Core loop test
Core loop test
(OP)
How would you compare a stator core loop test to El Cid test? What are the advantages and disadvantages of both?
Sarg
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
Download nowINTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: Core loop test
Loop test can be somewhat difficult to setup and run. Then again, it may be there is equipment available to run the loop test without special purchase. El Cid is most definitely a special-purpose machine with one use only.
=====================================
Eng-tips forums: The best place on the web for engineering discussions.
RE: Core loop test
"The alternatives to the Electromagnetic test are usually core loss testing, or high power Ring Flux testing using thermal checks or IR imaging to detect defects. The former will fail to pick up small local faults which do not contribute significantly to the loss, but which could still lead to serious local over-heating. In addition no information about fault location is provided.
The latter test has the disadvantage that high voltage and current levels can be needed, time is required to allow local hot-spots to become established, and there is a risk of causing further damage to a defective motor core since the normal motor cooling is not functioning. In addition faults buried in the core may not be evident, and if they are near a conductor slot will affect insulation life.
The Electromagnetic test avoids all these disadvantages and
also has the ability to detect faults in slots with the windings still in place. Further, as the test does not cause any heating and can be repeated on a repair at any time, the effectiveness of repair work can be immediately assessed as it progresses. It may also be applied as a QA check on machines in production, remembering that a 10% over-temperature on winding insulation can reduce its life by 50%."
=====================================
Eng-tips forums: The best place on the web for engineering discussions.
RE: Core loop test
If it is done with a core tester you also can measure watts per pound. That is widely used as a measure of possible core degradation during stripping of stator winding prior to rewind of motors.
=====================================
Eng-tips forums: The best place on the web for engineering discussions.