Re: Controllable torque electric motor questions

Tim Wescott writes:

Gearing efficiency _does_ matter at zero RPM. A gearbox's stated
efficiency loss is almost entirely due to frictional losses, which you
need to take into account going from the torque at the motor to the
torque at the shaft.

If nothing's moving then frictional loss is by definition zero.

Maybe you mean, "stiction"?
.