# Encyclopedia Magnetica

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file:pm_curve_shifted_coenergy_-_magnetica_png

Demagnetisation curve from second quadrant can be shifted to the first quadrant in order to calculate coenergy in a system containing a permanent magnet.

The drawing was based on:

• Richard J. Strahan, Energy Conversion by Permanent Magnet Machines and Novel Development of the Single Phase Synchronous Permanent Magnet Motor, PhD thesis, Electrical and Electronic Engineering, University of Canterbury, Christchurch, New Zealand, 1998, p.27-40
pm_curve_shifted_coenergy_-_magnetica.png

You are permitted and indeed encouraged to use this image freely, for any legal purpose including commercial, and with any modifications (the permission is hereby given, so there is no need to ask for it explicitly again), but you MUST always give the following credits:

S. Zurek, Encyclopedia Magnetica, CC-BY-4.0

We would appreciate if you let us know of any use: info@e-magnetica.pl