How to calculate "flux linkage" between a permanent magnet and a coil?

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jlawley97

Joined Oct 5, 2019
25
I am trying to simulate a permanent magnet AC synchronous motor and I see the term "rotor flux linkage" used and it is used as input for example simulations but do not explain how they got the value. I understand how flux linkage work in a coil at a basic level. But how does this work with an interaction between a permanent magnet and a electromagnet? How can I calculate this? all equations I have seen use ""

Ive linked two examples
from "Permanent magnet synchronous motor dynamic modeling with genetic algorithm performance improvement"
and
"Bearingless Permanent Magnet Synchronous Motor using Independent Control"
 

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