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최경호(Kyeong-Ho Choi),김경식(Kyeong-Sik Kim),진명철(Myung-Churl Chin) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper presents the design results and characteri- stic analysis of SRM. For vehicle power supply for adaptable design of the SRM, variable design parameters, such as stator and rotor laminations, winding details, pole numbers, and pole arcs, phases numbers are required. So, in this paper the SRM design results and the comparison of characteristics for vehicle power supply as phases changed are described.
고정자 자속벡타를 이용한 브러시리스 전동기의 전류제어 PWM
陳明哲,黃文龜 大田産業大學校 1993 한밭대학교 논문집 Vol.10 No.1
ABSTRACTIn this paper, a new PWM method and estimating means of field oriented stator cur- rent components for BLDC motor drive are presented. The field oriented stator current components is predicted by calculated stator flux from the stator voltage and current signals. The current control PWM using stator flux vector without rotor flux angle in- formation is also suggested. Performance of the proposed controller is observed through a simulation. In this paper, a new PWM method and estimating means of field oriented stator current components for BLDC motor drive are presented. The field oriented stator current components is predicted by calculated stator flux from the stator voltage and current signals. The current control PWM using stator flux vector without rotor flux angle information is also suggested. Performance of the proposed controller is observed through a simulation.
서로 다른 도파구조와 결합된 광 GADC에서의 최적 전력전송
李庸日,陳明哲 慶北專門大學 2003 慶北專門大學 論文集 Vol.22 No.-
To evaluate optimal design conditions on optical power coupling in grating-assisted directional couplers(GADCs) with two guiding channels, a newly developed rigorous modal transmission-line theory(MTLT) is applied. By defining a power distribution ratio(PDR) and coupling efficiency(CE) amenable to the rigorous analytical solutions of MTLT, we explicitly analyze those characteristics of TE modes propagating in GADCs. The numerical results reveal that the incident power is optimally coupled into the desired guiding channel if the powers of rigorous modes excited at the input boundary of grating-assisted coupler are equally partitioned.