If winding resistance be monitored, e.g. at intervals by injecting d-current (or only at idle/standstill), then a resistance increase of 30% (or so compared to what was measured during motor/FOC configuration) can be interpreted as "motor is overheating".
I have done some testing with this as it would be very useful, but so far I only got it working reasonably at low speeds. That was without signal injection though. When I spend more time on signal injection for position estimation at 0 speed for salient motors I will have another look.
That would be really cool
Since HFI is working so well, are there any plans to use DC injection to dynamically measure winding resistance for motor temp?
Would be great!
Would be great!