A speed estimator for sensorless vector control of induction machines in the field weakening region

2002 ◽  
Author(s):  
E. Levi ◽  
Mingyu Wang
Keyword(s):  
Vector Control ◽  
Induction Machines ◽  
Field Weakening ◽  
Sensorless Vector Control ◽  
Speed Estimator

Design of an adaptive observer for sensorless vector control of induction machines under regenerating conditions

2003 ◽  
Vol 145 (4) ◽  
pp. 78-87 ◽  
Author(s):  
Yuichi Tamura ◽  
Ikuya Sato ◽  
Hisao Kubota ◽  
Hisayoshi Ohta ◽  
Yoichi Hori
Keyword(s):  
Vector Control ◽  
Induction Machines ◽  
Adaptive Observer ◽  
Sensorless Vector Control

scholarly journals An Improved MRAS Based Sensorless Vector Control Method for Wind Power Generator

2012 ◽  
Vol 10 (5) ◽  
Author(s):  
B. Dumnic ◽  
V. Katic ◽  
V. Vasic ◽  
D. Milicevic ◽  
M. Delimar
Keyword(s):  
Vector Control ◽  
Control Method ◽  
Induction Generator ◽  
Rotor Speed ◽  
Parameter Mismatch ◽  
Sensorless Vector Control ◽  
Energy Conversion Systems ◽  
Wind Power Generator ◽  
Speed Estimator ◽  
Squirrel Cage Induction Generator

This paper describes an improved sensorless vector control strategy for a squirrel cage induction generator used invariable speed wind energy conversion systems (WECS). The main goal is to design a robust control algorithmimmune to generator parameter variations. In order to estimate the rotational speed of the induction generator, amodel reference adaptive system (MRAS observer) is used. It is shown that a generator parameter mismatch has agreat influence on the rotor speed estimation. In order to estimate the speed accurately, the generator statorresistance must be identified at the same time to correct the mismatched resistance value used in the observer. Theproposed rotor speed estimator with parallel stator resistance identification is first verified by computer simulation.Finally, the experiment is conducted in order to verify the obtained simulation results. It is proved that this controlscheme can enhance the efficiency of a variable speed WECS.

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