A modular rotor structure for converting a three-phase asynchronous motor into a reluctance motor

Abstract

This utility model provides an assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor, belonging to the field of motor retrofitting technology. It includes multiple stacked rotor laminations, each with shaft holes, multiple magnet holes, and multiple fixing holes, as well as two fixing washers. The rotor laminations include a head lamination, multiple middle laminations, and a tail lamination. The middle laminations have positioning grooves and positioning flanges, and the fixing holes are arranged around the shaft holes, with the positioning flanges also arranged around the fixing holes. The head laminations have positioning flanges, and the tail laminations have positioning grooves. The fixing washers have through holes, and the two fixing washers are respectively fitted onto the front end face of the head lamination and the rear end face of the tail lamination. This assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor improves the motor's efficiency and torque output capability, ensuring good and stable motor performance.

Description

Technical Field

[0001] This utility model belongs to the field of motor modification technology, and more specifically, it relates to an assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor. Background Technology

[0002] In a reluctance motor, the magnetic flux tends to close along the path of least reluctance, generating electromagnetic torque to drive the rotor. When the stator windings are energized, the resulting rotating magnetic field causes the rotor's salient poles to continuously align towards the position of least reluctance, resulting in continuous rotation. Reluctance motors have strong fault tolerance, high energy conversion efficiency, and good dynamic performance, making them widely used in various fields; therefore, refurbishing and converting three-phase asynchronous motors into reluctance motors has significant development potential. However, during the rotor fabrication process, insufficient connection stability between rotor laminations affects the motor's performance. Utility Model Content

[0003] The purpose of this invention is to provide an assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor, so as to solve the technical problem of insufficient connection stability between rotor laminations and reduced performance of reluctance motors in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A modular rotor structure for converting a three-phase asynchronous motor into a reluctance motor is provided, comprising multiple stacked rotor laminations. Each rotor lamination has a shaft hole, multiple magnet holes, and multiple fixing holes, and also includes two fixing washers. The multiple rotor laminations include a head lamination, multiple middle laminations, and a tail lamination. The front and rear end faces of the middle laminations are respectively provided with positioning grooves and positioning flanges. The multiple fixing holes are arranged around the shaft holes, and the positioning flanges are arranged around the fixing holes. The positioning grooves on two adjacent middle laminations cooperate with the positioning flanges for installation. The tail face of the head lamination is provided with a positioning flange, and the front face of the tail lamination is provided with a positioning groove. The fixing washers are provided with through holes corresponding to the multiple fixing holes, and the two fixing washers are respectively fitted onto the front face of the head lamination and the tail face of the tail lamination.

[0005] In one possible implementation, both the front end face of the first end stack and the rear end face of the last end stack are provided with annular grooves, and the two fixing rings are respectively fitted into the two annular grooves.

[0006] In one possible implementation, the depth of the annular groove is greater than or equal to the thickness of the fixing washer.

[0007] In one possible implementation, the fixing ring has a spirally arranged annular structure, and the through hole is formed on the annular structure.

[0008] In one possible implementation, the diameter of the through hole is larger than the diameter of the fixing hole.

[0009] In one possible implementation, the plurality of fixing holes are evenly spaced around the shaft hole.

[0010] In one possible implementation, the fixing ring is an elliptical ring corresponding to the plurality of fixing holes.

[0011] In one possible implementation, the positioning flange is integrally formed with the corresponding first end lamination, multiple middle laminations and end laminations.

[0012] In one possible implementation, the positioning groove is coated with an adhesive layer.

[0013] In one possible implementation, the plurality of the central laminations are divided into three to five groups, and an insulating layer is provided between two adjacent groups of the central laminations.

[0014] The beneficial effects of the modular rotor structure for converting a three-phase asynchronous motor into a reluctance motor provided by this utility model are as follows: Compared with the prior art, the modular rotor structure for converting a three-phase asynchronous motor into a reluctance motor, as described in this utility model, involves first stacking multiple middle laminations sequentially through positioning grooves and positioning flanges to ensure accurate and stable positioning of each middle lamination. During stacking, the fixing holes must be aligned for subsequent fixing operations. Next, the first end lamination is installed by aligning the positioning flange on its rear end face with the positioning groove on the front end face of the first middle lamination, again paying attention to the alignment of the fixing holes. Then, the last end lamination is installed by aligning the positioning groove on its front end face with the positioning flange on the rear end face of the last middle lamination. Finally, two fixing washers are placed on the front end face of the first end lamination and the rear end face of the last end lamination, respectively, so that the through holes on the fixing washers correspond one-to-one with the fixing holes on the rotor laminations. Fasteners are passed through the through holes in the retaining washer and the retaining holes in the rotor laminations to secure the entire first lamination, multiple middle laminations, and the last lamination, ensuring a tight connection between the laminations. After installing suitable magnets in the magnet holes, the magnets and rotor structure work together to better realize the reluctance effect of the motor, improve the motor's efficiency and torque output capability, and ensure that the motor has good and stable performance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art 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.

[0016] Figure 1 A front view of the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor, provided in an embodiment of this utility model.

[0017] Figure 2 A cross-sectional view of the front end stack provided in an embodiment of this utility model;

[0018] Figure 3 A cross-sectional view of the middle stacked pieces provided in an embodiment of this utility model;

[0019] Figure 4 A cross-sectional view of the end laminations provided in an embodiment of this utility model;

[0020] Figure 5 A schematic diagram illustrating the connection between the assembled rotor structure and the shaft for converting a three-phase asynchronous motor into a reluctance motor according to an embodiment of this utility model. Figure 1 ;

[0021] Figure 6 A schematic diagram illustrating the connection between the assembled rotor structure and the shaft for converting a three-phase asynchronous motor into a reluctance motor according to an embodiment of this utility model. Figure 2 .

[0022] The following are the labeling elements in the figure:

[0023] 10. Rotor laminations; 11. Shaft hole; 12. Magnet hole; 13. Fixing hole; 14. Insulation layer; 20. Fixing washer ring; 21. Through hole; 22. Fastener; 30. First end laminations; 31. Middle laminations; 32. End laminations; 33. Positioning groove; 34. Positioning flange; 35. Annular groove; 40. Rotating shaft. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Please see Figures 1 to 6 The present invention will now describe the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor. A modular rotor structure for converting a three-phase asynchronous motor into a reluctance motor includes multiple stacked rotor laminations 10. Each rotor lamination 10 has a shaft hole 11, multiple magnet holes 12, and multiple fixing holes 13, and also includes two fixing washers 20. The multiple rotor laminations 10 include a first end lamination 30, multiple middle laminations 31, and a last end lamination 32. The front and rear end faces of the middle laminations 31 are respectively provided with positioning grooves 33 and positioning flanges 34. The multiple fixing holes 13 are arranged around the shaft hole 11, and the positioning flanges 34 are arranged around the fixing holes 13. The positioning grooves 33 on two adjacent middle laminations 31 are fitted with the positioning flanges 34. The rear end face of the first end lamination 30 is provided with a positioning flange 34, and the front end face of the last end lamination 32 is provided with a positioning groove 33. The fixing washers 20 are provided with through holes 21 corresponding to the multiple fixing holes 13, and the two fixing washers 20 are respectively fitted on the front end face of the first end lamination 30 and the rear end face of the last end lamination 32.

[0029] The three-phase asynchronous motor modified into a reluctance motor using a modular rotor structure provided by this utility model, compared with the prior art, involves first stacking multiple middle laminations 31 sequentially through positioning grooves 33 and positioning flanges 34 during installation, ensuring accurate and stable positioning of each middle lamination 31. During stacking, the fixing holes 13 must be aligned for subsequent fixing operations. Next, the first end lamination 30 is installed by aligning the positioning flange 34 on its rear end face with the positioning groove 33 on the front end face of the first middle lamination 31, again ensuring the alignment of the fixing holes 13. Then, the last end lamination 32 is installed by aligning the positioning groove 33 on its front end face with the positioning flange 34 on the rear end face of the last middle lamination 31. Finally, two fixing washers 20 are placed on the front end face of the first end lamination 30 and the rear end face of the last end lamination 32, respectively, ensuring that the through holes 21 on the fixing washers 20 correspond one-to-one with the fixing holes 13 on the rotor laminations 10. Fasteners 22 are used to pass through the through holes 21 on the fixing washer 20 and the fixing holes 13 on the rotor laminations 10, thereby securing the entire first lamination 30, multiple middle laminations 31, and the last lamination 32, ensuring a tight connection between the laminations. After installing suitable magnets in the magnet holes 12, the magnets and rotor structure cooperate with each other to better realize the reluctance effect of the motor, improve the efficiency and torque output capability of the motor, and ensure that the motor has good and stable performance.

[0030] Please see Figures 1 to 4 As a specific embodiment of the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor provided by this utility model, annular grooves 35 are provided on the front end face of the first lamination 30 and the rear end face of the last lamination 32. Two fixing washers 20 are respectively fitted into the two annular grooves 35. During installation, the fixing washers 20 are pressed into the annular grooves 35, and the through holes 21 on the fixing washers 20 are aligned with the fixing holes 13 and arranged coaxially. The fixing washers 20 make the entire rotor structure more stable and reliable, so that the motor can work efficiently.

[0031] Please see Figure 1 , Figure 2 and Figure 4 As a specific embodiment of the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor provided by this utility model, the depth of the annular groove 35 is greater than or equal to the thickness of the fixing pad ring 20; in this way, the fixing pad ring 20 is completely located within the annular groove 35 and does not protrude beyond the rotor lamination 10.

[0032] As a specific embodiment of the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor provided by this utility model, the fixing washer 20 has a spirally arranged annular structure, and the through hole 21 is opened on the annular structure; the fixing washer 20 with this method has a certain elasticity, which buffers the external pressure to a certain extent and thus achieves the function of preventing loosening, so that the fastener 22 has a better fixing effect on the rotor lamination 10.

[0033] Preferably, the diameter of the through hole 21 is larger than the diameter of the fixing hole 13, which facilitates the installation of the fastener 22, reduces the installation difficulty, and simplifies the installation steps.

[0034] Please see Figure 1 As a specific embodiment of the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor provided by this utility model, multiple fixing holes 13 are evenly arranged around the shaft hole 11. When multiple fasteners 22 are used for fixing, the force on the first end lamination 30, multiple middle laminations 31 and the end lamination 32 is uniform, which improves the installation stability of the entire rotor structure.

[0035] Please see Figure 1 As a specific embodiment of the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor provided by this utility model, the fixing ring 20 is an elliptical ring corresponding to the plurality of fixing holes 13. Since the shaft hole 11 is provided with a keyway for connecting with the rotating shaft 40, when the plurality of fixing holes 13 are arranged around the shaft hole 11, in order to make better use of space, the centers of the plurality of fixing holes 13 are arranged on the same ellipse without increasing the area of ​​the rotor lamination 10. Similarly, by setting the fixing ring 20 as an elliptical ring corresponding to the plurality of fixing holes 13, the plurality of through holes 21 on the fixing ring 20 are accurately aligned with the plurality of fixing holes 13.

[0036] Please see Figures 1 to 4 As a specific embodiment of the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor provided by this utility model, the positioning flange 34 is integrally formed with the corresponding first end lamination 30, multiple middle laminations 31 and end laminations 32; making the connection between the positioning flange 34 and the first end lamination 30, middle laminations 31 and end laminations 32 more solid, and significantly improving stability and strength.

[0037] Please see Figures 2 to 4 As a specific embodiment of the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor provided by this utility model, an adhesive layer is applied to the positioning groove 33 so that when the positioning flange 34 is installed in the positioning groove 33, the connection between the positioning flange 34 and the middle lamination 31 and the end lamination 32 is more reliable. Similarly, an adhesive layer can be applied to the inner and outer walls of the positioning flange 34.

[0038] Please see Figure 6 As a specific embodiment of the assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor provided by this utility model, multiple middle laminations 31 are divided into three to five groups, and an insulating layer 14 is provided between adjacent groups of middle laminations 31. In this way, the rotor laminations 10 are formed into a segmented structure, and the insulating layer 14 between adjacent rotor laminations 10 is used to block the axial eddy current path. Preferably, the insulating layer 14 is a polyimide film.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular rotor structure for converting a three-phase asynchronous motor into a reluctance motor, comprising a plurality of rotor laminations installed in a stack, said rotor laminations being provided with a shaft hole, a plurality of magnet holes, and a plurality of fixing holes, characterized in that, It also includes two fixing washers; the plurality of rotor laminations include a first end lamination, a plurality of middle laminations and a last end lamination, the front and rear end faces of the middle laminations are respectively provided with positioning grooves and positioning flanges, the plurality of fixing holes are arranged around the shaft hole, and the positioning flanges are arranged around the fixing holes, the positioning grooves on two adjacent middle laminations are fitted with the positioning flanges; the rear end face of the first end lamination is provided with a positioning flange, the front end face of the last end lamination is provided with a positioning groove, the fixing washers are provided with through holes corresponding to the plurality of fixing holes, and the two fixing washers are respectively fitted with the front end face of the first end lamination and the rear end face of the last end lamination.

2. The modular rotor structure for converting a three-phase asynchronous motor into a reluctance motor according to claim 1, characterized in that, Both the front end face of the first end stack and the rear end face of the last end stack are provided with annular grooves, and the two fixing washers are respectively fitted into the two annular grooves.

3. The assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor as described in claim 2, characterized in that, The depth of the annular groove is greater than or equal to the thickness of the fixing washer.

4. The assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor as described in claim 1, characterized in that, The fixing ring has a spirally arranged annular structure, and the through hole is formed on the annular structure.

5. The assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor as described in claim 4, characterized in that, The diameter of the through hole is larger than the diameter of the fixing hole.

6. The assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor as described in claim 1, characterized in that, The plurality of fixing holes are evenly spaced around the shaft hole.

7. The assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor as described in claim 6, characterized in that, The fixing washer ring is an elliptical ring corresponding to the plurality of fixing holes.

8. The assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor as described in claim 1, characterized in that, The positioning flange is integrally formed with the corresponding first end stack, multiple middle stacks and the end stack.

9. The assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor as described in claim 1, characterized in that, An adhesive layer is applied to the positioning groove.

10. The assembled rotor structure for converting a three-phase asynchronous motor into a reluctance motor as described in claim 1, characterized in that, The plurality of the central laminations are divided into three to five groups, and an insulating layer is provided between two adjacent groups of the central laminations.

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