The PWM controller is a small and inexpensive component that controls the speed of the puller. To mount the control panel, I chose a switch that allows you to turn the puller on and off at the set speed.
The advantage of the PWM controller is that it does not regulate voltage and current by its resistance, but only by the frequency of switching current and voltage on and off. This means that at low speeds, the torque (engine speed) does not decrease, but really only the number of revolutions per minute while maintaining the same torque.
Watch Video how to assemble PWM with Puller and Power Supply