Data logging details?

[BrianG]

Wow, color me surprised!

That instrumentation amplifier must have some SERIOUS resolution to be able to detect the voltage across the shunt at lower currents. At 1A, that's only 125uV.

By the way, how are you determining what is a short circuit vs just a really high current surge from a tall geared setup, especially since you are looking for very fast response times (those burst currents can get really high for a couple ms)?

[Pdelcast]

Originally Posted by BrianG

By the way, how are you determining what is a short circuit vs just a really high current surge from a tall geared setup, especially since you are looking for very fast response times (those burst currents can get really high for a couple ms)?

Pretty easy actually -- we just set maximum PWM values based on the integral of the amplitude of partial throttle currents. This limits maximum power dissipation on the transistors.