http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Built-in Type 스핀들 구동을 위한 제어방법에 관한 연구
한성용(S.Y.Han),윤주만(J.M.Yoon),박세환(S.H.Park),원충연(C.Y.Won),김영렬(Y.R.Kim),최철(C.Choi),이상훈(S.H.Lee) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.11
In this paper, the authors propose a new high performance Built-in Type spindle motor drive using vector-controlled technique at 15,000 r/min. Control method is changed by variation of motor speed in a conventional Built-in type spindle drive. In the drive system to be presented, the conventional vector control is used in the low-speed range, and the vector control without encoder IS used in the high-speed range. Furthermore, in order to drive the motor from 0 to 15,000 rpm smoothly, the vector control with encoder In the low-speed range (from 0 to 8,000 rpm) is utilized and the vector control without encoder in the high-speed range (from 8,000 to 15,000 rpm) is utilized.<br/> This paper describes problem of control method in conventional spindle drive and proposes control method as variation of motor speed
Fabrication and Application of Ultra-thin Diffraction Device based on Laser Direct Writing
Y. Lee(이영근),D. Yang(양동욱),H. G. Han(한효근),S. H. Kim(김승환),H. K. Nam(남한구),Y.-R. Kim(김영렬),T.-S. D. Le(레딘츤손),H. Yoon(윤효상),S.-W. Kim(김승우),Y.-J. Kim(김영진) Korean Society for Precision Engineering 2023 한국정밀공학회 학술발표대회 논문집 Vol.2023 No.5
단상 AC/DC 승압형 컨버터를 이용한 피복 아크 용접기역률 개선에 관한 연구
유영진(Y. J. Yu),김이훈(L. H. Kim),김준호(J. H. Kim),원충연(C. Y. Won),김영렬(Y. R. Kim),이상용(S. Y. Lee) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
In this paper, we proposed AC/DC boost converter to improve input current harmonic reduction in SMAW(shielded metal-arc welding). The proposed harmonic reduction with the boost converter design and the UC2854 integrated circuit which controls the converter.<br/> The topology of welding power supply is made of a pair of boost converter and welder half-bridge IGBT inverter. The voltage arc is modeled by a variable resistance in series with a voltage source. The results has been confirmed by PSIM simulation tool.<br/> The simulation results show that input ac current is nearly sinusoidal with low harmonic contents and sinusoidal input current waveform at high power factor.