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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.
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.
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.
흰쥐 발생과정에서 새로운 Clathrin Assembly Protein 유전자의 발현에 관한 연구
정혜선,조경혜,김형래,김현 서울여자대학교 자연과학연구소 1997 자연과학연구논문집 Vol.9 No.-
Clathrin has been known to be involved in the formation of vesicle coat in trans Golgi network (TGN) and plasma membrane. AP 180, a clathrin assembly protein, has been reported to have an important role in promoting the polymerization of clathrin into a clathrin coated vesicle in neurons. We had a novel clathrin assembly protein (NCAP) gene that had a high degree of homology (95% amino acid sequence similarity, 86% identity) with AP 180 protein when translated into amino acids. To study the expression pattern of NCAP mRNA during the period of synaptogenesis, in situ hybridization histochemistry was carried out. Like AP 180, NCAP mRNA was highly expressed in the brain between the 1st week and third week after birth which represents the period of synaptogenesis in rat nervous system. However the results also showed that NCAP mRNA was expressed in other tissues. In the lung, the high level of expression was shown from the late embryonic stage till adult. The expression in the kidney was shifted from cortical areas to medulla through the development. And the strong expression in the liver was found at embryonic stage but specific expression was not observed after birth. From these results, NCAP is suggested to be a new clathrin assembly protein that promotes polymerization of clathrin into a clathrin coated vesicle in various tissues.
박정민,조금배,백형래,최창주 조선대학교 에너지.자원신기술연구소 2004 에너지·자원신기술연구소 논문지 Vol.26 No.1
Consider the optimal design for PV system, it is apply to 3㎾ interconnected electric power PV system, that is a point of reference for 3㎾ PV the spread residential section system. Through the driving various practical system, we look into that fbr efficiency of generation and stability of interconnected system. Using obtained data acquisition, It can be suggest that installation and management for system parameter to optimal design maximum generation electric power. PV system have some losses that are variation radiation, shadow, change temperature, unbalanced grid connection, serial circuit loss, MPP deference loss, PCS loss and so forth. Using obtained various performance characteristic result, we can make database in the future, through the this study, we can get the reliance and have regard to spread PV system.
최창주,서강성,박수강,조금배,백형래,임병옥 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2
Single phase induction motor(SPIM) is one of the most widely used type of low power AC motors in the world, especially for domestic or commercial applications where a three phase power supply is not available. Fractional horse power single phase induction motors have no starting torque their own. So there are several ways of starting single phase induction motors. The most common type is the starting capacitor installed in series with the auxiliary winding to increase the starting torque. Also, the auxiliary winding is disconnected once the speed of the motor reaches 70 to 80% of the rated speed. In the conventional systems, this function is conducted by a centrifugal switch. But the mechanical centrifugal switch has many problems such as switch malfunction. This paper presents the new methods of universal starting switch by digital controller to overcome these shortcomings of centrifugal switch.
벡터드라이버를 이용한 편측형 선형유도전동기 구동특성에 관한 연구
장용해,임홍우,신사현,조금배,백형래 조선대학교 에너지.자원신기술연구소 2001 에너지·자원신기술연구소 논문지 Vol.23 No.2
The input voltage of Single-sided linear induction motors (SLIMs) is involved with the time harmonics because most LIM is driven by inverter. Therefore the equivalent circuit for an inverter-fed SLIM has t o be modifided to represent every harmonic present in supply voltage. This paper describes that the dynamic characteristic can be used effectively for analyzing the characteristics of a single-sided linear induction motor using vector driver for PI controller.
LC 공진형 PWM 인버터를 이용한 X선 발생장치의 특성에 관한 연구
이성길,박수강,임홍우,조금배,백형래,임양수 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.1
The conventional types of X-ray generators were bulky in physical size and heavy in weight, and the control accuracies of the output voltages were not always satisfactory. The high frequency switching inverter and converter technology on power conversion and control systems have been greatly closed up introducing power semiconductor devices. In this paper, the newly developed converter to take the balance of the output voltage versus the ground are also presented in detail to decreasing the volume and the weight of high voltage transformer and to stabilize ripple. This converter consists of the two independent L-C series resonant circuits using the two capacitances and the two primary windings of high voltage transformer.
신사현,장용해,백형래,조금배 조선대학교 전자정보통신연구소 2001 電子情報通信硏究所論文誌 Vol.4 No.2
In this paper, describe the magnetic sensor detecting the speed of wire or thin pipe, which move irregularly, using Hysteresis phenomenon. After magnetic field is placed to a metallic object, this magnetic sensor converts residual magnetism into velocity, This magnetic sensor is composed of transmission part that causes magnetism, reception part that detects magnetism, and control part that convert magnetic field intensity into velocity.
50kW급 계통연계형 태양광발전시스템의 시뮬레이터 구현
정병호,박정민,조금배,백형래,정수복,Jeong, Byeong-Ho,Park, Jeong-Min,Cho, Geum-Bae,Baek, Hyung-Lae,Chung, Soo-Bok 한국태양에너지학회 2005 한국태양에너지학회 논문집 Vol.25 No.4
This paper summarizes the results of these efforts by offering a photovoltaic system structure in 50kW middle scale applications installed in Cho-sun University dormitory roof. The combination of photovoltaic system components are interconnected and system monitoring system will be summarized for the purpose of the increasing safety in this article. This paper describes configuration of utility interactive photovoltaic system which generated electric power supplies to dormitory. In order to installing the middle or large scale photovoltaic system, It must investigated the optimal design of system, compute quantity of power generation, economic rate of return and so on. In this paper represent 50kW utility photovoltaic system examination and developed simulation results. The performance of photovoltaic system has been evaluated and analyzed with simulation. The results obtained in this research will be much useful to prior investigation for installing utility interactive photovoltaic system.