• Journal of Aerospace System Engineering
• /
• v.15 no.1
• /
• pp.32-39
• /
• 2021

Electric propulsion aircraft are being actively researched in the aviation field in recent years to solve environmental and noise problems caused by existing gas turbine engine. In particular, research on a thrust motor as a core component of an electric power propulsion system and an inverter for driving it is actively being conducted. In this paper, a motor with high specific power is selected to determine characteristics of aircraft that are sensitive to weight and volume. Power loss of the inverter is then simulated. In the simulation, the selected motor and power device were modeled using PSIM, a power electronics analysis tool. Inverter power loss according to switching frequency was then analyzed.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.6 no.3
• /
• pp.278-284
• /
• 2005

In this paper, phase controlled series resonant converter (PCSRC) system for power supply of communication station is suggested. PCSRC system is robust to load variations because it is POSR (parallel output series resonant) type. And it provides stable output voltage by changing phase of MOSFET switches to input voltage variations. Firstly, operation analysis about suggested series resonant converter system was carried. Then simulations using PSIM and experiments to actual system were carried to prove characteristics of suggested system.

• Proceedings of the KIPE Conference
• /
• 2011.07a
• /
• pp.404-405
• /
• 2011

본 논문에서는 SEMI F47을 만족하며 3상 계통에 적용 가능한 전압 새그 보상기를 구성하는 알고리즘과 설계과정을 기술하였다. 제안된 알고리즘을 검증하기 위해 PSIM 시뮬레이션 프로그램을 통해 시뮬레이션 하였고, 시제품 제작을 통해 성능을 검증 하였다.

• Aerospace Engineering and Technology
• /
• v.1 no.2
• /
• pp.149-154
• /
• 2002

The International Space Station (ISS) is being jointly developed by the following 16 international partners: The United States, Russia, Japan, Canada, Brazil, and the 11 member states of the European Space Agency. Assembly of ISS is a large-scale international program which commenced in November 1998, and is expected to conclude in 2006. Korea Aerospace Research Institute (KARI) is making effort to take part in the development of Payload Support & Interface Module (PSIM) for ISS. When success is achieved with ISS PSIM development project, Korea will have the rights to utilize external attached payload sites and research activities on ISS. Therefore preparation for the utilization of ISS EXPRESS pallet, JEM-EF, and Columbus-EPF need to be made. This paper shows the investigation results of the external attached payload sites for ISS and the application field of space and Earth science.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.10 no.3
• /
• pp.219-225
• /
• 2005

In this paper, a new discrete-time small signal model of an average current mode control is proposed to predict the inductor current responses. Compared to the peak current mode control, the analysis of the average current mode control is difficult because of its presence of an compensation network. By utilizing sampler model, a new discrete-time small signal model is derived and used to predict the behaviors of an inductor current of average current mode control employing generalized compensation networks. In order to show the usefulness of the proposed model, prediction results of the proposed model are compared to those of the circuit level simulator, PSIM and experiment.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.19 no.2
• /
• pp.124-130
• /
• 2005

This paper presents the simulation modeling and analysis of variable wind speed turbine system(VWTS) using Psim program In the simulation, using the Vestas V47 VWTS located in Hangwon wind farm in Jeju-Do as a model, wind model, blade model, pitch control model and grided connected generator are modeled. The VWTS is controlled by the optimal pitch angle for maximum output power under the rated wind speed and for the rated output power over the rated wind speed. To verify the effectiveness of proposed method, simulation results are compared with the actual data from the model system According to the comparison of these results, this method shows excellent performance. So it is very useful for understanding and applications of wind power control system.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.10 no.4
• /
• pp.347-355
• /
• 2005

In this paper, a new continuous~time small signal model of an average current mode control is proposed. Sampling effect Is considered to obtain the proposed small signal model. By the proposed model, the high frequency response characteristics of current loop gain might be predicted accurately compared to previous models. And this leads the prediction of inductor current response of the proposed model to be accurate compared to others. In order to show the usefulness of the proposed model, prediction results of the proposed model are compared to those of the circuit level simulator, PSIM and experiment.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.15 no.5
• /
• pp.923-930
• /
• 2020

In modern society, various DC power supplies are required to operate the system circuits of various electric devices. A stable DC supply is essential for the normal operation of the circuit and the importance of the converter for this is very high. This study proposed a PWM DC-DC converter circuit that applied a 3-pole 2-zero voltage controller to a KY converter, a step-up DC-DC converter, to maintain a stable supply of output voltage regardless of load fluctuations. In order to prove the normal operation characteristics of the proposed converter circuit, a PSIM simulation and a circuit operation experiment on the PCB board were performed in comparison with the conventional converter circuit.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.23 no.1
• /
• pp.116-124
• /
• 2009

This paper proposes a new Artificial-Intelligent(AI) Power Quality(PQ) diagnosis algorithm using Discrete Wavelet Transform(DWT), Fast Fourier Transform(FFT), Root-Mean-Square(RMS) value. The developed algorithm is able to detect and classify the PQ problems such as the transient, the voltage sag, the voltage swell, the voltage interruption and the total harmonics distortion. The 15.36[kHz] sampling frequency is used to measure the voltages in a power system. The measured signals are used for DWT, FFT, RMS calculation. For AI diagnosis of the PQ problems, a simple multi-layered Artificial Neural Network(ANN) with the back-propagation algorithm is adopted, programmed in C++ and tested in PSIM simulation studies. Finally, the algorithm, which is installed in MP PQ+256 with TI DSP320C6713, is proved to diagnose the PQ problems efficiently.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.21 no.3
• /
• pp.137-142
• /
• 2021

In recent years, permanent magnets such as IPM (Interior Permanent Magnet) motors or SPM (Surface Permanent Magnet) motors that can obtain high efficiency and power density by inserting rare earth permanent magnets into the rotor are used. Research on the used electric motor is being actively conducted. Since it uses a permanent magnet, it has the advantage of high efficiency and high power density compared to reluctance motors and induction motors, but by inserting a permanent magnet into the rotor, it operates at high speeds and decreases reliability due to demagnetization of the permanent magnets, and increases the cost of rare earth metals. In this paper, in accordance with the development of future technology that can replace rare-earth permanent magnet motors and technological preoccupation of rare-earth reduction type motors and de-rare-earth motors, switched reluctance motors that do not require permanent magnets (Switched Reluvtance Motors) Motor, SRM) to drive driving control. Using the 3-phase SRM library provided by the PSIM simulation program, we will study the driving and control system modeling of SRM using the rotor position information sensor.