... 380VAC version, 100% controllable speed by 0-10V/PWM signal input. What is EC Motor? Brushless DC Motor with electronically commutated.What ... 10V and PWM signal.Function: Stepless speed control, CW or CCW rotation; start and stop; speed feedback, Fault alarm, etcCan be customized ... No noise, hall-free, power,etc. power,etc. 230V AC three phase electronically commutated ec fan motor driver controller