Sensorless field orientation control of induction machines based ona mutual MRAS scheme
Zhen, L.
Xu, L.
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct 1998
Volume: 45,
Issue: 5
On page(s): 824-831
ISSN: 0278-0046
References Cited: 8
CODEN: ITIED6
INSPEC Accession Number: 6048791
Digital Object Identifier: 10.1109/41.720340
Current Version Published: 2002-08-06
Abstract
A mutual model reference adaptive system (MRAS) is proposed to
implement a position sensorless field-orientation control (FOC) of an
induction machine. The reference model and adjustable model used in the
mutual MRAS scheme are interchangeable. Therefore, it can be used to
identify both rotor speed and the stator resistance of an induction
machine. For the rotor speed estimation, one model is used as a
reference model and another is the adjustable model. Pure integration
and stator leakage inductance are removed from the reference model,
resulting in robust performance in low and high speed ranges. For the
stator resistance identification, the two models switch their roles. To
further improve estimation accuracy of the rotor speed and stator
resistance, a simple on-line rotor time constant identification is
included. Computer simulations and experimental results are given to
show its effectiveness
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