The HG Diagram Model for Induction Motors Analysis: Theoretical Approach and Applications
Title:
The HG Diagram Model for Induction Motors Analysis: Theoretical Approach and Applications
Author:
Benbouzid, M. E. H.
Appeared in:
Electric power components & systems
Paging:
Volume 31 (2003) nr. 3 pages 211-239
Year:
2003-03
Contents:
This article presents theory and applications of a practical approach for induction motors modeling under temperature and saturation effects. This approach is based on the so-called HG diagram that is established from the induction motor measurement analysis of the active and reactive power consumption for each operating point. In practice, this diagram is a circle plotted in the complex plane. The distinct feature of this circle is its diameter that is time-varying with the induction motor temperature and saturation states. In fact, these two effects are both interfering and conjugate, and only an online plotted circle will allow taking them into account. Since the HG diagram is characterized by three parameters, especially the rotor ones, it constitutes an interesting tool to achieve the identification of online motor parameters. This possibility has led us to apply this diagram for induction motor control and faults diagnosis, especially in the rotor. Moreover, it can easily be applied for modeling saturation, which will refine the control and diagnosis processes. Computer simulations and experimental tests, carried out on a 4-kW and a 0.75 four-pole squirrel cage induction motors, provide an encouraging validation of the HG diagram applications. The results obtained clearly point out the distinct features, simplicity and accuracy, of the proposed approach.
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