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종축 자속형 영구자석 동기 발전기의 전자기적 구조 변경에 따른 출력특성 비교
정태욱(Tae-Uk Jung),배병덕(Byung-Duk Bae),김회천(Hoe-Cheon Kim) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.6
Generally, the structure without the stator core Axial Field Permanent Magnet (AFPM) generator was simple and there was nearly no cogging toque. And because it had the wide driving rate area, it had been being mainly used in the small wind power generation system. However, AFPM generator with non-slotted stator can’t generate high voltage at low wind speed due to long air-gap. It is the reason of output efficiency drop. Therefore, in this paper, the AFPM synchronous generator with internal rotor and dual slotted stators for the small wind turbine is studied, and deal with a cogging torque minimization through the determination of optimum pole-arc ratio.
정태욱(Jung, Tae Uk) 동아시아일본학회 2013 일본문화연구 Vol.48 No.-
The aim of this paper is the comparative study between Yokoku ?『Naniwa』and ?『Hakurakuten』? which was written in medieval ages, with the view of the advent and the aggression. These two works are written about foreigners who wanted to come to Japan for the purpose of spreading their culture. And more over the writers of these two books are assumed as one man whose name is Zeami. Even though the writer of Yokoku ?『Naniwa』? and ?『Hakurakuten』? are regarded as one man Zeami, but these two books have difference. The leading characters of these two books, Wani and Hakurakuten, were described as conflicting positions. Wani, the leading character of ?『Naniwa』? showed the shape of teacher and the communicator of chinese culture and books to Japanese. So he was described as the trader who had the perspective. But Hakurakuten, the leading character of ?『Hakurakuten』? showed the shape of the imperialist of high culture. Thus he was described as a failed trader who had only cultural unification. But inspite of antipathy against Japanese, Hakurakuten was the scale of cultural difference, and furthemore he became the step stone of cultural ripening. Finally 『Hakurakuten』 showed a way of cultural trad with invasion and rejection.
이중 고정자 구조의 소형풍력터빈용 AFPM 발전기의 코깅토크 저감에 관한 연구
정태욱(Tae-Uk Jung),배병덕(Byung-Duk Bae) 한국조명·전기설비학회 2012 조명·전기설비학회논문지 Vol.26 No.2
The cogging torque is important to the cut-in wind speed. And, it causes the acoustic noise and the vibration on the machine. This paper presents a 3D FEA(Finite Element Analysis) to evaluate the effect of magnet skew and stator displacement on cogging torque reduction, for double core AFPM(Axial Flux Permanent Magnet) generator. As a result, the magnet skew and the stator side displacement are proved excellent techniques to reduce the cogging torque.
신재생에너지용 연계형 인버터의 고효율 승압에 관한 연구
정태욱(Tae-Uk Jung),김주용(Ju-Yong Kim),최세권(Se-Kwon Choi),조준석(Jun-Seok Cho),고희석(Hee-Seok Kho) 한국조명·전기설비학회 2009 한국조명·전기설비학회 학술대회논문집 Vol.2009 No.5월
In this paper, such as battery power or solar energy and fuel cells generated from Renewable energy sources, high voltage to low voltage DC-DC Converter for converting the design of the study. System consists of low voltage (24~28 [VDC]) and Boosts the voltage (270 [VDC]) for a 3 [㎾] DC-DC converter and control circuit is configured as, Power switch the ST Tomson's Automotive low voltage high current MOSFET switches STE250NS10S (temperature 250A) was applied to the two parallel. Also, Controller's processor used ATMEGA128, and Gate Drive applies and composed Photo Coupler TLP250. development. Input voltage (24V) and output voltage (270V) for Conversion in the H-bridge converter topology of the circuit output side power and voltage to control the implementation of the Phase shift angle control applied. And, 3㎾ of power to pass appropriate specification of the secondary side as interpreted by the high frequency transformer, and the experimental production and analysis of the experiment.
직립 기동형 동기 릴럭턴스 전동기의 기동 안정성 개선을 위한 도체바 설계
鄭泰旭(Tae-Uk Jung),南赫(Hyuk Nam),洪正杓(Jung-Pyo Hong) 대한전기학회 2006 전기학회논문지 B Vol.55 No.3
This paper deals with the conductor bar design to improve starting stability of line start synchronous reluctance motor(LSSynRM). As design variables, the number and the shape of conductor bars of rotor are chosen. The starting characteristics are calculated by finite element method(FEM) and the conductor bars are designed to improve the starting torque according to the initial starting rotor position. Finally, the starting characteristic of the designed model are compared with that of the initial model.
쉐이딩 코일의 추가에 의한 솔레노이드 밸브의 소음 특성 개선
鄭泰旭(Tae-Uk Jung) 대한전기학회 2008 전기학회논문지 Vol.57 No.7
Recently agriculture has been intelligenced and automatized because the number of agricultural population is reduced, and the various agricultural machine is developed and utilized actively, In these agricultural automation system, the solenoid valve is widely used for the supply of water and fertilizer to the plant and soil. In this solenoid valve system, AC excitation solenoid valve is widely used because of economic merit and simple system scheme. However, the instantaneous chattering vibration and noise of plunger caused by the alternative MMF variation is very important performance characteristics. In order to reduce vibration the DC excitation solenoid valve is sometimes applied for the high-end applications. In this case, the control circuit is essential to control DC excitation current. It may causes the cost increase and system complexity and it is not suitable for the outdoor agricultural machine. In this paper, the electromagnetic structural improvement of AC solenoid valve is studied to reduce the dynamic vibration and noise. As an economical solution, the shading coil is additionally implemented to the conventional solenoid valve. As a result of this study, the vibration and acoustic noise is largely reduced by the compensating MMF of shading coil and it is verified by the test of prototype.
오버행과 스큐 구조를 가지는 영구자석 직류전동기의 2차원 유한요소해석 방법 및 최적 설계
정태욱(Tae-Uk Jung),서정랑(Jung-Rang Seo),이강원(Kang-Won Lee) 한국조명·전기설비학회 2018 조명·전기설비학회논문지 Vol.32 No.4
Permanent magnet DC motors are gradually being replaced by other motors due to the durability limitation of driving method through mechanical rectification, but they are still widely used for simple control methods and so on. In order to improve the driving performance of the permanent magnet DC motor, an overhang structure and a skew structure are mainly applied. In order to analyze the performance through a finite element analysis in consideration of the three-dimensional structure, it is inevitable to use the three-dimensional model and it takes a long time compared to the two-dimensional model. In this paper, we propose a method to reflect the overhang structure and the skew structure in the two - dimensional analysis model. In order to verify the validity of the proposed method, we compared the results of the analysis of the proposed model with the 3D model. In order to improve the performance of the permanent magnet DC motor, the design parameters were selected and optimized through the proposed model.
신재생에너지 연계용 고효율 승압형 DC-DC Converter 회로 토폴로지 개발
정태욱(Tae-Uk Jung),김주용(Ju-Yong Kim) 한국조명·전기설비학회 2010 조명·전기설비학회논문지 Vol.24 No.1
본 논문에서는 배터리전원 또는 태양광과 연료전지 등의 신재생 전원에서 발생되는 저전압 에너지원을 고전압으로 변환하기 위한 DC-DC 컨버터의 설계에 대해 연구하였다. 입력 DC24[V] 전압을 출력전압 400[V]로 변환하기 위한 H-브리지 컨버터의 회로 토폴로지에 있어 출력측 전력 및 전압을 제어하기 위해 위상천이제어를 적용하여 구현하였다. 제안된 컨버터 시스템의 장점으로는 전류 스트레스 감소 및 높은 효율성, 신뢰성 및 단순화된 관리뿐만 아니라 저렴한 비용 등을 들 수 있으며, 가정용 전력 생산을 위한 시스템으로 매우 유용하다는 것을 알 수 있었다. This article studies the design of DC-DC Converter to convert low-voltage energy sources generated from renewable power like battery power, photovoltaic power, or fuel cells into high-voltage ones. The circuit topology of H-bridge Converter to convert input voltage, 24[V], into out voltage, 400[V], was realized through applying phase shift angle control so as to manage electric power and voltage in the output side. The advantages of the converter system suggested are the low cost as well as current stress reduction, high efficiency, reliability, and simplified maintenance. It is also found that the system is highly useful to produce residential electric power.
鄭泰旭(Tae-Uk Jung),蔡明基(Myong-Gi Chae),車賢錄(Hyun-Rok Cha),尹喆鎬(Cheol-Ho Yun) 대한전기학회 2007 전기학회논문지 Vol.56 No.4
In general the distributed winding method is applied for induction motor in order to have the sinusoidal flux distribution. Recently the concentrated winding method is the interested technique so as to lower the material cost portion of copper coil. In the concentrated winding induction motor the harmonic flux and the torque deterioration by it would be occurred. To restrain ill effect of harmonic flux distribution by concentrated winding, the skew of rotor conduction bar is very important design variable. This study is focused on the optimal design of rotor bar's skew and winding turns for concentrated winding induction motor. In this study, the control method of harmonic parasitic torque in concentrated winding induction motor is proposed and validated its practicality through the experiment. As a result of this study, large skew angle which was not conventional in distributed winding was favorable in the concentrated winding induction motor. The concentrated winding induction motor which is designed per the proposed method of this study can be manufactured more cost effectively than conventional distributed winding.