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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 2, Issue 4 - Dec 1997
Volume 2, Issue 3 - Sep 1997
Volume 2, Issue 2 - Jun 1997
Volume 2, Issue 1 - Mar 1997
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Computer Modeling and Temperature Estimation method of Capacitor Discharge Impulse magnetizer-Magnetizing Fixture System
The Transactions of the Korean Institute of Power Electronics, volume 2, issue 2, 1997, Pages 1~7
A New Low Loss Quasi Parallel Resonant DC-Link Inverter with Variable Lossless Zero Voltage Duration
The Transactions of the Korean Institute of Power Electronics, volume 2, issue 2, 1997, Pages 8~18
In this paper, a New Low Loss Quasi-Parallel Resonant DC-Link(NLQPRDCL) Inverter which shows highly improved PWM capability, low loss characteristic and low voltage stress is presented. A method to minimize freewheeling interval, which is able to largely decrease DC-link operation losses and to steadily guarantee soft switching in the wide operation region is also proposed. In addition, lossless control of zero voltage duration of DC-link makes the proposed inverter maintain the advanced PWM capability even under a very low modulation index. Experiment and simulation were performed to verify validity of the proposed inverter topology.
LCL Type Series Resonant Converter with PWM Control Method
The Transactions of the Korean Institute of Power Electronics, volume 2, issue 2, 1997, Pages 19~28
A simple AC complex circuit analysis for LCL type series resonant converter with phase shift control is proposed. Based on these analyses, a set of characteristic curves which allows a optimal design procedure for this converter is shown, without increasing the volt-ampere rating of tank circuit. Especially, inverter output peak current can be minimized in both full load and partial load conditions. The presented design considerations can make the load range wide from full loads to light loads achieving turn-on with zero voltage switching (ZVS) operation. The simulation and experimental results show the effectiveness of the proposed design algorithms.
Instantaneous Control of a Single-phase PWM Converter Considering the Voltage Ripple Estimate
The Transactions of the Korean Institute of Power Electronics, volume 2, issue 2, 1997, Pages 29~34
In this paper, instantaneous controller of a single-phase PWM converter is realized using DSP. The stable PI gain of the input current and the DC link voltage control system is designed. The DC link voltage control system can be designed in continuous- time domain. But as for the input current control system, the descretizing effect cannot be ignored so it must be designed in descrete-time domain considering the calculation time. The capacitance estimating algorithm which can be acquired through the ripple voltage is proposed. By this algorithm the DC link capacitance can be estimated even under the transient state. Experimental results show the input power factor of 99.1% and the voltage variation rate of
5% according to the load variation.
A Study on Noise Reduction Characteristics of Active Noise Controller Using Hysteresis Control Method
The Transactions of the Korean Institute of Power Electronics, volume 2, issue 2, 1997, Pages 35~40
The hysteresis control method has been frequently used for current control of power conversion equipments or motor drive systems. This method makes the measured signal follow the reference signal by changing the control signal whenever the error signal exceeds the preset band width. In this paper, hysteresis control method with fast response characteristics is applied for active noise control to suppress acoustic noise. Both Pentium processor and sound blaster 16 are used for experimental implementation, which executes A/D, D/A conversion and also is used as operating source of loudspeaker for audible noise cancellation.
A Study on Conducted EMI Emission Characteristics in 3-Phase PWM Converter
The Transactions of the Korean Institute of Power Electronics, volume 2, issue 2, 1997, Pages 41~48
Nowadays, EMI emission characteristics, which causes harmful effect on power distribution system and other equipments, have been studied in field of Power electronics, vigoriously. So, in this paper, the conducted EMI emission is measured and compared for 3-phase diode rectifier and PWM converter according to switching frequency variation and current control method change using LISN(Line Impedance Stabilization Network) and spectrum analyzer.
Driving of Switched Reluctance Motor to Reduce Torque Ripple
The Transactions of the Korean Institute of Power Electronics, volume 2, issue 2, 1997, Pages 49~56
Switched Reluctance Motors(SRMs) have a considerable inherent torque ripple due to the driving characteristics of pulse current waveform and the nonlinear variation inductance profile. This paper describes a current shape characteristics to effect a torque ripple reduction, and one pulse mode switching control method is proposed to minimize torque ripple of a switched reluctance motor regardless of speed and load condition by regulating tow parameters, such as, advance angle and exciting voltage. The experiments are performed to verify the capability of proposed switching method on 6/4 salient type SRM.
A New Energy Recovery Snubber for Boost Converter
The Transactions of the Korean Institute of Power Electronics, volume 2, issue 2, 1997, Pages 57~63
The power diode's reverse recovery current when switching on the main switch results in losses of the switch in boost converter. The high turn-on losses can be controlled by snubber circuit. In this paper, a new snubber circuit which can reduce the turn-on current stress mentioned above and recover trapped snubber energy in capacitor is proposed for boost converter. The control of boost converter with proposed snubber is the same as the conventional one. In addition, the energy recovery circuit can be implemented with a few passive components. The analysis for proposed circuit is presented, and the validity of the circuit is verified through simulation and experiment.