Rotor and stator structure of motor

Abstract

The utility model provides a rotor and stator structure of a motor, which comprises a stator and a rotor, the rotor comprises an iron core and cast aluminum, the stator is of an annular structure, a shaft hole matched with the rotor is arranged in the center of the stator, a plurality of stator grooves are uniformly distributed on the stator close to the inner edge of the shaft hole, and the stator grooves are communicated with the iron core. A slot bottom with a plane structure is arranged on one side, far away from the shaft hole, of the stator slot, a slot opening is formed in one side, close to the shaft hole, of the stator slot, the width of the slot opening is A, the value of A is 2.5 mm, the outer diameter of the stator is D, the diameter of the shaft hole is d1, the value of D is 203 mm, and the value of d1 is 122 mm; 44 rotor slots are uniformly distributed on the iron core close to the outer edge; according to the motor, the structure of the stator groove is improved, the groove opening is enlarged, wire inserting operation is better, the stator groove is changed into the groove bottom of a plane structure from the round bottom, the starting torque of the motor is increased, the copper consumption is less, the number of the rotor grooves in the rotor is increased, and the noise of the motor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically, to a rotor and stator structure of a motor. Background Art

[0002] In the design of traditional asynchronous motors, the structures and manufacturing processes of the stator and rotor have a direct impact on the efficiency and noise level of the motor. The stator usually adopts an annular structure, and multiple stator slots for winding are provided along its inner edge. The rotor includes an iron core and a cast aluminum part. Traditional stator slots mostly adopt a round-bottom slot design. Although this design has certain advantages, it also has some disadvantages. For example, more consumables are used during the winding process, the manufacturing cost is relatively high, and the starting torque of the motor is relatively low. In addition, the slot width is relatively narrow, which brings difficulties to the winding process. Moreover, the structure of the iron core and cast aluminum on the rotor and its cooperation with the stator are also crucial for the overall performance of the motor. If the casting port forming part of the cast aluminum poured onto the iron core on the rotor is not reasonably designed, the cast aluminum part may be incomplete, which may affect the electrical conductivity and thermal performance of the motor. Summary of the Utility Model

[0003] In view of this, the utility model provides a rotor and stator structure of a motor.

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

[0005] A rotor and stator structure of a motor, including a stator and a rotor. The rotor includes an iron core and cast aluminum. The stator is an annular structure, and a shaft hole matching the rotor is provided in the center. A plurality of stator slots are evenly distributed along the inner edge of the stator close to the shaft hole. The stator slot has a flat-bottom structure on the side away from the shaft hole, and a slot opening is provided on the side of the stator slot close to the shaft hole. The width of the slot opening is A, and the value of A is 2.5 mm. The outer diameter of the stator is D, the diameter of the shaft hole is d1, the value of D is 203 mm, and the value of d1 is 122 mm. 44 rotor slots are evenly distributed at positions close to the outer edge of the iron core.

[0006] In a preferred technical solution, a slot tooth is formed between every two stator slots on the stator, and the width of the slot tooth is B, and the value of B is 5.5 mm.

[0007] In a preferred technical solution, slot shoulders are provided on both sides of the stator slot close to one end of the shaft hole, and the width of the slot shoulder is C, and the value of C is 1.5 mm.

[0008] In a preferred technical solution, the stator and the iron core are respectively formed by overlapping and stamping a plurality of punching sheets with the same shape.

[0009] In a preferred technical solution, the cast aluminum is formed by pouring molten aluminum onto an iron core, and the cast aluminum is provided with a plurality of gating forming parts. The diameter of the top of the gating forming part is E, and the value of E is 5 mm.

[0010] In a preferred technical solution, the cast aluminum forms an annular aluminum ring part. The outer diameter of the aluminum ring part matches the iron core, and the inner diameter of the aluminum ring part is F, and the value of F is 83 mm.

[0011] In a preferred technical solution, a shaft installation hole penetrating the upper and lower parts is provided at the center of the rotor.

[0012] As can be seen from the above technical solutions, compared with the prior art, the present utility model has the following beneficial technical effects:

[0013] The motor improves the structure of the stator slots through the stator. The slot opening is enlarged to make the wire embedding operation easier. The bottom of the stator slot is changed from a round bottom to a flat structure, which increases the starting torque of the motor, reduces the copper consumption, increases the number of rotor slots on the rotor, reduces the motor noise, enlarges the gating forming part of the cast aluminum to make the cast aluminum more full, reduces the motor temperature rise, and increases the motor energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0015] Figure 1 It is a top view structural schematic diagram of the stator.

[0016] Figure 2 It is a compound structural schematic diagram of the iron core.

[0017] Figure 3 For Figure 1 Partial enlarged structural schematic diagram of

[0018] Figure 4 It is a top view structural schematic diagram of the rotor.

[0019] Reference numerals in the drawings: 100, stator; 200, rotor; 210, iron core; 220, cast aluminum; 110, shaft hole; 120, stator slot; 121, bottom of the slot; 122, slot opening; 211, rotor slot; 130, slot tooth; 123, slot shoulder; 221, gating forming part; 222, aluminum ring part; 230, shaft installation hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present invention in a schematic manner, and therefore only showing the components related to the present invention.

[0021] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0022] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0023] For the rotor and stator structure of a motor, please refer to Figures 1-4 , which includes a stator 100 and a rotor 200. The rotor 200 includes an iron core 210 and cast aluminum 220. The stator 100 is a ring structure, and a shaft hole 110 matching the rotor 200 is provided in the center thereof. A plurality of stator slots 120 are evenly distributed along the inner edge of the stator 100 near the shaft hole 110. The stator slots 120 are used for winding groups. A flat-bottomed structure of the slot bottom 120 is provided on the side of the stator slot 120 away from the shaft hole 110. The flat-bottomed structure of the slot bottom 120 makes the stator slot 120 form a flat-bottomed groove type. The two sides of the slot bottom 120 are arc-connected and extend towards the direction close to the shaft hole 110. Compared with the arc-shaped slot bottom of the conventional round-bottomed slot, the flat-bottomed structure of the slot bottom 120 can increase the starting torque of the motor, and because the flat-bottomed structure of the slot bottom 120 makes the accommodating space in the stator slot 120 less, the amount of winding is reduced, and the cost is saved; a slot opening 122 is provided on the side of the stator slot 120 close to the shaft hole 110. The slot opening 122 makes the stator slot 120 form an opening, so that copper wire or aluminum wire can be embedded into the stator slot 120 through the slot opening 122 during winding. The width of the slot opening 122 is A, and the value of A is 2.5 mm. Compared with the width of 2.2 mm of the original national standard, the width of the slot opening 122 is increased, which is convenient for the copper wire to be embedded into the stator slot 120 through the slot opening 122 during winding.

[0024] Furthermore, the outer diameter of the stator 100 is D. The outer diameter of the stator 100 is the linear distance between the outer edges of the two ends of its linear connection center. The diameter of the shaft hole 110 is d1. The diameter of the shaft hole 110 is the distance between the two ends of the slot openings passing through the center of the shaft hole 110. The value of D is 203 mm, and the value of d1 is 122 mm. Eleven rotor slots 211 are evenly distributed at positions near the outer edge on the iron core 210. Between every two stator slots 120 on the stator 100, there is a slot tooth 130 formed. The width of the slot tooth 130 is B, and the value of B is 5.5 mm. On both sides of one end of the stator slot 120 close to the shaft hole 110, there are slot shoulders 123 formed on the slot tooth 130. The width of the slot shoulder 123 is C, and the value of C is 1.5 mm. The slot shoulders 123 on both sides of the stator slot 120 are symmetrical, and its width is the vertical distance from the upper end to the lower end farthest from the center of the stator slot 120. As shown in Table 1, the current data are the structural values adopted for the stator and rotor in the present invention, while the original data are the structural data of the existing ones. In the current data, by changing the values of the inner diameter d1, outer diameter D, slot openings, etc., and through the cooperation and assembly of the rotor 200 and the stator 100 to form a motor for use and testing, the efficiency of the present invention has been increased from 65% to 69%, and the noise has been reduced from the original 62 db to 52 db, achieving the reduction of the noise generated during the operation of the motor and the improvement of the efficiency of the motor.

[0025] Table 1:

[0026] Name Original data Current data Outer diameter D (mm) 200 203 Inner diameter d1 (mm) 120 122 d1 / D 0.6 0.6 Yoke width (mm) 15.5 17 Tooth width (mm) 5 5.5 Slot opening (mm) 2.2 2.5 Slot shoulder (mm) 1.7 1.5 Number of rotor slots 40 44 Efficiency (%) 65 69 Noise (db) 62 52

[0027] Furthermore, the stator 100 and the iron core 210 are respectively formed by stamping a plurality of punching sheets with the same shape. Generally, silicon steel sheets are used to stamp a plurality of punching sheets according to the shapes of the stator and the iron core 210. After the punching sheets are laminated according to the design requirements, they are riveted or welded into shape. The cast aluminum 220 is formed by pouring molten aluminum on the iron core 210. The motor of the present invention is an asynchronous motor. Therefore, the rotor needs to perform a cast aluminum process in the rotor slots 211 to form the conductive part. A shaft installation hole 230 penetrating the upper and lower parts is provided at the center of the rotor 200. The shaft installation hole 230 is formed on the iron core 210 and is used to install the shaft. Copper wires or aluminum wires are wound in the slot openings 122 on the stator 100 to form the winding of the stator 100. Generally, after winding, insulation treatment is also required. When the rotor 200 and the stator 100 are processed, they are assembled into the motor housing to produce an integral motor.

[0028] Furthermore, the cast aluminum 220 is provided with a plurality of gating forming parts 221. The iron core 210 is in the mold. After the molten aluminum is poured from the gate of the mold and cooled, it forms the solid cast aluminum 220. The gating forming parts 221 correspond to the gates of the mold. The diameter of the top of the gating forming part 221 is E, and the value of E is 5 mm. The cast aluminum 220 forms an annular aluminum ring part 222. The structure of the aluminum ring part 222 corresponds to the mold structure during the formation of the cast aluminum 220. The outer diameter of the aluminum ring part 222 matches that of the iron core 210, which is also 122 mm. The inner diameter of the aluminum ring part 222 is F, and the value of F is 83 mm. Compared with the past, the inner diameter of the aluminum ring part 222 is smaller. With the correspondingly larger gating forming part 221, it is convenient for the molten aluminum to be poured into the mold to form the cast aluminum 220. When the diameter of the top of the gating forming part 221 is small, it means that the gate of the mold is small, and the molten aluminum enters the rotor slot 211 of the iron core 210 slowly. The molten aluminum is prone to cooling, resulting in the overall insufficient fullness of the cast aluminum 220, and problems such as greater noise and insufficient torque compensation in the motor. Therefore, the improvement of the enlarged gating forming part 221 in cooperation with the aluminum ring part 222 makes the overall cast aluminum 220 more full, the motor has a lower temperature rise, and the motor efficiency is increased.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotor and stator structure of a motor, comprising a stator (100) and a rotor (200), wherein the rotor (200) comprises an iron core (210) and cast aluminum (220), characterized in that: The stator (100) is an annular structure, and an axial hole (110) matching the rotor (200) is provided at the center thereof. A plurality of stator slots (120) are evenly distributed on the inner edge of the stator (100) near the axial hole (110). A slot bottom (121) with a planar structure is provided on the side of the stator slot (120) away from the axial hole (110). A notch (122) is provided on the side of the stator slot (120) near the axial hole (110). The width of the notch (122) is A, and the value of A is 2.5 mm. The outer diameter of the stator (100) is D, and the diameter of the axial hole (110) is d1, and the value of D is 203 mm, and the value of d1 is 122 mm. 44 rotor slots (211) are evenly distributed on the core (210) near the outer edge.

2. The rotor and stator structure of a motor according to claim 1, characterized in that: A slot tooth (130) is formed between every two stator slots (120) on the stator (100), and the slot tooth (130) has a width B, and the value of B is 5.5 mm.

3. The rotor and stator structure of a motor according to claim 1, characterized in that: The stator slot (120) is provided with slot shoulders (123) on both sides of one end close to the shaft hole (110), and the slot shoulders (123) have a width of C, and the value of C is 1.5 mm.

4. The rotor and stator structure of a motor according to claim 1, characterized in that: The stator (100) and the iron core (210) are respectively formed by overlapping and punching a plurality of punching sheets of the same shape.

5. The rotor and stator structure of a motor according to claim 1, characterized in that: The cast aluminum (220) is formed by pouring molten aluminum onto the iron core (210). The cast aluminum (220) is provided with a plurality of pouring gate forming parts (221). The diameter of the top of the pouring gate forming part (221) is E, and the value of E is 5 mm.

6. The rotor and stator structure of a motor according to claim 1, characterized in that: The cast aluminum (220) is formed with an annular aluminum ring portion (222), the outer diameter of the aluminum ring portion (222) matches the iron core (210), the inner diameter of the aluminum ring portion (222) is F, and the value of F is 83 mm.

7. The rotor and stator structure of a motor according to claim 1, characterized in that: The center of the rotor (200) is provided with a rotating shaft mounting hole (230) penetrating the upper and lower parts thereof.

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