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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 16, Issue 6 - Dec 2011
Volume 16, Issue 5 - Oct 2011
Volume 16, Issue 4 - Aug 2011
Volume 16, Issue 3 - Jun 2011
Volume 16, Issue 2 - Apr 2011
Volume 16, Issue 1 - Feb 2011
Selecting the target year
A Study on Development of Disaster Prevention Automation System on IT using One-chip Type PLC
Kwak, Dong-Kurl ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 97~104
DOI : 10.6113/TKPE.2011.16.2.97
This paper deals with the quick and precise disaster prevention automation system (DPAS) based on information communication technology (IT) that detects fire and disasters in the building automatically and quickly and then activates the facilities to extinguish fire and disasters, monitoring such situation in a real time through wire-wireless communication network. The proposed DPAS is applied a programmable logic controller (PLC) of one-chip type which is smallsize and lightweight and also has highly sensitive-precise reliabilities. The one-chip type PLC analyzes detected signals from sensors in a case of fire and disasters, then activates fire extinguishing facilities for rapid suppression. The detected data is also transferred to a remote situation room through wire-wireless network of RS232c and bluetooth communication. The transferred data sounds an emergency alarm signal, and operates a monitoring program. The proposed DPAS based on IT will minimize the life and wealth loss from rapid measures while prevents fire and disasters.
Study On Photovoltaic Module Integrated Converter based on Active Clamp Current-fed Half-Bridge Converter
Jung, Hoon-Young ; Park, Jeong-Kyu ; Ji, Young-Hyok ; Won, Chung-Yuen ; Lee, Tae-Won ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 105~113
DOI : 10.6113/TKPE.2011.16.2.105
In this paper, photovoltaic module integrated converter (MIC) based on active clamp current-fed half-bridge converter is proposed. The converter stage operates in zero-voltage condition using active clamp technique. The theoretical study and circuit design for proposed inverter are confirmed with PSIM simulator and experimental reusult.
High Step-up Interleaved CCM-ZVZCS Converters
Park, Yo-Han ; Choi, Se-Wan ; Choi, Woo-Jin ; Lee, Kyo-Beum ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 114~121
DOI : 10.6113/TKPE.2011.16.2.114
This paper proposes a soft-switching interleaved boost converter which is suitable for high step-up and high power applications. Compared to the conventional boost converter the proposed converter can achieve approximately doubled voltage gain using the same duty cycle. The voltage ratings of the switch and diode are reduced to half, which result in the use of devices with lower
and on drop leading to reduced conduction losses. Also, voltage ratings of the passive components are reduced, and therefore the total energy volume is reduced to half. Further, the switch is turned on with ZVS in the CCM operation, and the diode is turned off with ZCS which results in negligible surge caused by diode reverse recovery leading to reduced switching losses. The validity of the proposed converter is proved through a 2kW prototype.
Power Factor Correction Circuit with a Soft-switched Boost Scheme
Lee, Hyo-Jae ; Choi, Hyun-Chil ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 122~129
DOI : 10.6113/TKPE.2011.16.2.122
In this paper, a new power factor correction circuit(PFC) based on a soft-switched boost scheme is proposed. Except for some soft-switching transition intervals, it operates exactly like the conventional boost scheme. Thus the desirable features of both high efficiency and easy control can be obtained. The design guidelines are suggested to achieve high efficiency. To verify the superior performance of the proposed circuit, experiment and simulation is carried out.
The Control Method of In-Wheel PMSM for Electric Scooter using Speed Observer
Son, Tae-Sik ; Lee, Yong-Kyun ; Kim, Hag-Wone ; Cho, Kwan-Yuhl ; Mok, Hyung-Soo ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 130~136
DOI : 10.6113/TKPE.2011.16.2.130
This paper presents the torque control algorithm of a permanent magnet synchronous motor(PMSM) for an electric scooter. The volume of the in-wheel type motor is restricted due to the complicated mechanical structure in wheel of an electric scooter, so the hall sensors instead of resolver and encoder for the rotor position sensors are installed. In this paper, the rotor speed and position are estimated from the speed estimator for vector control of a PMSM with hall sensors. The motor starts to rotate at standstill in BLDC mode with 120 degree conduction. After start up, the operating mode is changed to the vector control with maximum torque per ampere(MTPA) operation at low speeds and flux weakening control at high speeds. The performance of the proposed control algorithm is verified through the experiment in the electric scooter.
Circuit Model Based Analysis of a Wireless Energy Transfer System via Coupled Magnetic Resonances
Cheon, Sang-Hoon ; Kim, Yong-Hae ; Lee, Myung-Lae ; Kang, Seung-Youl ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 137~144
DOI : 10.6113/TKPE.2011.16.2.137
A Simple equivalent circuit model is developed for a wireless energy transfer system via coupled magnetic resonances and a practical design method is also provided. Node equations for the resonance system are built with the method, expanding on the equations for a transformer, and the optimum distances of coils in the system are derived analytically for optimum coupling coefficients for high transfer efficiency. In order to calculate the frequency characteristics for a lossy system, the equivalent model is established at an electric design automation tool. The model parameters of the actual system are extracted and the modeling results are compared with measurements. Through the developed model, it is seen that the system can transfer power over a mid-range of a few meters and impedance matching is important to achieve high efficiency. This developed model can be used for a design and prediction on the similar systems such as increasing the number of receiving coils and receiving modules, etc.
Modeling and Analysis of Modified Active Frequency Drift Method
An, Jin-Ung ; Yu, Gwon-Jong ; Choy, Ich ; Choi, Ju-Yeop ; Lee, Ki-Ok ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 145~151
DOI : 10.6113/TKPE.2011.16.2.145
In this paper, among the active islanding detection techniques, the modified active frequency drift method was analyzed, which is relatively easy to apply to the single-phase grid-connected PV PCS. The existing designs for turbulences in these applications were empirically conducted, and do not have sufficient reliability and performance. Therefore, three application forms of the modified active frequency drift technique were modeled, based on which the proper magnitude of turbulence, which is the frequency acceleration component, was calculated. Using the results, the magnitude of and injection method for turbulence for ensuring the islanding detection performance and improving the output power quality were proposed, and they were verified via simulations and experiment to prove that the reliable islanding detection technique can be developed merely by measuring the basic output power quality, without the need for expensive islanding simulation equipment.
Analysis of Flux Weakening Operating Regions for a PM Synchronous Motor in HEV by considering Back EMF Harmonics
Cho, Kwan-Yuhl ; Woo, Byung-Guk ; Kim, Gyoung-Man ; Kang, Chan-Ho ; Shin, Hee-Keun ; Yoon, Byung-Chul ; Park, Min-Gyu ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 152~161
DOI : 10.6113/TKPE.2011.16.2.152
An interior permanent magnet synchronous motor(IPMSM) has been applied to the electric vehicle due to its high efficiency, compact volume, and wide operating speed ranges. This paper presents the analysis of the flux weakening operating regions at high speeds for the IPMSM that has back emf harmonics. The effect of the back emf harmonics on the motor speed and the maximum torque is analyzed. Also the dq currents for maximum torque operation under the voltage and the current limit conditions are analyzed. The conventional analysis and the presented analysis for the flux weakening operating regions are compared and the maximum torque - speeds characteristics for both analysis are verified through the experiment.
Model Based Control System Design of Two Wheeled Inverted Pendulum Robot
Ku, Dae-Kwan ; Ji, Jun-Keun ; Cha, Guee-Soo ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 162~172
DOI : 10.6113/TKPE.2011.16.2.162
This paper proposes embedded System of two wheeled inverted pendulum robot designed by model based design method, using MATLAB/SIMULINK and LEGO NXT Mindstorms. At first, stability and performance of controller is verified through modeling and simulation. After that direct conversion from simulation model to C code is carried and effectiveness of controller is experimentally verified. Two wheeled inverted pendulum robot has basic function about autonomous balancing control using principle of inverted pedulum and it is also possible to arrive at destination. In this paper, state feedback controller designed by quadratic optimal control method is used. And quadratic optimal control uses state feedback control gain K to minimize performance index function J. Because it is easy to find gain, this control method can be used in the controller of two wheeled inverted pendulum robot. This proposed robot system is experimentally verified with following performances - balancing control, disturbance rejection, remote control, line following and obstacle avoidance.
Development of PV/T for Performance Improvement of Photovoltaic System
Choi, Jung-Sik ; Ko, Jae-Sub ; Chung, Dong-Hwa ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 173~181
DOI : 10.6113/TKPE.2011.16.2.173
This paper proposes photovoltaic thermal hybrid module to get the electrical and thermal performance of building integrated photovoltaic(BIPV) system. BIPV system is decreased the system efficiency because output of PV is decreased by the thermal rising on generating. In order to improve the efficiency of BIPV module, water cooling system is applied and generated thermal is used the warm water system. Water cooling system uses the flux control algorithm considering water temperature and power loss. Electrical and thermal performance of proposed photovoltaic thermal hybrid module is confirmed through the actual experiment and herby proved the valid of this paper.
LVRT Control Strategy of Grid-connected Wind Power System
Shin, Ho-Joon ; Sul, Seung-Ki ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 182~190
DOI : 10.6113/TKPE.2011.16.2.182
This paper proposes a LVRT (Low Voltage Ride Through) control strategy which should be satisfied by grid-connected wind power system when grid faults occur. The LVRT regulation indicates rules or actions which have to be executed according to the voltage dip ratio and the fault duration. Especially the wind power system has to support the grid with specified reactive current to secure the grid stability when voltage reduction ratio is over 10%. The LVRT regulation in this paper is based on the German Grid Code and full-scale variable speed wind power conversion system is considered for LVRT control strategy. The proposed LVRT control strategy satisfies not only LVRT regulation but also makes power balance between wind turbine and power system through additional DC link voltage regulation algorithms. Because it is impossible to control grid side power when the 3-phase to ground fault occurs, the DC link voltage is controlled by a generator side inverter using the DC link voltage control strategy. Through the simulation and experiment result, the proposed LVRT control strategy is evaluated and its effectiveness is verified.
Fault Diagnosis Scheme for Open-Phase Fault of Permanent Magnet Synchronous Motor Drive using Extended Kalman Filter
Ahn, Sung-Guk ; Park, Byoung-Gun ; Kim, Rae-Young ; Hyun, Dong-Seok ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 191~198
DOI : 10.6113/TKPE.2011.16.2.191
In this paper, the fault diagnosis scheme for PMSM drives has been proposed to maintain control performance under a switch open-phase fault of inverter. When the open-phase fault occurs, the stator resistances of PMSM are estimated by Extended Kalman Filter (EKF) in real time and can appear differently according to the location of fault occurrence to check the fault detection and identification. The control algorithm is configured without the additional device and low cost by adding the existing control program. Also, by using motor parameter the estimated stator resistance value improves the control performance of the controller affected by parameter variation. The feasibility of the proposed fault diagnosis algorithm is validated in simulation and experiment.
Electrical Modeling of Lithium-Polymer Battery
Im, Jae-Kwan ; Lim, Deok-Young ; Windarko, Novie Ayub ; Choi, Jae-Ho ; Chung, Gyo-Bum ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 2, 2011, Pages 199~207
DOI : 10.6113/TKPE.2011.16.2.199
Electrical modeling of lithium-polymer battery is very important for electric energy supply system. In this paper, electric equivalent circuit of lithium-polymer battery is proposed to simulate its dynamic characteristics. Maccor 8500 charge/discharge system is used to obtain the experimental data of lithium-polymer battery. Model parameters are calculated by using Matlab. This paper defines a R-C model for charging/discharging of battery and polynomial functions are used for OCV (Open Circuit Voltage) modeling. The proposed model is simulated with PSiM and then compared the simulation results with the experimental results to verify the validity of the proposed model.