A5101908533- Wireless Power Transfer Systems
- Energy Harvesting in Wireless Networks
- Aerospace and Aviation Technology
- Adaptive Control of Nonlinear Systems
- Aerospace Engineering and Control Systems
- Innovative Energy Harvesting Technologies
- Inertial Sensor and Navigation
- RFID technology advancements
- Wireless Body Area Networks
- Advanced Battery Technologies Research
- Micro and Nano Robotics
- Guidance and Control Systems
- Robotic Path Planning Algorithms
- Robotics and Sensor-Based Localization
- Underwater Vehicles and Communication Systems
- Control Systems and Identification
- Transportation Planning and Optimization
- Internet of Things and Social Network Interactions
- Fault Detection and Control Systems
- Air Traffic Management and Optimization
- 3D IC and TSV technologies
- Neural Networks and Applications
- Advanced MEMS and NEMS Technologies
- Traffic Prediction and Management Techniques
- Magnetic Bearings and Levitation Dynamics
Samsung (South Korea)
2022-2025
Kootenay Association for Science & Technology
2024
Korea Advanced Institute of Science and Technology
2018-2024
Green Technology Center
2018-2021
Chung-Ang University
2021
Korea Aerospace Research Institute
2007-2018
University of Suwon
2018
Sejong University
2004
The characteristics of dark signals have been investigated in the CMOS active pixel sensor (APS) with test structures fabricated using deep-submicron technology. It is found that periphery photodiode (PD) dominant source currents our structure, and this factor very sensitive to distance between sidewall shallow trench isolation n-type region PD. from transfer gate can be effectively reduced by tail p/sup +/ on surface gate, those floating diffusion (FD) node were estimated negligible normal...
A major challenge for practical magnetic energy harvesting (MEH) applications is achieving stable harvested power with high density under a wide range of temperature variation. The amount from the MEH sensitive to ambient because characteristics material are greatly affected by temperature. From point view, previous studies have limitations they do not consider thermal effects at all. In this paper, novel control algorithm form maximum in proposed considering dynamic changes first time....
This article proposes a method of extracting the coupling coefficient and resonant frequency receiving (Rx) side wireless power transfer system with an <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCC</i> -series topology, using only information from transmitting (Tx) side. The proposed has three modes, which allow Tx coil Rx inductance to be extracted, respectively. can calculated while considering tolerance coils. senses current, is...
This article proposes transmitter coils selection method for maximum power transfer efficiency in the wireless (WPT) system with multiple and a single receiver coil (MTSR). The proposed is divided into two main steps. First, criteria that can achieve are derived by analyzing relative magnitude of coupling coefficient between each coil. Next, calculating coefficients used only input current value presented. differs from previous studies it be applied when some transmission deactivated....
Recently, maintenance applications around power lines have been actively studied. These usually supply through magnetic energy harvesting(MEH) to devices the line. A major challenge for practical MEH is overcome saturation, which can cause degradation of density under a wide current range in In this paper, we propose design methodology harvest maximized output by considering saturation effect. To consider model and saturable magnetizing inductance based on were comprehensively analyzed....
In the wireless power transfer (WPT) system, input impedance characteristics change depending on load and air gap between coils. Changes in affect zero-voltage switching (ZVS) dead time related to stability, efficiency, electromagnetic interference. Existing studies lack dead-time analysis according operating conditions. addition, this resulted unnecessary dissipation as it cannot determine an appropriate compensation capacitance. Thus, is important analyze capacitance accordingly for ZVS....
In this article, a microrobot capable of creating propulsion force and receiving electrical energy using wireless power transfer (WPT) system is proposed. As source rotation for the microrobot, we use torque magnetic material in time-variant field generated by transmitting coil WPT system, with specifically designed which produced even greater under same volume. While based on Lorentz closely related to magnitude induced current, because proposed design independent it more practical...
Wireless power transfer (WPT) technologies are currently growing in popularity because of problems with batteries portable devices, such as the added weight and inconvenience conventional wired charging methods. However, wireless systems generate leakage magnetic fields, causing malfunctions adjacent electronic devices. Technologies to suppress electromagnetic interference (EMI) from WPT required prevent this problem. In paper, we propose a topology design for multiresonance reactive shield...
Recently, magnetic energy harvesting technologies have been studied actively for self-sustainable operation of applications around power line. However, lines has the problem saturation, which can cause performance degradation harvester. In this paper, optimal design a toroidal core harvesters proposed with consideration saturation near lines. Using Permeability-H curve and Ampere’s circuital law, optimum dimensional parameters needed to generate induced voltage were analyzed via calculation...
The aircraft autopilot needs the feedback of airflow angles, that is, angle-of attack and sideslip angle to control aircraft. angles measured by a mechanical vane are not accurate very noisy for low airspeed. Moreover, has failure risk. This paper describes extended Kalman filter based method estimate three-dimensional wind speed under constant condition. In addition, it can correct scaling error airspeed an It uses measurements, condition computed from GPS/INS navigation data stability...
This paper analyzes how over-coupled coils affect odd harmonic current and electromagnetic interference (EMI) in a wireless power transfer (WPT) system, proposes design considerations for series inductors to solve the EMI problem. When air gap of WPT system decreases below certain level are over-coupled, component input impedance currents increase. The increase components quickly aggravates issues. To problem additional were applied designing analyzed. inductors, efficiency, maximum...
Unmanned aerial vehicles (UAVs) using communications, sensors, and navigation equipment will play a key role in future warfare. Currently, UAVs are monitored to prevent misfire accidents, the conventional method adopted uses wires for data transmission power supply. The repeated connection disconnection of cables increases maintenance time harms connector. For convenience stability, wireless transfer system is needed. Unlike other (WPT) applications, size receiving coils must be small, so...
Nowadays., the demand in wireless power transfer (WPT) technology has increased due to battery problems of portable devices such as heavy weight and inconvenience charging devices. However., radiate magnetic field which high chance cause malfunction electric Therefore, interest research about suppression radiated EMI are increased. The planar resonant reactive shield employs coil for transfer, closed loop capacitor reduce EMI. dramatically reduces from WPT system. shielding performance is...
For charging the battery of underwater applications, many researches on inductive power transfer (IPT) in conductive medium have been conducted. The are mainly focused analysis eddy current loss (ECL). In this paper, Z-parameters method is used to analyze characteristics coil impedance, efficiency and ECL by considering conductivity operating frequency. reflects as an additional resistive component coils, which very useful for system design process.
The Smart UAV is the tilt rotor type of unmanned aerial vehicle that has been developed by KARI since 2002. According to characteristics aircraft, it a flight envelope VTOL(vertical take-off and landing) high cruise speed. Because conversion between helicopter airplane mode required, actuator system control surfaces 12 actuators 5 controllers for nacelle as well flaperon, elevator rotor. Based on Fly-By-Wire system, all except are an electric linear with dual motors RVDT sensors. Actuators...
This paper proposed EMI reduction method for over-coupled wireless power transfer (WPT) system using seriesnone (SN) topology. The series-none topology does not has the compensation capacitor minimizing reactive of receiver side. higher input impedance than conventional series-series (SS) topology, resulting in odd harmonic components current SN lower that SS In addition, when over-coupling phenomena occurs, there is much difference efficiency transferring compared to verified through 3D EM...