Armature sheet

Abstract

The utility model discloses an armature sheet, an even number of grooves are arranged in the armature sheet, teeth are arranged between adjacent grooves, and the armature sheet is characterized in that a groove is arranged in the middle of the outer diameter of each tooth. According to the utility model, the magnetic field distribution of the motor can be improved, the magnetic flux of the inductance coil is increased, the maximum conversion of electromagnetic power is realized, the air gap magnetic resistance can be effectively reduced, the current when the motor works is reduced, and the working efficiency of the motor is improved; and meanwhile, the first arc section and the second arc section reduce the winding resistance of the enameled wire, and the winding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to an armature sheet Background Art

[0002] See Figure 1 and Figure 2 For, the entire outer diameter R of the driven armature sheet 1 is a standard circle. An even number of slots 1a are provided in the armature sheet 1, and teeth 1b are provided between the slots 1a to facilitate the winding of enameled wire. The iron core with this structure is convenient to manufacture and has a low production cost. However, the disadvantages are: the parts are heavy, the moment of inertia is large, commutation is relatively difficult, and the sound quality of the motor operation is relatively poor, etc., which cannot meet the high requirements for sound quality of current new energy electric vehicles

[0003] In addition, the eccentricity Δ value of the existing armature sheet group is small, the magnetic field distribution of the motor is uneven, resulting in a small magnetic flux of the inductor coil, reducing the conversion of electromagnetic power, increasing the noise and vibration of the motor and causing the working efficiency of the motor; at the same time, the air gap of the existing armature sheet group is large, and the current during the operation of the motor is large

[0004] Moreover, the driven armature sheet 1 has a large resistance during the winding process of the enameled wire, which is not convenient for the winding of the enameled wire and has a low winding efficiency Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a new structure of an armature sheet aiming at the above technical problems existing in the existing armature sheet, so as to reduce the overall weight of the armature skeleton, reduce its moment of inertia during operation, and improve the sound quality of the motor

[0006] The technical problem to be solved by the utility model can be realized by the following technical solutions

[0007] An armature sheet is provided with an even number of slots and teeth are arranged between adjacent slots. The feature is that a groove is arranged at the middle position of the outer diameter of each tooth

[0008] In a preferred embodiment of the utility model, the groove is an arc-shaped groove, and the center of the arc-shaped groove and the center of the armature sheet are on the same straight line

[0009] In a preferred embodiment of the utility model, the arc-shaped groove is a semi-circular groove

[0010] In a preferred embodiment of the present utility model, on the outer diameter of each tooth, starting from two intersection points of the groove and the outer diameter circle of the armature sheet, a first arc segment and a second arc segment that are inscribed with and extend inwardly from the outer diameter circle of the armature sheet are provided. The first arc segment and the second arc segment are symmetrically arranged with respect to the groove. The centers of the first arc segment and the second arc segment of each tooth are concentric. The centers of the first arc segment and the second arc segment on all teeth are offset from the center of the armature sheet and are circumferentially evenly distributed around the center of the armature sheet.

[0011] In a preferred embodiment of the present utility model, the extended arcs of the first arc segments and the extended arcs of the second arc segments on two adjacent teeth intersect at the notch position of the groove between the two adjacent teeth.

[0012] In a preferred embodiment of the present utility model, the shortest distance between the intersection point of the extended line of the first arc segment and the extended arc of the second arc segment on two adjacent teeth and the outer diameter circle of the armature sheet is the armature sheet group eccentricity Δ value, and the armature sheet group eccentricity Δ value is 0.3 - 1.5 mm.

[0013] In a preferred embodiment of the present utility model, the armature sheet is punched from silicon steel sheet. Due to the adoption of the above technical solution, the present utility model can improve the magnetic field distribution of the motor, increase the magnetic flux of the inductor coil, so as to achieve the maximum conversion of electromagnetic power, can effectively reduce the air gap magnetic resistance, reduce the current during the operation of the motor, and improve the working efficiency of the motor; at the same time, the first arc segment and the second arc segment reduce the winding resistance of the enameled wire and improve the winding efficiency. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the existing armature structure.

[0015] Figure 2 It is a schematic diagram of the structure of the existing armature sheet.

[0016] Figure 3 It is a schematic diagram of the armature structure of the present utility model.

[0017] Figure 4 It is a schematic diagram of the structure of the armature sheet of the present utility model. Detailed Embodiments

[0018] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0019] Refer to Figure 3 and Figure 4 In the figure, an armature sheet 10 is shown. The armature sheet 10 has an outer diameter circle 13. Even numbers of slots 11 are evenly arranged in the armature sheet 10. In the present utility model, the number of slots 11 is six. Teeth 12 are arranged between adjacent slots 11, and the number of teeth 12 is six.

[0020] A groove 12a is provided at the middle position of the outer diameter of each tooth 12. The groove 12a is an arc-shaped groove, preferably a semi-circular groove, which can reduce the weight of the armature sheet 10, reduce the inertia during the rotation of the motor, reduce the vibration of the motor, and improve the sound quality of the motor.

[0021] On the outer diameter of each tooth 12, starting from two intersection points 12b and 12c of the groove 12a and the outer diameter circle 13 of the armature sheet 10, a first arc segment 12d and a second arc segment 12e that are tangent to the outer diameter circle 13 of the armature sheet 10 and extend inward are provided. The first arc segment 12d and the second arc segment 12e are symmetrically arranged with respect to the groove 12a. The centers O1 of the first arc segment 12d and the second arc segment 12e of each tooth are concentric. The centers O1 of the first arc segment 12d and the second arc segment 12e on all teeth 12 are offset from the center O of the armature sheet 10 and are circumferentially evenly distributed around the center O of the armature sheet 10. Doing so can, on the one hand, facilitate the winding of the enameled wire, reduce the resistance during the winding process of the enameled wire, and improve the production efficiency. On the other hand, it can improve the magnetic field distribution of the motor, increase the magnetic flux of the inductor coil, so as to achieve the maximum conversion of electromagnetic power and improve the working efficiency of the motor. Thirdly, it can effectively reduce the air-gap magnetic resistance and reduce the current during the operation of the motor.

[0022] The extension line 12da of the first arc segment 12d and the extension arc 12ea of the second arc segment 12e on two adjacent teeth 12 intersect at the position of the notch 11a of the slot 11 between the two adjacent teeth 12.

[0023] The shortest distance between the intersection point 14 of the extension line 12da of the first arc 12d and the extension arc 12ea of the second arc segment 12e on two adjacent teeth 12 and the outer diameter circle 13 of the armature sheet 10 is the armature sheet group eccentricity Δ value. The armature sheet group eccentricity Δ value is 0.3 - 1.5 mm. The armature sheet group eccentricity Δ value is greater than the eccentricity Δ value of the existing armature sheet 1, which can improve the noise and vibration of the motor.

[0024] The above-mentioned armature sheet 10 is punched from silicon steel sheets using a high-precision stamping die.

Claims

1. An armature sheet, having an even number of slots formed therein and teeth provided between adjacent slots, characterized in that, A groove is provided at the middle position of the outer diameter of each tooth; On the outer diameter of each tooth, starting from the two intersection points of the groove and the outer diameter circle of the armature sheet, a first arc segment and a second arc segment that are internally tangent to and extend inward from the outer diameter circle of the armature sheet are provided. The first arc segment and the second arc segment are symmetrically arranged with respect to the groove. The centers of the first arc segment and the second arc segment of each tooth are concentric. The centers of the first arc segment and the second arc segment on all teeth are offset from the center of the armature sheet and are circumferentially evenly distributed around the center of the armature sheet.

2. An armature sheet according to claim 1, characterized in that, The groove is an arc-shaped groove, and the center of the arc-shaped groove is located on the same straight line as the center of the armature sheet.

3. An armature sheet according to claim 2, characterized in that, The arc-shaped groove is a semi-circular groove.

4. An armature sheet according to any one of claims 1 to 3, characterized in that, The extended arcs of the first arc segments and the extended arcs of the second arc segments on two adjacent teeth intersect at the notch position of the groove between the two adjacent teeth.

5. An armature sheet according to claim 4, characterized in that The shortest distance between the intersection point of the extended line of the first arc segment and the extended arc of the second arc segment on two adjacent teeth and the outer diameter circle of the armature sheet is the eccentricity Δ value of the armature sheet group, and the eccentricity Δ value of the armature sheet group is 0.3 - 1.5 mm.

6. The armature sheet according to claim 1, wherein The armature sheet is made by punching silicon steel sheets.

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