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윤인식(I.S Yoon),김영범(Y.B Kim),장훈(H Jang),황지혁(J.H Hwang),강영미(Y.M Kang) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
AOV is fluid capacity and fluid pressure control in nuclear power plant with heating power plant. The control valve in order channel to control a high differential pressure developed in the form which is complicated and precise control form. From the research which sees in order description below analyzed the performance comparison which follows in trim forms of the control valve with CFD. The Result, multi-stage trim are a fluid kinetic energy small will prevent damages of AOV.
MRAS를 이용한 유도전동기의 파라미터 온라인 추정에 관한 연구
윤인식(In-Sic Yoon),변성훈(Sung-Hoon Byun),김경서(Kyung-Seo Kim) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
This paper presents a method for on-line estimation of rotor time constant of induction motor The proposed method applies a model reference adaptive system(MRAS) using rotor flux vector. The MRAS consists of two independent observers to estimate the rotor flux vector; one based on voltage equations of rotor flux vector, the other based on current equations of them The MRAS utilizes concept of auxiliary variables to norma1ize observer output and decrease high-frequency components of Its input. Experimental results verify the validity and usefulness of proposed method
윤인식(In-Sic Yoon),서영민(Young-Min Seo),홍순찬(Soon-Chan Hong),윤덕용(Duck-Yong Yoon),한성수(Sung-Soo Han) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This paper deal with the power factor improvement of DC power regenerating systems, which are composed of two inverters, zig-zag connected output transformers, and an AC filter. The output voltages of the inverter system are not sinusoidal. Regenerated complex power is analyzed on the basis of fundamental components and therefore the reactive power produced by harmonics is not considered. Therefore, it is needed a new control scheme capable of controlling the reactive power nearly to zero for nonsinusoidal case. Computer simulations are carried out to verify the validity of the prososed control scheme.
김명수(Myeong-Soo Kim),윤인식(In-Sic Yoon),박영진(Young-Jeen Park),윤덕용(Duck-Yong Yoon),홍순찬(Soon-Chan Hong) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
This paper deals with the harmonic reduction technique in square-wave Inverters which can regenerate the dc power from dc bus line to ac bus line in substations for traction systems. To reduce the harmonics, two 6-pulse Inverters are used for 12-pulse operation and zigzag-connected output transformers for eliminating the harmonics of 6(2m-l)±1 orders. And an ac filter is furnished at output side. In spite of the square-wave three-phase Inverters, computer simulations show that the This of the output voltage and current are 2.55% and 0.554%, respectively
장훈(H Jang),윤인식(I.S. Yoon),김영범(Y.B. Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
At the inlet and outlet differential pressure and The fluid velocity over 32㎧ are damaged (Plug, sheet ring, trim) About reduction trim parts of the control valve. AOV of the differential pressure 1,500psi become often the damage in the nuclear power plant. Damages of AOV studied CFD analysis and improvement program. Multi-stage trim designs which decrease a fluid kinetic energy are demanded and AOV parts are demanded case hardening and material change.
양천석(Chun-Suk Yang),윤인식(In-Sik Yoon),김경서(Kyung-Seo Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper describes the design, construction and implementation of matrix converter based on space vector modulation technique. The matrix converter provides sinusoidal input and output wave forms, bidirectional power flow, controllable input power factor and a compact design, compared to the VSI with diode rectification stage at the input. The implemented prototype of matrix converter is built using the exclusive IGBT module and has an input filter, overvoltage protection circuit and commutation means for overcoming practical issues. The good results tested using an induction motor are also presented.