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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 18, Issue 6 - Dec 2013
Volume 18, Issue 5 - Oct 2013
Volume 18, Issue 4 - Aug 2013
Volume 18, Issue 3 - Jun 2013
Volume 18, Issue 2 - Apr 2013
Volume 18, Issue 1 - Feb 2013
Selecting the target year
An Improved Battery Charging Algorithm for PV Battery Chargers
Kim, Jung-Hyun ; Jou, Sung-Tak ; Lee, Kyo-Beum ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 507~514
DOI : 10.6113/TKPE.2013.18.6.507
In this paper, the proposed charging algorithm is converted from the charging mode to compensate the transient state in the solar battery charging system. The maximum power point tracking (MPPT) control methods and the various charging algorithms for the optimal battery charging are reviewed. The proposed algorithm has excellent transient characteristics compare to the previous algorithm by adding the optimal control method to compensate the transient state when the charging mode switches from the constant current mode to the constant voltage mode based on the conventional constant-current constant-voltage (CC-CV) charging algorithm. The effectiveness of the proposed method has been verified by simulations and experimental results.
New PCS Applied High Boost Ratio Dual Converter and Single Phase Half Bridge Inverter
Lee, Hee-Jun ; Shin, Soo-Choel ; Hyun, Seung-Wook ; Jung, Yong-Chae ; Won, Chung-Yuen ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 515~522
DOI : 10.6113/TKPE.2013.18.6.515
In this paper, a new PCS is proposed which is consisted of high boost dual converter and single phase half-bridge inverter. The proposed PCS is configured in parallel input / serial output, using two interleaved voltage doubler converter. Converter of the proposed PCS is distribute input current by configuring parallel input and reduced turn ratio of transformer by configuring serial output. Also, compositions of the inverter are composed of serial output capacitor of converter and half-bridge inverter. The dual converter and single phase half-bridge inverter is designed and characteristic of the new PCS is analysed. The system of the 1.5[kW] PCS is verified through an experimental about operation and stability.
Sensorless Speed Control and Starting Algorithm using Current Control of SPM Synchronous Motor
Baik, In-Cheol ; Lee, Ju-Suk ; Kim, Hag-Wone ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 523~529
DOI : 10.6113/TKPE.2013.18.6.523
A sensorless speed control of a permanent magnet synchronous motor(PMSM) which utilizes MRAS based scheme to estimate rotor speed and position is presented. Considering an error between real and estimated rotor position values, a state equation of PMSM in the synchronous d-q reference frame is represented. A state equation of model system which uses estimated speed and nominal parameter values is expressed. To minimize the errors between the derivatives of d-q axis currents of real and model system, MRAS based adaptation mechanisms for the estimation of rotor speed and position are derived. On the other hand, for the acceleration stage of motor just before the sensorless operation, an acceleration scheme using only d-axis current control is proposed. To show the validity of the proposed scheme, experimental works are carried out and evaluated. During acceleration stage, the acceleration scheme using only d-axis current command shows good acceleration performance and controlled current level. For the sensorless operation, at low speed (5% of rated speed), a good performance is observed.
An Output Control Algorithm for Phase Shift Full Bridge Converter for Ballast Water Treatment
Lee, Sang-Ri ; Kim, Hag-Wone ; Cho, Kwan-Yuhl ; Jung, Ho-Chul ; Kim, Jong-Hyug ; Park, Gwi-Cheol ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 530~539
DOI : 10.6113/TKPE.2013.18.6.530
In large vessels, proper water level must be maintained with a balance for right and left equilibrium by absorbing or draining sea water in ballast water tank. However, this ship's ballast-water can be drained marine organisms to local sea area by world trade and this can be a source of ecological disturb. In order to solve these problems, marine organisms must be removed in accordance with the international covenant for the emission of microorganisms. By this reason, the seawater electrolysis rectifier of low-voltage high-current rectifiers with excellent ability for microbial treatment is required. In this paper, PSFB converter will be discussed for the seawater electrolysis rectifier. Furthermore, a new output control method with the power limit operation under the limited maximum voltage condition is proposed for this rectifier. The simulation for the proposed current control method for PSFB Converter is shown using MATLAB/SIMULINK. Finally the usefulness of the proposed control method is presented by the experimental results.
Advanced Field Weakening Control for Maximum Output Power Operation of Seawater Cooling Pump Induction Motor in a Limited Environment
Son, Yung-Deug ; Seo, Yong-Joo ; Jung, Jun-Hyung ; Kim, Jang-Mok ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 540~546
DOI : 10.6113/TKPE.2013.18.6.540
The induction motor is used for driving the special equipments such as warship and submarine pump due to robust structure and simple maintenance. Domestic and foreign warships use a wide range of voltages and the DC voltage sources mainly from battery. In the low voltage level, the
-connection operation of induction motor can be used for the maximum power. However, the temperature of the inverter increases because of the high input current. On the other hand, Y-connection operation of the induction motor does not cause a problem of temperature because of the low input current compared to the
-connection. But the lack of the supply voltage can not be avoided. Therefore, this paper suggests the algorithm of the optimum field weakening control to extend the operating range of the induction motor with maximum power in a limited thermal and DC voltage condition.
An Interleaved PWM Buck Converter with a Soft Switching Auxiliary Circuit
Lee, Eui-Cheon ; Choi, Hyun-Chil ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 547~555
DOI : 10.6113/TKPE.2013.18.6.547
This paper proposes the interleaved buck converter using a soft switching auxiliary circuit. In this scheme, an auxiliary circuit is added to the conventional interleaved buck converter and used to achieve soft-switching conditions for both the main switch and freewheeling diode. In addition, the switch in the auxiliary circuit operates under soft-switching conditions. Also, according to the input to output conditions, the main switch achieved zero-current-transition(ZCT) or zero-current & zero-voltage-transition(ZCZVT) at turn on. Thus, the proposed interleaved buck converter provides a higher efficiency. The basic operations, in this paper, are discussed and design guidelines are presented. The usefulness of the proposed converter is verified on a 200kHz, 180W prototype converter.
Initial Rotor Position Detection a PM Synchronous Motor and Speed Control of an Elevator Door
Song, Ki-Young ; Oh, Hyun-Cheal ; Cho, Kwan-Yuhl ; Kim, Hag-Wone ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 556~564
DOI : 10.6113/TKPE.2013.18.6.556
This paper proposes an initial rotor position detecting algorithm of a PM synchronous motor using an incremental encoder. The proposed algorithm estimates the phase offset between the rotor magnetic flux and the Z-pulse of the incremental encoder by applying six aligning mode current control. The absolute rotor position for driving a PM synchronous motor is calculated by using the phase offset of the Z pulse and A, B pulse signals of the encoder. The PMSM drives based on the estimated rotor position is applied to the elevator door system. The door length is measured on line at first setup of the elevator. The speed control for open, close, and reopen of the elevator door is also presented and the proposed algorithm for the elevator door system is verified by experiment.
Sensorless Speed Control for PMSM Using an Improved Full-Order Flux Observer
Lee, Kyoung-Gu ; Lee, June-Seok ; Lee, Kyo-Beum ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 565~572
DOI : 10.6113/TKPE.2013.18.6.565
The sensorless speed control using the improved full-order flux observer for PMSM is proposed in this paper. A conventional full-order flux observer has a drawback that the estimated flux of this observer contains the ripple component at the low speed range due to the increased gains of the convectional full-order flux observer. The improved full-order flux observer with the modified gains guarantee the improved estimation performance without ripple component at the from zero to high speed range. To identify the performance of proposed observer, the simulation and experiment are conducted and this performance is compared with the conventional full-order observer.
A Study on Feedforward Compensation Method of IPMSM for EV with Non-sinusoidal BEMF
Park, Gui-Yeo ; Park, Jung-Woo ; Ahn, Won-Il ; Shin, Duck-Woong ; Jeong, Moon-Seon ; Moon, Chae-Joo ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 573~578
DOI : 10.6113/TKPE.2013.18.6.573
In the case of the Back EMF voltage contains the harmonics, the motor torque ripple and vibration is occurred by the current pulsation, because IPMSM control algorithm is the model which is assumed that it contains a sinusoidal Back EMF voltage. To improve ride quality, in the case of IPMSM for EV, improving the torque control characteristics is necessary. Therefore, there is a need to minimize the influence of the harmonics. In this paper, the investigation to decrease the current distortion factor has been performed for improving torque control characteristics by applying the non-sinusoidal Back EMF to IPMSM model.
A Seamless Mode Transfer Scheme for Single Phase Inverter with ESSs
Byen, Byeng-Joo ; Seo, Hyun-Uk ; Cho, Younghoon ; Choe, Gyu-Ha ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 579~586
DOI : 10.6113/TKPE.2013.18.6.579
This paper proposes a mode transition algorithm between the grid-tied and the stand-alone operations for the single-phase inverter with the energy storage system. For the grid-tied operation, the dc-link voltage and the output current are required to be control. For the stand-alone mode, both the output voltage and the output current should be regulated. In order to mitigate a falling-off in control performance during transients in mode change, the load power estimation and the current selection schemes are proposed. The proposed method allows an optimized current reference is selected to reduce an output voltage drop and an excessive over-current in transient. To verify the effectiveness of the proposed method, both the simulation and the experiments for a 3kW single-phase inverter with the energy storage system have been conducted. From the results, it has been confirmed that the proposed method reduces a transient error as well as implementing smooth mode transition.
Performance Improvement of Sensorless Control of IPMSM using Active Flux Concept by Improved Current Estimators
Lee, Sung-Joon ; Kim, Tae-Wan ; Kim, Won-Seok ; Kim, Marn-Go ; Jung, Young-Seok ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 587~592
DOI : 10.6113/TKPE.2013.18.6.587
In this paper, the performance improvement of the sensorless control of IPMSM employing the active flux concept by the improved current estimator is presented. The accuracy of the current estimator used in a previous report is degraded when the motor parameters are not known exactly. A simple current estimator derived from estimated flux is proposed to improve the position estimation performance. In order to show the usefulness of the proposed estimation method, the simulation results using Matlab/Simulink and the experiment results are presented.
A Study on Asymmetric Pulsed DC Plasma Power Supply with Energy Recovery Circuit
Choo, Dae-Hyeok ; Yoo, Sung-Hwan ; Kim, Joohn-Sheok ; Han, Ki-Joon ;
The Transactions of the Korean Institute of Power Electronics, volume 18, issue 6, 2013, Pages 593~600
DOI : 10.6113/TKPE.2013.18.6.593
The asymmetric pulsed DC reactive magnetron sputtering system is widely used for the high quality plasma sputtering process such as a thin film deposition. In asymmetric pulsed DC power supply a reverse voltage is applied to the target periodically to minimize arc discharging effect. When sputtering in the mid-frequency range (20-350 kHz), the periodic target voltage reversals suppress arc formation at the target and provide long-term process stability. Thus, high quality, defect-free coatings of these materials can now be deposited at competitive rates. In this paper, a new style asymmetric pulsed DC power supply including mid-transformer is presented. In the proposed, an energy recovery circuit is adopted to reduce the mutual inductance of the transformer. As a result, the system dynamics of the voltage control loop is increased highly and the non-linear voltage boosting effect of the conventional system is removed. This work was proved through simulation and laboratory based experimental study.