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單相 싸이클로콘버터에 依한 誘導電動機의 速度制御에 관한 硏究
盧采均,金圭哲,李鍾浩 嶺南大學校 工業技術硏究所 1986 연구보고 Vol.14 No.1
This paper describes a study on the induction motor speed control using single-phase to single-phase cycloconverter. The results abtained from this study are as follows. 1) Synchronize type cycloconverter could eliminate asymmetry of voltage and ripple of torque. 2) A satisfactory result was obtained at 10, 12, 15, 20 and 30Hz when flux constant was controlled. 3) A more study is expected on decrease of maximum torque when voltage constant frequency variable method.
盧采均 嶺南大學校 工業技術硏究所 1990 연구보고 Vol.18 No.1
An analytical method to solve non-linear differential equation, describing the performance of an three phase an induction motor following supply disconnection, is described. Current, speed and stator voltage of a three phase induction motor, following supply disconnection are obtained by the proposed method. The proposed method reduces the computational requirement.
노채균,김동희,남승식,김성철 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2
As electionic application system such as data processing communication system and control measurement system get larger, high accuracy, high efficiency, small size and light weight for DC power supply are required. This paper processes a type of circuit that can be controlled by PWM and PFM-TRC method using Thyristor as switching element. And some data essential to system design are obtained by evaluating characteristic of the proposed circuit in terms of chopper frequency, energy storage period and load resistor using normalized parameter. The characteristic analysis of the proposed circuit is illustrated by experiment.
자기 소호형 소자를 사용한 D급 고주파 인버터의 특성 평가 및 설계에 관한 연구
노채균,김동희,김종해,배영호 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2
This paper investigates and compares operating characteristics of the main power conversion circuit and extension of safety operating zone etc in case of use switching device of voltage-fed type high frequency Inverter with self-turn-off device to a case of using nature-commutated type devices. In addition, this paper induced operating characteristics of the main power conversion circuit by examination to normalized parameter. This paper propose that a base data of the main power conversion circuit of characteristics evaluation for frequency characteristics, output characteristics and load characteristics etc.
盧采均 嶺南大學校 工業技術硏究所 1975 연구보고 Vol.3 No.1
A new set of topological formulas is presented, which is valid for networks which may contain all the four types of dependent generators. The application of the formulas requires the listing of tree pairs and evalution of their signs. In contrast with some prior work, The graphs of ideal components, such as ideal transformers and operational amplifiers, are obtained without complicated derivations. Futhermore, in the presence of these components, no special rules are required, nor are redundant terms generated during the analysis.
TMS320C6711을 이용한 Digital X-ray 신호처리 시스템 개발
정민수,이재균,강문호,이채욱 대구대학교 정보통신연구소 2004 情報通信硏究 Vol.3 No.1
기존의 의료용 X선 영상장치에 있어서 TV 방식은 형광증배관에 나타나는 잡음과 TV자체의 잡음으로 인하여 비교적 잡음이 많이 발생한다. 그리고 interlace 주사로 인한 화면 떨림 현상이 발생하여 카메라 해상도가 저하되어 모니터에 나타나는 전체적인 화면의 화질이 그다지 선명하지 않다. 본 논문에서는 NTSC 방식의 잡음 문제를 해결하기 위해, X-ray에 의해 투시된 X-ray 형광증배의 아날로그 화면은 A/D converter를 이용하여 디지털 신호를 만든다. 또한 interlace 방식의 화면이 깜박거리는 현상을 제거하기 위해 double scanning 하고 interlace 주사를 noninterlace로 주사하는 방식을 도입한다. 그리고 실시간 처리를 위하여 TMS320C6711을 이용한 Digital X-ray 신호처리 시스템을 개발하고자 한다. The TV injection method of general X-ray image system has a problem because of the fluorescent increased dividend tube and the TV itself. As the screen trembling by interlace injection decreases the camera resolution, the total quality of monitor is not so clear. In this paper, we make the analog signal of X-ray fluorescent increased dividend tube into digital signal by using A/D converter. Also, to remove the twinkles from interlace method, we adapt the double scanning and the noninterlace method. For realtime processing we develop the digital X-ray signal processing system which uses a TMS320C6711.
吳哲洙,盧采均,서보혁,朴世光 경북대학교 산업기술연구소 1990 産業技術硏究誌 Vol.18 No.-
The Taegu City Authority has set up their master plan to adopt a city subway system since middle 1989 and a feasibility study was already submitted by Institute of Traffic Development in March 1990 and a fundamental planning contract was placed to Samwoo Engineering Co., Ltd. In compliance with this proceedure, the autors have surveyed the existing subway systems, bearing in mind to figure out which kind of system could be suitable to city Taegu. Initially, the subway systems, operating in Korea, were analyzed and the conclusion was approached that the existing subway system in Seoul and Pusan is not suitable to adopt to Taegu but a Light Traffic Vehicle system is efficient to adopt to the city.
이동춘,노채균,고성범 嶺南大學校 工業技術硏究所 1996 工業技術硏究所論文集 Vol.24 No.1
In this paper, a novel current control strategy for PWM current source converter is proposed, applying a multivariable state feedback control. In this converter system, a sinusoidal input current, unity power factor, low current ripple are obtained. In addition, fast transient response of dc link current is achieved.
정민수,이재균,박광오,이채욱 대구대학교 정보통신연구소 2004 情報通信硏究 Vol.3 No.2
본 연구에서는 서리 발생에 직접적인 영향을 미치는 여러 가지 기후학적인 요소들을 10년 동안 안동지방을 대상 지역으로 선정하고 분석하여 안동지역 서리 발생의 예보 가보 가능성에 관하여 연구하였다. In this paper we analyzed various meteorologicals in Andong during 10 years, so the objective forecast possibility of frost in Andong are examined and analyzed.
Forward형 고전압 Pulse 발생용 전원장치에 관한 연구
김경식,김동희,노채균 영남대학교 공업기술연구소 2001 工業技術硏究所論文集 Vol.29 No.1
This paper describes the forward type pulse power supply using a Power-MOSFET in the view of commercialization. The maximum value of output pulse voltage of the proposed pulse power supply system can be realized by thyristor bridge rectifier circuit and also its pulse period is determined by gate signal duty ratio of Power-MOSFET. The principle of basic operating and operating characteristics of forward type pulse power supply is presented. It is shown that theoretical and experimental results are in good agreement by comparing simulation and experimental results when a lamp type ozonizer can be used as a load. Also, experimental results indicate that the discharge and ozone concentration characteristics of the manufactured pulse power supply is more improved compare to the conventional pulse power supply. This proposed supply show that it can be practically used as a pulse power supply in various environment improvement facilities.