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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Transactions of the Korean Institute of Electrical Engineers P
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Journal DOI :
The Korean Institute of Electrical Engineers
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Volume & Issues
Volume 55, Issue 4 - Dec 2006
Volume 55, Issue 3 - Sep 2006
Volume 55, Issue 2 - Jun 2006
Volume 55, Issue 1 - Mar 2006
Selecting the target year
Analysis of the Mean Energy in
Kim, Sang-Nam ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 57~61
This paper calculates and gives the analysis of mean energy in pure
mixture gases (
) over the range of
, p = 0.1, 1, 5.0 [Torr] by Monte Carlo the Backward prolongation method of the Boltzmann equation using computer simulation without using expensive equipment. The results have been obtained by using the electron collision cross sections by TOF, PT, SST sampling, compared with the experimental data determined by the other author. It also proved the reliability of the electron collision cross sections and shows the practical values of computer simulation. The calculations of electron swarm parameters require the knowledge of several collision cross-sections of electron beam. Thus, published momentum transfer, ionization, vibration, attachment, electronic excitation, and dissociation cross-sections of electrons for
and Ar, were used. The differences of the transport coefficients of electrons in
, mixtures of
and Ar, have been explained by the deduced energy distribution functions for electrons and the complete collision cross-sections for electrons. A two-term approximation of the Boltzmann equation analysis and Monte Carlo simulation have been used to study electron transport coefficients.
The Performance Evaluation and the Design of Controller for the Highly Efficient BLDC Motor using Numerical Analysis
Woo, Chun-Hee ; Park, Gun-Sik ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 62~66
This thesis focuses on the design of control schemes for highly efficient BLDC motor drive applications using drives with output capacity of 1Hp. The control system was designed and implemented on a PIC micro-controller and applied to an electric vehicle as a viable replacement to the existing a high phase induction motor that is currently being used for these low cost, small traction drive applications. This paper for the brushless drive research has shown the optimization of the drive system for improved drive design and switching techniques that can improve the entire drive system efficiency for electric vehicle both large and small traction applications using sinusoidal PWM techniques for synthesizing the AC waveforms needed to control these traction drives. In addition, Numerical simulation was conducted to evaluate the performance of designed BLDC Motor using MotorPro simulator.
A New Analysis for Load Unbalance Factor
Kim, Jong-Gyeum ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 67~72
Most of the load distributions in low voltage power feeder distribution systems are designed with approximately balanced and connected at the three phase four wire systems. However, in the user power distribution systems, most of the loads are single & three phase and unbalanced, generating load unbalance. Load unbalance factor is mainly affected by the impedance of load system. Unbalanced current will draw a highly unbalanced voltage. This paper presents a new calculation method for unbalance factor under the load variation at the three phase four wire system. Load unbalance factor is measured by the power quality measurement apparatus and compared with the current unbalance factor. Two methods are indicated similar results.
A Study on Network Game Based on Client/Server
Byun, Young-Ki ; Lee, Han-Kwon ; Kim, Jong-Gyeum ; Cho, Tae-Kyung ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 73~77
A server is simply a computer that is running software that enables it to serve specific requests from other computers, called 'clients.' Distributed systems are considered by some to be the 'next wave' of computing. A collection of probably heterogeneous distribution systems is transparent to the user so that the system appears as one local machine. This paper is going to search about whole of Client/Server distributed systems environment through network game. This paper presents game by one example of network game. The ladder game uses JAVA and embody to do random every time using Random function and remainder operation repeatedly. Analyze execution principle of network game through this tame and investigate about Client/Server's distributed environment through this.
High Performance Control of Induction Motor Drive using GAT
Ko, Jae-Sub ; Choi, Jung-Sik ; Chung, Dong-Hwa ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 78~82
This paper is proposed genetic algorithm tuning(GAT) control)or for high performance of induction motor drive. We employed GA to the classical PI controller. The approach having ability for global optimization and with good robustness, is expected to overcome some weakness of conventional approaches and to be more acceptable for industrial practices. The control performance of the GAT PI controller is evaluated by analysis for various operating conditions. The results of experiment prove that the proposed control system has strong high performance and robustness to parameter variation, and steady-state accuracy and transient response.
Implementation of an Intelligent Controller for Biped Walking Robot using Genetic Algorithm and Learning Control
Kho, Jaw-Won ; Lim, Dong-Cheol ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 83~88
This paper proposes a method that minimizes the consumed energy by searching the optimal locations of the mass centers of the biped robot's links using Genetic Algorithm. This paper presents a learning controller for repetitive gait control of the biped robot. The learning control scheme consists of a feedforward learning nile and linear feedback control input for stabilization of learning system. The feasibility of learning control to the biped robotic motion is shown via computer simulation and experimental results with 24 DOF biped walking robot.
Design and Fabrication of a Fire-damper using a Micro-Controller
Hwang, In-Gab ; Han, Jae-Gil ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 89~93
Recently as a people recognize a safety more about a high and large buildings the importance of a fire-damper which supplies fresh air into the building in case of fire increases greatly. Therefore, in this paper a fire-damper using a micro-controller is designed and fabricated. In the design of fire-damper a pressure sensor is modeled as a capacitor and the p-spice is used as a circuit simulator PIC16F72 is used as a micro-controller to drive a pressure sensor and to display a pressure value from the pressure sensor and to drive a motor to open and close a damper. A photo-coupler is used to protect a motor from a overcurrent.
Dynamic Performance Analysis of Unified Power Quality Conditioner with Cascaded H-Bridges
Han, Byung-Moon ; Soh, Yong-Cheol ; Kim, Hyun-Woo ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 94~102
This paper describes experimental analysis of UPQC, which is composed of cascaded H-bridges and single-phase multi-winding transformers. The operational characteristic was analyzed through experimental works with a scaled model, and simulations with PSCAD/EMTDC. The UPQC proposed in this paper can be directly connected to the distribution line without series injection transformers. It has flexibility to expand the operation voltage by increasing the number of H-bridge modules. The analysis results can be utilized to design the actual UPQC system applicable for the actual distribution system.
Adaptive Spatial Coordinates Detection Scheme for Path-Planning of Autonomous Mobile Robot
Lee, Jung-Suk ; Ko, Jung-Hwan ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 103~109
In this paper, the detection scheme of the spatial coordinates based on stereo camera for a intelligent path planning of an automatic mobile robot is proposed. In the proposed system, face area of a moving person is detected from a left image among the stereo image pairs by using the YCbCr color model and its center coordinates are computed by using the centroid method and then using these data, the stereo camera embedded on the mobile robot can be controlled for tracking the moving target in real-time. Moreover, using the disparity mad obtained from the left and right images captured by the tracking-controlled stereo camera system and the perspective transformation between a 3-D scene. and an image plane, depth information can be detected. Finally, based-on the analysis of these calculated coordinates, a mobile robot system is derived as a intelligent path planning and a estimation.
Experimental Verification According to an Accident Model in a Metal-Clad Switchgear at 22.9kV
Shong, Kil-Mok ; Han, Woon-Ki ; Choi, Chung-Seog ;
The Transactions of the Korean Institute of Electrical Engineers P, volume 55, issue 2, 2006, Pages 110~114
This paper describes the accident analysis by modelling the current transformer mounting in a metal-clad switchgear at 22.9kV. In analyzing the accident, the reconstruction at the current transformer mounting(VCB connecting guide) has to be taken into account. The accident was modelled as a 3-phase ground fault occurring between the end plate of 22.9kV lines and the safety shutter at the current transformer mounting of the VCB inside the metal clad switchgear. Since the outside maintenance of the metal clad switchgear is restricted by the enclosed compartments, Its circumference has to be kept clean. Through the reconstruction results, it was confirmed that the fault of the enclosed switchboard could be reduced when the shutter made of Fe material was chanted into an insulation.