Title :
Enhanced sensorless control of brushless drives using back emf mapping
Author :
Tawadros, Markos ; Rizk, Jamal ; Nagrial, Mahmood
Author_Institution :
Sch. of Eng., Univ. of Western Sydney, Sydney, NSW, Australia
Abstract :
An enhanced inexpensive algorithm is presented in this paper for sensorless control of brushless DC motors (BLDCMs) based on the back EMF (BEMF) sensing techniques. The algorithm determines the switching point of power between phases, which is calculated with reasonable accuracy in simple mathematical equations utilizing the slope of the BEMF which is mapped back to reference values. Simulation of the method is presented for verification. Predictably, this eliminates using speed dependant filters, comparators, and the delays called through look up tables after the detection of the zero crossing point (ZCP).
Keywords :
DC motor drives; brushless DC motors; sensorless machine control; table lookup; back EMF mapping; brushless DC motors; brushless drives; enhanced sensorless control; look up tables; speed dependant filters; switching point; zero crossing point; Books; Delay; Educational institutions; Minimization; BEMF Mapping; BEMF detection; Sensorless control; brushless motor control; component;
Conference_Titel :
Mechanical and Electrical Technology (ICMET), 2010 2nd International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-8100-2
Electronic_ISBN :
978-1-4244-8102-6
DOI :
10.1109/ICMET.2010.5598472
