Common punching plate assembly for different motors and motor

Abstract

The utility model relates to a common punching sheet assembly for different motors and a motor, the assembly includes a common stator punching sheet and a common rotor punching sheet, the common stator punching sheet includes a stator center hole and a plurality of stator slots, the stator slot opening width of the stator slot is 4.5mm and the extension dimension is 1.4mm, the stator slot body width is within the range of 7mm and 9mm and the extension dimension is 25mm, the stator slot body includes a closed straight line segment with a diameter within the range of 9.9mm and 12mm; the common rotor punching sheet includes a rotor shaft hole and a plurality of rotor slots, the first end of the radial inner slot segment of the rotor slot is closed by an arc with a diameter within the range of 3mm and 4.5mm, the second end has an arc with a diameter within the range of 7mm and 9.5mm, and the radial outer slot segment is closed by an arc with a diameter within the range of 6mm and 9mm. The utility model provides a common punching sheet that can be adapted to motors with different center heights and different powers, saves punching sheet mold costs, and reduces production complexity.

Description

Technical Field

[0001] The invention relates to a common punching sheet assembly for different motors and the motor. Background Art

[0002] Motors are widely used in various fields. As important components of three-phase asynchronous motors, motor rotors and stators are formed by stacking rotor and stator punching sheets respectively. The design of rotors and stators will directly affect the performance of motors. Current motors have the problem of material waste. Different motors use the same three-circle size, the same end ring, and different slot sizes, which has an adverse effect on the complexity of workshop production, mold management, and motor costs. Summary of the invention

[0003] In view of this, the embodiment of the present invention proposes a new type of common punching sheet assembly for different motors and a motor using the common punching sheet assembly. By optimizing the slot type of the stator and rotor punching sheets, the motor slot fill rate is improved, the motor performance is improved, and the performance of different motors is taken into account at the same time. Under the premise of not affecting the cost of the motor, the different energy efficiency requirements of different motors are met at the same time. For example, two motors with different energy efficiency levels of different center heights and different powers use the same punching sheet, which saves the cost of motor manufacturing.

[0004] According to a preferred embodiment of the utility model, on the one hand, a common punching sheet assembly for different motors is provided, the common punching sheet assembly includes a common stator punching sheet and a common rotor punching sheet, wherein the common stator punching sheet includes: a stator center hole, which is arranged in the central area of ​​the common stator punching sheet; a plurality of stator slots, which are arranged to surround the stator center hole and each stator slot is connected to the stator center hole, each stator slot includes a stator slot opening connected to the stator center hole and a stator slot body extending away from the stator center hole from the stator slot opening, the width of the stator slot opening is 4.5 mm, the dimension of the stator slot opening extending in the radial direction of the common stator punching sheet is 1.4 mm, and the width of the stator slot body is in the range of 7 mm and 9 mm, and the dimension of the stator slot body extending in the radial direction of the common stator punching sheet is 25 mm, wherein the stator slot body includes two straight line segments extending from the stator slot opening away from the stator center hole and a circular arc closing the two straight line segments, wherein the diameter of the circular arc is in the range of 9.9 mm and 12 mm. The common rotor punching in the assembly comprises: a rotor shaft hole, which is arranged in the central area of ​​the common rotor punching; and a plurality of rotor slots, which are arranged to surround the rotor shaft hole and extend in the radial direction of the common rotor punching respectively, wherein each rotor slot comprises: a radial inner slot segment, which is arranged to be close to the rotor shaft hole, the profile of the radial inner slot segment gradually narrows toward the rotor shaft hole, the first end of the radial inner slot segment close to the rotor shaft hole is closed by a first arc, and the second end of the radial inner slot segment away from the rotor shaft hole has a second arc, wherein the second arc has an opening; a radial middle The slot segment is connected to the opening of the second circular arc of the radial inner slot segment and is composed of two straight line segments extending in parallel to the radial direction of the common rotor punching sheet, and the width and height of the radial middle slot segment are both 2.6 mm; and the radial outer slot segment is arranged away from the rotor shaft hole and connected to the radial middle slot segment, and the radial outer slot segment is closed by a third circular arc, wherein the diameter of the first circular arc is within the range of 3 mm and 4.5 mm, the diameter of the second circular arc is within the range of 7 mm and 9.5 mm, and the diameter of the third circular arc is within the range of 6 mm and 9 mm. The common stator punching sheet provided by this embodiment can be applied to motors of different energy efficiency levels, simplifying the manufacture of the stator punching sheet and reducing the manufacturing cost.

[0005] According to an exemplary embodiment of the present invention, in a common stator punching sheet, the width of the stator slot body is 8.8 mm, and the diameter of the arc closing the two straight line segments is 11.3 mm; and in a common rotor punching sheet, the diameter of the first arc is 4 mm, the diameter of the second arc is 8.8 mm, and the diameter of the third arc is 6 mm.

[0006] According to an exemplary embodiment of the utility model, the stator slot opening is connected to the stator slot body via a first fillet and a second fillet, wherein the radius of the first fillet is 0.5 mm and the radius of the second fillet is 0.8 mm. This enables the motor using a common stator punching to use less copper material than the industry standard motor, thereby improving the motor's operating efficiency.

[0007] According to an exemplary embodiment of the utility model, adjacent straight sections of adjacent stator slots of a plurality of stator slots are parallel to each other. The common stator punching sheet provided by the utility model can be used for motors with different motor energy efficiency levels and has a higher power factor than the motors of the industry standard.

[0008] According to an exemplary embodiment of the utility model, the number of the plurality of stator slots is 48. The common stator punching sheet provided by this embodiment is applicable to motor models with different motor energy efficiencies, and motors meeting different requirements can be manufactured using the same punching sheet.

[0009] According to an exemplary embodiment of the utility model, the radial inner slot segment has a radial dimension of 38 mm, and the rotor slot has a radial dimension of 46.6 mm. This enables the motor using common rotor laminations to use less copper material than the industry standard motor, thereby improving the motor's operating efficiency.

[0010] According to an exemplary embodiment of the utility model, the radial inner slot segment is connected to the radial middle slot segment via a fillet, and the radius of the fillet is 0.5 mm. The common rotor punching provided by the utility model can be used for motors with different motor energy efficiency levels, and has a higher power factor than the industry standard motor.

[0011] According to an exemplary embodiment of the utility model, the number of the plurality of rotor slots is 40. The common rotor punching provided by this embodiment is suitable for motor models with different motor energy efficiencies, and motors meeting different requirements can be manufactured using the same punching.

[0012] According to a preferred embodiment of the utility model, a motor is provided on the other hand, the motor includes a stator and a rotor, the stator includes a plurality of stator punchings stacked together, each stator punching is a common stator punching according to the common punching assembly described above, and the rotor includes a plurality of rotor punchings stacked together, each rotor punching is a common rotor punching according to the common punching assembly described above. The motor according to this embodiment has an IE3 or IE4 motor energy efficiency level. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the above and other features and advantages of the present invention will be more apparent to those skilled in the art. In the accompanying drawings:

[0014] Figure 1 A common punching sheet assembly for different motors according to an embodiment of the present invention is shown.

[0015] Figure 2 A schematic diagram showing stator slots of a common stator punching sheet according to an embodiment of the present utility model is shown.

[0016] Figure 3 A schematic diagram showing rotor slots of a common rotor punching sheet according to an embodiment of the present invention.

[0017] The reference numerals are as follows:

[0018] 10. stator center hole; 20. stator slot; 30. rotor shaft hole;

[0019] 40, rotor slots; 100, common stator punchings; 200, common rotor punchings

[0020] 21. stator slot opening; 22. stator slot body; 20a. width of stator slot opening;

[0021] 20b, radial extension dimension of the stator slot opening; 20c, width of the stator slot body; 20d, radial extension dimension of the stator slot body;

[0022] 20e, arc diameter of the stator slot body; 20f, radius of the first fillet; 20g, radius of the second fillet;

[0023] 41. radial inner groove section; 42. radial middle groove section; 43. radial outer groove section;

[0024] 40a, the diameter of the first arc of the radial inner slot segment; 40b, the diameter of the second arc of the radial inner slot segment; 40c, the height of the radial middle slot segment;

[0025] 40d, the width of the radial middle slot segment; 40e, the diameter of the third arc of the radial outer slot segment; 40f, the radial extension dimension of the radial inner slot segment;

[0026] 40g, radial extension dimension of the rotor slot; 40h, radius of the fillet. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with reference to the following embodiments.

[0028] Figure 1 The common punching sheet assembly for different motors according to an embodiment of the utility model is shown. The common punching sheet assembly includes a common stator punching sheet 100 and a common rotor punching sheet 200. Figure 1The common stator sheet 100 shown includes a stator center hole 10 and a plurality of stator slots 20. The stator center hole 10 is disposed in the central region of the common stator sheet 100. The plurality of stator slots 20 are evenly distributed on the circumference of the common stator sheet 100 around the stator center hole 10. Each stator slot 20 extends in the radial direction of the common stator sheet 100 and is connected to the stator center hole 10. In this embodiment, the number of stator slots 20 is 48. Figure 1 The common rotor punching 200 shown includes a rotor shaft hole 30 and a plurality of rotor slots 40. The rotor shaft hole 30 is provided in the central region of the common rotor punching 200. Each rotor slot 40 extends in the radial direction of the common rotor punching 200. Moreover, the rotor slots 40 are evenly distributed on the circumference of the common rotor punching 200 around the rotor shaft hole 30. In this embodiment, the number of the rotor slots 20 is 40.

[0029] Figure 2 A schematic diagram of a stator slot of a common stator punching sheet according to an embodiment of the utility model is shown. Figure 2 In the illustrated embodiment, each stator slot 20 includes a stator slot opening 21 connected to the stator center hole and a stator slot body 22 extending from the stator slot opening away from the stator center hole. The width 20a of the stator slot opening is 4.5 mm, the dimension 20b of the stator slot opening extending in the radial direction of the common stator punching sheet is 1.4 mm, and the width 20c of the stator slot body is in the range of 7 mm and 9 mm. In a preferred embodiment, the width of the stator slot body is 8.8 mm. The adjacent straight segments of two adjacent stator slots in the plurality of stator slots 20 are parallel to each other. The dimension 20d of the stator slot body 22 of each stator slot 20 extending in the radial direction of the common stator punching sheet is 25 mm. The stator slot body 22 includes two straight segments extending from the stator slot opening 21 away from the stator center hole and a circular arc closing the two straight segments, and the diameter 20e of the circular arc is in the range of 9.9 mm and 12 mm. In a preferred embodiment, the diameter of the circular arc is 11.3 mm. The stator slot opening 21 is connected to the stator slot body 22 via a first fillet and a second fillet. The radius 20 f of the first fillet is 0.5 mm, and the radius 20 g of the second fillet is 0.8 mm.

[0030] Figure 3 A schematic diagram of a rotor slot of a common rotor punching sheet according to an embodiment of the utility model is shown. Figure 3In the illustrated embodiment, each rotor slot 40 includes a radial inner slot segment 41, a radial middle slot segment 42, and a radial outer slot segment 43 arranged in the radial direction. The radial inner slot segment 41 is arranged close to the shaft hole, and the profile of the radial inner slot segment 41 gradually narrows toward the rotor shaft hole. The first end of the radial inner slot segment 41 close to the rotor shaft hole is closed by a first arc, and the diameter 40a of the first arc is in the range of 3mm and 4.5mm. In a preferred embodiment, the diameter of the first arc is 4mm. Moreover, the second end of the radial inner slot segment 41 away from the rotor shaft hole has a second arc, and the second arc has two axially symmetrical sections, the two sections are on the same arc, and the diameter 40b of the second arc is in the range of 7mm and 9.5mm. In a preferred embodiment, the diameter of the second arc is 8.8mm, wherein the second arc has an opening. The radial middle slot segment 42 is connected to the opening of the radial inner slot segment 41 and is composed of two straight segments extending parallel to the radial direction. The width 40d and height 40c of the radial middle slot segment are both 2.6 mm. The radial outer slot segment 43 is arranged away from the rotor shaft hole and connected to the radial middle slot segment 42. The radial outer slot segment 43 is closed by a third arc, and the diameter 40e of the third arc is in the range of 6 mm and 9 mm. In a preferred embodiment, the diameter of the third arc is 6 mm. The dimension 40f extending in the radial direction of the radial inner slot segment is 38 mm, and the dimension 40g extending in the radial direction of the rotor slot is 46.6 mm. The radial inner slot segment 41 is connected to the radial middle slot segment via one or more fillets, and the radius 40h of each fillet is 0.5 mm.

[0031] See Table 1, which shows the comparison of the electrical performance of a motor with IE3 energy efficiency level using the common punching sheet assembly optimized according to the embodiment of the utility model and the electrical performance of a motor with IE3 energy efficiency level using the stator punching sheet and the rotor punching sheet before optimization according to the industry standard and the prior art. In the prior art before optimization, the opening width of the stator slot of the stator punching sheet is 4.8mm, the opening height is 1.5mm, the width of the stator slot body is 8.8mm, the radial height of the stator slot body is 25mm, and the arc radius of the stator slot body is 5.6mm. At the same time, in the prior art before optimization, the diameters of the arcs of the rotor slots of the rotor punching sheet are 3.5mm, 7.9mm and 6.5mm respectively, the radial height of the rotor slot is 42.5mm, the radial inner slot section height of the rotor slot is 31mm, the radial middle slot section height is 5mm, and the radial outer slot section height is 6.5mm.

[0032] IE3 motor standard Before optimization After optimization Power Factor 0.86 0.851 0.852 Motor efficiency 94.6％ 94.5％ 94.68％ Winding temperature rise 80 59.9 57.9 Starting torque multiple 2.6 2.93 2.63 Starting current multiple 7.6 8.33 8.53

[0033] Table 1

[0034] See Table 2, which shows the comparison of the electrical performance of a motor with IE4 energy efficiency level using the common punching sheet assembly optimized according to the embodiment of the utility model and the electrical performance of a motor with IE4 energy efficiency level using the stator punching sheet and the rotor punching sheet before optimization according to the industry standard and the prior art. In the prior art before optimization, the opening width of the stator slot of the stator punching sheet is 4.5mm, the opening height is 1.4mm, the width of the stator slot body is 9.3mm, the radial height of the stator slot body is 29mm, and the arc radius of the stator slot body is 6.2mm. At the same time, in the prior art before optimization, the diameters of the arcs of the rotor slots of the rotor punching sheet are 4mm, 8.8mm and 6mm respectively, the radial height of the rotor slot is 48.5mm, the radial inner slot section height of the rotor slot is 40mm, the radial middle slot section height is 2.5mm, and the radial outer slot section height is 6mm.

[0035] IE4 motor standard After optimization Power Factor 0.85 0.841 Motor efficiency 95.4％ 95.6％ Winding temperature rise 80 56.8 Starting torque multiple 2.5 2.8 Starting current multiple 8.5 8.8

[0036] Table 2

[0037] In the above Tables 1 and 2, "power factor" indicates the ratio of the actual power of the motor to the nominal power; "motor efficiency" indicates the ratio of the output power of the motor to the input power; "winding temperature rise" indicates the difference between the operating temperature of the motor winding and the ambient temperature; "starting torque multiple" indicates the ratio of the starting torque of the motor to the rated torque; "starting current multiple" indicates the ratio of the starting current to the rated current. Compared with motors using industry standards, by adopting the common punching sheet assembly of the embodiment of the utility model, the performance of motors with IE3 or IE4 energy efficiency levels is optimized, the power factor and motor efficiency are improved, the motor temperature rise is reduced, the starting torque multiple of the motor is improved, and the starting current multiple is increased. By optimizing the slot type of the motor stator and rotor punching sheets, the motor slot fill rate is increased, the motor performance is improved, and different energy efficiency requirements are met without affecting the motor cost. Motors with different energy efficiency levels can use the same punching sheets, saving motor costs.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A common punching plate assembly for different motors, characterized in that: The common punching sheet assembly comprises a common stator punching sheet (100) and a common rotor punching sheet (200), wherein: The common stator punching sheet (100) comprises: A stator center hole (10) is arranged in the center area of ​​the common stator punching sheet (100); A plurality of stator slots (20) are arranged around the stator center hole (10) and each of the stator slots (20) is communicated with the stator center hole (10), Each of the stator slots (20) comprises a stator slot opening (21) communicating with the stator center hole (10) and a stator slot body (22) extending from the stator slot opening (21) away from the stator center hole (10), wherein the width of the stator slot opening (21) is 4.5 mm, the dimension of the stator slot opening (21) extending in the radial direction of the common stator punching sheet (100) is 1.4 mm, and the width of the stator slot body (22) is within the range of 7 mm to 9 mm, and the dimension of the stator slot body (22) extending in the radial direction of the common stator punching sheet (100) is 25 mm, The stator slot body (22) comprises two straight line segments extending from the stator slot opening (21) away from the stator center hole (10) and a circular arc closing the two straight line segments, wherein the diameter (20e) of the circular arc is within the range of 9.9 mm and 12 mm, and The common rotor punching sheet (200) comprises: A rotor shaft hole (30) is arranged in the central area of ​​the common rotor punching sheet (200); and A plurality of rotor slots (40) are arranged around the rotor shaft hole (30) and extend respectively in the radial direction of the common rotor punching sheet (200), wherein each of the rotor slots (40) comprises: a radial inner slot segment (41) arranged close to the rotor shaft hole (30), the profile of the radial inner slot segment (41) gradually narrowing toward the rotor shaft hole (30), a first end of the radial inner slot segment (41) close to the rotor shaft hole (30) being closed by a first circular arc, and a second end of the radial inner slot segment (41) far from the rotor shaft hole (30) being provided with a second circular arc, wherein the second circular arc has an opening; a radial middle slot segment (42) which is connected to the opening of the second circular arc of the radial inner slot segment (41) and is composed of two straight line segments extending parallel to the radial direction of the common rotor punching sheet, wherein the width and height of the radial middle slot segment (42) are both 2.6 mm; and a radial outer slot segment (43) arranged away from the rotor shaft hole (30) and connected to the radial middle slot segment (42), wherein the radial outer slot segment (43) is closed by a third circular arc, The diameter (40a) of the first circular arc is within the range of 3 mm to 4.5 mm, the diameter (40b) of the second circular arc is within the range of 7 mm to 9.5 mm, and the diameter (40e) of the third circular arc is within the range of 6 mm to 9 mm.

2. The common punching sheet assembly according to claim 1, characterized in that: In the common stator punching sheet (100), the width of the stator slot body (22) is 8.8 mm, and the diameter (20e) of the arc closing the two straight line segments is 11.3 mm; and in the common rotor punching sheet (200), the diameter (40a) of the first arc is 4 mm, the diameter (40b) of the second arc is 8.8 mm, and the diameter (40e) of the third arc is 6 mm.

3. The common punching sheet assembly according to claim 1, characterized in that: The stator slot opening (21) is connected to the stator slot body (22) via a first fillet and a second fillet, wherein the radius (20f) of the first fillet is 0.5 mm, and the radius (20g) of the second fillet is 0.8 mm.

4. The common punching sheet assembly according to claim 1, characterized in that: Adjacent straight line segments of adjacent stator slots (20) of the plurality of stator slots (20) are parallel to each other.

5. The common punching sheet assembly according to claim 1, characterized in that: The number of the plurality of stator slots (20) is 48.

6. The common punching sheet assembly according to claim 1, characterized in that: The dimension of the radial inner groove segment (41) extending in the radial direction of the common rotor punching sheet is 38 mm, and the dimension of the rotor groove (40) extending in the radial direction is 46.6 mm.

7. The common punching sheet assembly according to claim 1, characterized in that: The radial inner groove segment (41) is connected to the radial middle groove segment (42) via a fillet, and the radius of the fillet is 0.5 mm.

8. The common punching sheet assembly according to claim 1, characterized in that: The number of the plurality of rotor slots (40) is 40.

9. A motor, characterized in that: The motor includes a stator and a rotor, wherein the stator includes a plurality of stator punching sheets stacked together, each of the stator punching sheets is the common stator punching sheet (100) of the common punching sheet assembly according to any one of claims 1-8, and the rotor includes a plurality of rotor punching sheets stacked together, each of the rotor punching sheets is the common rotor punching sheet (200) of the common punching sheet assembly according to any one of claims 1-8.

10. The motor according to claim 9, characterized in that The motor has an IE3 or IE4 motor energy efficiency class.

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