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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
Journal Basic Information
Journal DOI :
The Korean Institute of IIIuminating and Electrical Installation Engineers
Editor in Chief :
Volume & Issues
Volume 29, Issue 12 - Dec 2015
Volume 29, Issue 11 - Nov 2015
Volume 29, Issue 10 - Oct 2015
Volume 29, Issue 9 - Sep 2015
Volume 29, Issue 8 - Aug 2015
Volume 29, Issue 7 - Jul 2015
Volume 29, Issue 6 - Jun 2015
Volume 29, Issue 5 - May 2015
Volume 29, Issue 4 - Apr 2015
Volume 29, Issue 3 - Mar 2015
Volume 29, Issue 2 - Feb 2015
Volume 29, Issue 1 - Jan 2015
Selecting the target year
A Optical System Design of LED Marine Lanterns Based on a TIR Collimator Lens
Go, Dong Hyun ; Lee, Yoon Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 1~5
DOI : 10.5207/JIEIE.2015.29.11.001
In this paper, we propose the optical system design for a medium sized LED marine lanterns which simplifies the multi-layer structure into a single structure. In order to satisfy the target fixed intensity(35,000cd) and vertical divergence(
), we use the total internal reflection collimator lens. And a Monte Carlo simulation has been utilized to optimize a condition of a LED package, TIR lens and outside lens. The computer simulation results indicated that this LED marine lanterns can produce of a fixed intensity(35,382cd) and vertical divergence(
). Using the this optical system, we achieve the target value of LED lanterns.
A Study for Color and Illuminance Control Algorithm of Broadcast LED Lighting
Shin, Dong-Seok ; Park, Chul-Hyung ; Park, Chong-Yeun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 6~17
DOI : 10.5207/JIEIE.2015.29.11.006
In this paper, colors of broadcast lightings composed of Red, Green, and Blue LED(Light Emitted Diode) can be linearly and quantitatively controlled in low illuminance. Because LED cannot emit uniform illuminance in low illuminance, the colors of RGB LED are unmixable. Furthermore, the illuminances are nonlinear with the dimming values of the RGB LED due to the nonlinearity of the output illuminance with the current through the LED. This nonlinearity generated errors of the target colors and illuminances. The proposed algorithm set up the target colors, which is expressed by the color coordinates in CIE 1931 color space, and the target illuminances. Then the illuminances of RGB LED were calculated using color mixing theory. The calculated illuminances determined the dimming values of the RGB LED for transmission via DMX512 communication. After the broadcasting lighting received the dimming values of the RGB LED via DMX512 communication,.RGB LED can emit target color and illuminance, and be controlled by calculating the PWM(Pulse Width Modulation) duty ratio of the hybrid LED driver which be considered the nonlinearity for the illuminances of the LED. As a result, the proposed algorithm can linearly and quantitatively control the colors and illuminances in full range of illuminance. Then we verify experimentally that the errors of the emitted color coordination x, y and illuminance are 2.27%, 3.6% and 1.5%, respectively.
The Spinning Right-angle Stereo Vision System to Center the Shifted Object on the 3-Dimensional Image
Seo, Choon-Weon ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 18~27
DOI : 10.5207/JIEIE.2015.29.11.018
In this paper, we proposed the spinning right-angle stereo vision system to center the shifted object on 3-dimensional image using a human eyesight-like, and the system is reconstructed with conventional stereo vision system. In this proposed system, the centering results of objects on the 3-dimensional image are very good, and we got the parameter ratios 89~112% for the real measurement values. Therefore, the suggested the spinning right-angle stereo vision system have a high possibilities to be applied to many industrial system parts and to be used for robot system, automatic system, and etc.
Bidirectional Current Triggering in Two-Terminal Planar Device Based on Highly Resistive Vanadium Dioxide Thin Film Using 966nm Near Infrared Laser
Kim, Jihoon ; Lee, Yong Wook ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 28~34
DOI : 10.5207/JIEIE.2015.29.11.028
By incorporating a 966nm near infrared laser, we demonstrated bidirectional current triggering of between 0 and 10mA in a two-terminal planar device based on a highly resistive vanadium dioxide (
) thin film grown by a pulsed laser deposition method. A two-terminal planar device, which had an electrode separation of
conducting layer, was fabricated through ion beam-assisted milling and photolithographic techniques. A bias voltage range for stable bidirectional current triggering was determined by investigating the current-voltage curves of the
device in a current-controlled mode. Bidirectional current triggering of up to 10mA was realized by directly illuminating the
film with a focused infrared laser beam, and the transient responses of triggered currents were analyzed when the laser was modulated at various pulse widths and repetition rates. A switching contrast between off- and on-state currents was evaluated as ~3571, and the rising and falling times were measured as ~40 and ~20ms, respectively.
High Efficiency Design of Ie4 Class Synrm Subsituting for Induction Motor
Ryu, Gwang-Hyeon ; Lee, Ju ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 35~40
DOI : 10.5207/JIEIE.2015.29.11.035
In accordance with global energy conservation policies such as MEPS (Minimum Energy Performance Standard), electric motor industry is moving to super-high-efficiency machines and research to develop IE4 (International Energy Efficiency Class 4) motors has been launched. In this situation, SynRM (Synchronous Reluctance Motor) has been attracting attention in place of induction motor which hardly provides super premium efficiency. As a result, much research on SynRM is being performed at home and abroad. Also, some products have already been appearing in the market. Compared to induction motor, SynRM has better efficiency per unit area and wider operating range. Although the utilization of control system in synchronous motor results in higher prices, we still need to concentrate on developments of SynRM so as to comply with the new policies. This study demonstrated the electromagnetic design methods of super premium SynRM while maintaining the frame of existing IE3 induction motor. We documented the design procedures for generating high saliency which is the most essential and mechanical stress anlaysis is also treated. In conclusion, we proved the validity of our design by manufacturing and testing our 3 models.
A Study on Characteristics of Insulation Breakdown and Surface Discharge by the Oxygen Concentration in the Dry Air in Quasi-Uniform Field
Beak, Jong-Hyun ; Seok, Jeong-Hoo ; Choi, Byoung-Ju ; Bae, Sungwoo ; Kim, Ki-Chai ; Park, Won-Zoo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 41~46
DOI : 10.5207/JIEIE.2015.29.11.041
This study was conducted to discover a substitute of
gas is widely used across the industries. Thanks to superior electrical properties, in particular, it has been commonly used in electrical industry. However, there have been a lot of studies on its serious effect on global warming. As a substitute of this synthetic gas, a mixture of dry air and
was chosen in this study. In case of
, dielectric strength differs depending on the mixing ratio. This study examined dielectric breakdown and flashover after adjusting oxygen percentage in the dry air. This test was conducted in a quasi-uniform electric field depending on pressure, oxygen concentration and gas mixtures. The test results found that dielectric voltage and flashover voltage were the highest at a certain oxygen concentration. It is the results of this photoionization and electron attachment of oxygen.
Study on Transient Improvement through Governor Control under Asynchronous Transition of CTTS
Kang, Byoung-Wook ; Chai, Hui-Seok ; Han, Woon-Ki ; Lim, Hyun-Sung ; Kwon, Seung-Ok ; Kim, Jae-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 47~52
DOI : 10.5207/JIEIE.2015.29.11.047
This paper derives the problems that occur when asynchronous transfer in case of phase, frequency, voltage between the emergency generator and the grid and proposed the countermeasure to solve this problem when the transfer switch replace ATS(Automatic Transfer Switch) with CTTS(Closed Transition Transfer Switch) for the non-interrupting switching. In order to simulate above cases, modelling was used the transient analysis program PSCAD/EMTDC. By using this, the customer installed emergency generator and the grid was implemented. We compared three cases of asynchronous transition based on the basic case and proposed improvement by controlling the governor of emergency generator.
Development of Heating and Cooling System with New Heat Exchange Cycle for High Efficiency and Peak Power Reduction Using Real time Constant Refrigerant Pressure Control
Choi, Sun-Young ; Lee, Young-Kug ; Choi, Myeong-Gwang ; Choi, Tae-Won ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 53~58
DOI : 10.5207/JIEIE.2015.29.11.053
Systemic heating and cooling air conditioning systems are popular in various industrial fields and even home. Recently, the rate of supply of this kind of multi-heat pump has been increased under ESCO financing supporting system. Generally the heat pumping system has a structural simplicity and easy installation benefits. and has good running efficiency under normal designed condition. But under extreme climate condition (over
), this system exposes abnormal power consumption. It causes high progressive electric power rates and resultant peak power capacity of power plant. In this paper, a novel system concept of buffering refrigerant accumulator and constant pressure control system to relieve peak power load is proposed and this system's utility is verified with an prototype experimental system.
Study on Memristive Characteristics in Electronic Devices Based on Vanadium Dioxide Thin Films Using 966nm Laser Pulses
Kim, Jihoon ; Lee, Yong Wook ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 59~65
DOI : 10.5207/JIEIE.2015.29.11.059
By harnessing the thermal hysteresis behavior of vanadium dioxide(
), we demonstrated multi-resistance states in a two-terminal electronic device based on a
thin film by using a 966nm infrared laser diode as an excitation light source for resistance modulation. Before stimulating the device using 966nm laser pulses, the thermal hysteresis behavior of the device resistance was measured by using a temperature chamber. After that, the
device was thermally biased at
so that its temperature fell into the thermal hysteresis region of the device resistance. Six multi-states of the device resistance could be obtained in the fabricated
device by five successive laser pulses with equal 10ms duration and increasing power. Each resistance states were maintained while the temperature bias was applied. And, the resistance fluctuation level was within 2.2% of the stabilized resistance and decreased down to less than 0.9% of the stabilized resistance 5s after the illumination.
Analysis on Voltage Sag in Low Voltage DC Distribution System according to the Number of Poles
Noh, Chul-Ho ; Kim, Doo-Ung ; Gwon, Gi-Hyeon ; Oh, Yun-Sik ; Han, Jun ; Kim, Chul-Hwan ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 66~73
DOI : 10.5207/JIEIE.2015.29.11.066
AC-based power systems, having the advantages that voltage transformation and long distance transmission are easy, have been constructed since the last 19th century. However, DC-based power system is paid attention these days because of the development of power electronic devices as well as the increase of digital loads and distributed generation. For instance, the transmission systems using High Voltage DC (HVDC) are commercially operated in the world and the researches on distribution system using Low Voltage DC (LVDC) are gradually increased. This paper analyzes voltage sag, resulted from faults, in LVDC distribution system according to the number of poles. Modeling and simulation with various conditions are conducted by using ElectroMagnetic Transients Program (EMTP). Moreover, some countermeasures to reduce voltage sag in LVDC distribution system are suggested briefly.
Characteristics of DC Corona Discharges Caused at the tip of a Needle-shaped Electrode Placed in the Homogeneous Electric Fields
Kim, Tae-Ki ; Kim, Seung-Min ; Lee, Bok-Hee ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 74~81
DOI : 10.5207/JIEIE.2015.29.11.074
In the measurement of atmospheric static electric field, it is important to know characteristics of corona discharges caused at the tip of test electrode. This paper presents the fundamental data of DC corona discharges that occurred at the tip of a needle-shaped electrode placed in the homogeneous background electric field which simulates the atmospheric static field under thundercloud. The major characteristics of interest for this purpose are the polarity effect of corona discharges and the magnitudes and time intervals of corona current pulses. The experimental set-up consists of the plate-to-plate configuration with a needle-shaped protrusion, DC power supply, and voltage and current measuring devices. As a result of experiments, the polarity dependence of corona pulses is significantly pronounced. The time intervals between successive corona pulses in the negative polarity is much longer than those in the positive polarity. The time intervals for both polarities is drastically decreased as the applied electric field is increased. Also the magnitudes of the positive corona pulses are slightly changed with an increase in applied electric field, but those of the negative corona pulses are linearly increased with increasing the applied electric fields.
Extraction Method of Parameter of Self Excited Eddy Current Brake Using L-C Resonance and characteristic research
Jeong, Taechul ; Cho, Sooyoung ; Ahn, Hanwoong ; Jeong, Geochul ; Park, Eung-Seok ; Cho, Hyuntae ; Lee, Ju ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 82~88
DOI : 10.5207/JIEIE.2015.29.11.082
In recent years, numerous studies have attempted to find and explore the auxiliary brake and the oil pressure type and electrical type are mainly used. However, the model proposed here is to self-excited eddy current brake. The advantage of this is it does not require an external power supply and can be produced to reduce the size than others. This self-eddy current brake consists of RLC circuit so resistance, inductance and capacitance value can be considered a fixed value. But, inductance and resistance value changes depending on the shape, temperature and magnetic alteration. Therefore, in this paper, the focal point is characteristic analysis according to the parameter variations. Also, using this result, this paper explains how to estimate the capacitance.
A Study on Detection of High Impedance Fault in Low Voltage DC Distribution System using Filter based on Mathematical Morphology
Oh, Yun-Sik ; Noh, Chul-Ho ; Kim, Doo-Ung ; Gwon, Gi-Hyeon ; Han, Joon ; Kim, Chul-Hwan ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 89~95
DOI : 10.5207/JIEIE.2015.29.11.089
As a solution of improving the energy efficiency in power system, Low Voltage DC (LVDC) distribution systems different from conventional ones have been constantly researched. As in conventional AC distribution system, LVDC distribution system can suffer from High Impedance Fault (HIF) which may cause a failure of protective relay due to relatively low change in magnitude of fault current. In order to solve the problem, a scheme for detecting HIFs is presented in this paper. Closing Opening Difference Operation (CODO) based on Mathematical Morphology (MM), one of the MM-based filters, is utilized to make fault signals discriminable. To verify performance of the scheme, a simple LVDC distribution system is modeled by using ElectroMagnetic Transient Program (EMTP) software. Computer simulations according to various conditions are performed and comparison studies with a scheme using Wavelet Transform (WT) in an aspect of simulation time are also conducted.
A Virtual Environment for Optimal use of Video Analytic of IP Cameras and Feasibility Study
Ryu, Hong-Nam ; Kim, Jong-Hun ; Yoo, Gyeong-Mo ; Hong, Ju-Yeong ; Choi, Byoung-Wook ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 29, issue 11, 2015, Pages 96~101
DOI : 10.5207/JIEIE.2015.29.11.096
In recent years, researches regarding optimal placement of CCTV(Closed-circuit Television) cameras via architecture modeling has been conducted. However, for analyzing surveillance coverage through actual human movement, the application of VA(Video Analytics) function of IP(Internet Protocol) cameras has not been studied. This paper compares two methods using data captured from real-world cameras and data acquired from a virtual environment. In using real cameras, we develop GUI(Graphical User Interface) to be used as a logfile which is stored hourly and daily through VA functions and to be used commercially for placement of products inside a shop. The virtual environment was constructed to emulate an real world such as the building structure and the camera with its specifications. Moreover, suitable placement of the camera is done by recognizing obstacles and the number of people counted within the camera's range of view. This research aims to solve time and economic constraints of actual installation of surveillance cameras in real-world environment and to do feasibility study of virtual environment.