Title :
A sensorless direct speed control for brushless DC motor drives
Author :
Noroozi, Mohammad Ali ; Moghani, Javad Shokrollahi ; Dehnavi, A.
Author_Institution :
Electr. Eng. Dept., Amirkabir Univ. of Technol., Tehran, Iran
Abstract :
This paper presents the groundwork for a novel concept of sensorless direct speed control (SDSC) in brushless DC (BLDC) motor drives. Unlike the conventional sensorless speed controls, the proposed strategy does not need proportional plus integral (PI) regulators. Thus feedback mechanism is minimized. Speed regulation is achieved by controlling rotational speed of stator flux linkage. The PI regulator is replaced with a simple comparator. The BLDC motor is excited based on a look-up table. This proposal is applicable to both two-phase and three-phase conduction modes of the BLDC motors. In this paper, principles of the proposed sensorless strategy and speed ripple calculation are described in details. The validity of this claim is verified through the simulation results.
Keywords :
DC motor drives; PI control; angular velocity control; brushless DC motors; feedback; sensorless machine control; table lookup; BLDC motor drives; PI regulators; SDSC; brushless DC motor drives; feedback mechanism; look-up table; proportional plus integral regulators; rotational speed control; sensorless direct speed control strategy; speed regulation; speed ripple calculation; three-phase conduction modes; two-phase conduction modes; Couplings; Estimation; Reliability theory; Switches; Brushless DC motor; Direct speed control; PI controller; Sensoless speed drive;
Conference_Titel :
Power Electronics, Drive Systems and Technologies Conference (PEDSTC), 2013 4th
Conference_Location :
Tehran
Print_ISBN :
978-1-4673-4481-4
Electronic_ISBN :
978-1-4673-4483-8
DOI :
10.1109/PEDSTC.2013.6506667
