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영구자석 전동기 철심의 기계적 응력을 고려한 철손 해석
김지현(Ji-Hyun Kim),하경호(Kyung-Ho Ha),권오열(Oh-Yeoul Kwon),김재관(Jae-Kwan Kim),나민수(Min-Soo La),이선권(Sun-Kwon Lee) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Shrink fitting which is assembling process to fix stator core on the motor frame is widely used at the mass production line of motors because of cost and productivity. This process produces compressive stress on a stator core, which causes negative effect for example, core and copper losses on motor performance. Magnetic properties of electrical steel are effected by both compressive and tensile and thermal stresses. Electromagnetic field analysis is considered one of the effective process since one can predict motor performance including core loss precisely. This method can consider non linear magnetic property with magnetic saturation which is typical electrical steel behavior. However this method is strongly depended on non linear magnetic data, one may have different calculation result whether considering mechanical stress or not. This study describes magnetic field analysis of a motor considering mechanical stress from shrink fitting. Analysis results are compared with each stress-free and stressed condition.