THE ESC

The ESC for brushed motors is purely that, a speed controller. But for a brushless motor ESC, it is first a "switcher" of battery polarities to the motor, then a speed controller. Speed controllers actually pulses the current with MOSFETS, the faster the pulsing, the more current is allowed to reach the motor. In this manner, no power is wasted as heat as what happened if you merely dropped the voltage/current with a resistor.

Modern ESCs for brushless motors can be programmed. Many newbies do not know this. I found a box thrown away which obviously was for a remote control airplane and guess what, the programming instruction was thrown with the box. Some of the things that can be programmed in the ESC are setting the throttle stick range, identifying what battery you are using, setting quick start or soft start, voltage cut off, current cut off, among others. Cut off problems are sometimes the result parameters set and there is nothing wrong with the ESC or motor or Batt. Related thio this topic is a motor which labeled 2S or 3S. It might as well be labeled up to 3S as there is nothing in the motor which automatically sets it for 2S or 3S. It might run ok with 3S and cuts off with 2S. It is premature to say the label is wrong. If you use a smaller prop, it just might run as well too but of course at a lower power output. Overprop also draws more current which triggers the cut-off when the threshold is reached.


to be continued.....