I've built a simple robot that can move. I'm using brushless motors. I've realized that at slow speeds the motors pull a lot of current. I didn't understand the power / current / efficiency charts when I started. I see it in the charts, now, that the efficiency in electric motors is at high RPM and the low speed torque is awesome but comes at a price of high current.
For mobile robots, do people generally just provide high-current batteries for slow speeds, ignore slow speeds, or do they build robots with variable transmissions instead of fixed gearboxes? When I look around I just see designs with fixed gearboxes but I feel like I'm missing something.
If I look beyond hobby type projects I see talk about CVT and the Inception drive but I'm wondering anyone at the home / hobbiest level do anything like that.