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Transformation method for making motors never have bar breaking fault

A technology of broken bars and motor rotors, applied in the manufacture of motor generators, asynchronous induction motors, electromechanical devices, etc., can solve the problem of no motor broken bars and other problems, and achieve the effects of large starting torque, prevention of broken bars, and good heat dissipation.

Active Publication Date: 2019-10-01
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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  • Transformation method for making motors never have bar breaking fault
  • Transformation method for making motors never have bar breaking fault
  • Transformation method for making motors never have bar breaking fault

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 and figure 2 As shown in the figure, there is a transformation method for a motor that is never broken. The motor rotor 1 is composed of a rotor cage bar 2, an iron core 3 and an end ring 5. The rotor cage bar 2 is inserted into the iron core 3, and the two ends of the iron core 3 are respectively covered with One end ring 5, the rotor cage bar (2) is made of high-precision trapezoidal copper bars made of T2 copper, and the material of the end ring (5) is T2 copper forging.

[0043]The two ends of the rotor cage bar 2 pass through the iron core 3 and are welded with the end ring 5. There is also a tank 9 at the connection between the end ring 5 and the rotor cage bar 2. The rotor cage bar 2 passes through the iron core 3 and is inserted into the pool tank within 9,

[0044] The iron core 3 is formed by laminating several rotor silicon steel sheets 4 , and there are several high-precision guide bar slots 7 corresponding to the rotor cage bars 2 in the...

Embodiment 2

[0048] 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:

[0049] 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;

[0050] 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 3

[0078] Wherein, the rotor silicon steel sheet 4 in the step 2 is made through the following steps:

[0079] Step a: Design the rotor silicon steel sheet 4 of the motor rotor 1, measure according to the required size and make tools such as pressure ring;

[0080] Step b: design the composite mold for the rotor silicon steel sheet 4 according to the drawing, and draw the construction drawing;

[0081] Step c: Make the mold of the rotor silicon steel sheet 4 according to the figure;

[0082] Step d: Punch rotor silicon steel sheet 4 on a large punching machine, the material is DW470-50 cold-rolled silicon steel sheet, and paint;

[0083] 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 transformation method for making motors never have a bar breaking fault, which belongs to the technical field of motors. A motor rotor is composed of rotor cage bars, an ironcore and end rings. The rotor cage bars are inserted into the iron core. Each of the two ends of the iron core is sleeved with one end ring. The rotor cage bars are high-precision trapezoidal copper bars made of T2 red copper. The end rings are T2 red copper forging parts. The rotor cage bars of a trapezoidal copper bar structure can be prevented from being broken because of favorable factors suchas good heat dissipation, effective tightening of the copper bars and large starting torque. By using the rotor cage bars made of high-precision trapezoidal copper bars together with high-precision bar guide slots, the rotor cage bars can be prevented from being broken when the weld seams between the rotor cage bars and the end rings are cracked by shaking due to the loosening of the bar guide slots during the working of the motor.

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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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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