Question for Patrick

[Pdelcast]

Originally Posted by lutach

There were a few guys at the track who are racers and couldn't understand why it was getting that hot. I'll wait for Patrick to give an answer of what is the max RPM for a 6 pole motor.

It's not the max RPM (commutation limit) that is at issue here. It's the fact that the recirculation currents are continuing (probably) almost all the time -- this is VERY hard on the ESC, as all the body diodes on all the FETs will be conducting for a significant amount of time.

Again, I would be surprised if you can ever get a 6 pole 9200Kv motor working well. That's just not a good idea.



We tested some of the CC Neu motors to destruction the other day, and the MMM had no issues running a 4 pole motor at 150,000 RPM. So commutation frequency maximum isn't the issue here.

Have you tried it with low timing? That might help reduce the recirculation currents somewhat.

But I still don't think a 9200Kv 6 pole is a good idea. 2 pole is pushing it with a 36mm motor and 9200Kv...