How does a speed controller work?
An ESC (Electronic Speed Control) is a device that controls the speed of the motor by turning the motor on and off. Consider the circuit as a diagram shown. To turn on the motor you disconnect from its plug with Electronic Speed Controller. If you connect and you stop the flow of current and the motor will slow down and eventually stop turning. Proportional throttle control is achieved by varying the amount of time the speed controller is on relative to the amount of time it is off. For example, for 1/2 throttle, the switch in the speed controller is on half the time. In order to achieve smooth throttle response, this switching in the speed controller must occur several times per second. Inexpensive speed controllers typically perform this switching 50 times per second. The reason why 50 times a second was chosen is because this is the rate that control pulses are sent to each servo and the electronics are greatly simplified if this rate is used. This is called frame rate because the E
