• The Transactions of the Korean Institute of Electrical Engineers P
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• v.65 no.2
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• pp.114-121
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• 2016

This paper is Instant space vector PWM(Pulse Width Modulation)power conversion devices in switching power semiconductors from my generation to losses and switching when the voltage surge and current surge of electronic noise(EMI: Electro Magnetic Interference / RFI: Radio Frequency Interference)to effectively minimize the power soft-switching power conversion circuit topologies of auxiliary resonant DC tank for the purpose of high performance realization of the electric power conversion system by the high-speed switching of a semiconductor device(AQRDCT simultaneously : an active auxiliary resonance using auxiliary Quasi-resonant DC tank)DC link snubber switch has adopted a three-phase voltage inverter. AQRDCL proposed in this paper can reduce the effective and current peak stress of the power semiconductors of the auxiliary resonant snubber circuit compared to the conventional active-resonant DC link snubber, it is not necessary to install the clamp switch of the auxiliary resonant DC link, DC the peak current and power loss of the bus line can be reduced.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.187-187
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• 2010

현대의 전기전자 기술의 발전속도가 급격히 빨라짐에 따라서 디지털 전자기기는 많은 데이터와 빠른 전송속도가 요구되어지고 있으며 이로 인해 예상치 못한 고주파 노이즈 신호의 문제가 심각해지고 있다. 최근 디지털 전자기기 중 디스플레이 표시장치에서 구동전압 인가 시 발생하는 근역장 방사노이즈가 문제가 되고 있고, 정전용량방식 (Capacitive Overlay)Touch Pannel에서 터치 시 오작동을 일으키는 EL 면광원의 EMI(Electro-Magnetic Interference, 전자방해)가 본 연구에서 해결하고자 하는 문제이다. EL 면광원의 구동전압이 증가함에 따라서 Touch Panel에 인가되는 근역장 방사노이즈의 세기를 측정하였고 근역장 방사노이즈를 감쇄할 수 있는 Flexible한 자성복합시트에 대해서 연구하였다. EL Display Pannel에 Flexible한 자성 복합시트를 채용하여 Flexible Display 장비의 근역장 방사노이즈 감쇄에 효과가 있음을 확인하였다.

• 정보화사회
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• s.108
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• pp.16-20
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• 1996

우리나라의 전자파장해검정제도는 국내의 전자파 환경보호를 위해 '89.12.30 법률 제 3686호로 전파법을 개정하고, 그 이듬해인 '90.9.3 전자파장해(EMI: Electro Magnetic Interference)기준과 장해검정의 대상기기.방법 및 절차 등을 규정한 전자파장해검정규칙을 체신부령 제825호로 제정하고, '90. 11월 모뎀 및 팩시밀리 등 9개의 유선통신단말기기에 대한 장해검정을 시작으로 최초 도입되었다.

• Journal of Aerospace System Engineering
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• v.17 no.5
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• pp.42-57
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• 2023

In this paper, to increase the research capability of flight missions and maintenance in operating military aircraft, we studied the requirements for additional mounting of flight video and data recorders and safety verification methods. The verification process of the recorder equipment itself, structural safety in the aircraft system, power and electrical safety, electromagnetic compatibility, and impact of airworthiness are described in accordance with military standards and operating environment requirements. In addition, through ground/flight tests, the results of functional operation suitable for the influence and demand of interference between the flight video and data recorder and other systems are also presented.

• Journal of the Institute of Electronics and Information Engineers
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• v.49 no.12
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• pp.277-284
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• 2012

In this paper, we analyzed various noise in the video stream system that have largely influence on EMI noise. We presented the remedy for these various noises and then designed the wireless video streaming system for a vehicle. To minimize EMI noise, we derived the improvement of noise characteristic from impedance matching, new design of the inner layer of the PCB line design and new design of high-speed data Interfaces. As a result, the final system showed 40[dBuV/m] and 47[dBuV/m] dB in the each regulation band.

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.2295-2297
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• 2003

The major problem encountered in satellite design is EMI (Electro-Magnetic Interference) and EMC (Electro-Magnetic Compatibility). Here, our focus is on the effects of protons on the electronic system. The SEU (Single Event Upset) results from the level change of stored information due to photon radiation and temperature in the space and the nuclear power plant environment. The impact of SEU on PLD (Programmable Logic Devices) technology is most apparent in ROM/SRAM/DRAM devices wherein the state of storage cell can be upset. In this paper, a simple and powerful test techniques is suggested, and the results are presented for the analysis and future reference. The test results are compared with that of JPL test report. In our experiment, the proton radiation facility available at KIRAMS (Korea Institute of Radiological Medical Sciences) has been applied on a commercially available SRAM manufactured by Hynix Semiconductor Company.

• Journal of the Korea Institute of Military Science and Technology
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• v.11 no.6
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• pp.74-80
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• 2008

Analysis of the electromagnetic environment on topside of a ship is needed for optimal arrangement of all kinds of antennas to be installed on the shipboard in order to minimize the probability of EMI of equipment and subsystems in real ship after construction phase. In this paper we analyze the characteristics of electric-fields such as radiation patterns and near E-fields of V/UHF antennas installed on a shipboard. We compare simulated results with measurements on the real ship for near E-fields to verify the reliability of the computed electromagnetic environment. Although there are various factors causing errors such as cable loss and impedance mismatching etc. when measuring near E-field, both data show similar trends in the range of the acceptable tolerance.

• The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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• v.7 no.2
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• pp.17-29
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• 1996

현대 산업사회에서의 자동차는 사회 및 경제활동에 있어서 없어서는 안되는 필수 불가결한 생활의 일부분으로 자리잡은지 이미 오래이며, 국내에서도 1987년 이후로 급격한 증가추세에 있다. 또 한 갈수록 발전되는 첨단 전자제품의 개발로 자동차도 초기의 기계적인 제어에서 현재는 많은 부분이 전자 제어화 되고 있는 실정이다. EMI(ElectroMagnetic Interference)의 측면에서 자동차는 점화장치가 가장 많은 불요전자파를 발생 하고 잇으나, 지난 수십 년간의 법규제(유럽 및 북미)등을 적용하여 이미 자동차 제작사들은 이를 고 려하여 개발, 평가를 하여 불요전자파의 발생을 줄이고 있다. 그러나, 계속되는 전자화 및 첨단 전자 제품의 개발에 따라 자동차에도 고성능의 전자소자 등을 적용하게 되었으며 이는 새로운 EMI 측면의 문제를 발생시켰으며 EMS(ElectroMagnetic Suseptibility) 측면에서는 자동차의 기능이 오작동하여 시스템의 기능 불이행, 수송수단의 손실, 심지어는 인명의 손실 등 위해가 심각한 문제로 대두되었다.

• International Journal of Aeronautical and Space Sciences
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• v.5 no.2
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• pp.28-34
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• 2004

One of the major problem encountered in nuclear plants and satellites design isEMI (Electro-Magnetic Interference) and EMC (Electro-Magnetic Compatibility).Here, our focus is to implement the test board for checking SEU (Single EventUpsets); the effects of protons on the electronic system. The SEU results from thelevel change of stored information due to photon radiation and temperature in thespace environment. The impact of SEU on PLD (Programmable Logic Devices)technology is most apparent in ROM/SRAM/DRAM devices wherein the state ofstorage cell can be upset. In this paper, a simple and powerful test techniques issuggested, and the results are presented for the analysis and future reference. In ourexperiment, the proton radiation facilitv (having the energy of 50 MeV with a beamcurrent of 60 uA of cyclotron) available at KIRAMS (Korea Institute of RadiologicalMedical Sciences) has been applied on a commercially available SRAM manufacturedby Hynix Semiconductor Company.

• Journal of the Korean Institute of Navigation
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• v.22 no.4
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• pp.45-50
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• 1998

A recently constructed commercial ship is a complexive integrated system like a small city in which has a generator, power distributing facilities, various radio equipments and high power circuit breakers are installed. Therfore it could make a malfunction of the microprocessor in the various control units which are so important during the ocean voyage of larger ship. This paper has studied whether is properly required or not on the view of the actual electro magnetic compatibility status on the electromagnetic interference and suceptibility test requirments listed on the IACS (International Association of the Classification Society). Through these results, we are looking forward to the new suggestions of the Electro Magnetic Compatibility test in order to reduce the malfunction in the ship regarding test item, test level, and test condition.