• Title/Summary/Keyword: discharge voltage

Search Result 2,206, Processing Time 0.029 seconds

Fabrication of Atmospheric Coplanar Dielectric Barrier Discharge and Analysis of its Driving Characteristics (평면형 대기압 유전장벽방전장치의 제작 및 동작특성분석)

  • Lee, Ki-Yung;Kim, Dong-Hyun;Lee, Ho-Jun
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.63 no.1
    • /
    • pp.80-84
    • /
    • 2014
  • The discharge characteristics of Surface Dielectric Barrier Discharge (SDBD) reactor are investigated to find optimal driving condition with adjusting various parameter. When the high voltage with sine wave form is applied to SDBD source, successive pulsed current waveforms are observed owing to multiple ignitions through the long discharge channel and wall charge accumulation on the dielectric surface. The discharge voltage, total charge between dielectrics, mean energy and power are calculated from measured current and voltage according to electrode gap and dielectric thickness. Discharge mode transition from filamentary to diffusive glow is observed for narrow gap and high applied voltage case. However, when the diffusive discharge is occurred with high applied voltage, the actual firing voltage is always lower than that with low driving voltage. The $Si_3N_4$, $MgF_2$, $Al_2O_3$ and $TiO_2$ are considered for dielectric protection and high secondary electron emission coefficient. SDBD with $MgF_2$ shows the lowest breakdown voltage. $MgF_2$ thin film is proposed as a protection layer for low voltage atmospheric dielectric barrier discharge devices.

A Study on the Design of Discharge Voltage of Discharge Element with Control Electrode (제어전극을 갖는 방전소자의 방전개시전압 설계에 관한 연구)

  • Park, Keun-Seok;Choi, Jun-Woong;Lee, Dae-Dong
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.67 no.11
    • /
    • pp.1512-1516
    • /
    • 2018
  • The power system and control system constantly reveals surge voltage such as switching surge of lighting devices and power conversion devices, operating and stops surge of rotating devices, charge & discharge surge, opening & closing surge of circuit breakers and the like. Such a surge voltages can cause damage or malfunction of the element such as CPU, Memory, semiconductor etc. In the industry, in order to protect the system from the surge voltage, a surge protector with low discharge starting voltage, fast response time, and low capacitance is required, and technical development research for that is ongoing. In this paper, in order to solve the problem of the existing GDT discharge tube not discharging from the transient voltage which is higher than the commercial voltage and lower than the discharge voltage of the discharge element, we have developed a discharge element having the control electrode & control circuit. The discharge element having the control electrode and the control circuit can control the discharge voltage according to the needs of the consumer and can satisfy the requirement of the discharge element and the technology of the surge protector downsizing technology and the surge protection technology. It is judged to be effective for development.

The Analysis of Discharge Distribution due to the Inner Void of Extra High Voltage Cable

  • Kim Tag-Yong;Hong Jin-Woong
    • KIEE International Transactions on Electrophysics and Applications
    • /
    • v.5C no.4
    • /
    • pp.155-160
    • /
    • 2005
  • This paper addresses the discharge characteristics of cross-linked polyethylene according to void by the Weibull function. It analyzes discharge number and amount of discharge using Weibull distribution to identify the inter-relationship between partial discharge and defect. We detected a 10 second discharge. The applied voltage increased by 1 [kV] at discharge inception voltage. As a result, in a no-void specimen, the shape parameter was consistent according to the increase of voltage, whereas, in a void specimen, it increased according to the increase of voltage. As the result, the shape parameter expressed a fixed value at no-void specimen. However, in void specimen, according to increasing voltage shape parameter rapidly increases.

A Study on Degradation Properties of Silicone Cable due to Partial Discharge (부분 방전에 의한 실리콘 케이블의 열화 특성에 관한 연구)

  • Lee, Sung Ill
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.28 no.1
    • /
    • pp.34-39
    • /
    • 2015
  • In this study, the characteristics of partial discharge was measured for the four core silicone cable (0.6/1.0 kV, $1.0SQ{\times}4C$) with insulated part of 15 cm and conductor of 1cm. The following results have been confirmed as a result of this study. When the first line of cable is connected to the positive electrode and the second, third line of cable is connected to the negative electrode, it found that the inception voltage and extinction voltage decreased with increasing the line of negative electrode, and the partial discharge charge quantity(Q) increases, while the number of discharge occurrence has decreased. The inception voltage and extinction voltage of partial discharge has decreased with increasing the degradation rate in the 33%, 67%, 100%. Also, it confirmed that the partial discharge charge quantity(Q) and the number of discharge occurrence has decreased.

The effects of discharge gases in the voltage transfer curve of ac-PDP (ac-PDP의 전압전달특성에 미치는 방전가스의 영향)

  • Son, J.B.;Lee, S.H.;Kim, D.H.;Kim, Y.D.;Cho, J.S.;Park, J.H.
    • Proceedings of the KIEE Conference
    • /
    • 1999.07e
    • /
    • pp.2233-2235
    • /
    • 1999
  • The ac plasma display panel(PDP) is a flat light-emitting gas discharge device. Discharge gases directly take effects to the discharge phenomena of ac PDP. Therefore it is necessary to understand the characteristics of the discharge gases. In this paper, we have studied the effects of discharge gases by voltage transfer curves which show the discharge characteristics of ac PDP and the change of the effective wall capacitance during a discharge which depends on lateral spreading of charge distribution and the strength of discharge. As gas pressure increases, memory margins increases. and the firing voltage of a mixed gas is lower than that of a single gas such as He gas. The minimum sustain voltage and the maximum sustain voltage or firing voltage increases with decrease in the frequency. The effective wall capacitance increases as the discharge strength that is, the gap voltage between discharge electrodes increases.

  • PDF

Characteristic of High Voltage Aging in AC PDPs

  • Lee, Yong-Han;Kim, Oe-Dong;Ahn, Byoung-Nam;Choi, Kwang-Yeol;Kim, Sung-Tae
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2006.08a
    • /
    • pp.932-934
    • /
    • 2006
  • A relationship between discharge delay time and the aging method were investigated: A-Y (Address electrode - Scan electrode) aging and conventional X-Y(Common electrode - Scan electrode) aging with the variation of sustain voltage beyond self-erasing discharge. Although A-Y aging decreases discharge delay time, it has several drawbacks like non-uniformity of discharge, degradation of luminous efficiency and a color temperature. In a conventional aging condition which is carried out near the mid-margin voltage, discharge delay time is short in low voltage and high frequency condition. As an alternative to conventional voltage aging, high voltage aging is suggested which is carried out at self-erasing sustain voltage region. High voltage aging shows lower discharge delay time and fast aging speed than conventional voltage aging.

  • PDF

A Study on Properties of Partial Discharge in Silicone Rubber (실리콘 고무의 부분방전 특성에 관한 연구)

  • Lee, Sung-Ill;Kwon, Young-Cheon
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.24 no.11
    • /
    • pp.890-894
    • /
    • 2011
  • In this thesis, the silicone filler with a sample size of 0~75 phr and void size of 2~4.5 mm is prepared in order to diagnose the defect of void which exists in widely used insulation material, silicone rubber. In this silicone rubber sample, electrodes are connected and whilst the voltage changes, applied voltage 7 kV~9 kV is increased constantly over time and discharge quantity, discharge frequency and applied voltage (T-QNV) were measured. The discharge quantity of the applied voltage (VQ) is measured to estimate inception voltage and extinction voltage. In addition, under the condition of maintaining constant applied voltage, discharge quantity and discharge frequency (QN) are measured, and its characteristics are analyzed.

Ozone Generation Synergy Effects of Three-Phase Voltage Apply Type Superposed Discharge Ozonizer (3상 전압인가형 중첩방전 오존발생기의 오존생성 상승효과)

  • Lee, Byeong-Jun;Lee, Sang-Geun;Song, Hyeon-Jik;Kim, Yeong-Hun;Park, Won-Ju;Lee, Gwang-Sik
    • The Transactions of the Korean Institute of Electrical Engineers C
    • /
    • v.49 no.8
    • /
    • pp.468-476
    • /
    • 2000
  • Nowadays, ozone is mainly utilized for water treatment and home equipments. Although the demand for ozone is increasing, the ozone yield of silent discharge type ozonizer is low. Therefore, it is expected to improve the energy efficiency and ozone yield of an ozonizer. In this paper, a new ozone generation system is proposed. The 60[Hz] three-phase voltage is applied to three-phase superposed discharge type ozonizer(3PSDO) which has three electrodes(central, internal and external electrodes). There is no discharge pause time when three-phase voltage is applied due to 120-degree phase difference of applied voltage. The synergy effect of the three-phase superposed discharge type ozonizer is investigated by comparing with the three sort of single-phase discharge type ozonizer(1PDO). So, three-phase superposed discharge type ozonizer is able to obtain high ozone yield, and optimize discharge space, because this can increase the discharge power at low applied voltage.

  • PDF

A study on the effects of a conducting metallic barrier on the surface creepage flash over discharge (연면방전에 미치는 도전층의 영향에 관한 연구)

  • Sung Kae Chung
    • 전기의세계
    • /
    • v.17 no.3
    • /
    • pp.7-28
    • /
    • 1968
  • When a insulator plate is inserted to the discharge path of a space discharge gap in which the field strength is not uniform, the spark voltage under the atmospheric pressure between the electrodes decreases or rises according to the position of the insulating plate. Also it is reported that if a metallic barrier plate is inserted to the discharge path of the same space discharge gap, similar variations of spark voltage are found. Speaking briefly, mensioned above are the spark voltage characteristics when an insulator or metallic barrier is inserted to the space discharge gap. Also some experimental results, concerning to the surface creepage flash over characteristics at the case when an insulator barrier is inserted to the discharge path of a surface creepage discharge gap, were reported by Peek. But up to now there are no reports on surface flash over voltage characteristics at the case when a metallic barrier is inserted to the surface creepage gap. In this study the effects of a conducting metallic barrier inserted to the path of a surface creepage discharge gap on the flash over voltage characteristics are investigated theoretically and experimentally, and got some important results, clearing the effects of the position and width of a conducting barrier is inserted, the surface flash over voltage characteristics appear as an Inverse N or W Characteristics. Such theoretical or experimental results may have some relation not only with the effects of dry belt and snow on suspension insulators, but also with the effects of dirty zone or water drops on the surface creepage flash over voltage.

  • PDF

Discharge Characteristics of AC-PDPs with a grooved front dielectric layer

  • Jeong, Jin-Hee;Lim, Jong-Lae;Kim, Oe-Dong;Choi, Kwang-Yeol;Yoo, Eun-Ho
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2005.07b
    • /
    • pp.1266-1268
    • /
    • 2005
  • The influence of the grooved dielectric layer on discharge and luminous characteristics has been investigated for various depths of the groove to achieve a high luminance efficiency AC-PDP operated at a lower voltage. We use the voltagethreshold curve technique and address delay jitters to explain the discharge characteristics. It shows that the surface discharge voltage rely on the depth of the grooved dielectric layer. Vertical discharge voltage remains almost the same as the groove depth increases. The influence of the grooved dielectric layer on discharge and luminous characteristics has been investigated for various depths of the groove to achieve a high luminance efficiency AC-PDP operated at a lower voltage. We use the voltagethreshold curve technique and address delay jitters to explain the discharge characteristics. It shows that the surface discharge voltage rely on the depth of the grooved dielectric layer. Vertical discharge voltage remains almost the same as the groove depth increases.

  • PDF