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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
Editor in Chief :
Volume & Issues
Volume 8, Issue 4 - Oct 2008
Volume 8, Issue 3 - Jul 2008
Volume 8, Issue 2 - Apr 2008
Volume 8, Issue 1 - Feb 2008
Selecting the target year
An 18-Pulse Full-Wave AC-DC Converter for Power Quality Improvement
Singh, Bhim ; Gairola, Sanjay ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 109~120
In this paper, a novel delta/double-fork transformer based 18-pulse full-wave AC-DC converter is designed, modeled, simulated and developed to feed isolated DC varying loads. The proposed AC-DC converter is used for low voltage and large current DC loads in applications such as electrowinning, where isolation is required mainly for stepping down the supply voltage. The proposed converter improves power quality at AC mains and meets IEEE-519 standard requirements at varying loads.
Design and Implementation of a Digital Control Unit for an Oxygenaire Servo Baby Incubator
Zahran, Mohamed ; Salem, Mahmoud ; Attia, Yousry ; Eliwa, Aref ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 121~130
This paper introduces a design and implementation of a digital control unit for an Oxygenaire Servo Baby Incubator. The control unit is designed and implemented according to international standards. The control unit is based on an AVR Atmel microcontroller unit. It is built for monitoring and control and displays the three main temperature values: set point temperature, baby skin temperature and air temperature. User friendly software is implemented. The implemented control unit was tested in the laboratory as well as in the field. The control unit is sensitive to change of
. At startup, based on a unique control strategy, the incubator reaches its steady state in about 14 minutes. The system schematic diagrams are shown in the paper. Also, programs flow charts are presented. The control unit was designed and implemented based on a contract between the Electronics Research Institute (ERI) and ENGIMED Company. The authors would like to thank ERI and ENGIMED for introducing all required finance and shoring to complete this work.
An Improved Control Approach for DSTATCOM with Distorted and Unbalanced AC Mains
Singh, Bhim ; Solanki, Jitendra ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 131~140
This paper presents a new control approach of DSTATCOM (distribution static compensator) for compensation of reactive power, unbalanced loading and harmonic currents under unbalanced non-sinusoidal ac mains. The control of DSTATCOM is achieved using Adaline based current estimator based on LMS algorithm to maintain source currents real and undistorted. The dc bus voltage of voltage source converter (VSC) working as DSTATCOM is maintained at constant voltage using a proportional-integral (PI) controller. The DSTATCOM system alongwith proposed control scheme is modeled in MATLAB to simulate the behavior of the system. The practical implementation of the DSTATCOM is carried out using dSPACE DS1104 R&D controller having TMS320F240 as a slave DSP. Simulated and implementation results are presented to demonstrate the effectiveness of the DSTATCOM with Adaline based control to meet the severe load perturbations with different types of loads (linear and non-linear) under distorted and unbalanced AC mains.
Fuzzy Pre-Compensated PI Control of Active Filters
Singh, Bhim ; Singhal, Varun ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 141~147
This paper deals with a new and improved control technique for shunt active filters (AF) used for compensating unwanted harmonic currents injected in the mains due to nonlinear varying loads. This work is motivated by the need to find a permanent solution to the rigorous hit and trial method for evaluating system parameters in an indirect control of AF. A fuzzy pre-compensated PI (Proportional-Integral) controller is used to fuzzify the reference DC voltage of AF to the controller input so that the overshoots and undershoots in its DC link voltage are minimized and the settling time is improved. A three-phase diode rectifier with R-L (Resistive-Inductive) load is used as a non-linear load to study the effectiveness of the proposed controller of the AF. Robustness to filter parameter variations, insensitivity to controller parameter variations, and transient response has been taken as performance evaluation parameters. The results are shown through simulations in Matlab using power system block sets to demonstrate the capability of the proposed controller of the AF.
A Study of a Simple PDP Driver Architecture using the Transformer Network
Kim, Woo-Sup ; Shin, Jong-Won ; Chae, Su-Yong ; Hyun, Byung-Chul ; Cho, Bo-Hyung ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 148~155
In this paper, a cost-effective PDP driving circuit using the transformer network is proposed. Compared with the previous works, the half-bridge type energy recovery circuit recovers the reactive energy not to the capacitor but to the source. A single sustain board architecture removes the blocking switches which are placed on the discharge path in parallel, thus reducing the number of devices. A simple reset circuit generates the same waveforms as the previous approaches. The circuit configuration and modified driving waveforms are compared with the previous works. The validity of the proposed simplified driver is verified through tests using a 6-inch panel.
Cost-Effective Converters for Micro Wind Turbine Systems using PMSG
Park, Hong-Geuk ; Lee, Dong-Choon ; Kim, Heung-Geun ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 156~162
This paper proposes a low-cost power converter for micro wind turbine systems using permanent magnet synchronous generators (PMSG). The proposed converter consists of a two-leg three-phase PWM inverter for the generator control and a single-phase half-bridge PWM converter which is connected to the utility grid. For the two separate DC-link voltages, a balancing control is added and the adverse effect of the DC-link voltage ripples on the inverter output voltage is compensated. The control performance of the proposed converter topology for the micro wind turbine system is shown by the simulation results using PSIM software.
A Study on the PCS Characteristics of a 10kW BIPV System
Yoon, Hyung-Sang ; Cha, In-Su ; Yoon, Jeong-Phil ; Lee, Jeong-Il ; Seo, Jang-Su ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 163~170
A BIPV(Building Integrated PV) system is united by a constituent outer covering and can expect dual effects that reduce expenses for the establishment of a PV system. It is a profitable technology because it does not need a building as it is a stand alone PV system. In this paper, output characteristics analysis of PCS and web-based monitoring of 10kW BIPV, were stimulated and examined for validity. The BIPV system proposed in this paper was established in at BIC (Biotechnology Industrialization Center) of Dongshin University, which was composed with PCS and Web-monitoring system.
Harmonic Optimization Techniques in Multi-Level Voltage-Source Inverter with Unequal DC Sources
Aghdam, M. Ghasem Hosseini ; Fathi, S. Hamid ; Gharehpetian, Gevorg B. ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 171~180
One of the major problems in electric power quality is the harmonic contents. There are several methods of indicating the quantity of harmonic contents. The most widely used measure is the total harmonic distortion (THD). Various switching techniques have been used in static converters to reduce the output harmonic content. This paper presents and compares the two harmonic optimization techniques, known as optimal minimization of the total harmonic distortion (OMTHD) technique and optimized harmonic stepped-waveform (OHSW) technique used in multi-level inverters with unequal dc sources. Both techniques are very effective and efficient for improving the quality of the inverter output voltage. First, we describe briefly the cascaded H-bridge multi-level inverter structure. Then, we present the switching algorithm for the inverter based on OHSW and OMTHD techniques. Finally, the results obtained for the two techniques are analyzed and compared. The results verify the effectiveness of the both techniques in multi-level voltage-source inverter with non-equal dc sources, clarifying the advantages of each technique.
Detection of Incipient Faults in Induction Motors using FIS, ANN and ANFIS Techniques
Ballal, Makarand S. ; Suryawanshi, Hiralal M. ; Mishra, Mahesh K. ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 181~191
The task performed by induction motors grows increasingly complex in modern industry and hence improvements are sought in the field of fault diagnosis. It is essential to diagnose faults at their very inception, as unscheduled machine down time can upset critical dead lines and cause heavy financial losses. Artificial intelligence (AI) techniques have proved their ability in detection of incipient faults in electrical machines. This paper presents an application of AI techniques for the detection of inter-turn insulation and bearing wear faults in single-phase induction motors. The single-phase induction motor is considered a proto type model to create inter-turn insulation and bearing wear faults. The experimental data for motor intake current, rotor speed, stator winding temperature, bearing temperature and noise of the motor under running condition was generated in the laboratory. The different types of fault detectors were developed based upon three different AI techniques. The input parameters for these detectors were varied from two to five sequentially. The comparisons were made and the best fault detector was determined.
Basic Study of a Phase-Shifted Soft Switching High-Frequency Inverter with Boost PFC Converter for Induction Heating
Kawaguchi, Yuki ; Hiraki, Eiji ; Tanaka, Toshihiko ; Nakaoka, Mutsuo ;
Journal of Power Electronics, volume 8, issue 2, 2008, Pages 192~199
This paper is mainly concerned with a high frequency soft-switching PWM inverter suitable for consumer induction heating systems. The proposed system is composed of a soft switching chopper based boost PFC converter stage with passive snubber and phase shifted PWM controlled full bridge ZVZCS high frequency inverter stage. Its fundamental operating performances are illustrated and evaluated in the experimental results. Its effectiveness is substantially proved on the basis of the experimental results from a practical point of view.