The common functions of DC fans are as follows:

PWM function: PWM is actually to control the output voltage or current of the circuit by changing the pulse width, so as to achieve the speed control of the motor.

FG speed measurement function: The function of this function is mainly to output a square wave signal from the inside of the fan, and the frequency of the signal represents the speed of the fan, that is to say, the speed of the fan can be read by reading the FG signal.

RD function: By monitoring the level of RD signal to determine whether the fan is running normally or the lock state.

TC temperature control: Monitors the ambient temperature of the fan through the thermistor. Adjust the fan speed according to the temperature.

We can make the fans of these four functions according to the needs of customers. Guangdong Chungfo Electronic Technology Co., Ltd specializes in the production of DC/AC/EC fans, cross-flow fans, motors, wire & cable for more than 20 years, through CE, UL, CUL, TUV, SGS, RoHS and other certifications. Welcome major fan buyers to come to consult and understand.