Sensorless Control of Brushless DC Motor by Zero-Crossing Detection Pulse Generation with Adaptive Power Factor Control Technique

As the ever-growing art of technology in the field of motor's speed control, the various kinds of methods have been introduced. This research work presents the Sensorless control of the brushless DC motor by finding out the virtual hall signal by determining the zero crossing point in the line voltage. The flip-flop has been employed to generate the virtual hall signal corresponding to the zero crossing points which represent the position of the rotor and starts the commutation. The conventional methods of speed control of the brushless DC motor have numerous setbacks and also very intricate in implementation. This work has introduced a very deep overview of the state-of-the-art sensorless control technique and the integration of the power factor correction into the sensorless control of BLDC motor.