Demag Compensation Explained - BLHeli_32 ESC

Support my work / pawelspychalski
BLHeli_32 ESC allows you to change many settings without providing detailed information about what they are responsible for. Let's close the gap and explain another one of them: Demag Compensation. What is Demag Compensation, when it should be adjusted, and what exactly it does?
0:00 Intro
1:48 Back-EMF and zero crossing detection
4:40 Why desyncs happens
6:44 Demag Compensation
11:45 Summary
12:28 Outro

[@KCQuadTronX]

thanks for such a detailed and informative video ...see ya in the air !!!!!

[@MCsCreations]

Pretty interesting! Thanks a lot, Pawel!!! 😊 Stay safe there with your family! 🖖😊

[@ThatCrazyGardener86]

Great explainer. Thank you Pawel

[@FPVUniversity]

Glad you liked it!

[@nerdCopter]

+1👍 thank you, always great to get new POV, i'll go back to low & test 💪

[@fpvgirldd4426]

thx

[@TheGeordietheWitchandtheWench]

Morning from Australia, I've been trying to find some info on BL_heli 32, using very low KV motors (80KV) I managed to buy a second hand MicroDrone MD-4-1000!!! (for a very good price) I have flashed the latest 32.9. I am looking for some useful info on setting up the correct parameters... I have motor timing set to AUTO, high PWM set to (by RPM) (PWM low set to 48Hz) should I also decrease the ramp up too? From 50% down to 40%? I just don't want to get a de-sync on such a large copter, props are 2000 euro each, I cannot afford a mistake :-) Thanks for all your efforts.... Simon

[@djengines]

Maybe top end esc's should have a hall sensor and a 36 -1 trigger wheel. This way the esc would not have to predict motor angle or rpm.

[@nikotttin]

I have a small 1102 11500kv motor that only under load goes into a desync and roll of death. Demag is on high. Do you think this could be a case of too much compensation? --- I tried another motor and it does the same... hum... Anyone has an idea?

[@DelaneyKassab]

Does this same information apply to BLHeli S ESCs? I believe there is a demag option for them as well

[@FPVUniversity]

yes

[@machinedred]

My problem is my motor always starts up in wrong direction then corrects itself

[@FPVUniversity]

This looks like a problem with one of the phases. It might be damaged. Check with different ESC

[@machinedred]

@@FPVUniversity would demag comp have any effect ?

[@FPVUniversity]

I don't think so