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Y.Uchihori,Y.Kawamura,S.Morita,A.Kojina,J.M.Sun,Y.J.Kim,T.Izumi,M.Nakaoka 전력전자학회 1995 ICPE(ISPE)논문집 Vol.1995 No.10
This paper presents a novel prototype of a new concepttonal electromagnetic induction fluid heating appliance with eddy current-based flow-through thin metallic heater assembly, which is composed of the voltage source-fed type phase-shifted PWM series-load resonant high-frequency inverter using IGBT modules and thek driver modules in addition to a temperature sensor, and an auto-tuning PID gain controller for precise and stable temperature regulation scheme.<br/> In particular, the efficient series capacitor-compensated load resonant high-frequency inverter system with a power factor correction and active sinewave line current shaping functions is introduced as this induction-heated fluid heating appliance in pipeline used for industrial, medical, chemical, consumer power processing apphca-tions.<br/> Its operating characteristics in steady-state are illustrated and evaluated in experiment and its computer simulation results. The promising cost effective applications of this induction-heated fluid-heating appliance are mentioned from a practical point of view.
Yong-Ju Kim,Dae Cheul Shin,Kee Hwan Kim,Y.Uchihori,Y.Kawamura 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10
In this Paper are described the indirect induction heated boiler and induction heated hot air producer using the voltage-fed series resonant high-frequency inverter which can operate in the frequency range from 20 kHz to 50 kHz A specially designed induction heater, which is composed of laminated stainless assembly with many tiny holes and interconnected spot welding points between stainless plates, is inserted into the ceramic type vessel with external working coil This working coil is connected to the inverter and turbulence fluid through this induction heater to moving fluid generates fn the vessel The operating performances of this unique appliance in next generation and its effectiveness are evaluated and discussed from a practical point of view.<br/>
Ryu, Kwang-Sun,Park, Mi-Young,Chae, Jang-Soo,Lee, In,Uchihori, Yukio,Kitamura, Hisashi,Takashima, Takeshi 한국우주과학회 2012 Journal of Astronomy and Space Sciences Vol.29 No.3
We developed a mass-memory chip by staking 1 Gbit double data rate 2 (DDR2) synchronous dynamic random access memory (SDRAM) memory core up to 4 Gbit storage for future satellite missions which require large storage for data collected during the mission execution. To investigate the resistance of the chip to the space radiation environment, we have performed heavy-ion-driven single event experiments using Heavy Ion Medical Accelerator in Chiba medium energy beam line. The radiation characteristics are presented for the DDR2 SDRAM (K4T1G164QE) fabricated in 56 nm technology. The statistical analyses and comparisons of the characteristics of chips fabricated with previous technologies are presented. The cross-section values for various single event categories were derived up to ~80 MeVcm2/mg. Our comparison of the DDR2 SDRAM, which was fabricated in 56 nm technology node, with previous technologies, implies that the increased degree of integration causes the memory chip to become vulnerable to single-event functional interrupt, but resistant to single-event latch-up.
전압형 고주파 인버터를 이용한 간접유도가열 열유체 에너지시스템과 그 성능평가
김용주(Y J Kim),신대철(D C Shin),김기환(K H Kim),내굴 의융(Y Uchihori),천촌 태삼(Y Kawamura) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This Paper the state-of-the art indirect induction heated boiler and induction heated hot air producer using the voltage-fed series resonant high-frequency inverter whice can operate in the frequency range from 20kHz to 50kHz. A specially-designed induction heater composed of laminated stainless assembly with many tiny holes and interconnected spot welding points between stainless plates is inserted into the ceramic type vessel with external working coil connected to the inverter and tubelence fluid through this induction heater to moving fluid generates in the vessel. The operating performances of this unique appliance in next generation and its effectiveness are evaluated and discussed from a practical point of view.
Calibration of TEPC for CubeSat Experiment to Measure Space Radiation
Uk-Won Nam,Won-Kee Park,Jaejin Lee,Jeonghyun Pyo,Bong-Kon Moon,Dae-Hee Lee,Sunghwan Kim,Ho Jin,Seongwhan Lee,Jungho Kim,Hisashi Kitamura,Yukio Uchihori 한국우주과학회 2015 Journal of Astronomy and Space Sciences Vol.32 No.2
A newly designed Tissue Equivalent Proportional Counter (TEPC) has been developed for the CubeSat mission, SIGMA (Scientific cubesat with Instruments for Global Magnetic field and rAdiation) to investigate space radiation. In order to test the performance of the TEPC, we have performed heavy ion beam experiments with the Heavy Ion Medical Accelerator in Chiba (HIMAC), Japan. In space, human cells can be exposed to complex radiation sources, such as X-ray, Gamma ray, energetic electrons, protons, neutrons and heavy charged particles in a huge range of energies. These generate much a larger range of Linear Energy Transfer (LET) than on the ground and cause unexpected effects on human cells. In order to measure a large range of LET, from 0.3 to 1,000 keV/μm, we developed a compact TEPC which measures ionized particles produced by collisions between radiation sources and tissue equivalent materials in the detector. By measuring LET spectra, we can easily derive the equivalent dose from the complicated space radiation field. In this HIMAC experiment, we successfully obtained the linearity response for the TEPC with Fe 500 MeV/u and C 290 MeV/u beams and demonstrated the performance of the active radiation detector.
Calibration of TEPC for CubeSat Experiment to Measure Space Radiation
Nam, Uk-Won,Park, Won-Kee,Lee, Jaejin,Pyo, Jeonghyun,Moon, Bong-Kon,Lee, Dae-Hee,Kim, Sunghwan,Jin, Ho,Lee, Seongwhan,Kim, Jungho,Kitamura, Hisashi,Uchihori, Yukio The Korean Space Science Society 2015 Journal of Astronomy and Space Sciences Vol.32 No.2
A newly designed Tissue Equivalent Proportional Counter (TEPC) has been developed for the CubeSat mission, SIGMA (Scientific cubesat with Instruments for Global Magnetic field and rAdiation) to investigate space radiation. In order to test the performance of the TEPC, we have performed heavy ion beam experiments with the Heavy Ion Medical Accelerator in Chiba (HIMAC), Japan. In space, human cells can be exposed to complex radiation sources, such as X-ray, Gamma ray, energetic electrons, protons, neutrons and heavy charged particles in a huge range of energies. These generate much a larger range of Linear Energy Transfer (LET) than on the ground and cause unexpected effects on human cells. In order to measure a large range of LET, from 0.3 to $1,000keV/{\mu}m$, we developed a compact TEPC which measures ionized particles produced by collisions between radiation sources and tissue equivalent materials in the detector. By measuring LET spectra, we can easily derive the equivalent dose from the complicated space radiation field. In this HIMAC experiment, we successfully obtained the linearity response for the TEPC with Fe 500 MeV/u and C 290 MeV/u beams and demonstrated the performance of the active radiation detector.