Squirrel cage rotor winding and rotor

Abstract

The utility model discloses a squirrel cage rotor winding and rotor belong to motor field, including two end rings and a plurality of guide bars, and the both ends of each guide bar are fixedly connected with the two end rings respectively, a plurality of guide bars are parallel to each other, and the gap is formed between the two adjacent guide bars, characterized by: the squirrel cage rotor winding further includes reinforcing ribs, the number of reinforcing ribs is multiple, and the end of each reinforcing rib is connected with the end of guide bar and the end face of end ring, and the upper and lower ends of each guide bar are all equipped with reinforcing ribs, through setting reinforcing rib, increase the connecting strength of guide bar and end ring, make guide bar and end ring not easy to deform, and the connecting part resistance of guide bar and end ring is reduced by reinforcing rib, avoids the short circuit caused by guide bar melting.

Description

Technical Field

[0001] This utility model relates to the field of electric motors, and in particular to squirrel-cage rotor windings and rotors including the aforementioned squirrel-cage rotor windings. Background Technology

[0002] An electric motor consists of a stator and a rotor, with the rotor being the rotating part of the motor. The working principle of the motor rotor is based on the principles of electromagnetic induction and electromagnetic force. When the stator is energized and generates a rotating magnetic field, the conductors (windings or squirrel cage bars) in the rotor are induced with current in the magnetic field. These induced currents interact with the stator magnetic field to generate electromagnetic torque, thereby causing the rotor to start rotating.

[0003] During the manufacturing of squirrel-cage rotors, the conductor bars and end rings are cast from aluminum in a single process. In existing rotor winding structures, the conductor bars are directly connected to the inner end face of the aluminum ring. During rotor use, excessive centrifugal force can cause the conductor bars to break and the end rings to deform. Furthermore, the connection between the conductor bars and the aluminum ring is a region with high resistance. Uneven current distribution or poor heat dissipation can cause the conductor bars to melt, resulting in a short circuit. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of this utility model is to provide a squirrel-cage rotor winding with conductor bars and end rings that are not easily deformed and with low resistance at the connection.

[0005] In order to overcome the shortcomings of the prior art, the second objective of this utility model is to provide a rotor with guide bars and end rings that are not easily deformed and with low resistance at the connection.

[0006] One of the objectives of this utility model is achieved through the following technical solution:

[0007] A squirrel-cage rotor winding includes two end rings and multiple guide bars. Each guide bar is fixedly connected to two end rings at both ends. The multiple guide bars are parallel to each other, and a gap is formed between adjacent guide bars. The squirrel-cage rotor winding also includes multiple reinforcing ribs. Each reinforcing rib is connected to the end of the guide bar and the end face of the end ring. Each guide bar has reinforcing ribs at both its upper and lower ends.

[0008] Furthermore, the reinforcing rib extends along the axial direction of the squirrel-cage rotor winding.

[0009] Furthermore, the reinforcing rib, the end ring, and the guide strip are integrally formed.

[0010] Furthermore, the cross-section of the reinforcing rib is tapered.

[0011] Furthermore, the longitudinal section of the reinforcing rib is rectangular.

[0012] Furthermore, the end of the reinforcing rib furthest from the guide bar is arc-shaped.

[0013] Furthermore, the two end rings are parallel to each other, and the multiple reinforcing ribs are arranged in two groups. One group of reinforcing ribs is located on the bottom surface of the top end ring, and the other group of reinforcing ribs is located on the top surface of the bottom end ring. The two groups of reinforcing ribs are located on the two circles respectively.

[0014] Furthermore, both sets of reinforcing ribs are located inside the guide strip.

[0015] Furthermore, the cross-section of the end ring is a right-angled trapezoid.

[0016] The second objective of this utility model is achieved by the following technical solution:

[0017] The rotor includes an iron core, which has multiple through winding slots. Each winding slot has a clearance slot at both ends, which is connected to the winding slot. The rotor also includes any of the above-mentioned squirrel-cage rotor windings. The guide bar is located in the clearance slot, the reinforcing rib is located in the clearance slot, and the end ring covers the end of the iron core.

[0018] Compared with the prior art, the squirrel-cage rotor winding of this utility model also includes reinforcing ribs. There are multiple reinforcing ribs, and each reinforcing rib is connected to the end of the guide bar and the end face of the end ring. Each guide bar has reinforcing ribs at both the upper and lower ends. By setting reinforcing ribs, the connection strength between the guide bar and the end ring is increased, making the guide bar and the end ring less prone to deformation. At the same time, the reinforcing ribs reduce the resistance of the connection between the guide bar and the end ring, preventing the guide bar from melting and causing a short circuit. Attached Figure Description

[0019] Figure 1 This is a perspective view of the rotor of this utility model;

[0020] Figure 2 for Figure 1 An exploded view of the rotor;

[0021] Figure 3 for Figure 2 A three-dimensional sectional view of the rotor's iron core;

[0022] Figure 4 for Figure 2 A three-dimensional sectional view of the squirrel-cage rotor winding of the rotor;

[0023] Figure 5 for Figure 1 A three-dimensional sectional view of the rotor.

[0024] In the diagram: 10. Iron core; 11. Winding slot; 12. Recessed slot; 13. Mounting hole; 20. Squirrel-cage rotor winding; 21. End ring; 22. Conductor bar; 23. Reinforcing rib. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please see Figures 1 to 5 The rotor of this utility model includes an iron core 10 and a squirrel-cage rotor winding 20, which is formed by casting molten aluminum onto the iron core 10.

[0029] The iron core 10 is provided with mounting holes 13, winding slots 11, and clearance slots 12. The mounting holes 13 are located on the axis of the iron core 10 and are used to mount a rotating shaft, allowing the iron core 10 to drive the rotating shaft to output power. The winding slots 11 are through slots extending from one end of the iron core 10 to the other. There are multiple winding slots 11 arranged circumferentially around the iron core 10. The winding slots 11 form guide bars 22. Each winding slot 11 has clearance slots 12 at both ends, which communicate with the winding slots 11. The shape of the clearance slots 12 corresponds to that of the reinforcing ribs 23, and the clearance slots 12 form the reinforcing ribs 23.

[0030] The squirrel-cage rotor winding 20 includes two end rings 21, multiple conductor bars 22, and multiple reinforcing ribs 23. The two end rings 21, multiple conductor bars 22, and multiple reinforcing ribs 23 are fixedly connected and, in this embodiment, are integrally formed. The end rings 21 have a circular annular protrusion structure; specifically, the cross-section of the end rings 21 is a right-angled trapezoid. The two end rings 21 are spaced apart and parallel to each other. The multiple conductor bars 22 are located between the two end rings 21 and connected to them. Specifically, the multiple conductor bars 22 are parallel to each other and spaced apart, and are located on a circle. Each conductor bar 22 has its two ends fixedly connected to the two end rings 21.

[0031] The reinforcing rib 23 is located at the connection between the end of the guide bar 22 and the end ring 21. One side of the reinforcing rib 23 is connected to the end ring 21, and the other side is connected to the guide bar 22. The reinforcing rib 23 has a block-like structure, with a conical cross-section and a rectangular longitudinal section. The reinforcing rib 23 extends along the axial direction of the iron core 10. The end of the reinforcing rib 23 that is laterally away from the guide bar 22 is arc-shaped. Multiple reinforcing ribs 22 are arranged in two groups. One group of reinforcing ribs 22 is located on the bottom surface of the top end ring 21, and the other group of reinforcing ribs 22 is located on the top surface of the bottom end ring 21. The two groups of reinforcing ribs 23 are located on the two circles respectively. Both groups of reinforcing ribs 23 are located inside the guide bar 22.

[0032] When manufacturing the rotor, the iron core 10 is placed in the mold, and molten aluminum is poured into the iron core 10. The molten aluminum forms end rings 21 at the top and bottom of the iron core 10. The end rings 21 cover both ends of the iron core 10. Conductor bars 22 are formed in the winding slots 11, and reinforcing ribs 23 are formed in the clearance slots 12. The reinforcing ribs 23 increase the connection strength between the conductor bars 22 and the end rings 21, making the conductor bars 22 and the end rings 21 less prone to deformation. At the same time, the reinforcing ribs 23 reduce the resistance of the connection between the conductor bars 22 and the end rings 21, preventing the conductor bars 22 from melting and causing a short circuit.

[0033] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. A squirrel-cage rotor winding, comprising two end rings and multiple conductor bars, wherein each conductor bar is fixedly connected at both ends to two end rings respectively, the multiple conductor bars are parallel to each other, and a gap is formed between adjacent conductor bars, characterized in that: The squirrel-cage rotor winding also includes reinforcing ribs, and there are multiple reinforcing ribs. Each reinforcing rib is connected to the end of the guide bar and the end face of the end ring. Each guide bar has reinforcing ribs at both its upper and lower ends.

2. The squirrel-cage rotor winding according to claim 1, characterized in that: The reinforcing rib extends along the axial direction of the squirrel-cage rotor winding.

3. The squirrel-cage rotor winding according to claim 1, characterized in that: The reinforcing rib, the end ring, and the guide strip are integrally formed.

4. The squirrel-cage rotor winding according to claim 1, characterized in that: The cross-section of the reinforcing rib is conical.

5. The squirrel-cage rotor winding according to claim 1, characterized in that: The longitudinal section of the reinforcing rib is rectangular.

6. The squirrel-cage rotor winding according to claim 1, characterized in that: The reinforcing rib is arc-shaped at the end furthest from the guide bar.

7. The squirrel-cage rotor winding according to claim 1, characterized in that: The two end rings are parallel to each other, and the multiple reinforcing ribs are arranged in two groups. One group of reinforcing ribs is located on the bottom surface of the top end ring, and the other group of reinforcing ribs is located on the top surface of the bottom end ring. The two groups of reinforcing ribs are located on the two circles respectively.

8. The squirrel-cage rotor winding according to claim 7, characterized in that: Both sets of reinforcing ribs are located inside the guide strip.

9. The squirrel-cage rotor winding according to claim 1, characterized in that: The cross-section of the end ring is a right trapezoid.

10. A rotor, comprising an iron core, said iron core having a plurality of through winding slots, characterized in that: Each winding slot is further provided with a clearance slot at both ends, the clearance slot is connected to the winding slot, the rotor further includes a squirrel cage rotor winding as described in any one of claims 1-9, the guide bar is located in the clearance slot, the reinforcing rib is located in the clearance slot, and the end ring covers the end of the iron core.

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