The analysis on magnetic flux by the rotor slot of Squirrel-cage induction motor

농형유도전동기(籠型誘導電動機)의 회전자(回轉子) 슬롯 형상(形狀)에 따른 자속밀도(磁束密度) 해석(解析)

The torque characteristic of an induction motor is affected greatly by the slot shape at which the conductors of the rotor are located. In this paper, the three analysis model; general type, deep slot type, double squirrel-cage type, of which the slot shapes are different, were analyzed by FEM at no load, at rated load, and at standstill respectively. The flux distribution and air-gap flux density were also obtained. From the above result, it was confirmed that the analysis models of deep slot and double squirrel-cage had more desirable characteristics than those of general squirrel-cage.