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Sensorless Control of BLDC Motor using Hysteresis Comparator

Nimain Charan Nayak*

Professor, MNM Jain Engineering College, Chennai, India.

Periodicity:April - June'2014
DOI : https://doi.org/10.26634/jee.7.4.2871

Abstract

This paper presents the BrushLess Dc (BLDC) motor sensorless control system. The sensorless techniques are based on a hysteresis comparator, and a potential start-up method with a high starting torque which is suggested. The hysteresis comparator is used to compensate for the phase delay of the back-EMFs due to a Low-Pass Filter (LPF) and also prevent multiple output transitions from noise or ripple in the terminal voltages. The rotor position is aligned at standstill for maximum starting torque without an additional sensor and any information of motor parameters. Also, the stator current can be easily adjusted by modulating the pulse width of the switching devices during the alignment. The life time of the motor is improved by using the sensorless technique.

Keywords

BLDC Motor, Hysteresis Comparator, Sensorless Control

How to Cite this Article?

Nayak, N. C. (2014). Sensorless Control of BLDC Motor Using Hysteresis Comparator. i-manager’s Journal on Electrical Engineering , 7(4), 29-33. https://doi.org/10.26634/jee.7.4.2871

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