BLHeil on Emax Budget 18A about blheli HOT 4 CLOSED

The COMP_xx values are not so important, if your motor runs well, you can just leave them.
The P/N FETON_DELAY values are important, because if they are too low you can have high/low side FET cross conduction. You can measure that by looking at gate voltages and output voltages with your scope.
These values are most important for the damped modes.

Good luck,
Steffen

from blheli.

Thank you for the fast response.
I tend to do that measurement with a resistor network attached as load.
Is that a good choice, or can the measurement be done with the motor attached as load?
Thanks a lot
Best Regards
Ralf Brandt

from blheli.

I always do it with a motor as load. But often I put a resistor (a few ohms) in series with the battery plus. That helps protect the ESC (and motor) in case something goes wrong.

from blheli.

Thank you for your support.

I did the measurement, but I had to realize that my old nicolet 310 is to slow for a precise measurement.

What I can see is that the rise and fall time on gate and on the output is definitely below 1us,
on both the high and the low side Mosfet.

What I can also see is that there is a propagation delay of about 2us
from the microcontroller to the Mosfet gate.
But that is the same for raise and fall and the same on high and low side.
This seems to be manly caused by the PUMD12.
But due to the fact that this is the same for raise and fall,
high and low side I thing this can be ignored.

What I can say for sure is that the required P/N FETON_DELAY is less that the 6us found in the XP_35A_SW.inc.

For testing I reduced that values down to 1
and did not see any current spikes in the power line, even with maximum damping.

But on the other hand, I did not see any advantage in reducing these values.
So I decided to use the original XP_35A_SW configuration for my Emax Budget 18A ESCs.

Thanks again that was really a big help.
Best Regards
Ralf Brandt

from blheli.