Toplinska analiza asinkronog stroja

The temperature distribution over the cross-section of an induction motor is calculated at the steady state and transient condition. In order to develop smaller and more efficient electric motors, there is a necessity to carry out more thermal analysis in parallel with the traditional electromagnetic design. It has been found that attention to the thermal design can be rewarded by major improvements in the overall performance. The developed thermal model for Total Enclosed Fan Cooled (TEFC) induction motors is implemented into the design program called Motor-CADTM. The model produced has been experimentally verified by measurements on industrial machines. The obtained results confirm that the developed thermal model is capable of a sufficient degree of accuracy in the thermal design of (TEFC) induction motors.Predstavljen je proračun razdiobe temperature po presjeku asinkronog stroja za stacionarno opterećenje kao i za slučaj zakočenog rotora. U cilju smanjenja dimenzija i povećanja korisnosti neophodno je primijeniti detaljniju toplinsku analizu uz elektromagnetski proračun. Nalazi se da je rezultat primjene detaljnije toplinske analize poboljšanje operativnih karakteristika motora. Razvijeni toplinski model za potpuno zatvoreni asinkroni motor s prisilnim hlađenjem zrakom izvana (TEFC) je uključen u računalni program za projektiranje naziva Motor-CADTM. Prikazani model je eksperimentalno potvrđen na industrijskim električnim strojevima. Dobiveni rezultati potvrđuju da razvijeni toplinski model posjeduje dovoljan stupanj točnosti u toplinskom projektiranju (TEFC) asinkronih strojeva