Wykorzystanie modeli cieplnych silników indukcyjnych do estymacji prędkości obrotowej

The paper presents make us method of thermal equivalent diagrams to compensation of changes of the electromagnetic parameters of squirrel cage of induction motors. Rotor speed was estimation for the estimator. In article discussed changes of rotor speed two induction motors on power 3 and 18.5 [kW]. A method for obtaining the change of induction motor speed caused by increase of windings temperature in load and overload state is presented, bared on stator and rotor windings resistance thermal increase. The differences between identification rotor speed, are presented comparison of the induction motor windings average temperature obtained from laboratory measurements, and from computer simulation in transient state was preformed.