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.

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.

Measurement of Resistivity of Silicon Carbide by Discharge Time of Equivalent Capacitance of the Sample

2019 ◽  
Vol 954 ◽  
pp. 60-64
Author(s):  
Xin Wang ◽  
Lei Tian ◽  
Jun Sheng Li ◽  
Shi Jin Wang
Keyword(s):  
High Speed ◽  
Pulse Generator ◽  
Measurement Range ◽  
Discharge Time ◽  
Digital Oscilloscope ◽  
Data Acquisition Card ◽  
High Speed Data Acquisition ◽  
Parallel Circuit ◽  
High Speed Data ◽  
Wideband Gap

According to the Classical Electrical Theory of Capacitor-to-Resistance Discharge, the Sample of Sic can Be Equivalent to a Parallel Circuit of Resistance and Capacitance. due to the High Resistance of the Wideband-Gap Semiconductors and the Long Discharge Time of the Capacitance, the Samples Resistivity can Be Calculated Manually or by Computer by Applying a Pulse Voltage to the Sample and then Accurately Measuring its Discharge Time. the Measuring Equipment Consists of Sample Stage, Pulse Generator, Charge Converter and Digital Oscilloscope. if High-Speed Data Acquisition Card and Industrial Computer are Used Instead of the Digital Oscilloscope, the Measurement Repeatability can Be Better than 1%, and the Measurement Range is within 104-1012 Ω•cm.

Pulse Generator and High-Speed Memory Circuit

1956 ◽  
Vol EC-5 (4) ◽  
pp. 213-218 ◽  
Author(s):  
Z. Bay ◽  
N. T. Grisamore
Keyword(s):  
High Speed ◽  
Pulse Generator ◽  
Memory Circuit

Design and Performance Evaluation of a 10GHz 32nm-CNTFET IR-UWB Transmitter for Inter-Chip Wireless Communication

2013 ◽  
Vol 646 ◽  
pp. 228-234
Author(s):  
Fahim Rahman ◽  
Prodyut Das ◽  
Md. Forhad Hossain ◽  
Sazzaduzzaman Khan ◽  
Rajib Chowdhury
Keyword(s):  
Performance Evaluation ◽  
High Speed ◽  
Pulse Generator ◽  
Field Effect Transistors ◽  
Logic Gates ◽  
Pulse Amplitude ◽  
Building Blocks ◽  
Data Rate ◽  
High Data ◽  
And Performance

In this paper, we have presented the design and performance evaluation of a 10GHz 32nm-CNTFET IR-UWB transmitter for inter-chip wireless transmission. We have designed the transmitter using a VCO-based high speed clock generator and a positive and a negative monocycle Gaussian pulse generator. RF compatible Carbon Nano-Tube Field Effect Transistors (CNTFETs) have been used as the building blocks of the oscillator and the logic gates. The final design has resulted to a 7-channel-SWNT CNTFET-based transmitter for optimum 10GHz data rate with a promising 650mV pulse amplitude and only 1.069mW power consumption with a -32.27dB output. This transmitter can also operate satisfactorily upto 15GHz. The results show promising superiority over existing transmitters regarding high data rate, low power loss and high pulse amplitude.

A shutter pulse generator for high speed camera

2013 ◽  
Vol 30 (2) ◽  
pp. 133-137
Author(s):  
Chunping Liu ◽  
Shuang Li ◽  
Jingzhen Li
Keyword(s):  
High Speed ◽  
Pulse Generator ◽  
High Speed Camera

Micro-Forming Process and Microstructure of Deposit by Using Micro EDM Deposition in Air

2008 ◽  
Vol 375-376 ◽  
pp. 153-157 ◽  
Author(s):  
Zi Long Peng ◽  
Zhen Long Wang ◽  
Bai Dong Jin
Keyword(s):  
High Speed ◽  
Pulse Generator ◽  
Electrical Discharge Machining ◽  
High Speed Steel ◽  
Solidification Process ◽  
Pulse Interval ◽  
Tool Electrode ◽  
Micro Edm ◽  
Forming Process ◽  
Long Pulse

Based on analysis of the mechanism of Electrical Discharge Machining (EDM) and the characteristics of deposition processing, the processing conditions of micro EDM Deposition (micro EDD) are determined. Micro EDD is a new EDM method taking air as machining medium, using narrow pulse width, long pulse interval, low discharge current and connecting the tool electrode with the anode of pulse generator. Using EDM shaping machine and brass, tungsten and steel as tool electrode respectively, micro cylinders are deposited on high-speed steel surface. And then the microstructure of deposit is analyzed detailedly. Results show that elements of the deposited material distribute uniformly, whose components depend on the tool electrode material. As the high cooling rate of the solidification process, the deposit grain size refines obviously, which leads to the hardness of tungsten or steel deposit increasing. Moreover, the Metallurgical bonding has occurred on the interface between deposit and high-speed steel base, whose thickness is about 5μm.

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