Abstract
A measuring device for testing electrical steel sheets within the frequency range 0 ≤ f ≤ 400 Hz is described. The hysteresis loop and the magnetization curve are recorded by an X-Y graphical recorder, the digitized measured values concerning the range of magnetizing force, flux density and losses (Wm -3) are displayed and printed out. The principle of data acquisition, a new-type digitizing method for dynamic hysteresis loops and the principle for measuring quasi-static characteristics are described. The configuration and reliability of the measuring device have turned out well in an in-plant research laboratory during an 18 month period.
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