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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Transactions of the Korean Institute of Power Electronics
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Journal DOI :
The Korean Institute of Power Electronics
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Volume & Issues
Volume 11, Issue 6 - Dec 2006
Volume 11, Issue 5 - Oct 2006
Volume 11, Issue 4 - Aug 2006
Volume 11, Issue 3 - Jun 2006
Volume 11, Issue 2 - Apr 2006
Volume 11, Issue 1 - Feb 2006
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A Study on 6-pulse-shift Current-source PWM Inverter for Photovoltaic System
Lim, Joung-Min ; Lee, Sang-Hun ; Park, Sung-Jun ; Moon, Chae-Joo ; Chang, Young-Hak ; Lee, Man-Hyung ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 193~200
This paper suggests a 6-pulse-shift converter structure with PWM current-source inverter based on buck-boost configuration to improve the efficiency and to reduce the switching frequency of inverter for photovoltaic generation system, the device can be operated as interface system between solar module system and power system grid without energy storage cell. The circuit has six current-source buck-boost converter which operate chopper part and kas one full bridge inverter which make a decision the polarity of AC output. Therefore, the proposed PWM power inverter has advantages such as the reduction of witching loss and realization of unity power factor operation. The theoretical backgrounds are discussed and the input-output characteristics for the implemented prototype inverter using TMS320F2812 are verified experimentally in this paper.
The Operating System of High-power LED module with Back-Boost Mode
Chung, Ji-Hyun ; Song, Sung-Geun ; Park, Sung-Jun ; Chang, Young-Hak ; Moon, Chae-Joo ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 201~208
An alternative to the nuclear and fossil fuel power is renewable energy technologies (hydro, wind, solar and ocean), and the research about the highest efficiency machinery have been processed. The high-power LED is the representative one among those. In this paper, a high efficiency lighting system using a battery charged with solar or wind power is proposed for a high power LED. And a new efficient converter called 'Back-boost' is proposed. The validity of the lighting system scheme is verified by experimental results based on a laboratory prototype.
New Double-Connected Multi-Step Inverter for High Power Motor Drive Applications
Yang, Seung-Uk ; Choe, Gyu-Ha ; Mok, Hyung-Soo ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 209~215
Now, in this paper, going to present you with an Idea related to a new inverter of multi-step voltage source, that Is, the double-connected 12-step inverter with an auxiliary circuit. It possibly can be 24-step inverter with 3-phase voltage source which will enable us make full application even to medium and high power-level Motor drive, UPS, STATCOM, SVC, etc. in which the PWM method could not be employed. 24-step operation can be obtained from the link between the existing 12-step inverter and the additional auxiliary circuit in which the transformer of auxiliary circuit generates ripple voltage delivered to the inverter. Through a lot of experiments and simulations, (from which the validity of this scheme is confirmed,) we came to the conclusion that the increase of the primary winding number on transformer by 2N(N=1,2,3....) leads to the 12M-step(M=2,3,4...) inverter. The validity of the proposed scheme is confirmed by the simulated and experimental results.
A Contact-less Power Supply for Photovoltaic Power Generation System
Lee, Hyun-Kwan ; Kong, Young-Su ; Kim, Yoon-Ho ; Lee, Gi-Sik ; Kang, Sung-In ; Chung, Bong-Geun ; Kim, Eun-Soo ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 216~223
The high efficiency full-bridge LLC resonant converter using a contact-less transformer Is proposed for the photovoltaic power generation system. For the series resonance with a series capacitor, the LLC resonant converter utilizes the leakage inductance and magnetizing inductance of a contact-less transformer Unlike the conventional series resonant converter operated to the continuous resonant current at above resonance frequency, the proposed converter operates to the discontinuous resonant current at the narrow frequency control range below resonance frequency. Due to the discontinuous mode resonant current, the proposed converter can be achieved the zero voltage switching (ZVS) in the primary switches and the zero current switching (ZCS) in the secondary rectification diodes without my auxiliary circuit. In this paper, the experimental results of the proposed full-bridge LLC resonant converter using a contact-less transformer are verified on the simulation based on the theoretical analysis and the 150W experimental prototype.
ANN Sensorless Control of Induction Motor with AFLC Controller
Choi, Jung-Sik ; Ko, Jae-Sub ; Chung, Dong-Hwa ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 224~232
The paper proposes the artificial neural network(ANN) sensorless control of induction motor drive with adaptive fuzzy logic controller(AFLC). Also, this paper proposes the speed control of induction motor using AFC and estimation of speed using ANN controller. The back propagation neural network technique is used to provide a real time adaptive estimation of the motor speed. The error between the desired state variable and the actual one is back-propagated to adjust the rotor speed, so that the actual state variable will coincide with the desired one. The proposed control algorithm is applied to induction motor drive system controlled AFLC and him controller. And this paper is proposed the results to verify the effectiveness of the AFLC and ANN controller.
Implementation of Multi-Channel Power Components Measuremen System
Lee, Myung-Un ; Yoo, Jae-Geun ; Lee, Sang-Ick ; Cho, Myung-Hyun ; Choe, Gyu-Ha ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 233~238
In order to solve power disturbances, power components measurement for both supply and demand side of power system must be implemented. This paper proposed a DSP (Digital Signal Processor)-based multi-channel (voltage 8-channel and current 10-channel) power components measurement system that simultaneously can measure and analyze power components for both supply md demand side. After voltage and current measurement accuracy revision using YOKOGAWA 2558, the developed system was tested in the field.
Equivalent RMS Sine-wave Modulation of the Step-pulse type Multi-level Inverter
Jin, Sun-Ho ; Kwak, Jun-Ho ; Jo, Kwan-Jun ; Oh, Jin-Seok ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 239~246
This paper suggests a new modulation strategy for step pulse type multi-level inverter. The proposed strategy is simple to determine the switching angles without regard to increase of levels. Designed to extract the equivalent RMS value compared to ideal sine wave from inverter, it can be applied effectively to high level step pulse inverter. Also this paper proposed modulation strategy for modified H-bridge 13 level inverter which has different cell source voltages with simulation and experiment. The modulation characteristics from simulation and experiment, agreed very well with tracing sine wave about modified structure of cascaded H-bridge multi-level inverter.
Study on the Operating Characteristics of Double Fed Induction Generator Connected AC network
Kim, Chan-Ki ; Han, Sang-Yul ; Choo, Jin-Boo ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 247~257
This paper shows the comparison of operating characteristics between squirrel cage induction generator and DFIG(Double Fed Induction Generator). Because squirrel cage induction generator consume the reactive power due to magnetizing reactance, the capacitor is need to compensate the reactive power. Otherwise, two back-to-back PWM voltage-fed inverters connected between the stator and the rotor allow sub/super synchronous operation with low distortion currents. In this paper, the response characteristics of squirrel cage induction generator and DFIG, were analyzed and investigated using PSCAD/EMTDC.
Design of Suitable a New Active Clamp Sepic-Flyback Converter for a Fuel Cell Generation System
Lee, T.W. ; Jang, S.J. ; Kim, S.S. ; Lee, B.K. ; Kim, H.S. ; Won, C.Y. ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 258~265
In this paper, an active clamping sepic-flyback converter has been proposed, which is suitable for a fuel cell based power generation system. The proposed converter is superposition of sepic converter mode and flyback mode. It has outstanding high boosting output voltage, component utilization and high efficiency characteristics under the inherently severe low output voltage of the fuel cell generator. In this paper, the validity of the proposed converter has been verified by the informative simulation and experimental results that make used of the PEMFC.
The Stabilized Speed Control Modeling of Single-side Linear Induction Motor Considering End-effect
Lim, Hong-Woo ; Chae, Bong ; Choi, Moon-Han ; Lee, Kang-Yeon ; Cho, Geum-Bae ; Baek, Hyung-Lae ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 266~273
In difference with the rotary type electrical machinery, the single-sided linear induction motor(SLIM) that generates the direct thrust, is widely used for the operation system of electrified railroad, lope-less elevation system, conveyer system, and so on. The operational principle of single-sided linear induction motor is constructively similar to the general rotary Induction motor It Is difficult to realize the complicate linear induction motor which is applied space vector pulse width modulation(SVPWM) system, but widely used in vector motor control system or servo control system because of its high performance in current control. In this paper, we has modeled the dynamic characteristic analyzing methode, and calculated efficiently the end effect by using equivalent circuit methode in the operating linear Induction motor control system.
A Vibration Rejection of Linear Feeder System with PMSM using Adaptive Notch Filter
Lee, Dong-Hee ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 274~283
The Permanent Magnet Synchronous Motor(PMSM) drive systems with ball-screw, gear and timing-belt are widely used in industrial applications such as NC machine, machine tools, robots and factory automation. These systems have torsional vibration in torque transmission from servo motor to mechanical load due to the mechanical couplings. This vibration makes it difficult to achieve quick responses of speed and may result in damage to the mechanical plant. This paper presents adaptive notch filter with auto searching function of vibration frequency to reject the mechanical vibration of linear feeder system with PMSM. The proposed adaptive notch filter can suppress the torque command signal of PMSM in the resonant bandwidth for reject the mechanical torsional vibration. However, the resonant frequency can vary with conditions of mechanical load system and coupling devices, adaptive notch filter can auto search the vibration frequency and suppress the vibration signal bandwidth. Computer simulation and experimental results shows the verification of the proposed adaptive notch filter in linear feeder system with PMSM.
A Study on AFPM(Axial Flux Permanent Magnet)Motor without Stator Corer
Park, Jong-Chan ; Choi, Hae-Ryong ; Choe, Gyu-Ha ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 3, 2006, Pages 284~291
Recently with the motorizing of electric home appliances and car systems, there is increasing interest in high efficiency electric motors. Thus, the present study described the operating characteristics of coreless AFPM motor that is highly efficient in high speed driving, and discussed its electric characteristics from the perspective of design. In particular, we examined back electromotive force and the magnetic field characteristic in slits, which have significant effects on the characteristic of the motor, and conducted simulation and experiment on control characteristic according to inductance characteristic. This study analyzed torque speed and efficient operation characteristic as well as control characteristic through comparing the result of motor design with the result of output characteristic experiment based on the electric network method. Furthermore, we evaluated vibration and noise that may occur due to the absence of core.