Indian Journal of Science and Technology

Abstract

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 Winding