scholarly journals High Speed Light Pulse Generator Using a Superbright LED

1996 ◽  
Vol 32 (3) ◽  
pp. 306-312
Author(s):  
Eiichi MIYAZAKI ◽  
Kensho OKAMOTO
Keyword(s):  
Light Pulse ◽  
High Speed ◽  
Pulse Generator

A New High Speed Pulse Generator with Series Connected Output

2005 ◽  
Author(s):  
G. H. Rim ◽  
B. D. Min ◽  
E. Pavlov ◽  
J. H. Kim ◽  
J. W. Baek
Keyword(s):  
High Speed ◽  
Pulse Generator

Research on Energy-Saving EDM Pulse Power Supply

2008 ◽  
Vol 375-376 ◽  
pp. 714-718
Author(s):  
Yu Kui Wang ◽  
Bo Yan Song ◽  
Zhen Long Wang ◽  
Wan Sheng Zhao
Keyword(s):  
Energy Saving ◽  
Power Factor ◽  
Power Supply ◽  
High Speed ◽  
Closed Loop ◽  
Pulse Generator ◽  
Electrical Discharge Machining ◽  
Pulse Power ◽  
Electrode Wear ◽  
Pulse Power Supply

The performance and stability of output of electrical discharge machining (EDM) are determined by the output of EDM pulse power supply. In order to resolve disadvantages of conventional pulse power supply, such as undesirable efficiency and low power factor, the prototype design of energy-saving EDM pulse power supply is developed. It is composed of such three stages as a single-phase active power factor correction (PFC) pre-regulator, a full-bridge phase shift zero voltage switching (FB-PS-ZVS) converter based on complex control paralleled of machining current closed-loop and voltage closed-loop at period of spark gap insulation, and a pulse generator based on machining sequence control. The PFC pre-regulator contributes to a great increase to about 0.95 in its power factor. The efficiency of the new system is considerably increased to about 70% due to design of ZVS. The pulse generator contributes to the pulse machining current without a tail. Experiment results demonstrates that the prototype is capable of low electrode wear, high speed, stable machining.

Photomultiplier resolving time measurements utilizing a light pulse generator

1966 ◽  
Vol 44 (2) ◽  
pp. 309-313 ◽  
Author(s):  
D. Porter ◽  
J. McDonald ◽  
D.T. Stewart
Keyword(s):  
Light Pulse ◽  
Pulse Generator

scholarly journals Investigation on Deformation of DP600 Steel Sheets in Electric-pulse Triggered Energetic Materials Forming

2021 ◽  
Author(s):  
Xueyun Xie ◽  
HaiPing Yu ◽  
Yang Zhong
Keyword(s):  
Plastic Strain ◽  
Energetic Materials ◽  
Strain Distribution ◽  
High Speed ◽  
Pulse Generator ◽  
Electric Pulse ◽  
Chemical Energy ◽  
Discharge Characteristics ◽  
Triggering Process ◽  
Action Stage

Abstract Electric-pulse triggered energetic materials forming (ETEF) is a high-speed manufacturing process, which utilizes the chemical energy released by energetic materials (EMs) triggered by underwater wire discharge to plastically shape metals. The understanding of ETEF is not comprehensive, especially in the research on the discharge characteristics of energetic materials triggered by metal wires and the deformation process of metal sheets. In this paper, the above two problems were studied by means of experiment and numerical simulation. For the pulse discharge characteristics, the peak values of voltage and current were reduced during the triggering process of energetic materials. The triggering energy consumption of energetic materials was quantified to be about 200J. The matching parameters of different capacitor-voltage devices had no effect on triggering the energy release of energetic materials, so the electric pulse generator only played a triggering role on energetic materials. Compared with the quasi-static specimen with the same bulging height, the maximum major strain and thinning rate of the bulged specimen under ETEF condition were significantly reduced, and the deformation uniformity and strain distribution of the specimen were improved. The simulation results showed that the addition of energetic materials significantly improved the plastic strain energy of the blank. The deformation of the blank in ETEF can be divided into two stages: the initial chemical energy action stage and the inertia action stage. The bulging height of sheet metal increased by nearly 301% in inertia action stage, accounting for 80% of the total deformation time, and the effective plastic strain distribution was more uniform.

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