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자기진단형 위상제어에 의한 단상유도전동기의 특성 및 모니터링 시스템에 관한 연구
조금배,박수강,백형래,임양수,이성길 조선대학교 에너지.자원신기술연구소 2003 에너지·자원신기술연구소 논문지 Vol.25 No.2
The three-phase induction motor is rugged, reliable, long-lived, self-starting, smooth-running. But it is relatively inexpensive and three-phase power in not available everywhere, so if possible we need single-phase motor with the same characteristics. In fact, single-phase induction motors have excellent characteristics and outnumber the three-phase variety. Most of the small electric motors used in home, farm, or office are single-phase induction motors of one type or another. This electric motors application field need most energy saving type drive according to enlargement of electronic goods and to tend high class. The paper is proposed a various phase control methods for energy saving of single- phase induction motor. The controllers that are embodied by each method can use by various usage according to each performance and it is considered that application may help in the electrical energy saving because is possible to other electrical appliances.
오금곤,조금배,박병강 조선대학교 동력자원연구소 1993 動力資源硏究所誌 Vol.15 No.1
PLC system is used for the purpose of decentralized control and allows data transmission between programable controllers to be easily performed by using an exclusive relay area. The programming language is important to operate the system. In this paper, it is used SFC(Sequence Function Cahrt) programming language to decrease the execution time with compare the ladder diagram program method. As a result, the SFC programming language process time is faster about 20∼30(%) than the ladder diagram programming.
전압공진 DC Link형 3상 PWM 컨버터의 제어특성
오금곤,조금배 조선대학교 동력자원연구소 1995 動力資源硏究所誌 Vol.17 No.1
This paper considers basic operation of voltage resonance performance involved voltage resonant DC lind and describes circuit operation that is proposed converter circuit of three-phase rectification and evaluates characteristics of this system. Particularly, optimal switching pattern applying vector theory of instantaneous state space voltage is adapted as control of input current of three-phase rectification converter. Simulation of voltage resonance DC link three phase converter is analyzed and excellency of this system is presented through experimentation applied digital signal processor.
원칩마이크로컨트롤러를 이용한 전력감시장치의 원격감시 알고리즘 설계
신사현,조금배,백형래 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.2
This paper describes on the development of power detection system with one-chip microcontroller. The power system is designed to main controller system and analyzing software. The system detected 3-phases voltage, 3-phases current, external temperature, leakage current and store in flash memory. AT89C52 was used as CPU and AM29F040B was used as memory to store the data. The analysis software was developed to detect the cause of the electrical fire incidents. With a data-compression technology, the data can be stored for the 43.5 days in a nominal state, four hours and fifteen minute in a state of emergency.
최창주,조금배,김남오,장성남 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2
Ultrafine NiO/YSZ composite powders were prepared by using a GNP(glycinenitrate process) for anode material of solid oxide fuel cells. The specific surface areas of synthesized NiO/YSZ composite powders were examined with controlling pH of a precursor solution and the content of glycine. The binding of glycine with metal ions occurring in the precursor solution was analyzed by using FTIR. The characteristics of synthesized composite powders were examined with X-ray diffractometer, a BET method with N_(2) absorption, scanning and transmission electron microscopies. Strongly acid precursor solution increased the specific surface area of the synthesized composite powders. This is suggested to be caused by the increased binding of metal ions and glycine under a strong acid solution of pH=0.5 that lets glycine consist of mainly the amine group of NH_(3)^(+) After sintering and reducing treatment of NiO/YSZ composite powders synthesized by GNP, the Ni/YSZ pellet showed ideal microstructure very fine Ni particles of 3~5㎛ were distributed uniformly and fine pores around Ni metal particles were formed, thus, leading to an increase of the triple phase boundary among gas, Ni and YSZ.
최연옥,조금배 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2
A single-phase PWM current source rectifier with a neutral leg is presented and throughly analyzed in this paper. This novel topology is implemented by adding an extra leg a step-down single phase PWM space vector modulation method to reduce the dc output voltage harmonics. The PWM pattern generation need a digital system. As compared with a conventional single-phase PWM rectifier, over 20% improvement of the total harmonics distortion in the output voltage can be obtained. Different SVM techniques are analyzed for this PWM rectifier and simulation results are presented.
백형래,조금배,유권종 조선대학교 동력자원연구소 1993 動力資源硏究所誌 Vol.15 No.2
In the photovoltaic power system the maximum power control is necessary because output power of solar cell array is varied by solar insolation and temperature. The high frequency operation is essential for the development of the controller. However the e-i characteristics of Solar Cell Array have hysteresis in high frequency operation. It makes controller which is operated by conventional control method uncontrollable. Therefore, it is indispensable to develop a new control method to obtain maximum available power from solar cell array. The simulation result shows the effectiveness of controller using two-state value control method.
정삼용,조금배 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2
In this paper, author describe the simulation results concerning the period doubling bifurcation route to chaos of DC/DC boost converter under current mode control to show that it is common phenomena on switching regulator when parameters are improperly chosen or continuously varied beyond the ensured region by system designer. The Bifurcation diagrams of periodic orbits of inductor current and capacitor voltage of DC/DC boost converter are plotted with sampled data at moment of each clock pulse causing switching on. DC/DC boost converter studied on this paper is modelled by its state space equations as per switching condition under continuous conduction mode. Current reference signal and capacitance are chosen as the bifurcation parameters and those are varied in step for iterative calculation to find the bifurcation points of periodic orbits of state variables.
최창주,조금배 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.1
The automation system of distribution needed to seperate with quick response for the reliability coefficient in electric power transmission which interruption of service and breakdown This paper obtained the plan of the operation on power distribution system by automated distribution systems, and then transmission line and component of distribution automation system are analyzed for the remote supervisor control function. system configuration and its technological fesibility to distribution automation system. And it will be based for improvement of grid connecting distribution automation system.