State Space Modeling and Simulation of Sensorless Control of Brushless DC Motors Using Instantaneous Rotor Position Tracking

2007 ◽  
Author(s):  
Salaheddin A. Zabalawi ◽  
Adel Nasiri
Keyword(s):  
Modeling And Simulation ◽  
State Space ◽  
Sensorless Control ◽  
Position Tracking ◽  
Brushless Dc Motors ◽  
Rotor Position ◽  
Brushless Dc ◽  
Dc Motors ◽  
Space Modeling ◽  
State Space Modeling

scholarly journals Position- and Velocity-Sensorless Control of Cylindrical Brushless DC Motors Driven by Sinusoidal Current at Low Speed Using Eddy Current

2003 ◽  
Vol 123 (6) ◽  
pp. 762-763 ◽  
Author(s):  
Hiroshi Takashima ◽  
Mutuwo Tomita ◽  
Zhiqian Chen ◽  
Mitsuhiko Satoh ◽  
Shinji Doki ◽  
...  
Keyword(s):  
Eddy Current ◽  
Sensorless Control ◽  
Brushless Dc Motors ◽  
Low Speed ◽  
Brushless Dc ◽  
Dc Motors ◽  
Sinusoidal Current

scholarly journals On Stability of Open-Loop Operation without Rotor Information for Brushless DC Motors

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Zhong Wu ◽  
Haotun Lyu ◽  
Yongli Shi ◽  
Di Shi
Keyword(s):  
Theoretical Analysis ◽  
Operation Mode ◽  
Open Loop ◽  
Control Mode ◽  
Open Loop Control ◽  
Brushless Dc Motors ◽  
Loop Control ◽  
Rotor Position ◽  
Brushless Dc ◽  
Dc Motors

Open-loop operation mode is often used to control the Brushless DC Motors (BLDCMs) without rotor position sensors when the back electromotive force (EMF) is too weak due to the very low rotor velocity. The rotor position information is not necessary in this mode and the stator windings are supplied with voltages under a certain ratio of the amplitude to the frequency. However, the rotor synchronization will be destroyed once if the commutation instant is inappropriate. In order to improve the reliability of the open-loop operation mode, a dynamic equation is established to represent the synchronization error between the rotor and the stator. Thereafter, the stability of the open-loop control mode is analyzed by using Lyapunov indirect method. Theoretical analysis indicates that the open-loop control mode is asymptotically stable only when the commutation instant of the stator current lags behind the ideal one suitably. Finally, theoretical analysis is verified through the experimental results of a certain BLDCM.

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