Squirrel-cage motor and squirrel-cage structure of rotor core of squirrel-cage motor
By using plug-in insulated guide strips and secondary cast conductive end rings in cast aluminum rotor cores, the core loss problem caused by cast aluminum is solved, which improves motor efficiency and reduces costs.
Patent Information
- Application Number
- CN202421056949.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The existing parallel silicon steel laminated structure of cast aluminum rotor cores results in low motor efficiency and severe core loss during conduction.
The guide strips with an insulating layer on the surface are assembled onto the core groove by plugging, and a conductive end ring is formed by secondary casting to ensure insulating isolation between the guide strips and the core.
It improves the working efficiency of the motor, has a simple structure and low cost, ensuring the insulation and isolation between the guide bar and the core body.
Smart Images
Figure CN222262452U_ABST
Abstract
Description
Technical field:
[0001] The utility model belongs to the technical field of squirrel cage motors, in particular to a squirrel cage motor and a squirrel cage structure of a rotor iron core thereof. Background technology:
[0002] A cast aluminum rotor, also known as a squirrel cage rotor, is composed of a rotating shaft, an iron core, a guide bar cast in the iron core, and conductive end rings cast at both ends of the iron core. The iron core is composed of a large number of mutually insulated and stacked silicon steel laminations, and the outer wall of the iron core has a number of grooves that are evenly distributed circumferentially and extend axially. Guide bars are formed in the grooves of the iron core by casting aluminum, and the outer side of the guide bar is flush with the outer circumferential surface of the iron core. However, this aluminum casting method will cause the silicon steel laminations of the rotor iron core to be connected in parallel when the guide bar is conductive, resulting in core loss, resulting in low motor efficiency. Summary of the invention:
[0003] The utility model aims to provide a squirrel cage structure of a squirrel cage motor and its rotor core, which uses a plug-in method to assemble a conductive bar with an insulating layer on the surface to a groove of a core body, and uses a secondary casting method to form a conductive end ring, thereby ensuring insulation isolation between the conductive bar and the core body.
[0004] The utility model is achieved in this way:
[0005] A squirrel cage structure of a rotor core comprises an iron core body and a plurality of grooves axially arranged on the outer ring wall of the iron core body, each of the grooves being provided with a conductive bar corresponding to the groove structure, the conductive bar being made of aluminum and having an insulating layer on its surface, conductive end rings being provided on the outer sides of the upper and lower ends of the iron core body, the upper and lower ends of each conductive bar respectively extending outwardly beyond the groove and being connected to the corresponding conductive end ring.
[0006] In the above-mentioned squirrel cage structure of the rotor core, the insulating layer is formed by anodizing the surface of the conductive bar;
[0007] Or the insulating layer is formed by coating insulating paint on the surface of the conductor bar.
[0008] In the above-mentioned squirrel cage structure of the rotor core, the ends of the conductive bars are connected to the corresponding conductive end rings by secondary casting to form an integrated structure.
[0009] Another object of the present utility model is to provide a squirrel cage motor, comprising a squirrel cage structure of a rotor core as described in any one of the above items.
[0010] The outstanding advantages of the utility model compared with the prior art are:
[0011] The utility model has a simple structure, reasonable design and low cost. The conductive bars with an insulating layer on the surface are assembled to the grooves of the core body by plugging, and a conductive end ring is formed by secondary casting, thereby ensuring the insulation isolation between the conductive bars and the core body, and effectively improving the working efficiency of the motor. Description of the drawings:
[0012] Figure 1 It is a three-dimensional diagram of the squirrel cage structure of the utility model.
[0013] In the figure: 1. Conductor bar; 2. Conductive end ring. Specific implementation method:
[0014] The present invention is further described below with reference to specific embodiments. Figure 1 :
[0015] A squirrel cage structure of a rotor core comprises an iron core body and a plurality of grooves axially arranged on the outer ring wall of the iron core body, wherein a conductive bar 1 corresponding to the groove structure is inserted into each of the grooves, the conductive bar 1 is made of aluminum material and an insulating layer is arranged on the surface thereof, conductive end rings 2 are arranged on the outer sides of the upper and lower ends of the iron core body, and the upper and lower ends of each conductive bar 1 extend outwardly outside the groove and are connected to the corresponding conductive end ring 2.
[0016] The utility model has a simple structure, reasonable design and low cost. The conductive bar 1 with an insulating layer on the surface is assembled to the groove of the core body by plugging, and the conductive end ring 2 is formed by secondary casting, which ensures the insulation isolation between the conductive bar 1 and the core body, and effectively improves the working efficiency of the motor.
[0017] In this embodiment, the insulating layer is formed by anodizing the surface of the conductive bar 1;
[0018] Of course, the insulating layer may also be formed by coating insulating paint on the surface of the conductor bar 1 .
[0019] At the same time, the conductor bar 1 can be fixedly connected to the conductive end ring 2 by plugging. In the present embodiment, in order to ensure the stable connection and conductivity between the conductor bar 1 and the conductive end ring 2, the end of the conductor bar 1 is connected to the corresponding conductive end ring 2 by secondary casting to form an integrated structure.
[0020] Another object of the utility model is to provide a squirrel cage motor, comprising the squirrel cage structure of the rotor core.
[0021] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A rotor core squirrel cage structure, comprising a core body and a plurality of grooves axially arranged on an outer ring wall of the core body, characterized in that: A conductive bar (1) corresponding to the groove structure is inserted into each of the grooves. The conductive bar (1) is made of aluminum and has an insulating layer on its surface. Conductive end rings (2) are arranged on the outer sides of the upper and lower ends of the core body. The upper and lower ends of each conductive bar (1) extend outwardly to the outside of the groove and are connected to the corresponding conductive end ring (2).
2. The squirrel cage structure of a rotor core according to claim 1, characterized in that: The insulating layer is formed by anodizing the surface of the conductor bar (1); Or the insulating layer is formed by coating insulating paint on the surface of the conductor bar (1).
3. The squirrel cage structure of a rotor core according to claim 1, characterized in that: The end of the conductive bar (1) is connected to the corresponding conductive end ring (2) by secondary casting to form an integrated structure.
4. A squirrel cage motor, characterized in that: A squirrel cage structure comprising a rotor core as described in any one of claims 1 to 3.