Evaluation of methods of speed estimation of asynchronous motor based on direct torque control (DTC)

In this paper two methods of speed estimation of a three phase induction motor system are analyzed. The method of direct torque control with no sensors was used to control the motor system. The mathematical models of the above mentioned methods are analyzed for every case. Following the estimation method analysis of open and closed loop the observation method of closed loop is expanded with the use of deterministic sets. The simulation on the computer of the whole motor system is carried out based on the mathematic models with Matlab/Simulink software. The results of the simulation bring forward the advantages of the expanded method in nonlinear systems.

[1]  Andrzej M. Trzynadlowski,et al.  Control of Induction Motors , 2000 .

[2]  Marian P. Kazmierkowski,et al.  Direct torque control of PWM inverter-fed AC motors - a survey , 2004, IEEE Transactions on Industrial Electronics.

[3]  Kuo-Kai Shyu,et al.  Flux compensated direct torque control of induction motor drives for low speed operation , 2004, IEEE Transactions on Power Electronics.

[4]  G. Adamidis,et al.  Direct torque control using space vector modulation and dynamic performance of the drive, via a fuzzy logic controller for speed regulation , 2007, 2007 European Conference on Power Electronics and Applications.

[5]  T. L. Skvarenina,et al.  The Power Electronics Handbook , 2001 .

[6]  M. Gokasan,et al.  EKF based sensorless direct torque control of IMs in the low speed range , 2005, Proceedings of the IEEE International Symposium on Industrial Electronics, 2005. ISIE 2005..

[7]  J. Amarnath,et al.  Sensorless direct torque control of induction motor based on hybrid space vector pulsewidth modulation to reduce ripples and switching losses-a variable structure controller approach , 2006, 2006 IEEE Power India Conference.

[8]  Mihai Comanescu,et al.  Sliding Mode MRAS Speed Estimators for Sensorless Control of Induction Machine under Improper Rotor Time Constant , 2007, 2007 IEEE International Symposium on Industrial Electronics.

[9]  S. L. Ho,et al.  Speed estimation of an induction motor drive using an optimized extended Kalman filter , 2002, IEEE Trans. Ind. Electron..