Hiroyuki Sano, JSOL Corp.
It has been reported that punching causes remnant stress and deteriorates magnetic properties of the electromagnetic steel sheets used in rotating machines.
How to incorporate effects of residual strain in analysis models is an important issue in accuracy improvements of loss analysis.
A single sheet test was run to measure the amount of degradation in magnetic properties and loss properties using electromagnetic steel sheets degraded due to cutting, and attempted modeling in electromagnetic field analysis.
This presentation will report on evaluation results for the material modeling method and effects of loss due to punching.