What is it about?
This paper proposes a sensorless procedure to estimate the induction motor speed and the dependable heat contents of the stator and rotor sides. The proposed procedure is based on the electrical models of a three phase Induction Motor (IM). The motor electrical models for normal and abnormal will be discussed and a technique is introduced for accommodating frequency dependent skin effect of the rotor resistance using a simple proposed speed estimation algorithm.
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Why is it important?
This paper investigated two enhanced thermal motor protection schemes. These schemes were developed on the basis of electrical models for normal and abnormal operation with the aid of positive and negative sequence networks. The proposed schemes consider the slip dependent on rotor parameters.
Perspectives
Writing this article was a great pleasure as it has co-authors with whom I have had long standing collaborations. The proposed algorithms in this paper can be easily generalized for different applications as irrigation application, waste water plants and industrial factories with urgent limitations on the motor operation. It gives high accurate method to detect the normal and abnormal conditions (thermally) with minimal cost and on-line detection. With some modifications on the output (interface), it can give the proper action to motor (alarm- stop).
mohamed abdelwanis
Kafrelsheikh University
Read the Original
This page is a summary of: An Efficient Sensorless Slip Dependent Thermal Motor Protection Schemes Applied to Submersible Pumps, International Journal of Engineering Research in Africa, March 2015, Trans Tech Publications,
DOI: 10.4028/www.scientific.net/jera.14.75.
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