• 제목/요약/키워드: Driving nozzle

검색결과 68건 처리시간 0.023초

공진형 인버터를 사용한 적층액츄에이터형 초음파 노즐 구동시스템의 전기적 특성 (Electrical Properties of Multilayer Actuator Structured-ultrasonic Nozzle Driving System using a Resonant Inverter)

  • 황락훈;김화수;김국진;류주현
    • 한국전기전자재료학회논문지
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    • 제20권11호
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    • pp.953-958
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    • 2007
  • In this paper, multilayer actuator structured-ultrasonic nozzle and resonant inverter driving circuit were manufactured, respectively. Its electrical properties were investigated. Multilayer actuator structured ultrasonic nozzle was fabricated using PMN-PNN-PZT ceramics showing excellent piezoelectric characteristics. In order to drive ultrasonic nozzle, resonant PWM inverter was used. The purpose of this study is to find the optimal driving condition of ultrasonic nozzle. Accordingly, electrical and temperature characteristic of multilayer ultrasonic driving system were investigated by experiments as a function of the series resonance inductance. The driving current of ultrasonic nozzle showed the maximum current of 27 mA. Also, the surface temperature of ceramic vibrator showed $44^{\circ}C$ at driving time for 20 min. The ultrasonic nozzle was stably operated in the case of driving for more than 20 min.

초음파 노즐의 최적 구동 특성 (Optimum Driving Characteristics of U1trasonic Nozzle)

  • 김화수;이상호;황락훈;류주현;김국진
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
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    • pp.272-273
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    • 2007
  • In this paper, ultrasonic nozzle and driving circuit were manufactured, respectively. And then, their electrical properties. were investigated. Ultrasonic nozzle was fabricated using PSN-PMN-PZT ceramics showing excellent piezoelectric characteristics. In order to drive ultrasonic nozzle, PWM controller(KA3525A) was used. The purpose of this study is to find the optimal driving condition of ultrasonic. nozzle. Accordingly electrical and temperature characteristic of ultrasonic driving system were investigated as a function of the input voltage.

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구동회로에 따른 초음파 노즐의 분무 특성 (The Aerosol Characteristics of Utrasonic Nozzle on the Driving Circuits)

  • 이수호;민석규;윤광희;류주현;사공건
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2001년도 하계학술대회 논문집
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    • pp.1005-1009
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    • 2001
  • The application of the ultrasonic nozzle has been extended because it is possible atomization of liquid material. In this study, the driving characteristics of the ultrasonic nozzle on the driving circuit were investigated. And the characteristics of the ceramic oscillator were investigated for the temperature stability. The ceramic oscillator were made the Pb[(Sb$\sub$1/2/,Nb$\sub$1/2/)$\sub$0.035/-(Mn$\sub$1/3/Nb$\sub$2/3/)$\sub$0.065/- (Zr$\sub$x/Ti$\sub$l-x/)$\sub$0.9/]O$_3$with mole ratio of Zr/Ti. The ceramis oscillator were need the curie temperature of the over 300[$^{\circ}C$] for the temperature stability. When the Zr/Ti ratio was 49/51, it's curie temperature is 322[$^{\circ}C$] and the electromechanical coupling factor(k$\sub$p/) and mechanical quality factor(Q$\sub$m/) showed the values of 0.555, 1,214, respectively The resonance frequency of ceramic oscillator were from 40KHz to 45KHz. So that, the driving circuit were made a possibility that the frequency are variable. The driving current of ultrasonic nozzle showed the value of maximum 80[mA]. Also, The surface temperature of ceramic oscillator showed 80[$^{\circ}C$] at driving time 10[min]. We knew that the ultrasonic nozzle had stabile driving above 10[min.].

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공기구동 이젝터의 노즐 형상과 위치 변화에 따른 성능 특성 (Performance Characteristics of Air Driven Ejector According to the Position Changes and the Shape of Driving Nozzle)

  • 지명국;김필환;박기태;토니우토모;정한식;정효민
    • Journal of Advanced Marine Engineering and Technology
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    • 제32권4호
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    • pp.550-556
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    • 2008
  • The aim of this research is to analyze the influence of motive pressure, driving nozzle position and nozzle throat ratio on the performance of ejector. The experiment was conducted in the variation of motive pressure of 0.196, 0.294, 0.392 and 0.490MPa respectively. The position of driving nozzle was varied in difference locations according to mixing tube diameter(0.5d, 1d, 2d, 3d, 4.15d, 5d and 6d). The experimental results show when the nozzle outlet is located at 3d, the flow characteristics change abruptly. It is shown that the suction flow rate and pressure lift ratio of ejector is influenced by the driving nozzle position. At nozzle position location of the Id of mixing tube diameter the performance of ejector gives the best performance.

액체 연료의 분무를 위한 압전 세라믹 진동자의 설계 및 동작 특성 (The Design and Driving Characteristics of Piezoelectric Ceramic Oscillator for Spraying of Liquid Material)

  • 이수호;석정영;류기홍;김한근;김진규;류주현;사공건
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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    • pp.686-689
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    • 2002
  • The application of the ultrasonic nozzle has been extended because it is possible atomization of liquid material. In this study, the characteristics of the ultrasonic nozzle and ceramic oscillator were investigated. The oscillator for the ultrasonic nozzle were made piezoelectric ceramic of $Pb[(Sb_{1/2}Nb_{1/2})_{0.035}-(Mn_{1/3}Nb_{2/3})_{0.065}-(Zr_{0.49}Ti_{0.51})_{0.90}]O_3$. The electromechanical coupling factor$(k_p)$ and mechanical quality factor$(Q_m)$ showed the values of 0.555, 1,214 respectively when the Zr/Ti ratio was 49/51. Moreover, this oscillator will have the temperature stability because it's curie temperature is $322[^{\circ}C]$. The driving current of ultrasonic nozzle showed the value of 80[mA] when the driving time was 10[min.]. Also, The surface temperature of ceramic oscillator showed $80[^{\circ}C]$ at driving time 10[min.] We knew that the ultrasonic nozzle had stabile driving above 10[min.].

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초음파 진동자 응용을 위한 압전 세라믹의 유전 및 전기적 특성 (The Dielectric and Electrical Characteristics of Piezoelectric Ceramic for Ultrasonic Oscillator Application)

  • 이수호;민석규;윤광희;류주현;사공건
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2000년도 추계학술대회 논문집
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    • pp.200-203
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    • 2000
  • The application of the ultrasonic nozzle has been extended because it is possible atomization of liquid material. In this study, the characteristics of the ultrasonic nozzle and ceramic oscillator were investigated. The oscillator for the ultrasonic nozzle were made piezoelectric ceramic of Pb[($Sb_{1/2}$ $Nb_{1/2}$)$_{0.035}$-($Mn_{1/3}$$Nb_{2/3}$)$_{0.065}$-($Zr_{0.49}$$Ti_{0.51}$)$_{0.90}$]$O_3$. The electromechanical coupling factor($k_p$) and mechanical quality factor(Qm) showed the values of 0.555, 1, 214 respectively when the Zr/Ti ratio was 49/51. Moreover, this oscillator will have the temperature stability because it's curie temperature is 322[$^{\circ}C$]. The driving current of ultrasonic nozzle showed the value of 80[mA] when the driving time was lO[min.]. Also, The surface temperature of ceramic oscillator showed 80[$^{\circ}C$] at driving time lO[min.] We knew that the ultrasonic nozzle had stabile driving above 10[min.].

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초음파 노즐구동회로의 모델링과 동작특성 (Driving Characteristics and Modeling of Ultrasonic Nozzle Driving Circuit)

  • 이상호;김화수;황락훈;류주현;김국진
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 추계학술대회 논문집 전기물성,응용부문
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    • pp.79-80
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    • 2006
  • In this paper, ultrasonic nozzle and driving circuit were manufactured and their electrical properties were investigated. Uitrasonic nozzle was fabricated using PSN-PMN-PZT ceramics showing excellent piezoelectric characteristics. In order to drive ultrasonic nozzle, PWM controller(KA3525A) was used. With increasing input voltage of nozzle, particle diameters of diesel were increased up tot 16V and then decreased. At the input voltage of 12V, volume particle diameter showed the minimum value of $37.3{\mu}m$ and also at the input voltage of 18V, volume particle diameter showed the maximum value of $51.3{\mu}m$.

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1 튜브 2 챔버 Bent Silkworm형 염색기의 구동특성 (Driving Characteristics of a 1 Tube 2 Chamber Bent Silkworm Type Dyeing Machine)

  • 이춘길;성우경;이광수
    • 한국염색가공학회지
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    • 제11권2호
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    • pp.64-74
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    • 1999
  • The driving characteristics of the 1 tube 2 chamber bent silkworm type dyeing machine are reported. This dyeing machine is a newly developed energy saving machine. In this study, the driving characteristics of the 1 tube 2 chamber bent silkworm type dyeing machine are examined. Specially the relationship between main body pressure and the electric current of the blower motor, the relationship between main body pressure and the air pressure of the blower nozzle, the effect of the air pressure of the blower on the running speed of the fabric, and the effect of main body temperature were discussed experimentally. Through the experimental data, the following results were obtained. 1. Blower motor electric current and blower nozzle air pressure increased as main body pressure increased due to the temperature increase of the main body. 2. The running speed of the fabric increased as blower nozzle air pressure increased. The difference in running speed between winch reel driving and no winch reel driving at a blower frequency of 60Hz was higher than that of 70Hz. 3. The electric current of the blower rioter and blower nozzle air pressure increased rapidly at the initial state. As the experimental time passed, the main body pressure increased slowly. as the main body temperature increased.

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공기구동 기체이젝터의 성능특성에 관한 연구 (A Study on the Performance Characteristics of Air Driven Gas Ejector)

  • 홍영표;윤두호;김용모;윤석훈
    • Journal of Advanced Marine Engineering and Technology
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    • 제18권1호
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    • pp.51-59
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    • 1994
  • The gas jet pumps serve to preduce a vacuum or can be used as gas jet compressors. These are operated on the same principle as a steam jet vacuum pump : in the driving nozzle the pressure energy of the motive medium is converted into the kinetic energy. In the diffuser the driving jet mixes with the suction medium and the kinetic energy is reconverted into the pressure enegy. The application fields of gas jet ejectors are the evacuation of siphoning installations, the elevation of liquids, the production of vacuum filters, the vacuum supporting airlift system, the evacuation of the suction line of centrifugal pumps and the ventilation of the dangerous gases to the atmosphere. The performance of gas jet ejector is influenced strongly to velocity coefficient of motive nozzle, the distance between the motive outlet to the diffuser inlet and the dimensions of diffuser. This study is performed for the computer aided design of gas jet ejectors in future. Through the present experiments, it is known that the velocity coefficient of the motive air nozzle ranges from 0.91 to 0.95 and the maximum efficiency of gas jet ejector is 24.6%.

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Numerical Simulation: Effects of Gas Flow and Rf Current Direction on Plasma Uniformity in an ICP Dry Etcher

  • Joo, Junghoon
    • Applied Science and Convergence Technology
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    • 제26권6호
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    • pp.189-194
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    • 2017
  • Effects of gas injection scheme and rf driving current configuration in a dual turn inductively coupled plasma (ICP) system were analyzed by 3D numerical simulation using CFD-ACE+. Injected gases from a tunable gas nozzle system (TGN) having 12 horizontal and 12 vertical nozzles showed different paths to the pumping surface. The maximum velocity from the nozzle reached Mach 2.2 with 2.2 Pa of Ar. More than half of the injected gases from the right side of the TGN were found to go to the pump without touching the wafer surface by massless particle tracing method. Gases from the vertical nozzle with 45 degree slanted angle soared up to the hottest region beneath the ceramic lid between the inner and the outer rf turn of the antenna. Under reversed driving current configuration, the highest rf power absorption region were separated into the two inner islands and the four peaked donut region.