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Sabaghi, Masoud
- Monitoring of Induction Motor Temperature under Unbalanced Supplying by Stator Resistance Estimation
Abstract Views :396 |
PDF Views:223
Authors
Affiliations
1 Department of Electrical Engineering, Ashtian Branch, Islamic Azad University, Ashtian, IR
1 Department of Electrical Engineering, Ashtian Branch, Islamic Azad University, Ashtian, IR
Source
Indian Journal of Science and Technology, Vol 5, No 3 (2012), Pagination: 2354-2359Abstract
Motor parameters estimations are needed for many applications. One of these parameters is stator winding resistance. Induction motor temperature can be monitored by this parameter estimation under balanced and unbalanced condition. For this purpose, a DC signal is injected to AC voltage. In this study, stator temperature is obtained from two methods. One of them is measuring by construction of a temperature measurement system using sensor-installing method and the other method is measuring temperature by Stator Winding Estimating (SWE). Each method is implemented on a 1.1kW / 50Hz / 1400rpm three-phase squirrel cage induction motor. After that, different experimental tests have been done on the motor under balanced and unbalanced conditions and they have been evaluated. The capability of measuring temperature from SWE method is investigated and responding of this method to motor thermal characteristics variations and reliable thermal protection are evaluated.Keywords
Sensor Installing, DC Injection, Temperature Monitoring, Induction Motor and Stator WindingFull Text
References
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- Analysis of Current Harmonic on Power System Fuses Using ANSYS
Abstract Views :472 |
PDF Views:141
Authors
Affiliations
1 Department of Electrical Engineering, Ashtian Branch, Islamic Azad University, Ashtian, IR
1 Department of Electrical Engineering, Ashtian Branch, Islamic Azad University, Ashtian, IR
Source
Indian Journal of Science and Technology, Vol 5, No 3 (2012), Pagination: 2396-2400Abstract
One of the most important protective devices in power systems are fuses which have been used for ages. Passing short circuit current from fuse causes to warm fuse element that it will open this path. Fuse temperature can directly affect fuse operation and its melting as well. Therefore, fuse should be designed in a way that it does not operate at nominal current and instantaneous over currents whereas it should operate at error case. In this paper, firstly, fuse element is investigated and its behavior is studied. Then, a sample fuse with its different sections is simulated under sinusoidal and non- sinusoidal currents. After that, different parameters such as thermal distribution, thermal flux, and electrical potential in all fuse parts are obtained for sinusoidal and non-sinusoidal currents. Also, Fuse temperature for various THD values is determined. Finally, an equation to determine fuse nominal current due to harmonics is presented.Keywords
Thermal Flux, Current Harmonics, Power System Fuses, Finite Element Analysis, ANSYSFull Text
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