Hi colleagues,
What is the effect of increasing temperature in induction motor coil on the output current? Is a math formula can describe this relation?
thanks.
When current flowing in coil depending on coil resistance the power loss(W) could tried, to increased the temperature and the blown air on stater be cooling fan, would tried to reduce temperature and temperature would attained steady value when heat generated and decepated are balanced. Heat generated could be given as power loss(copper loss) in winding W=(I)(I)R, where I the current and R the winding resistance. As induction motor efficiney and perameters could be obtained, by performing O.C and S.C test like transformers, hence load optimization could be done on the basis of Hotspot temperature measurement, based on remaining life, could refer my papers......
It depends on the used control method. in V/F control, increasing the coil temperature will have no effect on control performance, but the rated motor power/current will be reduced. On the other hand, if the motor is controlled by vector control, the control algorithm will be affected as the orientation will be deviated. The calculated motor torque will be wrong and as a consequence, the motor dynamic performance will be slower. Therefore, most of industrial type drives are equipped with an algorithm to tune the motor resistance parameter by a direct motor winding temperature measurement using a PTC temperature sensor.
- Badges
- Science topic
- Similar topics
- Engineering
- Control Theory
- Control Systems
- Control Systems Engineering