A novel method for reduction of stray loss in induction motor

Author

Choudhury, C. ; Deshmukh, N.K.

Author_Institution

Large Motor Div., R&D Center, Crompton Greaves Ltd., Mandideep, India

fYear

2013

fDate

22-23 Feb. 2013

Firstpage

101

Lastpage

105

Abstract

As per IEC-60034-2-1, 2007, for a rotating electrical machine, the stray loss component increases with the decrease in the size of the machine. This causes a drastic reduction in the machine efficiency, especially in small a.c. motors. Using measures for reducing stray loss will greatly help in improving the efficiency of motors. This paper explores a novel method for reducing the stray loss in totally enclosed fan cooled (TEFC) induction motors. The concept of diamagnetic shielding has been used to reduce the stray loss occurring due to leakage of flux from stator´s outer surface. Electromagnetic Analysis based on Finite Element Analysis (FEA) has been used extensively for this study. The effectiveness of the method has been highlighted by analyzing flux plots generated by electromagnetic software, Maxwell.

Keywords

IEC standards; Maxwell equations; finite element analysis; induction motors; AC motors; FEA; IEC-60034-2-1; Maxwell equation; TEFC induction motors; diamagnetic shielding; drastic reduction; electromagnetic analysis; electromagnetic software; finite element analysis; machine efficiency; rotating electrical machine; stray loss component; stray loss reduction; totally enclosed fan cooled induction motors; Graphite; Induction motors; Iron; Loss measurement; Magnetic shielding; Stator cores; Diamagnetic Material; Electromagnetic Analysis; Finite Element Analysis; Magnetic Circuit; Magnetic Sheilding; Stray loss;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Conference at Illinois (PECI), 2013 IEEE

Conference_Location

Champaign, IL

Print_ISBN

978-1-4673-5601-5

Type

conf

DOI

10.1109/PECI.2013.6506042

Filename

6506042