A5101763663- Advanced Battery Technologies Research
- Electromagnetic Compatibility and Noise Suppression
- Advancements in Battery Materials
- Electrostatic Discharge in Electronics
- Analytical Chemistry and Sensors
- Fault Detection and Control Systems
- Electromagnetic Compatibility and Measurements
- Fuel Cells and Related Materials
- Engineering Applied Research
- 3D IC and TSV technologies
- Advanced Battery Materials and Technologies
- Semiconductor Lasers and Optical Devices
- Vehicle emissions and performance
- Subcritical and Supercritical Water Processes
- Advancements in Semiconductor Devices and Circuit Design
- IoT-based Smart Home Systems
- Lightning and Electromagnetic Phenomena
- Microwave Engineering and Waveguides
- Microwave and Dielectric Measurement Techniques
- Conducting polymers and applications
- Environmental Policies and Emissions
- Analog and Mixed-Signal Circuit Design
- Semiconductor materials and devices
- Petroleum Processing and Analysis
- Phase Equilibria and Thermodynamics
Mando Corporation (South Korea)
2023
Halla University
2022
Technische Universität Berlin
2020-2022
Seoul National University
2017
Kangnam University
2016
Sungkyunkwan University
2013-2015
Lithium-ion battery cells not only show different behaviors depending on degradation and charging states, but also overcharge overdischarge of shorten life cause safety problems, thus studies aiming to provide an accurate state a cell are required. Measurements impedance used for SoH SoC estimation techniques, it generally takes long time in each be prepared voltage response is measured when discharging under condition. This study introduces electrical equivalent circuit model lithium-ion...
In this paper, a method for monitoring SoC of lithium-ion battery cell through continuous impedance measurement during operation is introduced. A multi-sine signal applied to the operating current, and SoH can be simultaneously monitored via at each frequency. Unlike existing studies in which performed ex situ EIS equipment, state estimation situ. The measured takes into account temperature SoH, enabling accurate estimation. system configured experiment considerations selection parameters...
An imbalance difference model has been developed to estimate the common-mode radiated emission of a PCB with an attached cable. This model, however, requires significant computation time for full-wave simulation, especially if cable is long, even powerful computer configuration. To solve this problem, method that approximates as equivalent asymmetrical dipole antenna proposed in paper. The can be predicted using line integration current distribution which directly estimated by model. Unlike...
This paper proposes an accurate approach for predicting transferred power from a noise source to integrated circuits based on the characteristics of transfer network. A delivery trace package and printed circuit board are designed transmit external circuits. The is demonstrated between injection terminal edge circuits, function distribution network derived. two-tier calibration applied test, scattering parameters measured calculation function. After testing obtain indispensable parameters,...
This paper deals with a method to detect the existence of an over-discharged cell in lithium-ion battery (LIB) pack by measuring total harmonic distortion (THD) rate voltage response. Over-discharge LIB reduces available capacity irreversible chemical reactions, resulting serious safety risks such as explosions. Even if only one exists pack, it accelerates decomposition other cells. In general, measurement each is required cell. because measured, cannot be distinguished whether uniformly low...
During PEMFC(Proton Exchange Membrane Fuel Cell) operation monitoring and diagnosis are important issues for reliability durability. Stack defect can be followed by a critical cell voltage drop in the stack. One method is CVM(Cell Voltage Monitoring), where all cells stack electrically connected to measuring system monitored these voltages. The other methods based on EIS(Electrochemical Impedance Spectroscopy) nonlinear frequency response. In this paper, intermodulation(IM) PEMFC introduced....
A de-embedding method for multiport networks, especially coupled odd interconnection lines, is presented in this paper. This does not require a conversion from S-parameters to T-parameters, which widely used the technique of networks based on cascaded simple two-port relations, whereas here, we apply an operation S-matrix generate all uncoupled and coefficients. The derivation relations incident reflected waves between input entire network intrinsic device under test (DUT). characteristics...
The differential mode (DM) and common (CM) in the generalized four-conductor lines are analysed with current division factors. Novel extended mixed-mode S-parameters, which cross-mode S-parameters not exist, is proposed based on independent analysis. In addition, a new conversion between standard also presented matrices contain validity of verified by simulations.
삽입 손실은 EMI 필터의 노이즈 제거 성능을 나타내는 주된 지표로 쓰인다. 본 논문에서는 기존의 방법보다 좀 더 정확하고 편하게 손실을 측정할 수 있는 방법에 대하여 연구하였다. 이와 관련하여 비이상적인 특성들을 모두 고려하기 위해 4포트 S-파라메터 측정을 통한 임의의 전원/부하 임피던스에 대한 차동 모드와 공통 모드의 구하는 제시하였다. 이를 활용하여 필터가 사용될 회로의 임피던스를 알고 있을 때, 시스템에 적용된 모드 손실과 손실를 구할 있다. 또한, 바탕으로 적절한 소자 값을 선택하기 혼합 변환, 체인 변환 그리고 모델링을 통하여 값에 따른 전체 시스템의 예측하는 Insertion loss is used as the character to express efficiency of filter. In this paper, we studied better method that can measure insertion filter exactly than original...
본 논문에서는 4-포트 수평/수직 프로브 스테이션을 사용하여 수직 커넥터 핀의 특성 측정 시 사용되는 회로망 분석기의 교정용 키트(calibration kit)를 제안한다. 기존의 수평면에서 교정키트를 사용하면, 교정 후 암의 변경 및 추가적인 장치가 필요하며, 이로 인한 시간 소요뿐 아니라, 주변 상황에 민감한 팁의 위치 변동에 기인한 정밀도 훼손의 위험이 있다. 이를 보완할 수 있는 겸용 제시한다. 교정은 SOLT 방법을 이용하였으며, Short, Open, Load는 교정하며, Thru는 프로브의 위치에 따라서 교정기판의 같은 교정하거나 또는 위쪽, 아래쪽을 수직으로 연결하여 사용할 있도록 설계/제작하였다. 즉, 기판에 수직한 Thru를 교정할 때에는 세워 키트 양면을 제안하였다. 제안한 교정키트에서의 회로 반사/전달 특성을 기존 교정키트의 회로의 특성과 비교 분석하였으며, 두 전달 특성은 길이 보정 후, 300 kHz부터 8.5 GHz까지 약...
This paper presents a cost-effective hybrid low drop-out regulator (LDO) circuitry for state-of-the-art DDR DRAM cores that not only supports various refresh operations, but also meets the JEDEC specification of period by improving load-transient response. In order to guarantee stable output voltage achieving precise off-control operation, load replication circuit with dummy cells is exploited. The proposed LDO has been implemented and fabricated in standard 180nm CMOS technology occupies...