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

fYear

2006

fDate

18-22 June 2006

Firstpage

1

Lastpage

6

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE

Conference_Location

Jeju

ISSN

0275-9306

Print_ISBN

0-7803-9716-9

Type

conf

DOI

10.1109/PESC.2006.1712036

Filename

1712036