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The New Method for Estimation of Stator Winding Temperature and Thermal Protection of Low Voltage Induction Motor
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| Author(s) |
Raca D., Matic P.*, Vasic V. |
| Abstract |
Novel concept of thermal protection relaying based on measurement of current and voltage of an induction machine is introduced and tested in this paper. This method is inexpensive and best suited for a low voltage induction motor in unregulated and regulated drives. It's advantages over actual methods are briefly described in the paper. Proposed method is based on a fact that conductor resistance increases linearly with temperature. It is easy to determine temperature from estimated stator winding resistance of a low voltage induction motor due to a low influence of a skin effect. Obviously this method does not rely on a thermal model of a motor. In this way uncertainties considering thermal model parameters ignorance are eliminated. Even more important advantage of this method over actual methods is that in this way the real average temperature of a stator windings is obtained no meter what caused temperature change. Simulations and experiments presented in this paper are conducted to investigate reliability of a method for wide range of regimes, parameter ignorance and different estimator setups. |
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| Filename: | EPE-PEMC2000 - 345 - Raca.pdf |
| Filesize: | 249.7 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-04-28 by System |
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