METHOD FOR DRIVING SENSOR-LESS BRUSHLESS DC MOTOR AND DEVICE OF THE SAME

摘要

PURPOSE: A method for driving sensor-less BLDC(brushless direct current) motor and a device of the same are provided to remove a vibration of a motor by preventing a phase due to an open loop driving from being taken in starting a fan motor. CONSTITUTION: A position detection unit(21) detects a position of a rotor in a BLDC motor(20). A rate control unit(22) controls a rate of the BLDC motor(20) in comparison with an appointed rate. A mode transformation unit(23) selects a driving of circuit in an analog mode or a digital mode. An analog driving unit(24) performs the driving of circuit in the analog mode. A digital driving unit(25) performs the driving of circuit in the digital mode. A driving signal generation unit(26) generates a reference signal for switching a power of an inverter unit(10) on/off. A gate driver(27) drives the inverter unit(10) through the switching signal generated in the driving signal generation unit(26).