• Steel and Composite Structures
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• 제47권3호
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• pp.315-337
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• 2023

The steel structure is an assembly of individual structural members joined together by connections. The connections are the focal point to transfer the forces which is susceptible to damage easily. It is challenging to replace the affected connection parts after an earthquake. Hence, steel plates are utilised as a structural fuse that absorbs connection forces and fails first. The objective of the present research is to develop a beam-column end plate connection with single and dual fuse and study the effect of single fuse, dual fuse and combined action of fuse and damper. In this research, seismic resilient beam-column end plate connection is developed in the form of structural fuse. The novel connection consists of one main fuse was placed horizontally and secondary fuse was placed vertically over main fuse. The specimens are fabricated with the variation in number of fuse (single and dual) and position of fuse (beam flange top and bottom). From the fabricated ten specimens five specimens were loaded monotonically and five cyclically. The experimental results are compared with Finite Element Analysis results of Arunkumar and Umamaheswari (2022). The results are critically assessed in the aspect of moment-rotation behaviour, strain in connection components, connection stiffness, energy dissipation characteristics and ductility. While comparing the performance of total five specimens, the connection with fuse exhibited superior performance than the conventional connection. An equation is proposed for the moment of resistance of end-plate connection without and with structural fuse.

• 항공우주기술
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• 제11권1호
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• pp.1-6
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• 2012

인공위성의 전력 시스템을 보호하기 위해서 퓨즈나 LCL (Latching Current Limiter) 등을 부하와 전원 공급 장치 사이에 연결한다. 본 논문에서는 인공위성에서 장착되는 퓨즈의 용량 선정 기법에 대해 논하였다. 퓨즈 용량 선정 방법에 대해 기술하였고, 병렬 (Parallel) 퓨즈 연결 방식을 수학식으로도 단일 (Single) 퓨즈 연결 방식으로 나타낼 수 있음을 보였다. 또한, 퓨즈에 연결되는 부하의 정확한 전류 특성이 알려지지 않은 상태에서 적절한 퓨즈 선정 기법을 새롭게 제시하였다.

• 전기전자학회논문지
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• 제26권3호
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• pp.422-429
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• 2022

조도센서 칩은 아날로그 회로의 트리밍이나 디지털 레지스터의 초기 값을 셋팅하기 위해 소용량의 eFuse(electrical Fuse) OTP(One-Time Programmable) 메모리 IP(Intellectual Property)를 필요로 한다. 본 논문에서는 1.8V LV(Low-Voltage) 로직 소자를 사용하지 않고 3.3V MV(Medium Voltage) 소자만 사용하여 128비트 eFuse OTP IP를 설계하였다. 3.3V 단일 MOS 소자로 설계한 eFuse OTP IP는 1.8V LV 소자의 gate oxide 마스크, NMOS와 PMOS의 LDD implant 마스크에 해당되는 총 3개의 마스크에 해당되는 공정비용을 줄일 수 있다. 그리고 1.8V voltage regulator 회로가 필요하지 않으므로 조도센서 칩 사이즈를 줄일 수 있다. 또한 조도센서 칩의 패키지 핀 수를 줄이기 위해 프로그램 전압인 VPGM 전압을 웨이퍼 테스트 동안 VPGM 패드를 통해 인가하고 패키징 이후는 PMOS 파워 스위칭 회로를 통해 VDD 전압을 인가하므로 패키지 핀 수를 줄일 수 있다.

• 전기학회논문지P
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• 제64권3호
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• pp.111-115
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• 2015

Recently, protection coordination issues can occur due to increased fault current in power system when power system being changed radial power system to grid system such as loop power system, micro grid and smart grid. This paper analyzed Recloser-Fuse coordination in loop power distribution system with Superconducting Fault Current Limiters(SFCLs) when single line ground fault occur in loop power distribution system with SFCLs. We analyzed Recloser-Fuse Coordination in radial power distribution system and changed coordination caused by increased Fault current because of loop system when single line ground fault occur in power distribution system. This paper simulated to improve changed coordination using SFCLs in loop power distribution system. Power distribution system, SFCLs and protective devices are modeled using PSCAD/EMTDC.

• 한국정보전자통신기술학회논문지
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• 제8권4호
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• pp.310-318
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• 2015

본 논문에서는 cell 사이즈가 작은 dual port eFuse OTP(One-Time Programmable)를 사용하면서 VREF(Reference Voltage) 회로를 eFuse OTP IP(Intellectual Property)에 하나만 사용하고 S/A(Sense Amplifier) 기반의 D F/F을 사용하는 BL(Bit-Line) 센싱 회로를 제안하였다. 제안된 센싱 기술은 read current를 6.399mA에서 3.887mA로 줄일 수 있다. 그리고 아날로그 센싱을 하므로 program-verify-read 모드와 read 모드에서 프로그램된 eFuse의 센싱 저항은 각각 $9k{\Omega}$, $5k{\Omega}$으로 낮출 수 있다. 그리고 설계된 32비트 eFuse OTP 메모리의 레이아웃 면적은 $187.845{\mu}m{\times}113.180{\mu}m$ ($=0.0213mm^2$)으로 저면적 구현이 가능한 것을 확인하였다.

• Structural Engineering and Mechanics
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• 제36권6호
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• pp.715-727
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• 2010

An experimental investigation is conducted here to study the effects of applying frictional sliding fuses (FSF) in concrete infilled steel frames. Firstly, the influences of some parameters on the behavior of the sliding fuse are studied: Methods of adjusting the FSF for a certain sliding strength are explained and influences of time duration, welding and corrosion are investigated as well. Based on the results, time duration does not significantly affect the FSF, however influences of welding and corrosion of the constitutive plates are substantial. Then, the results of testing two 1/3 scale single-storey single-bay concrete infilled steel frames having FSF are presented. The specimens were similar, except for different regulations of their fuses, tested by displacement controlled cyclic loading. The results demonstrate that applying FSF improves infill behaviors in both perpendicular directions. The infilled frames with FSF have more appropriate hysteresis cycles, higher ductility, much lower deteriorations in strength and stiffness in comparison with regular ones. Consequently, the infills, provided with FSF, can be regarded as an engineered element, however, special consideration should be taken into the affecting parameters of their fuses.

• 한국전기전자재료학회논문지
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• 제33권3호
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• pp.201-207
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• 2020

With the expansion in the use of DC power systems and increased need for system maintenance, the development of measurement devices for maintenance requires high stability. Of the different kinds of DC current measurement devices, the single-shot measurement device causes the input signal of the current measuring unit to initially generate a high inrush current. The high inrush current flows into the signal processor of the meter, shortening the life of the internal fuses and causing failure. Therefore, in this study, the I²t value for increasing the durability of the fuse is designed using the available wire diameter. Operating characteristics for 210~400% over-current of the rated current, which is relatively low over-current, are realized by the plating of low melting tin metal. As a result, a method of designing a fuse element for a DC power supply, which improves the safety of the DC current measurement device by blocking the failure caused by the inrush current, is presented.

• 한국정보통신학회논문지
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• 제16권8호
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• pp.1734-1740
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• 2012

본 논문에서는 단일전원을 사용하는 PMIC 칩이 패키지 상태에서 eFuse OTP 메모리를 프로그램 가능하도록 스위칭 전류가 작은 FSOURCE 회로를 제안하였다. 제안된 FSOURCE 회로는 non-overlapped clock을 사용하여 short-circuit current를 제거하였으며, 구동 트랜지스터의 ON되는 기울기를 줄여 최대 전류를 줄였다. 그리고 power-on reset 모드동안 eFuse OTP의 출력 데이터를 임의의 데이터로 초기화시키는 DOUT 버퍼 회로를 제안하였다. $0.35{\mu}m$ BCD 공정을 이용하여 설계된 24비트 differential paired eFuse OTP 메모리의 레이아웃 면적은 $381.575{\mu}m{\times}354.375{\mu}m$($=0.135mm^2$)이다.

• 한국인터넷방송통신학회논문지
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• 제15권6호
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• pp.251-255
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• 2015

본 논문은 IoT 응용분야에서 주변 사물에 대한 보정 값이나 최적 값을 저장하는 퓨즈 제어 회로를 제안하였고, 단일 핀을 사용한 직렬 통신 회로를 구현하였다. 2개 이상의 핀을 사용하는 기존 직렬 방식인 SPI 와 $I^2C$ 방식보다 단일 핀을 사용하여 간단한 하드웨어로 구현함으로써 비교적 전송 데이터가 적은 응용 분야에서 효율적으로 사용이 가능하다. 제안된 통신 프로토콜과 퓨즈 제어 회로는 논리 회로 시뮬레이션과 FPGA를 이용하여 동작을 검증하고, CMOS 공정을 이용하여 칩으로 설계하였다. 저전력과 하드웨어가 간단하고 저속의 데이터 전송용 모바일 IoT 제품에 활용이 예상된다.

• Structural Engineering and Mechanics
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• 제84권2호
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• pp.269-283
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• 2022

In this paper, a particular type of all-steel HSS brace members with a locally reduced cross-sectional area was experimentally and numerically investigated. The brace member was strengthened against local buckling with inner and outer boxes in the reduced area. Four single-span braced frames were tested under cyclic lateral loadings. Specimens included a simple steel frame with a conventional box-shaped brace and three other all-steel reduced section buckling-restrained braces. After conducting the experimental program, numerical models of the proposed brace were developed and verified with experimental results. Then the length of the proposed fuse was increased and its effect on the cyclic behavior of the brace was investigated numerically. Eventually, the brace was detailed with a fuse-to-brace length of 30%, as well as the cross-sectional area of the fuse-to-brace of 30%, and the cyclic behavior of the system was studied numerically. The study showed that the proposed brace is stable up to a 2% drift ratio, and the plastic cumulative deformation requirement of AISC (2016) is easily achieved. The proposed brace has sufficient ductility and stability and is lighter, as well as easier to be fabricated, compared to the conventional mortar-filled BRB and all-steel BRB.