... output, fault alarm, easy to control speed and saving 40% energy We design, develop and supply motor controller ... SPIinterface.Main features of Brushless DC Fan Motor speed controller: Supply Voltage: 12~75VDCMax power: 200WSpeed control: ... ,etc.Applications of Brushless DC Fan Motor speed controller:DC and EC Centrifugal fan, DC and EC ... noise 48V BLDC Fan motor driver or controller with tach output