A ℌ∞-based approach for sensorless control of BLDC motors fed with four-switch inverters Online publication date: Wed, 08-Feb-2023
by Nouha Triki; Mohamed Abbes; Souad Chebbi
International Journal of Power Electronics (IJPELEC), Vol. 17, No. 2, 2023
Abstract: This paper presents the design and the implementation of a cost-effective sensorless control strategy for brushless DC motors fed with a four-switch inverter. In this method, a ℌ∞-controller was designed to control phase currents. A disturbance observer is used to estimate the back-EMFs of the rotor. These variables were used as the inputs of a phase locked loop to estimate the rotor position. The performances of this system were validated through simulation results. It was shown that the rotor speed remains close to the desired reference and the estimated angle is synchronised with the actual back-EMF. Compared with existing solutions, the proposed method allows the limitation of switching losses by the removal of the hysteresis controllers and the possibility to use standard driver circuits with internally set deadtime. Finally, an experimental prototype was built to verify the correctness of the presented control method.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Power Electronics (IJPELEC):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook