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Thermal Effect of Short-Circuit Current in Low Power Induction Motors
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| Author(s) |
Leoš Beran |
| Abstract |
Diagnostic of reliability of induction motors (IM) is very important for industry. The article deals with the analyse of short-circuit currents in stator winding of low power induction motors which can strongly affected reliability of IMs. The occurrence of short-circuit arises when some parts of the insulation system of a stator winding breakdown. The stator winding loses a part of active coil and its inductivity decreases. The short-circuit current warms up the surrounding stator winding with its heat effect at point of the short-circuited stator winding. Theoretical part describes two models to simulate different short-circuits that can occur in the stator winding. The first model is a single-phase linear model and the second is a numerical model in SymPowerSystems Toolbox of Matlab software. Chapter III analyses thermal activity on separate parts of the stator winding. Thermal effects were verified on a set up model that consists of a specially designed experimental motor (EM) with the temperature monitoring in slots of the stator. |
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| Filename: | 127.pdf |
| Filesize: | 291.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2008-12-07 by System |
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