Quote:
Originally Posted by BrianG
Is the fact that higher frequencies are harder on the ESC attributed to the losses in switching on the FETs, or the effect of motor inductance/high F on the FETs?
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Switching losses are most of it.
Higher switching frequencies require higher dV/dT (and consequently, higher dI/dT) on the FETs, which is harder on the FETs.
Also, inductance effects are significantly more difficult to manage at high switching frequencies -- so wire lengths, routing, etc. all have a significant effect on ESC efficiency at high switching frequencies.