Transient Modeling of Squirrel-Cage Induction Machine Considering Air-Gap Flux Saturation Harmonics
Xiaoping Tu; Dessaint, L.-A.; Champagne, R.; Al-Haddad, K.
Industrial Electronics, IEEE Transactions on
Volume 55, Issue 7, July 2008 Page(s):2798 - 2809
Digital Object Identifier   10.1109/TIE.2008.925644
Summary:A transient model of a squirrel-cage induction machine, including air-gap flux saturation harmonics, is presented in this paper. The machine model is based on a flux model, where the winding magnetizing fluxes are directly calculated from the resultant air-gap magnetomotive force, avoiding the use of complicated inductance harmonics. The effects of the fundamental and third harmonic components of the air-gap flux are incorporated in the model by two saturation factors. Moreover, the saturation effects are incorporated in the machine's torque equation, allowing the model to investigate the machine's performance under any load condition. The machine parameters, including saturation data, are obtained via the conventional no-load and locked-rotor tests, with access to the stator neutral connection. The proposed model is validated by experimental results for a squirrel-cage machine and can be used to predict machine transient states.

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