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- 저자 : 成耆洌 (검색결과 2 건)
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金興根,成耆冽,崔協右 慶北大學校 1990 論文集 Vol.49 No.-
This paper describes maximum torque drive of a vector controlled induction motor. As the instantaneous value of the stator current must be controlled to accomplish the superior vector control characteristic, the current controlled PWM transistor inverter with hysteresis controller is adopted. At steady-state, since the developed motor torque is proportional to the product of the flux and torque component, the motor output torque becomes maximum if the two components are equal. The system block diagram is suggested for maximum torque control. The superior characteristic of the proposed system is verified with digital computer simulation.
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電流 制御形 PWM 초퍼에 의한 磁器 浮上用 電子石 驅動에 관한 硏究
徐輔爀,全舜鏞,成耆洌 慶北大學校 1991 論文集 Vol.51 No.-
This paper designs a chopper system to drive a magnet of a magnetic levitation system. The chopper system consists of bridge type chopper with two switching devices and two freewheeling diodes. For the given system, harmonic component of source current is analyzed according to its freewheeling type. Also, its operating charateristic is analyzed by simulating the load current waveform according to the type of current controller. From the results of simulation and harmonic analysis, in terms of current controllability, current ripple and switching frequency, load freewheeling type chopper system wish ramp comparison controller is proven to be suitable. Thus the load freewheeling type chopper system with ramp comparison controller is designed and the feasibility of the proposed system is examined through experiment.
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