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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 6, Issue 4 - Oct 2006
Volume 6, Issue 3 - Jul 2006
Volume 6, Issue 2 - Apr 2006
Volume 6, Issue 1 - Jan 2006
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An Adaptive Dead-time Compensation Strategy for a Permanent Magnet Synchronous Motor Drive Using Neural Network
Urasaki Naomitsu ; Senjyu Tomonobu ; Funabashi Toshihisa ; Sekine Hideomi ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 279~289
This paper presents a neural network based adaptive dead-time compensation strategy for an inverter fed permanent magnet synchronous motor drive. The neural network is used for identifying the dead-time compensation time (DTCT) that includes an equivalent dead-time, turn-on/off time and on-state voltage components of the voltage source inverter. In order to train the neural network, desired DTCTs for eight operating points are prepared as training data. The trained neural network can identify a desired DTCT for any operating point because it has the capability of the interpolation. The accuracy of the identified DTCT is experimentally confirmed by comparing the calculated active power with a measured one.
Detent Force Reduction of a Tubular Linear Generator Using an Axial Stepped Permanent Magnet Structure
Eid Ahmad M. ; Lee Hyun-Woo ; Nakaoka Mutsuo ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 290~297
Various methods have been discussed to reduce detent force in a tubular permanent magnet type linear single phase AC generator. In particular, the proposed methods depend on variations of the permanent magnet construction. These methods include two approaches in the form of sloped magnets, and conical magnets in addition to the conventional method of optimizing the magnet length. The undesired detent force ripples were calculated by a two dimensional Finite Element Method (FEM). Moreover, the generated electromotive force in the stator coils was calculated for each configuration of the permanent magnet. The experimental results agreed well with those obtained from the FEM-based simulations. Sufficient reduction in the detent force was achieved over the range of 40% while the root mean square of the output voltage was maintained. It was found that sloping the permanent magnet decreased the detent force and at the same time increased the generated rms voltage of the AC generator. The performance of the designed linear AC generator was evaluated in terms of its efficiency, total weight, losses, and power to weight ratio.
A Simple ZVZCS Sustain Driver for a Plasma Display Panel
Yi Kang-Hyun ; Han Sang-Kyoo ; Choi Seong-Wook ; Kim Chong-Eun ; Moon Gun-Woo ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 298~306
A high efficiency and low cost sustain driver for a plasma display panel (PDP) utilizing a current pumping method is proposed. The main concept of the proposed circuit is using the current source to charge and discharge the panel. As a result, all power switches can achieve zero voltage switching (ZVS) and every auxiliary switch can also achieve zero current switching (ZCS). Since the inductor current can compensate for the discharge current, the current stress of all the power switches can be reduced considerably. Furthermore, it has features such as a simpler structure, less mass, lower cost, and lower electromagnetic interference than in previous circuits.
Power Disturbance Classifier Using Wavelet-Based Neural Network
Choi Jae-Ho ; Kim Hong-Kyun ; Lee Jin-Mok ; Chung Gyo-Bum ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 307~314
This paper presents a wavelet and neural network based technology for the monitoring and classification of various types of power quality (PQ) disturbances. Simultaneous and automatic detection and classification of PQ transients, is recommended, however these processes have not been thoroughly investigated so far. In this paper, the hardware and software of a power quality data acquisition system (PQDAS) is described. In this system, an auto-classifying system combines the properties of the wavelet transform with the advantages of a neural network. Additionally, to improve recognition rate, extraction technology is considered.
Modeling of a Switched Reluctance Motor in Sensorless and 'With Sensor' Modes
Bhuvaneswari G. ; Thakurta Sarit Guha ; Rao P. Srinivasa ; Murthy S.S. ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 315~321
Switched Reluctance Motors (SRM) have emerged as viable alternatives to other adjustable speed drives such as vector controlled induction motors (VCIM) and permanent magnet brush-less (PMBL) motors due to their simple construction, ease of control, low inertia and higher operating speeds. However, the indispensability of the rotor position sensor in an SRM for its successful operation increases its cost, apart from causing other problems like decreasing its reliability and inability to operate in adverse environmental conditions. In this paper, a new sensorless control scheme for the SRM is advocated. The required fundamental data is obtained by analyzing the SRM using the Finite Elements (FE) package MAXWELL. The drive is studied in both 'with sensor' and 'sensorless' modes and a comparison of the performances, in both cases, is presented for various operating conditions.
A Novel Technique for Tuning PI-Controllers in Induction Motor Drive Systems for Electric Vehicle Applications
Elwer Ayman Saber ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 322~329
In the last decade, the increasing restrictions imposed on the exhaust emissions from internal combustion engines and traffic limitations have increased the development of electrical propulsion systems for automotive applications. The goal of electrical and hybrid vehicles is the reduction of global emissions, which in turn leads to a decrease in fuel resource exploitation. This paper presents a novel approach for control of Induction Motors (IM) using the Particle Swarm Optimization (PSO) algorithm to optimize the parameters of the Proportional Integral Controller (PI-Controller). The overall system is simulated under various operating conditions. The use of PSO as an optimization algorithm makes the drive robust and insensitive to load variation with faster dynamic response and higher accuracy. The system is tested under variable operating conditions. The simulation results show a positive dynamic response with fast recovery time.
Electronic Ballast Using a Symmetrical Half-bridge Inverter Operating at Unity-Power-factor and High Efficiency
Suryawanshi Hiralal M. ; Borghate Vijay B. ; Ramteke Manojkumar R. ; Thakre Krishna L. ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 330~339
This paper deals with novel electronic ballast based on single-stage power processing topology using a symmetrical half-bridge inverter and current injection circuit. The half-bridge inverter drives the output parallel resonant circuit and injects current through the power factor correction (PFC) circuit. Because of high frequency current injection and high frequency modulated voltage, the proposed circuit maintains the unity power factor (UPF) with low THD even under wide variation in ac input voltage. This circuit needs minimum and lower sized components to achieve the UPF and high efficiency. This leads to an increase in reliability of ballast at low cost. Furthermore, to reduce cost, the electronic ballast is designed for two series-connected fluorescent lamps (FL). The analysis and experimental results are presented for (
Watt) fluorescent lamps operating at 50 kHz switching frequency and input line voltage (230 V, 50 Hz).
High Efficiency Drive Technique for Synchronous Reluctance Motors Using a Neural Network
Urasaki Naomitsu ; Senjyu Tomonobu ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 340~346
A high efficiency drive technique for synchronous reluctance motors (SynRM) using a neural network (NN) is presented in this paper. High efficiency drive condition depends on the mathematical model of SynRM. A NN is employed as an adaptive model of SynRM. The proposed high efficiency drive technique does not require an accurate mathematical model of SynRM. Moreover, the proposed method shows robustness against machine parameter variations because the training algorithm of the NN is executed on-line. The usefulness of the proposed method is confirmed through experimentation.
Robust Adaptive Precision Position Control of PMSM
Ko Jong-Sun ; Ko Sung-Hwan ; Kim Yung-Chan ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 347~355
A new control method for precision robust position control of a permanent magnet synchronous motor (PMSM) is presented. In direct drive motor systems, a load torque disturbance directly affects the motor shaft. The application of the load torque observer is published in using a fixed gain to solve this problem. However, the motor flux linkage cannot be determined precisely for a load torque observer. Therefore, an asymptotically stable adaptive observer base on a deadbeat observer is considered to overcome the problems of unknown parameters, torque disturbance and a small chattering effect. To find the critical parameters the system stability analysis is carried out using the Liapunov stability theorem.
Advanced Three-Phase PFC Power Converters with Three-Phase Diode Rectifier and Four-Switch Boost Chopper
Nishimura Kazunori ; Hirachi Katsuya ; Hiraki Eiji ; Ahmed Nabil A. ; Lee Hyun-Woo ; Nakaoka Mutsuo ;
Journal of Power Electronics, volume 6, issue 4, 2006, Pages 356~365
This paper presents an improved three-phase PFC power rectifier with a three-phase diode rectifier cascaded four-switch boost converter. Its operating principle contains the operating principle of two conventional three-phase PFC power rectifiers: one switch boost converter type and a two switch boost converter type. The operating characteristics of the four switch boost converter type three-phase PFC power rectifier are evaluated from a practical point of view, being compared with one switch boost converter type and two switch boost converter topologies.