extent (such as 300KW/380V) and is difficult to be enlarged or the cost is too high. It is necessary to achieve a high power output by increasing the voltage. The high-voltage motor has the advantages of high power and strong impact bearing capacity; the disadvantages are large inertia and difficult starting and braking.

No matter which kind of form's high-voltage motor, high-voltage motor all has main parts such as stator, rotor, frame, bearing arrangement, outlet box, and the electric motor rotor: the rotating part in the motor is formed by overlapping silicon steel sheets and is a motor power output mechanism, and a motor stator: the fixed part in the motor is formed by overlapping silicon steel sheets, a coil winding is embedded in the fixed part, the coil winding generates a rotating magnetic field to push the rotor to rotate, and the punching sheet is characterized in that: the punching sheet is a silicon steel sheet, and is punched into punching sheets with different specifications so as to be suitable for motor stator rotors with different powers.

However, because the high-voltage motor coils are all formed coils, in order to ensure that the formed coils are normally off-line, the stator punching sheets of a general high-voltage motor are all open slots, the open slots cause non-uniform air gap magnetic field of the motor, the counter electromotive force harmonic component is high, the harmonic loss is large, the motor cogging torque is large, the torque pulsation is large, the operation is not stable, the vibration and the noise are large, the traditional high-voltage motor is designed by adopting a magnetic slot wedge to solve the problems caused by the open slots, but the performance of the magnetic slot wedge is unstable, the eddy current loss is large, and the shape design is not.

Disclosure of Invention

In view of the defects in the prior art, the invention aims to provide a punching sheet structure of a closed slot high-voltage motor, which has small eddy current loss and flexible shape design.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a closed slot high-voltage motor punching sheet structure, includes open slot stator punching sheet and stator notch punching sheet, the notch has been seted up to the inboard circular array of open slot stator punching sheet, open slot stator punching sheet closes on every group anti-drop mouth has all been seted up at the position of notch, anti-drop mouth's lateral part and notch intercommunication, the outside of stator notch punching sheet is provided with the anti-drop knot with anti-drop mouthful matched with, stator notch punching sheet is detained through the cooperation of anti-drop mouth and anti-drop knot and is riveted and install in every group the inboard of open slot stator punching sheet.

Furthermore, the cross section of the open slot stator punching sheet is arranged in a circular ring shape, the thickness of the open slot stator punching sheet is 0.5mm, and the open slot stator punching sheet is a cold-rolled silicon steel sheet open slot stator punching sheet.

Furthermore, the width of the stator notch punching sheet is the same as that of the notch, the thickness of the stator notch punching sheet is the same as that of the open slot stator punching sheet, the stator notch punching sheet is a cold-rolled silicon steel sheet stator notch punching sheet, and the stator notch punching sheet and the anti-falling buckle are of an integrated structure.

Furthermore, the section of the anti-falling opening is in the shape of a semi-arc, a rectangle, a semi-ellipse or a triangle.

Further, the cross-section that anti-drop was detained is half circular arc, rectangle, half oval or triangle-shaped setting, just the cross-sectional shape that anti-drop was detained is the same with the cross-sectional shape of anti-drop mouth.

Furthermore, the buckle rivet between the anti-falling opening and the anti-falling buckle is assembled by adopting a sectional buckle rivet.

In summary, due to the adoption of the technology, the invention has the beneficial effects that:

(1) according to the invention, through the matching between the anti-drop opening and the anti-drop buckle, the sectional type buckle rivet installation is simply and conveniently realized, the assembly and the fixation with an external stator winding are convenient, a stator notch iron core structure is formed, the side part of the notch is blocked, and a closed structure is formed, so that the uniformity of an air gap magnetic field can be improved, the harmonic component is reduced, the harmonic loss is reduced, the cogging torque of the motor is reduced, the rotating speed and the torque pulsation are reduced, the running noise and the vibration of the motor are reduced, the performance of the motor is improved, the efficiency of the motor is improved.

(2) In the invention, the cross sections of the anti-drop opening and the anti-drop buckle are various in shapes, compared with the magnetic slot wedge, the eddy current loss is small, the shapes can be flexibly designed, the performance of the high-voltage motor is convenient to improve, the design is convenient to carry out according to actual conditions, and the progressive die can be used for processing and forming, so that the production is convenient.

(3) According to the invention, the open slot stator punching sheet, the stator slot punching sheet and the anti-falling buckle are all processed by adopting cold-rolled silicon steel sheets, the silicon steel sheets are thin steel plates with very low carbon content, after silicon element is added, because silicon and iron form solid solution type alloy, the resistivity is improved, the resistivity of the silicon steel sheets is increased by utilizing the resistivity, the eddy current loss caused by the thickness direction is reduced, the performance is stable, and the eddy current loss is small.

Drawings

FIG. 1 is a schematic view of the whole structure of the anti-falling buckle of the present invention in a semi-circular arc shape;

FIG. 2 is an enlarged view of the portion A of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of a part of the anti-separation opening of the present invention in a semi-circular arc shape;

FIG. 4 is a schematic view of a part of the anti-falling buckle of the present invention in a semi-circular arc shape;

FIG. 5 is a schematic view of the overall structure of the rectangular anti-falling buckle of the present invention;

FIG. 6 is an enlarged view of the portion B of FIG. 5 according to the present invention;

FIG. 7 is a schematic view of a portion of the rectangular anti-separation opening of the present invention;

FIG. 8 is a schematic view of a rectangular anti-falling buckle according to the present invention;

FIG. 9 is a schematic view of the whole structure of the anti-falling buckle of the present invention in a semi-elliptical shape;

FIG. 10 is an enlarged view of the structure of portion C of FIG. 9 according to the present invention;

FIG. 11 is a schematic view of a part of the anti-separation opening of the present invention in a semi-elliptical shape;

FIG. 12 is a schematic view of a half-oval anti-separation buckle according to the present invention;

FIG. 13 is a schematic view of the overall structure of the triangular anti-falling buckle of the present invention;

FIG. 14 is an enlarged view of the structure of portion D of FIG. 13 in accordance with the present invention;

FIG. 15 is a schematic view of a triangular anti-falling buckle according to the present invention;

fig. 16 is a schematic view of the overall structure of the triangular anti-falling buckle of the present invention.

The labels in the figure are: 1. opening a slot stator punching sheet; 2. punching a stator notch; 3. a notch; 4. an anti-drop port; 5. and (5) an anti-falling buckle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of 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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be connected internally or in any other way by the interaction of two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art from the specification.