리튬이온 배터리 동특성 및 안전성 평가를 위한 배터리 시뮬레이터 시험설비

정성인,윤용호,Sungin Jeong,Yongho Yoon 한국인터넷방송통신학회 2024 한국인터넷방송통신학회 논문지 Vol.24 No.2

Lithium-ion batteries are used in many fields due to their high energy density, fast charging conditions, and long cycle life. However, overcharging, over-discharging, physical damage, and use of lithium-ion batteries at high temperatures can reduce battery life and cause damage to people due to fire or explosion due to damage to the protection circuit. In order to reduce the risk of these batteries and improve battery performance, the characteristics of the charging and discharging process must be analyzed and understood. Therefore, in this paper, we analyze the charging and discharging characteristics of lithium-ion batteries using a battery charger and discharger and simulator to reduce the risk of loss of life due to overcharge and overdischarge, as well as casualties from fire and explosion due to damage to the protection circuit.

매니코어 운영체제 연구현황 및 계획

정성인,김태수,민창우,박성용,변석우,서의성,우균,이경우,이재욱,임성수,임은진,조희승,진현욱,Jung, Sungin,Kim, Taesoo,Min, Changwoo,Park, Sungyong,Byun, Sugwoo,Seo, Euiseong,Woo, Gyun,Lee, Kyoungwoo,Lee, Jaewook,Rim, Sung-Soo,Im, Eun-Jin,Jo, 한국전자통신연구원 2017 전자통신동향분석 Vol.32 No.6

The trend of manycore hardware has recently evolved more quickly than expected. However, an operating system, which is software used for managing computer resources, is still optimized for a multicore system. To handle this issue, we started a research project called 'Research on High Performance and Scalable Manycore Operating Systems' in 2014. This article briefly examines the technology trends of manycore hardware and operating systems, and introduces the research areas and outcomes during the first stage of the project(2014-2017). The core technologies improving the performance scalability of manycore systems are publicly available, and anyone can use the source code or apply the ideas of the core technique to other research activities. In addition, the research plans of the second stage of the project(2018-2021) are also included.

스위치드 릴럭턴스 전동기의 Δ결선, Y결선에 따른 구동 특성

정성인 대한전기학회 2021 전기학회논문지 Vol.70 No.6

A general SRM driving converter uses an asymmetric bridge converter with a structure in which a winding is placed between the upper and lower switches to excite one by one. The asymmetric bridge converter has a structure having two switches and two freewheeling diodes, so it has high efficiency and can control various types, and the current control of each phase is independent, so it is possible to overlap the current of two phases. In addition, even when a fault occurs in one phase, there is no significant effect on the other phase, and the control performance is excellent, such as a relatively low rated voltage of the device. On the other hand, the number of elements is relatively large, the drive circuit is complicated, and it is impossible to modularize the switching element. Therefore, the size of the heat sink for the switching element and the freewheeling diode increases, and thus the production cost increases. It is possible to simplify the AC motor drive system by using IPM(Intelligent Power Module) modularized with six switching elements as a connection structure between AC motors such as induction motors and synchronous motors and generalpurpose inverters with upper and lower switches. Therefore, there is an advantage of being able to reduce the size and structure of a simplified circuit compared to an SRM driving system using an asymmetric bridge converter. In this paper, considering these contents, to apply the general-purpose inverter used in AC motors instead of the asymmetric bridge converter used in generalpurpose SRM driving converters, we will examine the driving characteristics according to the Δ-connection and Y-connection of the SRM connection structure. In addition, we will study the switching control method to apply the universal inverter of AC motor according to the Δ-connection and Y-connection.

고속 중형 컴퓨터 운영체제 커널 개발 ( Development of Operating System Kernel in TICOM III System )

정성인,김선자,김해진,임기욱 대한전자공학회 1995 대한전자공학회 학술대회 Vol.1995 No.7

선형 전기기기의 동특성을 고려한 축 설계

정성인 대한전기학회 2024 전기학회논문지 Vol.73 No.3

Electrical machinery with rotating or linear mass requires a support system that can resist dynamic forces and the resulting vibrations. The excess of such vibrations may be detrimental to the machinery and its support system. Especially, it becomes more and more important for dynamic equipment foundations due to various design criteria and methods and procedures of analysis, design and construction. For stable operation of the equipment foundations, kinetics is an important tool in understanding the motion of objects whether translational, oscillatory, or circular. In case of translating or linear oscillating masses, the behavior of variables such as speed and acceleration (deceleration) must be described by the equations of motion. Of importance is the mechanical robustness, because a linear electric machine has to withstand high accelerations resulting from the oscillating masses. This paper deals with the design of shaft and bolt is achieved by fatigue analysis based on the kinetic equation considering mechanical load. The results of the study will give elaborate information about stable and effective movement data of linear electric machine.

스위치드 릴럭턴스 전동기 (SRM) 회전자 위치 검출 및 초기 위치확보 연구

정성인 한국인터넷방송통신학회 2020 한국인터넷방송통신학회 논문지 Vol.20 No.3

브러시리스 DC 전동기(BLDC)는 스위치의 on/off 각이 최적의 고정자와 회전자의 정렬상태에 의해 결정되는 반면에, 스위치드 릴럭턴스 전동기 (SRM)은 스위치의 on/off 각이 많은 파라미터의 복잡한 함수로 나타나고 따라서 최적의 운전을 하기 위해서는 스위칭 각이 가변적으로 된다. 따라서 스위치드 릴럭턴스 전동기 (SRM)을 최적으로 운전 하기 위해서 고해상도의 위치 센서와 복잡한 부가 회로 등을 이용하여 회전자 위치를 검출할 수 있다. 본 논문에서는 스위치드 릴럭턴스 전동기 (SRM)를 구동할 수 있는 여러 가지 방법 중 엔코더, 홀센서, 옵토-인터럽터 (opto interrupter) 등 다양한 센서들을 활용하여 회전자 위치 검출 및 관련 위치 검출 회로적용, 검출된 회전자의 초기위치 확보에 관한 연구를 하였다. In brushless DC motors (BLDC), the on/off angle of the switch is determined by the optimal alignment of the stator and rotor, while switched reluctance motors (SRM) are complex parameters with many on/off angles of the switch. It appears as a function and therefore the switching angle is variable for optimal operation. Therefore, in order to operate the switched reluctance motor (SRM) optimally, the rotor position can be detected using a high resolution position sensor and a complicated additional circuit. In this paper, rotor position detection and related position detection circuits are applied and detected by using various sensors such as encoder, hall sensor and opto interrupter among several methods to drive switched reluctance motor (SRM). Also a study on securing the initial position of the rotor was conducted.

과학기술위성3호의 전력분배장치 설계

정성인,신근수,신구환,강경인,명로훈 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-

디지털 방사선 검사장치(DR)의 AC 서보 시스템 설계

정성인 한국인터넷방송통신학회 2022 한국인터넷방송통신학회 논문지 Vol.22 No.3

Digital radiation inspection equipment is a medical device that deals with human life and requires stability and high reliability. However, this system is currently the most advanced technology and the domestic market is almost occupied by European products including Japan. Therefore, research and development are needed not only to replace domestic medical devices, which are largely dependent on expensive imported products, but also to develop more economical and user-oriented products that are easy to operate and produce devices that lead to accurate diagnosis. In particular, among the digital X-ray systems, the motor driving technology and the mechatronics technology related to the development of mechanical devices have matured to some extent in Korea. In this paper, selection of AC servomotor for digital radiation inspection suitable for imaging purpose, and application of conversion device and control method to check performance and improve problems. 디지털 방사선 검사장 치는 인간의 생명을 다루는 의료장치로 안정성과 고신뢰성이 필요하지만 이러한 시스템은현재 최첨단 기술로 일본을 비롯한 유럽제품에 의해서 국내시장은 거의 점유된 실정이다. 따라서 상당한 부분 값비싼수입품에 의존하고 있는 의료기기의 국산품 대체는 물론, 보다 경제적이고 조작하기 쉬운 사용자 위주의 제품을 개발, 정확한 진단을 이끄는 장치의 생산을 위한 연구와 개발이 필요하다. 특별히 디지털 X-ray 시스템 중에서 전동기 구동기술과 기계장치 개발 관련 메카트로닉스 기술은 국내에 어느 정도 성숙되어 있는 단계로 본 논문에서는 디지털 방사선검사 장치(DR)의 전동기 서보 시스템 설계를 통하여 제어기법과 성능을 확인하고자 한다. 본 논문에서는 촬영용도에부합하는 디지털 방사선 검사용 AC 서보전동기의 선정과 변환장치 및 제어기법을 적용하여 성능을 확인하고 문제점을개선함에 있다.

펄스 신호 및 절연저항 측정 알고리즘을 이용한 전동기 열화 추정

정성인,Jeong, Sungin 한국인터넷방송통신학회 2022 한국인터넷방송통신학회 논문지 Vol.22 No.5

전동기 소손의 원인으로는 과부하, 결상, 구속, 층간단락, 권선의 지락, 순간과전압의 유입, 회전자가 고정자에 닿는 경우 등 절연파괴로 이어져 고장 또는 전기 사고로 이어지고 있다. 따라서 기기 고장은 기기의 보수/수리에 필요한 비용에 의한 손실뿐만 아니라, 전동기가 포함된 공정 자체를 멈추기 때문에 공정 정지에 따른 생산성 저하에 의한 막대한 경제적 손실을 초래한다. 전동기의 고장을 진단하기 위한 현재의 기술의 수준은 진동, 열, 전력분석 방식을 이용하고 있지만, 고장에 따른 상당 부분의 시간이 진행되어야 문제점을 분석할 수 있는 한계점을 가지고 있다. 따라서 본 논문에서는 이러한 문제점을 해결하고자 DC AMP 신호를 이용하여 절연저항을 측정하는 장치 및 알고리즘을 산업용 전동기에 적용하여 절연저항 상태값을 추종하여 기존방식에서 해결되지 못한 전동기의 열화 및 고장 진단을 제안한다.

감마선 조사를 이용한 폴리우루시올 합성 및 특성 평가

정성인,박종석,임윤묵,윤국중 (사)한국방사선산업학회 2021 방사선산업학회지 Vol.15 No.1

Urushiol, mainly extracted from lacquer tree, is known to have excellent thermalstability, antibacterial properties, and antioxidant properties. Since urushiol cannot be effectivelysynthesized, it is common to extract it from lacquer tree using organic solvents. In this study,polyurushiol was successfully synthesized by simultaneous gamma-irradiation cross-linkingusing binary monomer mixtures (urushiol/3-(trimethoxysilyl)propyl methacrylate (TMPMA)and urushiol/dipentaerythritol hexaacrylate (DPEHA)) in various ethanol/H2O2 solutions. Thestructural changes and thermal properties of the synthesized polyurushiol were confirmedthrough Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM),thermal gravimetric analyzer (TGA), and contact angle measurements. Gamma-ray irradiationwas performed to grafting the monomer into urushiol with hydrophobic TMPMA or hydrophilicDPEHA, and it was confirmed that thermal behavior and moisture barrier properties wereeffectively improved through this.