Transient Analysis of Inverter-fed Three Phase Squirrel Cage induction Motor Using A Combined Method of Finite Element Method and Equivalent Circuit

유한요소법과 등가회로법의 결합을 이용한 인버터 구동 3상 농형 유도전동기의 과도 특성 해석

In this paper, a method for an accurate and fast transient analysis, which employs a single slot model for the rotor, is presented. The equivalent circuit parameters are extracted from a combined method of F. E. M and equivalent circuit on 1 slot rotor boundary condition. Two kinds of circuit parameters for each slip are applied to equivalent circuit controlled by variable-voltage variable- frequency. One is the constant parameters at rated speed, and the other is the parameters varying in accordance with slip-frequency. The computer characteristics of the suggested method for four-pole 1.5KW induction motor are compared with those of Equivalent circuit for the transient analysis.