Control circuit for brushless direct current fan motor has full range of operational and protective functions

摘要

A control unit (10) with the aid of external devices provides operational control of the motor (13). These include a protection against reverse rotation and voltage drop circuit (1), a Hall effect device (11) for determining the rotor position and motor operational status. and magnetic noise suppression (1b), a negative temperature coefficient temperature sensor (12) to control the fan output to match the room temperature.