Novel aluminum wire motor punching sheet developed based on cost reduction of water dispenser compressor

Abstract

The utility model discloses a novel aluminum wire motor punching sheet developed on the basis of cost reduction of a water dispenser compressor, which comprises a punching sheet body, a through hole for mounting a motor rotor is arranged at the center of the punching sheet body, a plurality of stator teeth uniformly protrude towards the through hole in the circumferential direction of the punching sheet body, and each stator tooth extends along the radial direction of the stator punching sheet. A stator groove is formed between every two adjacent stator teeth, the stator grooves are divided into a middle groove type, a first large groove type, a second large groove type, a third large groove type, a first small groove type and a second small groove type, and the whole punching sheet body is in bilateral symmetry and mirror symmetry. The winding adopts a distribution mode closer to sine, the structural design is more reasonable, the stator parallel tooth width Bt1 is changed to be (1.06-1.08) times of the original stator parallel tooth width Bt1, the punching sheet groove bottom chamfer r is designed to be 1.25 times of the original punching sheet groove bottom chamfer r, and the yoke area is increased, so that the flux density of the stator tooth part and the yoke part is reduced, the motor flux density is prevented from being in a supersaturation interval, and the service life of the motor is prolonged. Therefore, the performance of the whole compressor and the thermal attenuation amplitude of the motor using the motor can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of motor lamination technology, and in particular relates to a new type of aluminum wire motor lamination developed based on cost reduction of water dispenser compressors. Background Technology

[0002] With the advancement of home appliance technology and the improvement of living conditions, people's demands for their living environment are becoming increasingly diversified, leading to the gradual entry of dual-purpose hot and cold water dispensers into the public eye. Especially with the support of trade-in policies, the entire domestic market is promoting highly efficient, energy-saving, and low-cost home appliances. Many manufacturers are continuously optimizing and innovating the compressor components of their previously developed water dispensers, making the advantages of new products more prominent in terms of operating noise, applicable scenarios, and target audience. To meet market demand, manufacturers are developing lower-cost, more competitive energy-saving motors to further expand their market share.

[0003] As consumer awareness continues to evolve, the demand for home appliances is no longer limited to simply fulfilling functional needs; there is a greater emphasis on user experience and product quality. Traditional water dispensers are finding it inadequate in this trend. Furthermore, with the dual-carbon strategy under global climate change, and energy being the main battleground for achieving these goals, designing a highly efficient, energy-saving, quiet, and comfortable product is the relentless pursuit of technical personnel across the industry. If such a product also possesses a low-cost advantage, it can further secure a place in the ever-changing market.

[0004] Therefore, we propose a new type of aluminum wire motor lamination developed based on cost reduction of water dispenser compressors. Utility Model Content

[0005] The purpose of this invention is to provide a new type of aluminum wire motor lamination developed based on cost reduction of water dispenser compressors, thereby solving existing problems.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] This utility model is a novel aluminum wire motor lamination developed for cost reduction in water dispenser compressors. It includes a lamination body with a through hole at its center for mounting a motor rotor. Several stator teeth protrude evenly from the circumference of the lamination body towards the through hole. Each stator tooth extends radially along the lamination body, and a stator slot is formed between adjacent teeth. The bottom of each stator slot is a pear-shaped flat bottom. There are twenty-four stator slots, categorized into four medium slots, four large single slots, four large double slots, four large triple slots, four small single slots, and four small double slots. The lamination body is symmetrical from left to right, and the medium, large single, large double, large triple, small single, and small double slot types are mirror-symmetrical.

[0008] There are six types of stator slots. The minimum distances from the bottom of each stator slot to the cutting edge of the lamination are h1, h2, h3, h4, h5, and h6, respectively. The diameters of the bottom of each stator slot are d1, d2, d3, d4, d5, and d6, respectively.

[0009] The upper and lower sections of the stator lamination have rectangular and isosceles trapezoidal cross sections, respectively.

[0010] Furthermore, the bottom diameter of the medium-sized trough is 0.97≤d1≤0.99, and the minimum distance from the bottom of the medium-sized trough to the cutting edge is 1.02≤h1≤1.04; the bottom diameter of the large-sized trough is 0.97≤d2≤0.99, and the minimum distance from the bottom of the large-sized trough to the cutting edge is 1.04≤h2 / ≤1.06.

[0011] Furthermore, the bottom diameter of the large double-groove type is 0.94≤d3≤0.96, and the minimum distance from the bottom of the large double-groove type to the cutting edge is 1.07≤h3≤1.09; the bottom diameter of the large triple-groove type is 0.91≤d4≤0.93, and the minimum distance from the bottom of the large triple-groove type to the cutting edge is 1.1≤h4≤1.12.

[0012] Furthermore, the bottom diameter of the small first-class trough is 0.91≤d5≤0.94, and the minimum distance from the bottom of the small first-class trough to the cutting edge is 1.12≤h5≤1.14; the bottom diameter of the small second-class trough is 0.94≤d6≤0.95, and the minimum distance from the bottom of the small second-class trough to the cutting edge is 1.14≤h6≤1.15.

[0013] The utility model has the following beneficial effects:

[0014] This invention adopts a winding distribution method closer to a sine wave, resulting in a more rational structural design. To avoid problems such as reduced motor load capacity and increased current density caused by shrinking the lamination slot, the stator parallel tooth width Bt1 is changed to (1.06-1.08) times the original, and the chamfer r at the bottom of the lamination slot is designed to be 1.25 times the original. The yoke area is increased to reduce the magnetic flux density of the stator teeth and yoke, thus avoiding the motor magnetic flux density being in the oversaturation range. This can improve the overall performance of the compressor (normal operating conditions, abnormal operating conditions, and safety tests) and the motor thermal attenuation amplitude.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 for Figure 1 This invention provides a comparison of the bottom dimensions of various slot types in the motor stator laminations before and after optimization.

[0018] Figure 2 This is a view showing the minimum distance from the bottom of each slot to the cutting edge before and after optimization of the motor stator laminations of this utility model.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] AA, lamination body; bb, stator teeth; a, medium slot type; b, large slot 1 type; c, large slot 2 type; d, large slot 3 type; e, small slot 1 type; f, small slot 2 type; BB, stator teeth before optimization. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "upper", "middle", "outer", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please see Figure 1 - Figure 2As shown, this utility model is a novel aluminum wire motor lamination developed for cost reduction in water dispenser compressors. It includes a lamination body AA, with a through hole at the center for mounting the motor rotor. Several stator teeth bb protrude evenly from the circumference of the lamination body AA towards the through hole. Each stator tooth bb extends radially along the lamination body, and a stator slot is formed between adjacent stator teeth bb. The bottom of each stator slot is a pear-shaped flat bottom. There are twenty-four stator slots, divided into four medium-sized slots a and four large slots a. Type b, four large two-slot type c, four large three-slot type d, four small one-slot type e, and four small two-slot type f. These six slot types are designed with different slot areas. This can improve the magnetic flux density of the teeth and the saturation point of the magnetic flux density of the yoke, while also making the number of turns of each coil different, so that the magnetomotive force generated by each coil tends to be sinusoidal in space. The lamination body AA is symmetrical from left to right, while the medium slot type a, large one-slot type b, large two-slot type c, large three-slot type d, small one-slot type e, and small two-slot type f are mirror symmetrical.

[0025] There are six types of stator slots. The minimum distances from the bottom of each slot to the cut edge of the lamination are h1, h2, h3, h4, h5, h6, respectively, and the diameters of the bottom of each slot are d1, d2, d3, d4, d5, d6, respectively. Before optimization, the minimum distances from the bottom of each slot to the cut edge of the stator lamination were H1, H2, H3, H4, H5, H6, respectively, and the diameters of the bottoms of each slot were D1, D2, D3, D4, D5, D6, respectively.

[0026] The upper and lower sections of the stator lamination AA are rectangular and isosceles trapezoidal, respectively.

[0027] Among them, the bottom diameter of the medium-sized groove a is 0.97≤d1≤0.99, and the minimum distance from the bottom of the medium-sized groove a to the cutting edge is 1.02≤h1≤1.04; the bottom diameter of the large-sized groove b is 0.97≤d2≤0.99, and the minimum distance from the bottom of the large-sized groove b to the cutting edge is 1.04≤h2 / ≤1.06.

[0028] Among them, the bottom diameter of the large two-groove type c is 0.94≤d3≤0.96, and the minimum distance from the bottom of the large two-groove type c to the cutting edge is 1.07≤h3≤1.09; the bottom diameter of the large three-groove type d is 0.91≤d4≤0.93, and the minimum distance from the bottom of the large three-groove type d to the cutting edge is 1.1≤h4≤1.12.

[0029] Among them, the bottom diameter of the small-sized groove e is 0.91≤d5≤0.94, and the minimum distance from the bottom of the small-sized groove e to the cutting edge is 1.12≤h5≤1.14; the bottom diameter of the small-sized groove f is 0.94≤d6≤0.95, and the minimum distance from the bottom of the small-sized groove f to the cutting edge is 1.14≤h6≤1.15.

[0030] It should be further explained that, compared with the original motor stator laminations, the original four slot types have been changed to six slot types, and the bottom diameter of each slot type has been reduced compared with the original laminations. The tooth width has become (1.06~1.08) times the original, and the bottom rounding corner has been changed to 1.25 times the original. This reduces the slot area and increases the magnetic flux density of the teeth and yoke of the laminations. While reducing the amount of enameled wire used in the motor, it also reduces motor losses. By optimizing the bottom rounding corner, the slot utilization rate has been improved. By adopting a design method where multiple slot types are not equal, a winding turns ratio closer to a sine distribution can be obtained, further improving the adverse effects of noise and vibration, motor overload and underload during motor operation, and reducing the amplitude of motor thermal attenuation.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A novel aluminum wire motor lamination developed based on cost reduction of water dispenser compressors, comprising a lamination body, characterized in that: The lamination body has a through hole for mounting the motor rotor at its center. Several stator teeth protrude evenly from the through hole in the circumferential direction of the lamination body. Each stator tooth extends in the radial direction of the stator lamination. A stator slot is formed between two adjacent stator teeth. The bottom of each stator slot is a pear-shaped flat bottom slot. There are twenty-four stator slots. The stator slots are divided into four medium slots, four large slot 1s, four large slot 2s, four large slot 3s, four small slot 1s, and four small slot 2s. The lamination body is symmetrical from left to right. The medium slots, large slot 1s, large slot 2s, large slot 3s, small slot 1s, and small slot 2s are mirror symmetrical. There are six types of stator slots. The minimum distances from the bottom of each stator slot to the cutting edge of the lamination are h1, h2, h3, h4, h5, and h6, respectively. The diameters of the bottom of each stator slot are d1, d2, d3, d4, d5, and d6, respectively.

2. The novel aluminum wire motor lamination developed based on cost reduction of water dispenser compressors according to claim 1, characterized in that, The upper and lower sections of the stator lamination have rectangular and isosceles trapezoidal cross sections, respectively.

3. The novel aluminum wire motor lamination developed based on cost reduction of water dispenser compressors according to claim 1, characterized in that, The bottom diameter of the medium-sized trough is 0.97≤d1≤0.99, and the minimum distance from the bottom of the medium-sized trough to the cutting edge is 1.02≤h1≤1.04; the bottom diameter of the large-sized trough is 0.97≤d2≤0.99, and the minimum distance from the bottom of the large-sized trough to the cutting edge is 1.04≤h2 / ≤1.

06.

4. The novel aluminum wire motor lamination developed based on cost reduction of water dispenser compressors according to claim 1, characterized in that, The bottom diameter of the large double-groove type is 0.94≤d3≤0.96, and the minimum distance from the bottom of the large double-groove type to the cutting edge is 1.07≤h3≤1.09; the bottom diameter of the large triple-groove type is 0.91≤d4≤0.93, and the minimum distance from the bottom of the large triple-groove type to the cutting edge is 1.1≤h4≤1.

12.

5. The novel aluminum wire motor lamination developed based on cost reduction of water dispenser compressors according to claim 1, characterized in that, The bottom diameter of the small trough is 0.91≤d5≤0.94, and the minimum distance from the bottom of the small trough to the cutting edge is 1.12≤h5≤1.14; the bottom diameter of the small trough is 0.94≤d6≤0.95, and the minimum distance from the bottom of the small trough to the cutting edge is 1.14≤h6≤1.15.

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