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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Power Electronics
Journal Basic Information
Journal DOI :
The Korean Institute of Power Electronics
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Volume & Issues
Volume 4, Issue 4 - Oct 2004
Volume 4, Issue 3 - Jul 2004
Volume 4, Issue 2 - Apr 2004
Volume 4, Issue 1 - Jan 2004
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Static VAR Compensator-based Feedback Control Implementation for Self-Excited Induction Generator Terminal Voltage Regulation Driven by Variable-Speed Prime Mover
Ahmed, Tarek ; Nishida, Katsumi ; Nakaoka, Mutsuo ;
Journal of Power Electronics, volume 4, issue 2, 2004, Pages 65~76
In this paper, the steady-state analysis of the three-phase self-excited induction generator (SEIG) driven by a variable-speed prime mover (VSPM) such as a wind turbine is presented. The steady-state torque-speed characteristics of the VSPM are considered with the three-phase SEIG equivalent circuit for evaluating the operating performances due to the inductive load variations. Furthermore, a PI closed-loop feedback voltage regulation scheme based on the static VAR compensator (SVC) for the three-phase SEIG driven by the VSPM is designed and considered for the wind power generation conditioner. The simulation and experimental results prove the practical effectiveness of the additional SVC with the PI controller-based feedback loop in terms of fast response and high performances.
Power Module Bridge Type Auxiliary Resonant AC Link Snubber-Assisted Three-Phase Soft Switching Inverter
Hisashi Iyomori ; Nagai, Shin-ichiro ; Masanobu Yoshida ; Eiji Hiraki ; Mutsuo Nakaoka ;
Journal of Power Electronics, volume 4, issue 2, 2004, Pages 77~86
This paper presents a novel three-phase power module bridge type auxiliary resonant AC link snubber for the three-phase voltage-fed sinwave soft switching PWM inverter operating under specific instantaneous space voltage vector modulation. The operating principle of this resonant snubber is described for current source load model during one switching period, along with its design approach based on the simulation data. The performance evaluations of space vector modulation three-phase sinewave soft switching inverter with a new three-phase active auxiliary resonant AC link snubber are discussed as compared with those of three-phase voltage source-fed sinewave hard switching PWM inverter with a standard space voltage vector modulation strategy. The power loss analysis and conventional efficiency estimation of three-phase soft switching PWM inverter using ICBT modules are carried out including all the conduction power losses based upon the measured v-i characteristics of IGBT and its antiparallel diode as well as their switching losses.
Fast-Response Load Regulation of DC-DC Converter By High-Current Clamp
Senanayake, Thilak Ananda ; Ninomiya, Tamotsu ;
Journal of Power Electronics, volume 4, issue 2, 2004, Pages 87~95
A new fast-response high-current clamp DC-DC converter circuit design is presented that will meet the requirements and features of the new generation of microprocessors and digital systems. The clamp in the proposed converter amplifies the current in case of severe load changes and is able to produce high slew rate of output current and capability to keep constant the output voltage. This proposed high-current clamp technique is theoretically loss less, low cost and easy to implement with simple control scheme. This is modified from a basic buck topology by replacing the output inductor with two magnetically coupled inductors. Inductors are difference in inductance, one has large inductance and other has small inductance. The inductor with small inductance will take over the output inductor during fast load transient. It speedup the output current slew rate and reduce the output voltage drop in the case of heavy burden load changes.
Design and Control of SRM For LSEV Drive
Lee, Hee-Chang ; Lee, Man-Hyung ; Ahn, Jin-Woo ;
Journal of Power Electronics, volume 4, issue 2, 2004, Pages 96~101
This paper presents an application of SRM drive for LSEV(Low Speed Electric Vehicle). In this paper, a 5〔㎾〕 SRM for a traction of a LSEV is to design and investigate the characteristics of the drive system. The main design parameters and control strategy are given. In the control method, a current control, for the soft-starting technique at a starting operation, is adopted. In the high speed range, an angle control technique is implemented, for a high efficiency drive of SRM. Some experimental tests are executed to find the drive performances.
Robust Deadbeat Current Control Method for Three-Phase Voltage-Source Active Power Filter
Nishida, Katsumi ; Ahmed, Tarek ; Nakaoka, Mutsuo ;
Journal of Power Electronics, volume 4, issue 2, 2004, Pages 102~111
This paper is concerned with a deadbeat current control implementation of shunt-type three-phase active power filter (APF). Although the one-dimensional deadbeat control method can attain time-optimal response of APF compensating current, one sampling period is actually required fur its settling time. This delay is a serious drawback for this control technique. To cancel such a delay and one more delay caused by DSP execution time, the desired APF compensating current has to be predicted two sampling periods ahead. Therefore an adaptive predictor is adopted for the purpose of both predicting the control error of two sampling periods ahead and bringing the robustness to the deadbeat current control system. By adding the adaptive predictor output as an adjustment term to the reference value of half a source voltage period before, settling time is made short in a transient state. On the other hand, in a steady state, THD (total harmonic distortion) of the utility grid side AC source current can be reduced as much as possible, compared to the case that ideal identification of controlled system could be made.
The Study on the Electrical Characteristics of the Pulse Generator adopted Cascading Technique
Joung, Jong-Han ; Kim, Moon-Hwan ;
Journal of Power Electronics, volume 4, issue 2, 2004, Pages 112~116
The pulsed power systems have been widely used many other countries and their new applications have been developed by many researchers, such as E/P(Electrostatic Precipitator) to remove the industrial dust, DeNOx/DeSOx power systems, ozone generators and power sources of the laser beam, etc. In this paper, we studied the cascading technique as a new technology consisted of two pulse transformers and obtained their experimental data and results. To obtain the high pulsed voltage adopted cascading technique, we designed our compact pulse generator and tested by adjusting the value of the load resistors to obtain high pulsed voltage with steep rising time and duration time. We explained their experimental results that obtained by adopting cascading technique. Also, we compared theoretical value with measured value obtained by using the cascading method.
Electrical Modeling of Renewable Energy Sources and Energy Storage Devices
Williamson, Sheldon S. ; Rimmalapudi, S.Chowdary ; Emadi, Ali ;
Journal of Power Electronics, volume 4, issue 2, 2004, Pages 117~126
This paper focuses on the electrical modeling techniques of renewable energy sources and storage devices such as batteries, fuel cells (FCs), photovoltaic (PVs) arrays, ultra-capacitors (UCs), and flywheel energy storage systems (FESS). All of these devices are being investigated recently for their typical storage and supply capabilities for various industrial applications. Hence, these devices must be modeled precisely taking into account the concerned practical issues. An obvious advantage of electrically modeling these renewable energy sources and storage devices is the fact that they can easily be simulated in real-time in any CAD simulation program. This paper reviews several types of suitable models for each of the above-mentioned devices and the most appropriate model amongst them is presented. Furthermore, a few important applications of these devices shall also be highlighted.