Title :
Comparison Between MRLS and MRAS Applied to a Speed Sensorless Induction Motor Drive
Author :
Martins, O.S. ; Camara, H.T. ; Grundling, Hilton A.
Author_Institution :
Centro de Tecnologia, Universidade Fed. de Santa Maria
Abstract :
This paper presents a comparison between two different techniques applied to speed sensorless induction motor drives. The first scheme presents a modified recursive least squares (MRLS) speed estimator while the second one evaluated is the widely known model reference adaptive system (MRAS) speed estimator. Both are used concurrently with a robust model reference adaptive controller (RMRAC) in the speed control loop. In this paper, experimental results for MRLS and MRAS techniques were obtained with fixed point DSP-based (TMS320F2812) setup. State variable filters are employed to obtain the differentiation of the signals for both estimators. The dynamic and steady state characteristics of these two systems are evaluated, including parameter variation and torque disturbances
Keywords :
angular velocity control; digital signal processing chips; induction motor drives; least squares approximations; machine control; model reference adaptive control systems; power filters; robust control; MRAS speed estimator; MRLS speed estimator; TMS320F2812; fixed point DSP-based setup; model reference adaptive system speed estimator; modified recursive least squares speed estimator; parameter variation; robust model reference adaptive controller; speed control loop; speed sensorless induction motor drive; state variable filters; torque disturbances; Adaptive control; Adaptive systems; Filters; Induction motor drives; Least squares approximation; Programmable control; Recursive estimation; Robust control; Sensorless control; Velocity control; DSP; Induction motor; robust adaptive control; sensorless speed control;
Conference_Titel :
Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE
Conference_Location :
Jeju
Print_ISBN :
0-7803-9716-9
DOI :
10.1109/PESC.2006.1712036
