Detecting Partial Demagnetization in AFPM Generators by Monitoring Speed and EMF Induced in a Supplemental Winding

In this article, a novel method to detect the partial demagnetization in air-cored permanent-magnet axial-flux generators is proposed. Its principle is to monitor a speed-normalized fault detection signal. This signal depends only on the demagnetization severity, as it was extracted using a flux-sen...

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