... signal input. What is EC Motor? Brushless DC Motor with electronically commutated.What is the important part in EC ... , such as Supply voltage range, No noise, hall-free, power,etc.Applications: External rotor motor, centrifugal fan, centrifugal blower, ... as Supply voltage range, No noise, hall-free, power,etc. power,etc. 230V AC three phase electronically commutated ec fan motor driver controller