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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 6, Issue 6 - Dec 2001
Volume 6, Issue 5 - Oct 2001
Volume 6, Issue 4 - Aug 2001
Volume 6, Issue 3 - Jun 2001
Volume 6, Issue 2 - Apr 2001
Volume 6, Issue 1 - Feb 2001
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Role and Operation Algorithm of a Battery Management Systems
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 467~473
BMS(Battery Management System) in EV system(Electric Vehicle) senses voltage, temperature and the charging or discharging current of batteries. The main roles of BMS are to estimate SOC(State OF Charge) of batteries and optimally monitor them according to the operation state of EV system which is motoring mode or charging mode. In this paper, we propose the proper algorithm about BMS's roles and operation which is suitable to EV system and illustrate validity and effectiveness through the experiments which were performed in the condition of Vehicle road test and charging test.
A Signal Anti-reduction System in PLC using Ferrite Core and Switching Amplifier
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 474~480
In this paper a low signal reduction communication system that does not use the communication line but power line is presented It will be very useful for an information-oriented society with tele-metering and home automation. The conventional system has a difficulty in transmitting information due to decreasing communication voltage. The proposed system employs a special type switching amplifier system which has a low inner resistance and uses high efficient ferrite core in coupling circuit. This new system is proposed to reduce the loss of conductor load and coupling circuit in a PLC system.
High Efficient Energy Recovery Circuit for AC Plasma Display Panel
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 481~488
The sustaining driver for color AC Plasma Display Panel should provide alternating high voltage pulses and recover the energy discharged from the intrinsic capacitance between the scanning and sustaining electrodes inside the panel In this paper a novel efficient energy recovery circuit employing boost-up function is proposed to achieve a faster rise-time and in order to obtain a stable sustain voltage The principle of operation. features simulated results and experiment results are illustrated and verified on a 7.5-inch-panel with 200［kHz］switch frequency.
A Modular UPS Design with an Active Multiple Interphase Reactor and Double PLL Control
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 489~497
The proposed dobule phase locked loop and active multiple interphase reactor are used to eliminate the circular current and the voltage ripples caused by the system parameter unbalance of parallel connected UPSs. In this paper, digital controller for the dobule PLL and active interphase reactor is implemented with ADSP21061 as an aspect of functional convenience.
MPPT Control of PV Water Pumping Using BLDC Motor-Inverter
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 498~505
This paper shows how to design a global control of water pumping system using PV array, and tracked maximum power point of PV array only the inverter using the vector control of BLDC motor, and finding the relationships among the DC magnitudes and AC ones in order to omit the DC/DC converter. Conventional MPPT controller was unstable of reason of the ripple-current of DC link in three-phase invertor. Thus, in this paper the control algorithm of BLDC motor using
current is composed to improve the insecurity of conventional MPPT controller To prove the excellence of the proposed method, the contents of this paper is analyzed by means of simulation and testing for the results applying the method that J. A Domfnguez had applied to asynchronous motor to BLDC motor and that of the proposed method in this paper.
Study on Switching Angle Characteristics for Driving Performance Improvement of SRM Drive
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 506~513
The torque of an SRM depends on the phase current and derivative of inductance. But an SRM is difficult to control the desired torques because of saturation in magnetic circuit An SRM is controlled by parameters of input voltage, and switch on , off angle The switch on off angles of an SRM regulate the magnitude and shape of current waveform and decide the magnitude and shape of torque This paper proposes an the optimization control scheme by adjusting both the switch on an switch off angle . The switch off angles are decided by reference of efficiency using simulation and experiments. The switch on angles are decided by load torque , And the dwell angles are controlled for torque control and speed control using GA-neural network which is used to simulated the reasonable switching angle.
The Average Power Algorithm of Active Power Filters for Asymmetrical Three-Phase Three-Wire Power System
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 514~524
Conventional average power theory has been used to design and control active power filters But compensating reference currents of active power filters calculated by conventional average power theory are definitively influenced by three phase source voltage conditions such as unbalance or distortion. This paper presents a new average power algorithm for active power filters which can detect symmetrically equally active or fundamental reactive currents in each phase based on decomposition of fundamental reactive component and harmonics under unbalanced power conditions. The effectiveness of the proposed algorithm is demonstrated by MATLAB/SIMULINK simulation and experimental results for a three wire distribution system with 15% unbalanced source voltages.
A New Space Vector Random PWM Scheme for Inverter Fed Drive Systems
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 525~537
In this paper a new space vector RPPWM(Random Position PWM) is proposed. In the propsed RPPWM each of three phase pulses is located randomly in each switching interval. Based on the Space vector modulation technique the duty ratio of the pulses is calculated Along with the randomization of the PWM pulses. we can obtain the effects of spread spectra of votlage, current as in the case of randomly changed switching frequency, To verify the validity of the proposed RPPWM simulation study was tried using Matlab/Simulink The main model described in Simulink block diagrams includes the space vector modulation block pulse position randomization block inverter block 3 phase induction motor block and so on By the simulation study, the harmonics of the output voltage and the current of inverter are predicted in different PWM methods- SVPWM, LLPWM proposed RPPWM.
Development of High-Speed Elevator Drive System using Permanent-magnet Synchronous Motor
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 538~545
In this paper a gearless drive system using a permanent-maget synchronous motor for high speed elevators is addressed. The application of permanent magnet synchronous motor to an elevator traction machine enables several improvements including higher efficiency better ride comfort smaller size and lighter weight and so on A PWM boost converter has been also adopted so that DC-link voltage regulation bi-directional power flow and controllable power factor with reduced input current harmonics are possible. To increase the reliability and performance of overall control system the unified control board which can include the car and group controller as well as PWN converter/inverter controller has been designed based on a DSP TMS320VV33. In addition the dynamic load simulator system has been developed so that the drive system of high speed elevator can be tested and evaluated without and limitation on ride distance. Some experimental results are given to verify the effectiveness of the developed system.
Output Filter Design for Conducted EMI Reduction of PWM Inverter-Fed AC Motor Drive System
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 546~555
In this paper filtering techniques to reduce the adverse effects of motor leads on high-frequency PWM inverter fed AC motor drives are presented. The filter was designed to keep the motor terminal from the cable surge impedance to reduce overvoltage reflections ringing and the dv/dt, di/dt, at the motor terminals. Specially the output filter is used to limit the rate of the inverter output voltage and reduce common mode noise to the motor, The performance of the output filter is evaluated through simulations and experiment on PWM inverter-fed AC motor drive. An experimental PWM drive system reduction of conducted EMI was implemented on an available TMS320C31 microprocessor control board Finally, experimental result shows inverter output filter reduces more common mode voltage than low pass filter also reduce overoltage and ringing at the motor terminal.
A New Zero-Current-Transition Buck Converter
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 556~563
In this paper a new zero current transition pulse width modulation (ZCT-PWM) buck converter is proposed to combine the desirable feature of both the conventional buck converter and resonant converters. In this proposed scheme an auxiliary circuit is added to the conventional buck converter and used to achieve soft-switching for both the main switch and the freewheeling diode while not incurring any additional losses due to auxiliary circuit And this converter operates exactly like the conventional PWM converter except for a short particular time interval. The operation of the proposed converter is explained and analyzed. and design guidelines are presented. To validate the feasibility of the proposed converter, a 100KHz 180-W prototype is built and tested.
VLSI Design of Low Voltage DC/DC Converter using Zero Voltage Switching Technique
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 564~571
This paper presents the VLSI design of highly efficient low voltage DC/DC converter for portable devices. All active devices are integrated on a single chip using a standard 0.65
CMOS process. The converter operates at the switching frequency of 1MHz for reducing the size of passive elements and uses a ZVS for minimizing the switching loss at high frequency. Simulation results show that the circuit can achieve a 95% efficiency when the output voltage is controlled to be 2V with the load of lW.
Design and Operational characteristics of a Heat Pipe Heat Sink for Cooling of Power Semiconductors
The Transactions of the Korean Institute of Power Electronics, volume 6, issue 6, 2001, Pages 572~581
A heat pipe heat sink device which is to evacuate maximum heat of about 1800W from a powersemiconductor was designed and manufactured One set of cooling device os composed of an Aluminum block (130
35mm) 4 PFC heat pipes
and 126 Aluminium fins (250
0.8mm) Experimental data obtained at a power of 1~2kW revealed that the total thermal resistance of the device varied 0.02~0.018
/W along with increasing air velocity from 2m/s to 3 m/s. The result represented a good satisfaction of requirement condition to maintain temperature rise of semiconductor lowe that
at 1800W and air velocity of 3 m/s Some important resistance such as convective resistances at both fins and heat pipes showed good agreement between mathematical predictions and measurement data.