Title :
Electrical machine first order short-time thermal transients model: Measurements and parameters evaluation
Author :
Boglietti, Aldo ; Carpando, Enrico ; Cossale, Marco ; Boriera, Alex Lucco ; Staton, Dave ; Popescu, Mircea
Author_Institution :
Dipt. Energia, Politec. di Torino, Turin, Italy
Abstract :
This paper deals with the measurements and parameters determination of a stator thermal model suitable to predict the winding thermal behavior during short-time thermal transient. A possible application of the proposed first order thermal network is the overcurrent limit prediction in electrical drives. Initially, a detailed description of the thermal model is reported with a deep discussion about its validity limits. Than the test methodology as well as the required measurements for the thermal parameters determination are presented and discussed. Two procedures for the thermal parameters determination are analyzed and compared. Finally, the accuracy of the thermal model and its parameters determination have been validate for five industrial induction motors with a rated power in the range of 4kW-55 kW. Furthermore, the proposed short time thermal test allows the quick determination of the equivalent thermal resistance of the slot insulation system. The proposed thermal model shows an accurate prediction of the winding thermal evolution in thermal transient long up to 4 minutes.
Keywords :
induction motor drives; stators; thermal resistance; electrical drives; electrical machine; equivalent thermal resistance; first order short-time thermal transients model; induction motors; overcurrent limit prediction; slot insulation system; stator thermal model; thermal parameters determination; validity limits; winding thermal behavior; Induction motors; Insulation; Stator windings; Temperature measurement; Thermal analysis; Thermal resistance; Electrical machine thermal model; thermal analysis; thermal transient;
Conference_Titel :
Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE
DOI :
10.1109/IECON.2014.7048555