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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 15, Issue 6 - Dec 2010
Volume 15, Issue 5 - Oct 2010
Volume 15, Issue 4 - Aug 2010
Volume 15, Issue 3 - Jun 2010
Volume 15, Issue 2 - Apr 2010
Volume 15, Issue 1 - Feb 2010
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Robust Speed Control of a Permanent Magnet Synchronous Motor using a Fuzzy Logic Controller
Choi, Young-Sik ; Yu, Dong-Young ; Jung, Jin-Woo ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 343~351
DOI : 10.6113/TKPE.2010.15.5.343
This paper proposes a new fuzzy speed controller based on the Takagi-Sugeno fuzzy method to achieve a robust speed control of a permanent magnet synchronous motor (PMSM). The proposed controller requires the information of the load torque, so the second-order load torque observer is used to estimate it. The LMI condition is derived for the existence of the proposed fuzzy speed controller, and the gains of the controller are provided. It is proven that the augmented control system including the fuzzy speed controller and the load torque observer is exponentially stable. To evaluate the performance of the proposed fuzzy speed controller, the simulation and experimental results are presented under motor parameter variations. Finally, it is clearly verified that the proposed control method can accurately control the speed of a permanent magnet synchronous motor.
Performance Improvement of an Automatic Door System Using a Disturbance Observer
Yoo, Young-Dong ; Lee, Kyo-Beum ; Hong, Suk-Kyo ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 352~360
DOI : 10.6113/TKPE.2010.15.5.352
This paper proposes a precise position control of an automatic door using a disturbance observer. Although the conventional PID controller is usually used for an automatic door system, the demand of the robust controller considering the parameter deviations and disturbances is increasing due to the various size and weight of a door. The linear model for an automatic door system is presented. Based on this model, the LQR controller using a state feedback controller and an observer are suggested. A disturbance observer to compensate the undesirable factors is also proposed. Simulation and Experimental results are presented to illustrate the feasibility of the proposed control strategy.
Position Control of Stepping Motor using Torque Angle Control Scheme
Lee, Dong-Hee ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 361~368
DOI : 10.6113/TKPE.2010.15.5.361
This paper presents high speed position controller using stepping motor. The proposed position controller has close loop and open loop mode. In the high speed region, torque angle which is controlled by PI controller and memory based look-up table, is used to keep the reference position. The memory based look-up table produces a torque angle according to motor speed, and the PI controller can compensate the torque angle error. So, the fast dynamic response can be expected in the same position error. The open loop control mode which is divided by 3-modes control the actual position in the low speed and small position error. Each open loop modes are designed to reduce position error and dynamic brake in the stop command. The proposed position control scheme is verified by the practical stepping motor.
Design and Implementation of 3.3 kW On-Board Battery Charger for Electric Vehicles
Kim, Jong-Soo ; Choe, Gyu-Yeong ; Jung, Hye-Man ; Lee, Byoung-Kuk ; Cho, Young-Jin ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 369~375
DOI : 10.6113/TKPE.2010.15.5.369
This paper presents a design and implementation of 3.3 kW on-board battery charger for electric vehicles or plug-in hybrid electric vehicles. Considering characteristics of the electric vehicles, a series-loaded resonant dc-dc converter and frequency control scheme are adopted to improve efficiency and reliability, and to reduce volume and cost. The developed on-board battery charger is designed and implemented by using high frequency of 80-130 kHz and zero voltage switching method. The experimental result indicates 92.5% of the maximum efficiency, 5.84 liters in volume, and 5.8kg in weight through optimal hardware design.
Multilevel Inverter using Two 5-level Inverters Connected in Series
Choi, Won-Kyun ; Kwon, Cheol-Soon ; Hong, Un-Taek ; Kang, Feel-Soon ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 376~380
DOI : 10.6113/TKPE.2010.15.5.376
This paper presents a circuit configuration of multilevel inverter to increase the number of output voltage levels by using conventional 5-level inverters connected in series. Most of all it can maximize the number of output voltage levels by employing input voltage sources, which have the power of five. When it synthesizes the same number of output voltage levels, the proposed inverter can save the number of switching devices compared with the conventional cascaded H-bridge cell inverter. So it can reduce the size, cost, power consumption of the system. We implemented computer-aided simulation and experiments for a 25-level inverter employing two 5-level inverters.
Development of a Non-contact Type Magnetic Signal Monitoring Equipment for Automotive Electric Devices
Yang, Hyong-Yeol ; Yang, Seung-Hak ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 381~386
DOI : 10.6113/TKPE.2010.15.5.381
A non-contact type magnetic signal monitoring equipment for automotive electric devices is proposed in this paper. There are many kinds of actuators in the car like solenoid, relay, motor, injector, etc which are operated by magnetic energy. It is difficult to find out whether the actuators operate well or not because the terminals of the actuators are combined to the connectors. In this paper a non-contact type magnetic signal monitoring equipment using Hall effect sensor is proposed to measure the magnetic signal of the actuators very easily to find out the actuators' operating status. The simulation and experimental results show that the developed equipment is very useful and has good performance.
Compensation of Temperature Characteristics for Capacitance Estimation of DC-link Capacitors
Pu, Xingsi ; Kim, Kyung-Hyun ; Lee, Dong-Choon ; Lee, Kyo-Beum ; Kim, Jang-Mok ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 387~393
DOI : 10.6113/TKPE.2010.15.5.387
This paper proposes a correction method of capacitance estimation considering the temperature effect for the DC-link capacitor banks in three-phase AC/DC/AC PWM converters. At first, operating temperature of the capacitors is detected and capacitance variation is corrected due to the temperature effect. Thermisters are used for sensing the temperature and voltage variation across the thermister is exploited to identify the capacitance change. The validity of the proposed method has been verified by experimental results.
Electronic Ballast Design Driven by Low Frequency Square Wave for High Power MHL
Kim, Ki-Nam ; Park, Jong-Yun ; Choi, Young-Min ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 394~400
DOI : 10.6113/TKPE.2010.15.5.394
In this paper, We proposed electronic ballast that applys Buck Converter operation principle to Full-Bridge inverter. The proposed ballast consists of an EMI Filter, a full-bridge rectifier, a passive power factor correction (PFC) circuit and a full-bridge inverter. The passive PFC is used and a Full-Bridge inverter operation by two frequency. High Side and Low Side switch was driven by high frequency and low frequency and realized buck Converter's operation. The lamp is driven by Low Frequency square wave to avoid Acoustic Resonance. Also, bulk of inductor is reduced by high frequency switching. Performance of the proposed ballast was validated through computer simulation using Pspice, experimentation and by applying it to an electronic ballast for a prototype 700W MHL.
Safety Improvement of an Automatic Door System Using a Disturbance Observer and Neural Network
Yoo, Young-Dong ; Lee, Kyo-Beum ; Hong, Suk-Kyo ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 401~410
DOI : 10.6113/TKPE.2010.15.5.401
This paper proposes an automatic door system which improves the safety of conventional automatic door systems by complementing the external safety sensors. Disturbance observer using the model of automatic door system and neural network is designed. The proposed algorithm compares the observed disturbance with the output of neural network. Experimental results are presented to illustrate the feasibility of the proposed control strategy. The proposed strategy is expected to improve the safety of an automatic door system.
Analysis of Voltage Drop Characteristics of Transformer-based 3-phase Voltage Disturbance Generator
Han, Heung-Soo ; Lee, Young-Ho ; Song, Woong-Hyub ; Nho, Eui-Cheol ; Kim, In-Dong ; Kim, Heung-Geun ; Chun, Tae-Won ;
The Transactions of the Korean Institute of Power Electronics, volume 15, issue 5, 2010, Pages 411~416
DOI : 10.6113/TKPE.2010.15.5.411
A voltage drop characteristics of a transformer-based voltage disturbance generator with series transformers is analysed. It is well known that a voltage disturbance generator with series transformer is cost-effective and reliable compared with other types. The voltage drop depends on the %Z of the transformer, power rating, and output power factor. A wrong design of the transformer results in a severe voltage drop, which can not guarantee the proper performance of the generator. The voltage drop is analysed under the condition of 10kVA output power rating and 4% of %Z with the variation of power factor. It is found through simulations and experiments that the drop increases as the power factor decreases in lagging mode, and the drop is 4% of the rated voltage in case of 0.85 lagging power factor.