NEUTRAL VOLTAGE COMPENSATION-BASED BLDC MOTOR CONTROL SYSTEM AND CONTROLLING METHOD THEREOF

摘要

PURPOSE: A neutral voltage compensation-based BLDC motor control system and a controlling method thereof are provided to control correctly the rotation of the BLDC motor by estimating accurately a position of a rotor and compensating a neutral point voltage on the basis of the position of the rotor. CONSTITUTION: A neutral voltage compensation-based BLDC motor control system includes a plurality of switches(Q1-Q6), a position estimation information generator(500), and a controller(600). The switches(Q1-Q6) are used for switching the current applied to the BLDC motor. The position estimation information generator(500) is used for generating the position estimation information to compensate a position of a rotor on the basis of output signals of the switches(Q1-Q6) and an output signal of the rotor of the BLDC motor. The controller(600) is used for controlling operations of the switches(Q1-Q6).