The Transformation Method of Motor Never Breaking

A technology for broken bars and motor rotors, which is applied in the manufacture of motor generators, asynchronous induction motors, electromechanical devices, etc., and can solve problems such as no motor broken bars.

Active Publication Date: 2021-07-06
上海电机集团梅山电机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution has the advantage of being able to detect the presence or absence of broken bars simply and intuitively, but no method has been found to prevent the motor from breaking bars

Method used

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  • The Transformation Method of Motor Never Breaking
  • The Transformation Method of Motor Never Breaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, a method for transforming a motor that is never broken, including a motor rotor 1, includes the following steps:

[0040] Step 1: Order high-precision trapezoidal copper bars as the rotor cage bar 2 according to the design plan. The material is T2 copper. According to the design requirements and size of the motor rotor 1, redesign and customize two end rings 5 ​​and iron core 3. The iron core 3 is made of A number of rotor silicon steel sheets 4 are stacked, and the iron core 3 is provided with a number of high-precision guide grooves 7 that are compatible with the rotor cage 2. The material of the end ring 5 is forged T2 copper, and according to the rotor cage 2 The size of the end, the pool groove 9 is gold-processed on the end ring 5;

[0041] In this embodiment, the rotor cage bar 2 made of trapezoidal copper bar structure can effectively prevent broken bars due to good heat dissipation, effective tensioning of the copper bar, and large s...

Embodiment 2

[0069] Wherein, the rotor silicon steel sheet 4 in the step 2 is made through the following steps:

[0070] Step a: Design the rotor silicon steel sheet 4 of the motor rotor 1, design and manufacture the press ring tool according to the required size;

[0071] Step b: design the composite mold for the rotor silicon steel sheet 4 according to the drawing, and draw the construction drawing;

[0072] Step c: Make the mold of the rotor silicon steel sheet 4 according to the figure;

[0073] Step d: Punch the rotor silicon steel sheet 4 on a large punching machine, the material is DW470-50 cold-rolled silicon steel sheet, and paint the rotor silicon steel sheet 4;

[0074] Step e: laminate several rotor silicon steel sheets 4 on a punching machine to form an iron core 3 .

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Abstract

The invention provides a method for reforming a motor for never breaking a sliver, and belongs to the technical field of motors. The rotor of the motor is composed of rotor cage bars, iron core and end rings. The rotor cage bars are inserted into the iron core, and an end ring is set at each end of the iron core. The rotor cage bars are made of high-precision trapezoidal copper bars made of T2 copper. , The material of the end ring and the end ring is forged T2 copper. The rotor cage bar made of trapezoidal copper bar structure has good heat dissipation, the copper bar can be effectively tightened, and the favorable factors such as large starting torque can effectively prevent broken bars. The rotor cage bar made of high-precision trapezoidal copper bar has a high The precision guide bar groove can prevent the rotor cage bar from loosening in the guide bar slot when the motor is working, causing the weld between the rotor cage bar and the end ring to be shaken and broken.

Description

technical field [0001] The invention belongs to the technical field of electric motors, and relates to a method for transforming electric motors without cutting. Background technique [0002] The rotor winding is not made of insulated wires, but aluminum strips or copper strips and short-circuit rings welded or cast. The three-phase asynchronous motor is called a squirrel-cage motor, and the squirrel-cage motor is one of the three-phase asynchronous motors. Three-phase asynchronous motors are divided into squirrel-cage motors and wound-type motors. Many thermal power plants use JSQ high-voltage squirrel-cage motors to drive fans, coal mills and other machinery, and the rotor cage bars often break Accidents, sometimes due to broken cages scratching the stator windings, resulting in great economic losses. [0003] In order to overcome the deficiencies of the prior art, people have proposed various solutions through continuous exploration. For example, a Chinese patent disclos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/00H02K17/16
CPCH02K15/0012H02K17/165H02K2213/03
Inventor 潘利华刘永华郑夫龙
Owner 上海电机集团梅山电机有限公司
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