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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
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Volume & Issues
Volume 28, Issue 12 - Dec 2014
Volume 28, Issue 11 - Nov 2014
Volume 28, Issue 10 - Oct 2014
Volume 28, Issue 9 - Sep 2014
Volume 28, Issue 8 - Aug 2014
Volume 28, Issue 7 - Jul 2014
Volume 28, Issue 6 - Jun 2014
Volume 28, Issue 5 - May 2014
Volume 28, Issue 4 - Apr 2014
Volume 28, Issue 3 - Mar 2014
Volume 28, Issue 2 - Feb 2014
Volume 28, Issue 1 - Jan 2014
Selecting the target year
A Study of Shielding Plate Development for Backlight Control : With a Main Focus on 50W Misaligned LED Luminaires
Park, Tae-Yeon ; Kim, Jung-Seok ; Kim, Hway-Suh ; Oh, Min-Seok ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 1~8
DOI : 10.5207/JIEIE.2014.28.11.001
Recently, damages resulting from light trespass that affects the human body (sleep) as one of light pollution control elements of outdoor Luminaires equipment are leading to continuous civil complaints and disputes and this is gradually expanding into a social problem. Accordingly, this study considers the need to develop a shielding plate in consideration of light distribution performance as an efficient measure to cope with damages from light trespass. Therefore, this study developed a shielding plate for LED Luminaires with a fine view that maximally inhibited light toward the backlight area compared to existing shielding plates and verified its performance.
External Resonant Ignitior for HID Lamps by Using the Transformer
Lee, Woo-Cheol ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 9~16
DOI : 10.5207/JIEIE.2014.28.11.009
The electronic ballast for HID lamps needs high ignition voltage which is consisted of high voltage pulse ignitor. However, In the case of street lamp it is far from a lamp to a ballast, the conventional pulsed high voltage ignitor can not turn on the HID lamps because of reduction of ignition voltage. Therefore, it needs to do the research on a resonant ignition to turn on the HID lamps. However, the resonant circuit which is consisted of LC occurs over current, so the capacity of the ignitor increases. The capacity of the ignitor can be reduced by using the transformer. In this case, the capacitor for resonance is installed to the secondary of the transformer, and the capacitor needs high withstanding voltage. Therefore, it needs to do the research on a resonant ignition to reduce the voltage over the resonant capacitor by dividing the secondary of the transformer.
A Novel MPPT Control of a Photovoltaic System using an FLC Algorithm
Ko, Jae-Sub ; Chung, Dong-Hwa ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 17~25
DOI : 10.5207/JIEIE.2014.28.11.017
This paper proposes a novel maximum power point tracking (MPPT) system using a fuzzy logic control (FLC) algorithm for robust in-environment changing. The power available at the output of a photovoltaic (PV) cell continues to change with radiation and temperature because a solar cell exhibits nonlinear current-voltage characteristics. Therefore, the maximum power point (MPP) of PV cells varies with radiation and temperature. The MPPT methods are used in PV systems to make full utilization of the PV array output power, which depends on radiation and temperature. The conventional MPPT control methods such as constant voltage (CV), perturbation and observation (PO) and incremental conductance (IC) have been studied but these methods are problematic in that they fail to take into account the changing environment. The proposed FLC controller is based on the fuzzy control algorithm and facilitates robust control with the environmental changes. Also, the PV systems applied FLC controller is modeled by PSIM and the response characteristics of the FLC method according to environmental variations are analyzed through comparison with the performance of conventional methods. The validity of this controller is shown through response results.
Analysis of High Current Copper Bus Bar Temperature in Smelting Plants
Kwak, Byung-Kil ; Kim, Changl-Hwan ; Choi, Byung-Ju ; Kim, Kyu-Ho ; Rhee, Sang-Bong ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 26~32
DOI : 10.5207/JIEIE.2014.28.11.026
In electrolysis smelting plants that using high DC current, the bus bar is most important facility for delivering the high current. The copper made bus bar is widely used for various advantages as good electrical and thermal conductivity, resonable malleability, ductility, and not rust easily. However, when high current in copper bus bar, temperature rises and maximum allowable current capacity is restricted by temperature of bus bar. In this paper, we investigated temperature variation of copper bus bar by putting cooling water channel imposed to bus bar construction. For the validity, various simulations were carried out.
Development of PWM Converter System for Sapphire Silicon Ingot Glowing of 80kW 10kA
Kim, Min-Huei ; Park, Young-Sik ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 33~41
DOI : 10.5207/JIEIE.2014.28.11.033
This paper is research result for a development of sapphire silicon ingot glowing(SSIG) PWM converter system for 80kW 10kA. The system include 3-phase AC-DC diode rectifier of input voltage AC 380V and 60Hz, DC-AC single phase full bridge PWM inverter of high frequency, AC-DC single-phase full wave rectifier using center-tapped of transformer for low voltage 8.0V and large current 10,000A of output specification, tungsten resistor load 0.1[
]. PWM switching frequency for IGBT inverter control set 30kHz. The suggested researching contents are designed data sheets of power converter system, PSIM simulation, operating characteristics and analysis results of developed SSIG system. This paper propose
The Study Of Optimum Method About The Architecture, Construction, And Maintenance Through The Construction Of Zero Energy House
Kim, Sun-Geun ; Kwon, Soon-Wook ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 42~50
DOI : 10.5207/JIEIE.2014.28.11.042
In the thesis, the case of zero energy house construction applied with various Active factors and Passive factors which is the real residence as a standard not a normal experimental residence was evaluated, analyzed, and organized. The thesis can be the base data to construct another similar case of zero energy house.
A Computing Method of a Process Coefficient in Prediction Model of Plate Temperature using Neural Network
Kim, Tae-Eun ; Lee, Haiyoung ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 51~57
DOI : 10.5207/JIEIE.2014.28.11.051
This paper presents an algorithmic type computing technique of process coefficient in predicting model of temperature for reheating furnace and also suggests a design method of neural network model to find an adequate value of process coefficient for arbitrary operating conditions including test conditons. The proposed neural network use furnace temperature, line speed and slab information as input variables, and process coefficient is output variable. Reasonable process coefficients can be obtained by an algorithmic procedure proposed in this paper using process data gathered at test conditons. Also, neural network model output equal process coefficient under same input conditions. This means that adquate process coefficients can be found by only computing neural network model without additive test even if operating conditions vary.
Design of LCL Filter through Inductor Optimization Method in Grid-Connected Inverter
Jang, Jae-Ha ; Kim, Kyeong-Hwa ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 58~67
DOI : 10.5207/JIEIE.2014.28.11.058
A grid-connected inverter used for renewable energy resources produces harmonic components in the switching frequency. To effectively reduce switching harmonic components, several types of filter are generally used in the output stage of the grid-connected inverter. Many research works on LCL filter design have been done to maintain the performance with low cost. However, it is not easy to make the filter design be economical and optimal due to the varying characteristic of magnetic core and redundancy design by experience. In this paper, a design method for a LCL filter is presented through the inductor optimization scheme in view of the size and cost when the inductor is manufactured using the magnetic core. The effectiveness is verified through tests using a 3kW grid-connected inverter by simulations and experiments.
A Study on Current Ripple Reduction Due to Offset Error in SRF-PLL for Single-phase Grid-connected Inverters
Hwang, Seon-Hwan ; Hwang, Young-Gi ; Kwon, Soon-Kurl ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 68~76
DOI : 10.5207/JIEIE.2014.28.11.068
This paper presents an offset error compensation algorithm for the accurate phase angle of the grid voltage in single-phase grid-connected inverters. The offset error generated from the grid voltage measurement process cause the fundamental harmonic component with grid frequency in the synchronous reference frame phase lock loop (PLL). As a result, the grid angle is distorted and the power quality in power systems is degraded. In addition, the dq-axis currents in the synchronous reference frame and phase current have the dc component, first and second order ripples compared with the grid frequency under the distorted grid angle. In this paper, the effects of the offset and scaling errors are analyzed based on the synchronous reference frame PLL. Particularly, the offset error can be estimated from the integrator output of the synchronous reference frame PLL and compensated by using proportional-integral controller. Moreover, the RMS (Root Mean Square) function is proposed to detect the offset error component. The effectiveness of the proposed algorithm is verified through simulation and experiment results.
State of Charge Estimation of Li-Ion Battery Based on CIM and OCV Using Extended Kalman Filter
Park, Joung-Ho ; Cha, Wang-Cheol ; Cho, Uk-Rae ; Kim, Jae-Chul ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 77~83
DOI : 10.5207/JIEIE.2014.28.11.077
The Estimation of State of Charge(SOC) for batteries is an important aspect of a Battery Management System(BMS). A method for estimating the SOC is proposed in order to overcome the individual disadvantages of the current integral and Open Circuit Voltage(OCV) estimation methods by combining them using Extended Kalman filter(EKF). The non-linear characteristics of the Li-Ion RC battery model used in this study is also solved through EKF. The proposed method is simulated in a Matlab environment with a Li-Ion Kokam battery (3.7V, 1,500mAh). Results showed that there is an improvement in the estimation error when using the proposed model compared to the conventional current integral method.
Three-Phase Isolated Capacitorless Charger with a Single-Stage Power Converter
Chae, Soo-Yong ; Hong, Soon-Chan ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 84~92
DOI : 10.5207/JIEIE.2014.28.11.084
In this paper, we propose a three-phase isolated electrolytic capacitorless charger available for quick charger. In the proposed charger, electrolytic capacitor in DC link is eliminated by direct conversion from AC input to DC output. Conventional chargers are two stage structure including AC-DC and DC-DC converters, but the proposed charger can be simplified into single stage converter by using a matrix converter. And the waveform of input currents is improved by giving the weighting factor to the duty ratio of auxiliary switches. In order to verify the effectiveness of the proposed charger, simulations are carried out and a 1.2kW charger was constructed and experimented.
Application of the Method of Moments to the Capacitance Computation of a Parallel-Plate Rectangular Capacitor
Roh, Young-Su ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 93~99
DOI : 10.5207/JIEIE.2014.28.11.093
The method of moments is applied to numerically compute the electrostatic capacitance of a parallel-plate rectangular capacitor of finite area. Each plate is discretized into 900 patches per unit area to ensure a high accuracy of computation. To further enhance computational results, the impedance matrix elements are additionally evaluated in the case that the observation patch is located above or below the source patch in the vertical direction. To examine the fringing effect at the edges of the capacitor, the normalized capacitances are computed as a function of separation distance. After these results have been verified by Palmer's formula, this method is extended to the computation of capacitances between two different size plates.
A study on the Noise Reduction of Uninterruptible Power Supply using Random PWM Method
Eom, Tae-Wook ; Lee, Byung-Soon ; Lee, Jae-Hak ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 100~105
DOI : 10.5207/JIEIE.2014.28.11.100
In this paper, Uninterruptible Power Supply(UPS) Inverter system using Carrier Frequency Modulated PWM (CFM-PWM) is proposed to reduced harmonics and electromagnetic noise. Power conversion of UPS system is executed by the ON-OFF operation of semiconductor switching devices. However, this switching operation causes the surge and EMI which deteriorate the reliability of the UPS system. This Problems improved by Random PWM switching method. The simulation results of the proposed system was compared with the system using conventional method using Matlab/Simulink. The results show that the output voltage and current harmonics of the proposed UPS system significantly decreased and spread into wide band area by the proposed Carrier Frequency Modulated PWM(CFM-PWM) method based on the Space Vector Modulation.
Tracking Control of Solar Power Plant Inverter using Model Predictive Control of Laguerre Functions
Cho, Uk-Rae ; Cha, Wang-Cheol ; Park, Joung-Ho ; Kim, Jae-Cheol ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 106~111
DOI : 10.5207/JIEIE.2014.28.11.106
Currently, the commonly used method for PWM(Pulse Width Modulation) Inverter of the Solar Power Plant. However, the limit of the developing performance to the non-linear and switch devices of the Inverter. Therefore, we propose a model predictive control techniques applied to Laguerre functions. LMPC(Laguerre functions model predictive control) reduces the number of computations made and so online implementation becomes possible where traditional MPC would have fail. In this paper, we comment on the appropriate scope and functions degree of the LMPC inverter control. The simulation results from MATLAB are also provided.
A Performance Improvement Method of PMSM Torque Control Considering DC-link Voltage Variation
Lee, Jung-Hyo ; Won, Chung-Yuen ;
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, volume 28, issue 11, 2014, Pages 112~122
DOI : 10.5207/JIEIE.2014.28.11.112
This paper proposes a PMSM torque control method considering DC-link voltage variation and friction torque. In general EV/HEV application, two dimensions look-up table(2D-LUT) is used for reference current generation due to its stable and robust torque control performance. Conventionally, this 2D-LUT is established by flux-torque table to overcome the DC-link voltage variation. However, the flux table establishment is more complex than the speed table establishment. Moreover, one flux data reflects several speed conditions in variable DC-link voltage, friction torque cannot be considered by using the flux table. In this paper, speed-torque 2D-LUT is used for current reference generation. With this table, PMSM torque control is well achieved regardless of DC-link voltage variation by the proposed control method. Simulation and experimental results validate improvement of torque control error through friction torque compensation.