scholarly journals METHODS OF ADJUSTING FORMING LINES USING A LOW VOLTAGE THYRISTOR SWITCH

2021 ◽  
pp. 135-138
Author(s):  
O.I. Kosoi ◽  
V.O. Mats ◽  
V.V. Mytrochenko ◽  
V.Yu. Titov ◽  
Yu.D. Tur ◽  
...  
Keyword(s):  
High Voltage ◽  
Voltage Pulse ◽  
Low Voltage ◽  
Operating Mode ◽  
High Voltage Pulse ◽  
Fine Tuning ◽  
Operating Voltage ◽  
Thyristor Switch ◽  
Pulse Modulator ◽  
Optimal Value

A method of adjusting the generating lines of a high-voltage pulse modulator with a thyristor switch at a charg-ing voltage of 150 V is given. The degree of pre-distortion is determined to obtain in the operating mode (60 kV) a voltage pulse with the required non-uniformity at the optimal value of the degaussing current of the trans-former. An element of fine tuning of forming lines at operating voltage is developed and applied.

Implementation of a High Voltage Pulse Modulator with Low Voltage Ripple and Fast Switching Characteristics

2012 ◽  
Vol 9 (1) ◽  
pp. 466-471
Author(s):  
Hung-Liang Cheng ◽  
Chien-Hsuan Chang ◽  
Chun-An Cheng ◽  
Chin-Wen Chuang
Keyword(s):  
High Voltage ◽  
Voltage Pulse ◽  
Low Voltage ◽  
High Voltage Pulse ◽  
Fast Switching ◽  
Voltage Ripple ◽  
Pulse Modulator ◽  
Switching Characteristics

Calcium influx determines the muscular response to electrotransfer

2012 ◽  
Vol 302 (4) ◽  
pp. R446-R453 ◽  
Author(s):  
Pernille Hojman ◽  
Camilla Brolin ◽  
Hanne Gissel
Keyword(s):  
Cell Membrane ◽  
High Voltage ◽  
Voltage Pulse ◽  
Low Voltage ◽  
Calcium Influx ◽  
High Voltage Pulse ◽  
Electric Pulses ◽  
Tnf Α ◽  
Cell Membrane Permeabilization ◽  
The Times

Cell membrane permeabilization by electric pulses (electropermeabilization), results in free exchange of ions across the cell membrane. The role of electrotransfer-mediated Ca2+-influx on muscle signaling pathways involved in degeneration (β-actin and MurF), inflammation (IL-6 and TNF-α), and regeneration (MyoD1, myogenin, and Myf5) was investigated, using pulse parameters of both electrochemotherapy (8 HV) and DNA delivery (HVLV). Three pulsing conditions were used: 8 high-voltage pulses (8 HV), resulting in large permeabilization and ion flux, and a combination of one high-voltage pulse and one low-voltage pulse (HVLV), either alone or in combination with injection of DNA. Mice and rats were anesthetized before pulsing. At the times given, animals were killed, and intact tibialis cranialis muscles were excised for analysis. Uptake of Ca2+ was assessed using 45Ca as a tracer. Using gene expression analyses and histology, we showed a clear association between Ca2+ influx and muscular response. Moderate Ca2+ influx induced by HVLV pulses results in activation of pathways involved in immediate repair and hypertrophy. This response could be attenuated by intramuscular injection of EGTA reducing Ca2+ influx. Larger Ca2+ influx as induced by 8-HV pulses leads to muscle damage and muscle fiber regeneration through recruitment of satellite cells. The extent of Ca2+ influx determines the muscular response to electrotransfer and, thus, the success of a given application. In the case of electrochemotherapy, in which the objective is cell death, a large influx of Ca2+ may be beneficial, whereas for DNA electrotransfer, muscle recovery should occur without myofiber loss to ensure preservation of plasmid DNA.

scholarly journals ASSESSMENT OF ENERGY EFFICIENCY OF HIGH-VOLTAGE LUE MODULATORS

2020 ◽  
pp. 49-52
Author(s):  
O.I. Kosoy ◽  
V.O. Matz ◽  
V.P. Romasko ◽  
Yu.A. Titarenko ◽  
V.Yu. Tytov ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
High Voltage ◽  
Voltage Pulse ◽  
High Voltage Pulse ◽  
Pulse Transformer ◽  
Pulse Modulator

An assessment of the energy efficiency of pulse modulators of technological accelerators at the NSC KIPT. The influence of the parameters of a pulse transformer on a voltage pulse at a load is investigated. The possibilities of increasing the energy efficiency of plants are considered. Studies of losses in high-voltage pulse modulator systems were conducted and it was shown that the main elements that require replacement or improvement are forming lines and pulse transformers.

Design of a Two Levels Self-Integrating Capacitive Divider

2014 ◽  
Vol 599-601 ◽  
pp. 882-886
Author(s):  
Bao Feng Cao ◽  
Jiang Bing Fan ◽  
Li Jun Song ◽  
Xue Qin Zhang ◽  
Xin Li ◽  
...  
Keyword(s):  
High Voltage ◽  
Voltage Pulse ◽  
Low Voltage ◽  
Voltage Divider ◽  
High Voltage Pulse ◽  
Pulse Source ◽  
Voltage Level ◽  
Capacitive Divider ◽  
Capacitive Voltage ◽  
Capacitive Voltage Divider

A ims . A kind of two levels self-integrating capacitive voltage divider is designed to online measure high voltage nanosecond pulse. Methods. The circuit principle of capacitive divider is analyzed, and the theoretical voltage ratio is calculated. The calibration is carried out by using a low voltage pulse source. The divider with a primary voltage divide ratio 601 has been tested to frequency response exceed 1GHz. The second voltage divide ratio can be set flexibly using different ratio attenuators according to the different voltage level of the source. Result. Finally, this divider is used in measuring 600kV high voltage pulse source, and the experimental results show that the present coaxial capacitive divider is reliable and satisfactory for the measuring requirement in time domain and frequency domain.

Resistive Divider with Mid-Electrode for Nanosecond High-Voltage Pulse Measurement

2013 ◽  
Vol 718-720 ◽  
pp. 1083-1087
Author(s):  
Jing Liang Chen ◽  
Tian Yu Lin ◽  
Dong Qiao Bai ◽  
Xue Ling Yao
Keyword(s):  
High Voltage ◽  
Voltage Pulse ◽  
Low Voltage ◽  
Response Characteristic ◽  
High Voltage Pulse ◽  
Step Response ◽  
Large Power ◽  
Pulse Measurement ◽  
Resistive Divider ◽  
The One

Resistive dividers have been widely applied in the field of high voltage pulse measurement because of its simple structure, fast response, large power and low distortion rate [1], but measurement inaccuracy is usually coming when the rise time of pulses is less than 10ns. In the article the effects on the response characteristic are investigated theoretically and experimentally and it puts forward a solution that a mid-electrode is joined to transform the distributed capacitance into the one from high voltage side to mid-electrode and the one from mid-electrode to earth in series connection. A new resistive divider with mid-electrode is designed with high voltage side of 10.2kΩ, low voltage side of 10.01Ω and ratio of 1061.86. It is revealed that the divider has excellent response characteristic with the step response time of less than 1.6ns and the measurement uncertainty of less than 1%.

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