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문재덕,정석환 ( Jae Duk Moon,Suk Hwan Chung ) 한국센서학회 1998 센서학회지 Vol.7 No.2
Methods and systems to remove static electricity are requested necessarily because the static electricity causes a flammable gas explosion, a fire, reduction of production rate in manufacturing VLSI semiconductor device and so on. In this paper, abrasion and dust contaminant of needle electrode are studied experimentally. And, frequencies and pulse durations of a high frequency pulse source were controlled effectively to minimize the abrasion of needle electrode and control generated numbers of ions. As a result, it is verified experimentally that the ion generation of charge neutralizer increases by using a high frequency pulse source.
소형 (小型) 정전 (靜電) 유도형 (誘導型) 모터의 기초연구 (基礎硏究)
문재덕,이동훈 ( Jae Duk Moon,Dong Hoon lee ) 한국센서학회 1993 센서학회지 Vol.2 No.1
A miniature size electrostatic induction motor has been fabricated and studied with emphasis on the role of the surface resistivity, the relative dielectric constant and the charge relaxation time constant of the rotor surface materials and the rotor liner materials, which, however, control the surface charge induction and relaxation on the rotor material surface and the field intensity between the rotor and the stator of the motor. It is found that the surface resistivity and/or the relative dielectric constant, and the charge relaxation time constant of the rotor surface material enfluenced significantly to motor speed controlled by the surface charge induction and rela cation on the rotor surface depending on the applied voltage and/or frequency changing. The resistivity of the rotor li a r material is also found to be effected to the motor speed greatly by control of the field intensity between the rotor and the stator and of the surface charge distribution of the induced charge on the rotor. As a result, a maximum no load rotor speed of the motor tested was about 5500 rpm at the applied voltage of 4.5 kV and the frequency of 220 Hz for the case of the rotor surface material of BaTiO₃ 80% in the resin binder layered on the copper-foil rotor liner material.
소형(小型) 정전(靜電) 유도형(誘導型) 모터의 기초(基礎) 연구(硏究)
문재덕,이동훈,Moon, Jae-Duk,Lee, Dong-Hoon 한국센서학회 1993 센서학회지 Vol.2 No.1
A miniature size electrostatic induction motor has been fabricated and studied with emphasis on the role of the surface resistivity, the relative dielectric constant and the charge relaxation time constant of the rotor surface materials and the rotor liner materials, which, however, control the surface charge induction and relaxation on the rotor material surface and the field intensity between the rotor and the stator of the motor. It is found that the surface resistivity and/or the relative dielectric constant, and the charge relaxation time constant of the rotor surface material enfluenced significantly to motor speed controlled by the surface charge induction and relaxation on the rotor surface depending on the applied voltage and/or frequency changing. The resistivity of the rotor liner material is also found to be effected to the motor speed greatly by control of the field intensity between the rotor and the stator and of the surface charge distribution of the induced charge on the rotor. As a result, a maximum no load rotor speed of the motor tested was about 5500 rpm at the applied voltage of 4.5 kV and the frequency of 220 Hz for the case of the rotor surface material of $BaTiO_{3}$ 80% in the resin binder layered on the copper-foil rotor liner material. 본(本) 연구(硏究)에서는 소형(小型) 정전유도형(靜電誘導型) 모터를 제작하고 이 모터에 인가하는 3상(相) 교류전압(交流電壓) 및 주파수(周波數)를 가변(可變)하였을 때의 회전자(回轉字)의 회전속도(回轉速度)의 특성을 실험적으로 검토하였다. 또한 정전유도형(靜電誘導型) 모터의 작동기구상(作動機構上) 회전자(回轉字) 표층물질(表層物質) 및 내층물질(內層物質)의 표면저항율(表面抵抗率), 비유전율(比誘電率) 및 전하완화시정수(電荷緩和時定數)를 변화시켜 회전자(回轉字) 및 고정자(固定子) 사이의 전계강도(電界强度) 및 회전자(回轉字) 표면물질상(表面物質上)의 표면유기전하(表面誘起電荷)의 분포(分布) 및 유기속도(誘起速度)를 변화시킴으로서 소형(小型) 정전유도형(靜電誘導型) 모터의 회전자의 회전속도에 미치는 영향을 검토하였다. 실험(實驗) 결과(結果), 회전자(回轉字) 표층물질(表層物質)의 비유전율(比誘電率), 표면저항률(表面抵抗率) 및 전하완화시정수(電荷緩和時定數) 및 내층물질(內層物質)의 비저항율(比抵抗率)이 모터의 회전속도(回轉速度)에 매우 큰 영향을 미침이 확인되었다. 또한 모터에 인가하는 3상(相) 전원(電源)의 전압(電壓) 및 주파수(周波數)도 모터의 회전(回轉)에 매우 큰 영향을 주며, 회전속도(回轉速度)는 인가전압(印加電壓) 및 주파수(周波數)에 일차(一次) 비례(比例)하여 증가함을 보여주었다. 회전자의 표층물질(表層物質)이 $BaTiO_{3}$ 80% 내층물질(內層物質)이 Cu 일때 무부하(無負荷) 최대속도(最大速度)는 4.5 kV, 220 Hz에서 5500 rpm이 얻어졌다.
침대 평판형 플라즈마장치의 코로나 방전 및 오존발생 특성에 미치는 원통형 3전극의 영향
文在德(Jae-Duk Moon),鄭皓駿(Ho-Jun Jung),鄭在勝(Jae-Seung Jung) 대한전기학회 2007 전기학회논문지 Vol.56 No.5
A point-plate type nonthermal plasma reactor, with a grounded cylindrical third electrode which closely-encompasses the needle point, have been investigated with an emphasis on the role of the third electrode. It was found that the point-plate airgap, with the grounded third electrode, had a switching characteristic on its Ⅰ-Ⅴ characteristics for negative and positive discharges, which is very different from that of a conventional point-plate airgap without a third electrode. The corona discharge and ozone generation characteristics of the plasma reactor with the grounded cylindrical third electrode, such as the corona onset voltage, the breakdown voltage, the corona current, and the amount of output ozone, were influenced significantly by the height of the third electrode, and these characteristics can be controlled by adjusting the height of the third electrode
文在德(Jae-Duk Moon),鄭在勝(Jae-Seung Jung) 대한전기학회 2006 전기학회논문지C Vol.55 No.6
In this paper a new wire-wire discharge system with a slit dielectric barrier has been proposed, and, its corona discharge and ozone generation characteristics have been investigated experimentally. When the slit mica barrier is installed between corona wires, instead of the grounded plate electrode, a significant increase in the generation of ozone, about 2.2 times higher than that of the conventional ones without the slit barrier, could be obtained. Photographs show that this type of discharge system with a slit barrier was found to produce a corona discharge twice, once from the upper and bottom corona wires. and. again from both sides of surfaces and slits of the slit barrier. As a result, the proposed discharge system has the potential to increase significantly ozone production and it may be useful as an effective means for removing pollutant gases.