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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
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Journal DOI :
The Korean Institute of IIIuminating and Electrical Installation Engineers
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Volume & Issues
Volume 26, Issue 12 - Dec 2012
Volume 26, Issue 11 - Nov 2012
Volume 26, Issue 10 - Oct 2012
Volume 26, Issue 9 - Sep 2012
Volume 26, Issue 8 - Aug 2012
Volume 26, Issue 7 - Jul 2012
Volume 26, Issue 6 - Jun 2012
Volume 26, Issue 5 - May 2012
Volume 26, Issue 4 - Apr 2012
Volume 26, Issue 3 - Mar 2012
Volume 26, Issue 2 - Feb 2012
Volume 26, Issue 1 - Jan 2012
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Measurement and Analysis of Adaptation Luminance in the Threshold Zone of the Road Tunnel
Han, Jong-Sung ; Lee, Min-Wook ; Kim, Hoon ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 1~7
DOI : 10.5207/JIEIE.2012.26.1.001
As the standard lighting required in the threshold zone of a road tunnel is determined by the enough contrast. Lighting design, therefore, must be determined by the calculation method of threshold luminance based on the adaptation luminance of the driver approaching the tunnel. The veiling luminance and the luminance in the access zone were measured at different time and in different weather using the veiling luminance method, a kind of perceived contrast methods, and the L20 method when the range of vision was 20 degrees. On the basis of the measured data each threshold luminance was calculated and its results were analyzed.
Development of Economic Evaluation of Indoor Lighting System
Cho, Sook-Hyun ; Lee, Min-Wook ; Choi, Hyeon-Seok ; Kim, Hoon ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 8~14
DOI : 10.5207/JIEIE.2012.26.1.008
An economic evaluation is required to reduce the cost of energy and lighting in the design of interior lighting. WEELS2011 is developed as a method of economic evaluation for LED lighting systems. Economic evaluation for fluorescent and LED lightings and after applying rebate to LED system is conducted using WEELS2011. The utilization and analysis of WEELS2011 are suggested for the reduction of energy and lighting cost.
Fabrication and Characterization of 2-Wavelength White OLED with Single Emissive Layer
Kim, Hyun-Jung ; Yang, Seong-Yong ; Yi, Chin-Woo ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 15~21
DOI : 10.5207/JIEIE.2012.26.1.015
In this study, the characteristics of the 2-wavelength white organic light-emitting diod (WOLED) with two colors of yellow and blue were compared and analyzed with 3-wavelength WOLED with three colors of red, green, and blue. The results indicated that the power efficiency of the 2-wavelength WOLED was 1.6 times higher than 3-wavelength WOLED. In addition, the colot coordinate of the 2-wavelenth WOLED which was (0.34, 0.39) was found closer to the optimal color coordinate for the white-lighting application when compared with that of the 3-wavelength WOLED.
Decision of Lighting Power Density for Office Building Lighting
Lee, Sang-Jin ; Lee, Min-Wook ; Kim, Hoon ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 22~28
DOI : 10.5207/JIEIE.2012.26.1.022
To identify energy savings when comparing lighting designs or evaluating installed lighting, it is necessary to analyze the consumption of lighting power with respect to the electricity consumed and the lighting area. In Korea, however, these factors have not been considered in lighting design. In this paper, the lighting power-related standards on indoor lighting in foreign countries have been analyzed. It is determine appropriate lighting power consumption for indoor by calculating the energy consumption has been estimated in a lighting design adopted domestic luminaire used.
Dead Time Compensation Scheme for a PWM Inverter-fed PMSM Drive Using MRAC Scheme and Coordinate Transformation
Kim, Kyeong-Hwa ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 29~37
DOI : 10.5207/JIEIE.2012.26.1.029
A simple and effective dead time compensation scheme for a PWM inverter-fed permanent magnet synchronous motor (PMSM) drive using the model reference adaptive control (MRAC) and coordinate transformation is presented. The basic concept is to first transform a time-varying disturbance caused by the dead time and inverter nonlinearity into unknown constant or slowly-varying one by the coordinate transformation, and then use the MRAC design technique to estimate this parameter in the stationary reference frame. Since the MRAC scheme is a suitable way of estimating such a parameter, the control performance can be significantly improved as compared with the conventional observer-based method tracking time-varying parameters. In the proposed scheme, the disturbance voltage caused by the dead time is effectively estimated and compensated by on-line basis without any additional circuits nor existing disadvantages as in the conventional methods. The asymptotic stability is proved and the effectiveness of the proposed scheme is verified.
Development of an Intelligent Power Plant Operating State Monitoring System
Hong, Chang-Ho ; Kim, Seok-Hyun ; Lee, Seung-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 38~43
DOI : 10.5207/JIEIE.2012.26.1.038
For safe and stable operations of power plants, it is essential to monitor closely crucial measurement values related to power plant trips. In this paper, an intelligent power plant operating state monitoring technique enabling the operating crew member to monitor conveniently the status of the important measurement values and to perceive almost instantly the significance of the implications of those measurement values is developed. The proposed technique is called a "POST(Plant Operating State Tracking) Chart" technique and provides the foundations in developing an intelligent and integrated power plant operating state monitoring support system called the "P-OASIS"(Plant Operation Assessment and Support Intelligent System). The P-OASIS is applied to a thermal power plant of 500[MW] capacity and exhibited impressive performances.
Calculation of the Area of Vulnerability to Voltage Sags by using Impedance Building Algorithm
Park, Jong-Il ; Park, Chang-Hyun ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 44~53
DOI : 10.5207/JIEIE.2012.26.1.044
This paper presents a method to calculate the area of vulnerability by using the impedance building algorithm. The installation of DG (Distributed Generation) is one of the countermeasures against voltage sags in power systems. In order to estimate the effect of the DG, the voltage sag assessment should be performed based on the area of vulnerability and system fault statistics. To determine the area of vulnerability, system impedance matrix should be calculated. The calculation of the impedance matrix of large systems is time-consuming task. This paper addresses an effective scheme to calculate the area of vulnerability and system impedance matrix.
Analysis of the Grounding Impedance of a Ground Rod Considering the Frequency-Dependent Resistivity and Relative Permittivity of Soil
Ahn, Chang-Hwan ; Choi, Jong-Hyuk ; Lee, Bok-Hee ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 54~60
DOI : 10.5207/JIEIE.2012.26.1.054
When the transient current with high frequency components such as lightning surges are injected the grounding electrodes, the performance of grounding electrodes should be evaluated as grounding impedance. It is restricted to analyze the grounding impedance by measurement approach since the grounding impedance is very different with the shape and size of grounding electrodes, resistivity and relative permittivity of soil and the frequency component of the injected current. So a variety of simulation approaches have been developed. Typically, the soil resistivity measured with low frequency and relative permittivity between 1 and 80 are used for simulation of the grounding impedance. However, the resistivity and relative permittivity of soil are changed with frequency of injected current. In this paper, the frequency-dependent resistivity and relative permittivity of soil are measured and these parameters are reflected in the simulation of the grounding impedance of a ground rod. The simulated results are compared with the measured results. As a result, the simulated results with frequency-dependent soil parameters show capacitive aspect like measured results in the frequency of lower than 100[kHz] and they are more consistent with the measured results in wide frequency range.
Considerations on the Performance of Current Sensorless Control of a Synchronous Reluctance Motor
Shin, Myoung-Ho ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 61~65
DOI : 10.5207/JIEIE.2012.26.1.061
Some works about the current sensorless control of a synchronous reluctance motor have been presented. However, there is no analysis about the performance and the detuning effect of the current sensorless control. This paper presents the problems and the detuning effect of the current sensorless control of a synchronous reluctance motor by simulation results. In addition, torque limiter is proposed to limit the torque current within the torque limit.
A Direct Torque Control System for Improving Speed Response of Five-Phase Induction Motor
Kim, Min-Huei ; Choi, Sung-Un ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 66~74
DOI : 10.5207/JIEIE.2012.26.1.066
This paper propose a improved direct torque control(DTC) system for improving operation of five-phase squirrel-cage induction motor(IM). A five-phase IM drives present unique characteristics due to the additional degrees of freedom and also drives possess many others advantage compared with the traditional three-phase motor drive system, such as reducing a amplitude of torque pulsation and increasing the reliability. In order to maximize the torque per ampere, the proposed motor has concentrated windings and the produced back-electromotive force(EMF) is almost trapezoidal, and the motor is supplied with the combined sinusoidal plus third harmonic of currents, there is necessary to controlled 3rd harmonic current. Also a DTC method is advantageous when it is applied to the five-phase IM, because the five-phase inverter provides 32 space vectors in comparison to 8 space voltage vectors into the three-phase inverter drive system. For presenting the superior performance of the proposed DTC, experimental results of speed control are presented using a 32-bit fixed point TMS320F2812 DSP with 1.5[hp] IM.
A Study on the Wireless Power Transfer System using Magnetic Resonance at the 1[MHz] Frequency Band
Park, Jeong-Heum ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 75~81
DOI : 10.5207/JIEIE.2012.26.1.075
In this paper, the wireless power transfer system using the magnetic resonance was designed, analyzed by circuit analysis methode and the calculated transfer function was compared with the measured one. The self-resonant coil was made up of the commonly used capacitor which had the lumped capacitance and it enabled the stable magnetic resonance not to be affected by the circumstance. The transmission efficiency of this system was 70[%] at the 15[cm] between the transmission and receiving coil and the measured transfer function was similar to the calculated one, which means the circuit analysis methode is valid in this system. When the intermediate coils were added between the transmission and receiving coil, the transmission efficiency was increased, which produced the increase of transfer distance. In the case of the five intermediate coils adding, the 35[%] transmission efficiency was achived at the 90[cm] distance.
Study for the Design and Measurement of the High Voltage Pulse Generator Using Transformers
Kim, Young-Ju ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 82~86
DOI : 10.5207/JIEIE.2012.26.1.082
High-capacity high-voltage pulse generator that can be used for environmental clean-up was developed using transformers. High-voltage pulse is consists of the primary wave and the harmonic wave which are increased as a series circuit using transformers to make pulses. Each transformer has a band-pass characteristics. The output voltage of the pulse width 50[%] was decided. The output voltage of high-voltage pulse generator device was measured as 1.4[kV] (Peak-to-Peak).
Improved TDMA with Superframe Structure-based CSMA/CA MAC protocol for Wireless Body Area Network
Lee, Jae-Soo ; Ahn, Jeong-Keun ; Yun, Chan-Young ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 26, issue 1, 2012, Pages 87~93
DOI : 10.5207/JIEIE.2012.26.1.087
Due to the development of information and communication, there is a rising interest on WBAN(Wireless Body Area Network) that maintain and check the human being health. According to the application of different quality of service and a special mechanism for transferring medical data are required in WBAN environment. In this paper, we proposed the new formed superframe that has CSMA/CA based TDMA scheduling and CSMA/CA used IEEE 802.15.4 in order to process emergency data and on-demand data in WBAN environment. We estimated performance of the proposed MAC protocol by compared performance of other MAC protocols that are IEEE 802.15.4 MAC protocl and Z-MAC protocol has contention access period based TDMA scheduling.