Armature punching sheet for permanent magnet direct current motor

Abstract

The utility model discloses an armature punching sheet used for a permanent magnet DC motor, comprising an armature punching sheet, the armature punching sheet is composed of a hollow groove and a winding groove, and the winding groove comprises a U-phase limiting end, a V-phase limiting end and a W-phase limiting end. According to the utility model, the twenty-four winding grooves are arranged on the armature punching sheet, and the groove depth is two fifths of the length from the inner ring to the outer ring of the armature punching sheet, so that the armature inductance can be reduced through the design of reducing the groove depth and avoiding an over-deep groove; meanwhile, the plurality of hollow grooves are designed, so that the inductor has the advantages of optimizing inductance characteristics, reducing commutation sparks and reducing material cost; the U-phase limiting end, the V-phase limiting end and the W-phase limiting end are arranged on the winding groove to limit winding of a U wire, a V wire and a W wire, the U wire, the V wire and the W wire are prevented from being wound and interwoven together, and meanwhile an installer can conveniently wind the U wire, the V wire and the W wire through the U-phase limiting end, the V-phase limiting end and the W-phase limiting end.

Description

Technical Field

[0001] The utility model relates to the technical field of armature punching sheets, in particular to an armature punching sheet used for a permanent magnet DC motor. Background Art

[0002] A permanent magnet DC motor is a motor that uses a permanent magnet as an excitation source. It has the advantages of small size, high efficiency, and high power density. As an important component of a permanent magnet motor, the armature punching sheet plays the role of fixing and protecting the permanent magnet. The punching sheet is an important part of the permanent magnet motor structure and plays a number of key roles. The existing patent (application number: CN201620919469.X) discloses an armature punching sheet for a permanent magnet DC motor, including a punching sheet body, 18 armature teeth are arranged at intervals on the outer edge of the punching sheet body, and 18 armature slots are arranged correspondingly between the armature teeth. With the stacked winding of the punching sheet of the utility model, the armature winding span adopts 1-5, so that the coil end on the armature tooth is shorter; the armature punching sheet needs to be wound with U wire, V wire and W wire. Due to the large number of winding coils, it is easy to cause two different lines to be entangled together. Therefore, in view of the above problems, the applicant proposes an armature punching sheet for a permanent magnet DC motor. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes an armature punching sheet for a permanent magnet DC motor.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An armature punching sheet for a permanent magnet DC motor comprises an armature punching sheet, wherein the armature punching sheet is composed of a hollow slot and a winding slot, and the winding slot comprises a U-phase limit end, a V-phase limit end and a W-phase limit end.

[0006] Preferably, the armature punching sheet is a silicon armature punching sheet. The armature punching sheet adopts silicon steel sheet because of its high resistivity and good anti-eddy current loss characteristics, which is crucial to reduce the eddy current loss caused by the change of magnetic flux during the operation of the motor. In addition, the silicon steel sheet also has good magnetic permeability and mechanical properties, which can meet the design requirements of the motor armature core; the surface of the armature punching sheet is sprayed with an insulating coating, and in order to improve the efficiency and reliability of the motor, the insulating coating is an insulating paint; thinner armature punching sheets help to reduce eddy current losses, but may increase manufacturing difficulty and cost; while thicker armature punching sheets may increase eddy current losses, but may increase mechanical strength and reduce manufacturing costs. The thickness of the armature punching sheet is between 0.2mm and 0.5mm.

[0007] Preferably, the multiple hollow grooves opened in the armature punching sheets are mainly used to reduce the weight of the multiple stacked armature punching sheets, and also have the advantages of optimizing inductance characteristics, reducing commutation sparks and reducing material costs. The armature punching sheets are provided with multiple hollow grooves in a ring array.

[0008] Preferably, the armature punching sheet is provided with twenty-four winding grooves in a circular array. From Figures 1 to 2 of the accompanying drawings in the specification, it can be seen that the depth of the twenty-four winding grooves is two-fifths of the length from the inner circle to the outer circle of the armature punching sheet. By reducing the groove depth and avoiding the design of excessively deep grooves, the armature inductance can be reduced.

[0009] Preferably, the twenty-four winding slots are each provided with a U-phase limiting end, a V-phase limiting end and a W-phase limiting end; in the state shown in the figure attached to the specification, the U-phase limiting end, the V-phase limiting end and the W-phase limiting end provided on the winding slot are distributed into three spaces, and the U line is installed in the space formed by the three adjacent U-phase limiting ends and the winding slot, and then installed in sequence with a staggered manner. The positions of the U line, V line and W line installed on the winding slot in the figure attached to the specification can be referred to. Here, the U line, V line and W line in the figure attached to the specification are only partially drawn, and not all of them are drawn.

[0010] The utility model has the following beneficial effects:

[0011] In the utility model, twenty-four winding slots are arranged on the armature punching sheet, and the slot depth is two-fifths of the length from the inner ring to the outer ring of the armature punching sheet. By reducing the slot depth and avoiding the design of too deep slots, the armature inductance can be reduced. At the same time, the multiple hollow slots designed also have the advantages of optimizing the inductance characteristics, reducing the commutation spark and reducing the material cost.

[0012] The winding groove is provided with U-phase limiting end, V-phase limiting end and W-phase limiting end to limit the winding of U line, V line and W line to avoid the entanglement of U line, V line and W line. At the same time, the U-phase limiting end, V-phase limiting end and W-phase limiting end also facilitate the installer to wind the U line, V line and W line. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the armature punching sheets wound with U wires, V wires and W wires for the armature punching sheets of the permanent magnet DC motor proposed by the utility model;

[0014] Figure 2 The first schematic diagram of the armature punching structure of the armature punching for the permanent magnet DC motor proposed by the utility model;

[0015] Figure 3 The utility model proposes an armature punching plate for a permanent magnet DC motor Figure 2 A local enlarged structural schematic diagram;

[0016] Figure 4 The utility model provides a second schematic diagram of the armature punching structure of an armature punching for a permanent magnet DC motor.

[0017] In the figure: 1, armature punching plate; 10, hollow slot; 11, winding slot; 110, U-phase limit end; 111, V-phase limit end; 112, W-phase limit end. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-4 An armature punching sheet for a permanent magnet DC motor includes an armature punching sheet 1, wherein the armature punching sheet 1 is composed of a hollow groove 10 and a winding groove 11, and the winding groove 11 includes a U-phase limiting end 110, a V-phase limiting end 111 and a W-phase limiting end 112.

[0020] In this embodiment, the armature punching sheet 1 is a silicon armature punching sheet. The armature punching sheet 1 uses silicon steel sheet because of its high resistivity and good anti-eddy current loss characteristics, which is crucial to reducing the eddy current loss caused by the change of magnetic flux during the operation of the motor. In addition, the silicon steel sheet also has good magnetic permeability and mechanical properties, which can meet the design requirements of the motor armature core; the surface of the armature punching sheet 1 is sprayed with an insulating coating, and in order to improve the efficiency and reliability of the motor, the insulating coating is an insulating paint; a thinner armature punching sheet 1 helps to reduce eddy current loss, but may increase manufacturing difficulty and cost; while a thicker armature punching sheet may increase eddy current loss, but may improve mechanical strength and reduce manufacturing cost, and the thickness of the armature punching sheet 1 is between 0.2mm and 0.5mm.

[0021] In this embodiment, the multiple hollow grooves 10 opened in the armature punching sheet 1 are mainly used to reduce the weight of the multiple stacked armature punching sheets 1. It also has the advantages of optimizing inductance characteristics, reducing commutation sparks and reducing material costs. The armature punching sheet 1 is provided with multiple hollow grooves 10 in a ring array.

[0022] In this embodiment, the armature punching sheet 1 is provided with 24 winding slots 11 in a circular array. Figures 1 to 4 It can be seen that the slot depth of the twenty-four winding slots 11 is two-fifths of the length from the inner ring to the outer ring of the armature punching plate 1. By reducing the slot depth and avoiding the design of too deep slots, the armature inductance can be reduced.

[0023] In this embodiment, the twenty-four winding slots 11 are all provided with a U-phase limiting end 110, a V-phase limiting end 111 and a W-phase limiting end 112; Figure 3 In the state shown, the U-phase limiting end 110, the V-phase limiting end 111 and the W-phase limiting end 112 set on the winding groove 11 distribute it into three spaces, and the spaces formed by the three adjacent U-phase limiting ends 110 and the winding groove 11 are installed with U wires, and then staggered and installed in sequence. Please refer to the attached drawings of the specification Figure 1 The U wire, V wire and W wire in the winding groove 11 are installed at the position of the winding groove 11. Figure 1 The U line, V line and W line are only partially drawn, not all of them.

[0024] The use method and advantages of the utility model: When the DC motor which is easy to install and fix is ​​used, the working process is as follows:

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, twenty-four winding slots 11 are arranged on the armature punching sheet 1, and the slot depth is two-fifths of the length from the inner ring to the outer ring of the armature punching sheet 1. By reducing the slot depth and avoiding the design of too deep slots, the armature inductance can be reduced. At the same time, the multiple hollow slots 10 designed also have the advantages of optimizing inductance characteristics, reducing commutation sparks and reducing material costs;

[0026] The winding groove 11 is provided with a U-phase limiting end 110, a V-phase limiting end 111 and a W-phase limiting end 112 to limit the winding of the U line, V line and W line to avoid the entanglement of the U line, V line and W line. At the same time, the U-phase limiting end 110, the V-phase limiting end 111 and the W-phase limiting end 112 also facilitate the installer to wind the U line, V line and W line.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An armature punching sheet for a permanent magnet DC motor, characterized in that: The invention comprises an armature punching sheet (1), wherein the armature punching sheet (1) is composed of a hollow slot (10) and a winding slot (11), and the winding slot (11) comprises a U-phase limiting end (110), a V-phase limiting end (111) and a W-phase limiting end (112).

2. The armature punching sheet for a permanent magnet DC motor according to claim 1, characterized in that: The armature punching sheet (1) is a silicon armature punching sheet, the surface of the armature punching sheet (1) is sprayed with an insulating coating, and the thickness of the armature punching sheet (1) is between 0.2 mm and 0.5 mm.

3. The armature punching sheet for a permanent magnet DC motor according to claim 1, characterized in that: The armature punching sheet (1) is provided with a plurality of hollow grooves (10) in an annular array.

4. The armature punching sheet for a permanent magnet DC motor according to claim 1, characterized in that: The armature punching sheet (1) is provided with twenty-four winding grooves (11) in a ring array.

5. The armature punching sheet for a permanent magnet DC motor according to claim 4, characterized in that: The twenty-four winding slots (11) are each provided with a U-phase limiting end (110), a V-phase limiting end (111) and a W-phase limiting end (112).

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