Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Transactions of the Korean Institute of Power Electronics
Journal Basic Information
Journal DOI :
The Korean Institute of Power Electronics
Editor in Chief :
Volume & Issues
Volume 10, Issue 6 - Dec 2005
Volume 10, Issue 5 - Oct 2005
Volume 10, Issue 4 - Aug 2005
Volume 10, Issue 3 - Jun 2005
Volume 10, Issue 2 - Apr 2005
Volume 10, Issue 1 - Feb 2005
Selecting the target year
High Performance Control of Linear Hybrid Stepping Motor with Force Ripple Compensator
Hwang Tai-Sik ; Seok Jul-Ki ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 527~533
The linear hybrid stepping motors (LHSM) has been widely used due to its simple structure and low cost control. Despite of its attractive features, the conventional LHSM has the multiples of 4th times harmonic reluctance force from excitation current and cogging force from space harmonic of permeance. This paper propose a new LHSM, which the mechanical and electrical phase difference are
. The proposed motor shows a unique ability to deliver low detent force and we propose a closed-loop control scheme to attack the ripple force for high performance applications. An analytical and experimental comparison between conventional and proposed LHSM is evaluated to confirm the effectiveness of the proposed modeling and control scheme.
Vector Control of a Permanent Magnet Synchronous Motor for Elevators Using Fuzzy Controller
Yu Jae-Sung ; Hwang Sun-Mo ; Won Chung-Yuen ; Kim Sang-Hoon ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 534~542
This paper proposes the fuzzy logic based vector control method for a Surface Mounted Permanent Magnet Synchronous Motor(SMPMSM) used in the elevators. The gain of a conventional PI speed controller in the elevator drive system can not be usually set high due to mechanical resonances, therefore its performance becomes deteriorated. There have been many methods to solve above problems such as an acceleration feedback in the speed controller. However, the above methods have defects that parameter information is demanded. In this paper', a Fuzzy controller(FC) is adopted in the elevator drive system. The performance of a fuzzy controller is compared with a PI controller in the no load and load conditions by simulation and experiments.
Carrier-based Modulation Method for Matrix Converter
Yoon Young-Doo ; Sul Seung-Ki ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 543~549
This paper presents a carrier-based modulation method for the control of a matrix converter. By using the offset voltage and changing the slope of the carrier, it is possible to synthesize sinusoidal input currents with unity power factor and the desired output voltages. The proposed method is equivalent to the so called SVPWM (Space Vector PWM) method, but its implementation is much easier. Moreover, the proposed method is very attractive because it is possible to apply the 2 phase t 3 phase modulation method, overmodulation method and other methods which are well-developed in the study of voltage source inverters (VSI) to the matrix coverter modulation. The feasibility of the proposed modulation method has been verified by computer simulation and experimental results.
Design and Implementation of Matrix Converter Based on Space Vector Modulation
Yang Chun-Suk ; Yoon In-Sik ; Kim Kyung-Seo ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 550~559
The matrix converter provides sinusoidal input and output wave forms, bidirectional power flow, controllable input power factor and a long life, compared to the VSI(Voltage Source Inverter) with diode rectification stage at the input. However it has tasks, such as complexity of the control method, ride-through problem and low voltage-ratio limitation, to overcome for commercializing, This paper describes the design, construction and implementation of matrix converter based on space vector modulation technique. The implemented prototype of matrix converter is built using the exclusive IGBT module and control circuit constituted with DSP and CPLD and it has an input filter, overvoltage protection circuit and commutation means for overcoming practical issues. The good results tested using an induction motor are also presented.
A Study on Performance Characteristics of Multi-level PDP Driver Circuit in Accordance of Signal Timing Variation
Kim Jung-Soo ; Roh Chung-Wook ; Hong Sung-Soo ; Sakong Sug-Chin ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 560~568
The proposed Multi-level PDP sustain Driver is composed of the semiconductor devices with low voltage rating compared to those used in the prior circuit proposed by L. Wether, and it has two resonant periods during the charging (rising period) and discharging (falling period) the PDP in the sustaining voltage waveforms. In accordance with the change of timing phase
, the performance characteristics of a commercial PDP module has been carried out and compared the characteristic with the 42V6, made of LG Electronics co., Experimental results show that the performance characteristics of PDP module are greatly influenced by the variation of
. The variation of
do not influence much on the performances of PDP. With the conditions that
, we could get the performances listed as the luminance is increased
, the power consumptions is decreased
, the panel efficiency is increased
, module efficiency is increased
, compared to those shown in the commercial PDP module (42V6). Therefore, the proposed multi-level PDP sustain driver expected to be suitable to actual PDP module application.
SRM Drive System Using 6-switch IGBT Module
Kim Yuen-Chung ; Yoon Yong-Ho ; Lee Won Cheol ; Lee Byoung-Kuk ; Won Chung-Yuen ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 569~577
In this paper, a new control scheme to use 6-switch IGBI module for 3-phase switched reluctance motors(SRM) is proposed. Compared with the conventional asymmetric bridge converter topology, it can minimize the entire system size and cost. Therefore, it may have a new topology lot SRM to compare the other ac motors, such as induction motors, brushless dc motors, and so on. The validity of the proposed method is verified by simulation, and experimental results.
A High Efficiency Power Conversion Circuit with Wide ZVS Range for Large Screen PDP Sustaining Power Module
Park Kyung-Hwa ; Moon Gun-Woo ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 578~586
Recently, due to the launch of digital broadcasting service, the demand of Flat Panel Display (FPD) is sharply rising. Among them, the PDP is expected to be one of the most promising digital displays of next generation because of its large screen size, high resolution, thinness and board field of view. Meanwhile, the PDP uses ADS (Address Display-period Separation) scheme which divide one subfield into address and sustaining period to express the grey scale of images. Since the output of sustaining power module Is mostly used for sustaining period, the load of the sustaining power module can be considered as a pulsating load. Due to this particular load condition, if the wide ZVS range of the power switches is not guaranteed, the hard switching causes large amount of switching loss and serious thermal problem in power module. In this paper, a high efficiency power conversion circuit for 60' PDP sustaining power module which achieves wide ZVS range with the help of additional ZVS tank is proposed. According to the various gating methods, the different operations of the proposed converter are presented. And, to confirm the properties of the proposed converter, an experimental prototype of 900W power converter is constructed md tested. As a result, more than
of high efficiency is obtained at
load condition, and the ZVS operation is achieved from full load to
Reset Waveform Generation Circuit Adapting To Temperature Change
Shin Min-Ho ; Kim Cheul-U ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 587~591
Driving Waveform of AC PDP in reset periode is increased and decreased with constant slope to improve dark room contrast ratio and image quality. But the slope and magnitude of ramp waveform are related to strong and weak discharge with temperature change in AC PDP. So this paper proposes a methods of changing the slope and magnitude of ramp waveform during reset periode according to temperature change in AC PDP. Experimental variable factors ire chosen to setup slope, setdown slope, and -Vy voltage magnitude in Y sustain electrode. The proposed methods are expected to compensate for effect of the temperature change, causing misfiring in high and low temprature, with varing the slope and magnitude of ramp voltage during reset period and improve image quality.
Single Core Push Pull Forward Converter Operational Characteristics
Kim Chang-Sun ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 592~597
The push pull forward converter is suitable in a low output voltage, a high output current applications with wide input voltage ranges. All magnetic components including output inductor, transformer and input filter can be integrated into single EI/EE core. The integrated push pull forward converter is considered through the comparison of efficiency according to the circuit parameters. The Nicera company's 5M FEE18/8/10C and NC-2H FEI32/8/20 cores are used for the transformer. The integrated push pull forward converter ratings are of
input and 3.3V/30A output. In case that NC-2H FEI32/8/20 core used in the converter, the efficiency is measured up to
at the switching frequency 200 kHz and the 11A load. The efficiencies of
at a full load and
at a half load are measured.
Voltage Oscillation Reduction Technique for Phase-Shift Full-Bridge Converter
Park Ki-Bum ; Kim Chong-Eun ; Moon Gun-Woo ; Youn Myung-Joong ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 598~609
Conventional phase shift full bridge (PSFB) converter has serious voltage oscillation problem across the secondary rectifier diodes, which would require the dissipate snubber circuit, thus degrades the overall efficiency. To overcome this problem a new simple voltage oscillation reduction technique (VORT) which effectively reduce the voltage oscillation of the secondary rectifier diodes for phase shift full bridge converter is proposed. Therefore, no dissipate snubber for rectifier diodes is needed. In addition, since it has wide zero voltage switching (ZVS) range, high efficiency can be achieved. Operational principle, analysis of voltage oscillation, and design consideration are presented compare with that of the conventional PSFB converter. To confirm the validity of the proposed VORT, experimental results from a 420W prototype are presented.
PSCAD/EMTDC Simulation Model of Variable Speed Wind Power Generation System Using Permanent Magnet Synchronous Machine
Kim Jeong-Jae ; Song Seung-Ho ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 610~617
A variable speed wind turbine simulation model for grid connection is developed based on PSCAD/EMTDC. The model consists of wind model, rotor dynamics, synchronous generator, power converter, transformer, distribution line and infinite bus. Implementation of blade characteristics and power converter control strategies are included. Several transient case studies are performed including wind speed change, local load change and grid-side voltage unbalance using developed simulation model. The results of this work can be utilized for study of actual interaction between wind turbine and grid for reliable operation and protection of power system.
Low Power Design on Heater and Cathode of Electron Gun for High Resolution CRT
Kim Hack-Sung ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 618~625
This paper has achieved that an optimal design and experiments of heater and cathode of electron gun that serve to embody high current density in CRT display. For the high brightness, high resolution and larger size in CRT display, high current density of electron gun is indispensible. An Impregnation style cathode is used, and must heighten operating temperature of heater to get high current density for this, it is proportional hereupon and power dissipation increases. In this paper, to get low power cathode with high current density, There are produced and tested sample that differ lead type of heater, coating method, the pitch and number of winding of the first and second coiling in the heat emission area for the low power design of high current density cathode heater in this paper.
2MVA SSFG(Sag Swell Flicker Generator) Development for Actual Test of Custom Power Device
Kim H.J. ; Chung Y.H. ; Kwon G.H. ; Park T.B. ; Moon J.I. ; Jeon Y.S. ;
The Transactions of the Korean Institute of Power Electronics, volume 10, issue 6, 2005, Pages 626~633
This paper proposes a new 2MVA SSFG(Sag Swell Flicker Generator) injecting voltage by using series inverter. The proposed SSFG composes series inverter, DC capacitor as energy storage, rectifier and voltage clamp circuit. This SSFG is designed to generate typical power disturbances, such as voltage sag/swell, over/under voltage and voltage flicker. Also it is designed to generate unexpected voltage phase jumping waveform by controlling the series inverter. In this paper, three kinds of control methods for the proposed 2MVA SSFG we investigated by PSIM simulation. Also typical voltage sag, swell, flicker waveforms are implemented by adopting effective control method.