Steady and transient states thermal analysis of induction machine at blocked rotor operation

✍ Scribed by O. I. Okoro

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 271 KB
• Volume: 16
• Category: Article
• ISSN: 1430-144X
• DOI: 10.1002/etep.67

✦ Synopsis

The main limiting factor, among others, on how long an electrical machine can be operated continuously on load remains the temperature of the various circuit elements (electrical and magnetic) that constitute the machine. On the other hand, the maximum permissible temperature of the machine parts becomes imperative at blocked rotor operation and forms the key element for motor protection and condition monitoring. In this paper, a thermal network model is developed and used to predict the temperatures of the machine parts of a 7.5 kW induction machine at blocked rotor operation. The analysis of the proposed thermal network and the experimental results are presented and discussed. Comparison between the predicted steady state and transient state temperature rises of the test machine parts compare favourably with the experimental results at blocked rotor condition.