RECENT EXPERIENCES FI TECH AND ALTERNATORS

PWM is how they regulate LED flashlights too (LED dimmer) . It basically turns it off and on very quickly, like an injector. The faster the duty cycle, the brighter the light up to 100% power output (well maybe not 100% if the circuitry cant handle that). The Davis-craig electric water pump gets rid of the thermostat by way of PWM control of the pump, slow/off when its cold, ramping up to enough flow to maintain 180 or whatever you want. Brushless fan motors on a quad copter drone use this exclusively as there would be no way to control motor sync otherwise.