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박세환(S.H. Park),윤주만(J.M. Yoon),유재성(J.S. Yu),신수철(S.C. Shin),원충연(C.Y. Won),최철(C. Choi),이상훈(S.H. Lee) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper presents a strategy to drive built in-type spindle induction motor which is used as CNC (Computer Numerical Control) in the industrial world. The direct vector control which is robust to the changed machine parameters in the high speed range is used in this motor control method. And electrical model of induction motor presents the basic idea based on observer structure, which is composed of voltage model and current model. But the former has the defects in low speed range, the latter has the defects of sensitivity to motor parameter. Thus Gopinath model flux estimator which is the closed loop flux observer based on two models for the rotor flux estimation is used in this paper. Moreover this paper presents to drive the spindle motor in the high speed range by using the flux weakening control.
박세환(S.H. Park),윤주만(J.M. Yoon),유재성(J.S. You),신수철(S.C. Shin),원충연(C.Y. Won),최철(C. Choi),이상훈(S.H. Lee) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.5월
A new control method of spindle induction motor drive is proposed in this paper. In a conventional control method, the vector control was employed in the low speed range, while the constant V/f(volt-per-hertz) PWM control was employed in the high speed range. The two control modes were automatically selected at an intermediate speed. In a proposed control method, the direct vector-control with an encoder is employed in the low speed range(from 0 to 8,000rpm), and the vector control without an encoder is employed in th high speed(from 8,000 to 15,000rpm) by using flux observer and speed estimator. This paper describes problem of control method in a conventional spindle induction motor drive and proposes contort method as variation of motor speed.