Title :
Sensorless drive of brushless DC motor with 180-degree commutation
Author :
Hu, Boyang ; Sathiakumar, Swamidoss ; Shrivastava, Yash
Author_Institution :
Sch. of Electr. & Inf. Eng., Univ. of Sydney, Sydney, NSW, Australia
Abstract :
To drive trapezoidal back-EMF type of brushless DC motor, for 120-degree commutation, the winding without phase current in each conduction interval can be considered as a sensor for back-EMF detection. However, in the case of 180-degree commutation, the back-EMF detection can not be realized because all the three windings are driven with current. Sensorless algorithm of indirect back-EMF determination is necessary to be used. In this paper, 180-degree commutation gate switching pattern is analysed. An enhanced sensorless algorithm is developed for 180-degree commutation. PWM soft chopping technique is carried out for supplied voltage adjustment. The simulation results based on Matlab/Simulink prove that the proposed sensorless drive of 180-degree commutation works properly.
Keywords :
DC motor drives; brushless DC motors; choppers (circuits); commutation; PWM soft chopping technique; back-EMF detection; brushless DC motor sensorless drive; commutation gate switching pattern; Australia; Brushless DC motors; Communication system control; Commutation; Engineering management; Pattern analysis; Phase detection; Pulse width modulation; Sensorless control; Torque; 180-degree commutation; BLDC motor; sensorless;
Conference_Titel :
Computing, Communication, Control, and Management, 2009. CCCM 2009. ISECS International Colloquium on
Conference_Location :
Sanya
Print_ISBN :
978-1-4244-4247-8
DOI :
10.1109/CCCM.2009.5267812
