Cage type high-voltage motor wound rotor structure

Abstract

The utility model belongs to the technical field of transforming a rotor of a high-voltage wound rotor asynchronous motor into a cage type rotor, in particular to a cage type high-voltage motor wound rotor structure, which comprises a rotating shaft, a rotor iron core assembly is rotatably connected onto the rotating shaft, and a plurality of rotor grooves are annularly arranged on the rotor iron core assembly. According to the utility model, vibration and noise during operation of the motor can be reduced through the proper rotor slots, the operation stability of the motor is improved, the service life of the motor is prolonged, the performance requirements of starting current, starting torque, maximum torque, slip ratio and the like of the motor can be met through the proper design of the rotor slots, the motor can stably operate under various working conditions, and the service life of the motor is prolonged. The conducting rods and the end rings can ensure smooth circulation of current in the cage type winding, reduce energy loss and improve the operation efficiency of the motor, so that the aim of improving the starting torque of the motor is fulfilled, on the premise of ensuring various parameters of the motor, the processing time is saved, for example, the rotating shaft part is basically fixed, only the iron core and the winding part are redesigned, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transforming the rotor of a high-voltage wound-rotor asynchronous motor into a cage-type rotor, and specifically relates to a cage-type high-voltage motor wound-rotor structure. Background Technique

[0002] A 5900kW motor in a large steel plant is an oxygen generator motor. The original motor is a wound-rotor asynchronous motor. When starting, a water resistance is connected in series with the rotor to obtain a better starting torque by changing the rotor resistance. Due to engineering transformation, the motor is required to start directly. This requires replacing the motor, increasing the cost. Therefore, we propose a cage-type high-voltage motor wound-rotor structure to solve the above problems. Content of the Utility Model

[0003] (I) Technical Problems to be Solved

[0004] Aiming at the deficiencies of the prior art, the utility model provides a cage-type high-voltage motor wound-rotor structure, which solves the problems raised in the above background technique.

[0005] (II) Technical Solutions

[0006] The utility model specifically adopts the following technical solutions to achieve the above purpose:

[0007] A cage-type high-voltage motor wound-rotor structure includes a rotating shaft, a rotor core assembly is rotatably connected to the rotating shaft, a plurality of rotor slots are annularly formed on the rotor core assembly, a conducting bar is arranged on the rotor slot, both ends of the conducting bar are fixedly connected with end rings, a stator is sleeved on the rotor core assembly, and a plurality of conducting bars are fixedly connected to the rotor core assembly.

[0008] Further, the distances between the plurality of rotor slots are equal.

[0009] Further, the conducting bar is made of red copper material.

[0010] Further, a plurality of rotor blades are annularly and fixedly connected to the other side of the end ring.

[0011] (III) Beneficial Effects

[0012] Compared with the prior art, the utility model provides a cage-type high-voltage motor wound-rotor structure, which has the following beneficial effects:

[0013] The utility model helps to reduce the vibration and noise during the operation of the motor through appropriate rotor slots, improves the running stability and service life of the motor. The appropriate rotor slot design can meet the performance requirements such as starting current, starting torque, maximum torque and slip ratio of the motor, ensuring the stable operation of the motor under various working conditions. The conducting bars and end rings can ensure the smooth flow of current in the cage winding, reduce energy loss and improve the operating efficiency of the motor. Thus, aiming at improving the starting torque of the motor and on the premise of ensuring the parameters of the motor, the processing time is saved. For example, the shaft part remains basically unchanged, only the core and winding parts are redesigned, reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic three-dimensional structure diagram of the utility model;

[0015] Figure 2 is a partial schematic three-dimensional structure diagram of the utility model;

[0016] Figure 3 is a schematic three-dimensional structure diagram of the rotor core assembly of the utility model.

[0017] In the figure: 1, shaft; 2, rotor core assembly; 3, rotor slot; 4, stator; 5, rotor fan; 6, conducting bar; 7, end ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0019] Such as Figures 1-3As shown in the figure, a cage-type high-voltage motor wound rotor structure proposed by an embodiment of the present utility model includes a rotating shaft 1, a rotor core assembly 2 is rotatably connected to the rotating shaft 1, a plurality of rotor slots 3 are annularly formed on the rotor core assembly 2, a conducting bar 6 is provided on the rotor slot 3, both ends of the conducting bar 6 are fixedly connected with end rings 7, a stator 4 is sleeved on the rotor core assembly 2, and a plurality of conducting bars 6 are fixedly connected to the rotor core assembly 2. Appropriate rotor slots 3 help to reduce the vibration and noise during the operation of the motor, improve the running stability and service life of the motor. Appropriate rotor slot 3 design can meet the performance requirements such as starting current, starting torque, maximum torque and slip ratio of the motor, and ensure that the motor can operate stably under various working conditions. The conducting bar 6 and the end ring 7 can ensure the smooth flow of current in the cage winding, reduce energy loss, and improve the operating efficiency of the motor. Thus, aiming at improving the starting torque of the motor and on the premise of ensuring the parameters of the motor, the processing time is saved. For example, the rotating shaft 1 part remains basically unchanged, only the iron core and winding parts are redesigned, and the cost is reduced.

[0020] In some embodiments, the spacing between the plurality of rotor slots 3 is equal. When the spacing between the rotor slots 3 is equal, the electromagnetic induction and current distribution in each slot during the operation of the motor will be more uniform. This helps the motor to maintain a relatively consistent electromagnetic torque and starting performance in each operating stage, improving the stability and reliability of the motor. The uniform slot spacing can reduce the vibration and noise generated by the uneven electromagnetic force during the operation of the motor. This can not only improve the running stability of the motor, but also reduce the noise pollution and improve the working environment. The uniformity of the slot spacing can reduce the additional losses during the operation of the motor, such as parasitic torque, etc., which helps to reduce the temperature rise of the motor, improve the operating efficiency and service life of the motor.

[0021] In some embodiments, the conducting bar 6 is made of red copper material. Red copper is a metal material with good electrical conductivity, and its conductivity is as high as about 5.85 million Siemens per meter, which is almost the same as that of pure copper and is almost an ideal conductor. Therefore, using red copper as the material of the conducting bar 6 can ensure that the motor has a lower resistance during operation, reduce energy loss, and improve energy utilization efficiency.

[0022] In some embodiments, a plurality of rotor airfoils 5 are fixedly connected in a ring shape on the other side of the end ring 7. The presence of the rotor airfoils 5 can significantly enhance the heat dissipation effect of the motor. During the operation of the motor, due to the passage of current and electromagnetic action, certain heat will be generated. The rotor airfoils 5 can accelerate the air flow inside the motor through rotation, effectively take away the heat, reduce the temperature rise of the motor, and ensure that the motor can operate normally in a high-temperature environment.

[0023] Working principle or structural principle. During use, an appropriate rotor slot 3 helps reduce vibration and noise during motor operation, improves the running stability and service life of the motor. An appropriate design of the rotor slot 3 can meet the performance requirements such as starting current, starting torque, maximum torque, and slip ratio of the motor, ensuring stable operation of the motor under various working conditions. The conducting bar 6 and end ring 7 can ensure smooth current flow in the cage winding, reduce energy loss, and improve the operating efficiency of the motor. The design of the rotor fan 5 can accelerate the air flow inside the motor, help the motor dissipate heat, and ensure normal operation of the motor even in a high-temperature environment. Thus, aiming at improving the starting torque of the motor and on the premise of ensuring various parameters of the motor, processing time is saved. For example, the shaft 1 part remains basically unchanged, only the core and winding parts are redesigned, reducing costs.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cage-type high-voltage motor winding rotor structure, comprising a rotating shaft (1), characterized in that: A rotor core assembly (2) is rotatably connected to the rotating shaft (1), a plurality of rotor slots (3) are provided in an annular shape on the rotor core assembly (2), a conductive rod (6) is provided on the rotor slot (3), both ends of the conductive rod (6) are fixedly connected to end rings (7), a stator (4) is sleeved on the rotor core assembly (2), and a plurality of conductive rods (6) are fixedly connected to the rotor core assembly (2).

2. A cage-type high-voltage motor winding rotor structure according to claim 1, characterized in that: The spacings between the plurality of rotor slots (3) are equal.

3. The cage-type high-voltage motor winding rotor structure according to claim 1, characterized in that: The conductive rod (6) is made of copper.

4. The cage-type high-voltage motor winding rotor structure according to claim 1, characterized in that: The other side of the end ring (7) is fixedly connected to a plurality of rotor blades (5) in a ring shape.

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