A HALL SENSOR FAULT COMPENSATION CIRCUIT DEVICE OF BLDC MOTOR AND ITS METHOD

摘要

The present invention relates to a Hall sensor failure compensation circuit device and method thereof in a BLDC motor, and more specifically, as a Hall sensor failure compensation circuit device in a BLDC motor, three Hall sensors from a motor controller that controls driving of the BLDC motor. A clock pulse generation circuit for receiving signals from two Hall sensors operating normally and generating and outputting a clock signal for generating a compensation signal for a faulty Hall sensor; And a compensation signal generator configured to receive a clock signal received from the clock pulse generation circuit and a Hall sensor signal from among two Hall sensor signals operating normally and generate and output a compensation signal of a faulty Hall sensor. It is characterized by the top. According to the Hall sensor failure compensation circuit device and method of the BLDC motor proposed in the present invention, two normally operating when one of the three Hall sensors for detecting the position information of the rotor required for driving the BLDC motor fails. A clock pulse generation circuit that generates a clock signal to generate a compensation signal for a faulty Hall sensor using a Hall sensor signal, a clock signal received from the clock pulse generation circuit, and a Hall sensor with a fast phase among the two Hall sensor signals operating normally By configuring a compensation signal generation unit that receives a signal and generates a compensation signal of a faulty Hall sensor, a faulty Hall sensor signal is generated and compensated, but the charging and discharging rate of the capacitor is increased by increasing the duty, reducing the sensitivity of the circuit, Accordingly, it is possible to further improve the reliability of a faulty Hall sensor signal generated even for a frequency change occurring in a transient section in which the rotational speed of the motor is changed. In addition, according to the Hall sensor fault compensation circuit device and method of the BLDC motor proposed in the present invention, a clock pulse generation circuit including a duplicated decoder, a duplicated full-pass filter, and an AND gate, and a D-flip-flop. By further configuring the compensation signal generator to be implemented, the sensitivity of the circuit is further reduced, enabling accurate compensation of Hall sensor errors in the motor system to which the variable speed BLDC motor is applied, and accordingly, the motor driving system along with stable control of the BLDC motor. Operation reliability can be further improved.