Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for testing a bar winding of a rotor of a rotating electrical machine

A technology of rotating electrical machines and rod-shaped windings, applied in the direction of measuring electricity, electric components, measuring electrical variables, etc., can solve problems such as current distribution asymmetry, torque swing, temperature difference, etc., to improve reliability, avoid local overload, optimize running effect

Inactive Publication Date: 2015-11-25
SIEMENS AG
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This aging can lead to breakage of the connection points, which ultimately renders the motor unusable
[0006] In addition, different rod resistances and transition resistances at the connection points lead to asymmetries in the current distribution in the rotor, which can lead to local temperature differences at the rotor surface or can generate torque swings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for testing a bar winding of a rotor of a rotating electrical machine
  • Method for testing a bar winding of a rotor of a rotating electrical machine
  • Method for testing a bar winding of a rotor of a rotating electrical machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] figure 1 The rotor cage 10 of a rotor 20 of an asynchronous machine without a laminated core is shown in a schematic perspective view, wherein the rotor cage 10 has bars 12 which are each electrically conductively connected at the ends to a short-circuit ring 14 . Currently, both the rod 12 and the short-circuit ring 14 are formed from a copper alloy and the rod 12 is welded, welded or cast on the short-circuit ring 14 on the end side. from figure 2 In the schematic side view of the rotor cage 10 in , it can be seen that the individual rods 12 protrude slightly at the end side through the corresponding short-circuit ring 14 .

[0051] figure 2 In addition to the rotor cage 10 , a laminated core 16 is shown, which consists of insulating electrical steel sheets, which are arranged in a stacked manner to form the laminated core 16 . The laminated core 16 has grooves, not shown, in which the rods 12 are arranged.

[0052] If a rotor structured in this way is subjected...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The method involves rotating a rotor at a speed that is lower than a limit frequency of a thermal radiation sensor divided by multiple bars of the bar winding. The thermal radiation of the rotor is detected by the thermal radiation sensor. The thermal radiation sensor is sampled at a sampling frequency that is higher than the speed of the rotor multiplied by the bars, where the sampled values of the thermal radiation sensor are evaluated. An independent claim is included for a device for testing a bar winding of a rotor of a rotating electrical machine.

Description

technical field [0001] The invention relates to a method for testing a bar winding of a rotor of a rotating or linearly moving electrical machine, wherein the thermal radiation of the rotor is detected by means of a thermal radiation sensor arranged in the stator of the rotating electrical machine. Furthermore, the invention relates to a device for testing a bar winding of a rotor of a rotating electrical machine, having a thermal radiation sensor arranged in the stator of the rotating electrical machine, by means of which thermal radiation sensor the thermal radiation of the rotor can be detected. Background technique [0002] An electric machine is a device that converts electrical energy into mechanical energy, especially kinetic energy (motor operation) and / or mechanical energy into electrical energy (generator operation). A rotating electric machine is an electrical machine in which the stator presents a generally circular opening in which the rotor is rotatably support...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02K11/00H02K15/00G01R31/34G01R13/08H02K17/16
CPCG01K13/08G01R31/343H02K11/0047H02K15/00H02K17/16H02K11/25G01R31/346
Inventor 于尔根·策特纳克里斯蒂安·德格托马斯·舒曼
Owner SIEMENS AG