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蔡永茂,梁괘儁 忠州大學校 1987 한국교통대학교 논문집 Vol.21 No.-
This paper deals with the simplification of system in a time domain. the error signals between the original and the simplified model is synthesised is synthesised and the latter is estimated by the Walsh function. It tries to minimize the errors between the time responses of the two systems. This method is by compared with the existing method means of a numerical example. The time response of this simplified model approximates closely to that of the original model. The proposed method is simpler in analysis and easier in implementation than the existing methods. Though the walsh function can be easily generated with the discrete values, it has errors because its zero crossings are not continuous. This method aims at the reduction of the errors in the two systems by deviding into the more sub-intervals, and selecting the reduced-order model according to the response of the model. As a result, it can be applied for the simplification of higher order functions into lower order functions and for the design control systems.
Magnetic Contactor를 이용한 돌입전류 경감에 관한 연구
채영무 충주대학교 2006 한국교통대학교 논문집 Vol.41 No.-
As society is highly industrialized by grown-up civilization and improved quality of life, the demand of electric power is being increased day by day. And then, the equipment of electric power supply is expanded and it cannot be helped increasing the Capacitor bank for the Voltage compensation of system. So, it is needed the selection of proper capacitor to deal with rising plant load and especially, required to develop 'Capacitor switching magnetic contactor' to protect damage of capacitor. This thesis provide the guide line of technical approach to MC selection through development proper CS MC - in being adopted 'power factor compensation MC under 'the low voltage electric power compensation unit' - by EMTDC Calculation of inrush current's character, when End-user want to extend the capacitor.