Study on the Process of Rock Fragmentation by High …

Abstract: Rock fragmentation by high-voltage pulse discharge (rock fragmentation by high-voltage pulse discharge, RFHD) is a potential, new and efficient …

Strengthening the magnetic separation characteristic of …

In the present paper, high-voltage pulse discharge (HVPD) was proposed to enhance the separation characteristic of magnetite quartzite. The technical indicators of concentrate grade 61.76% and recovery 83.26% were obtained at pulse number 90, loading voltage 35 kV, and grinding time 9 min. The liberation of breakage products was …

Research on High Voltage Pulse Ice-Breaking …

The high voltage pulse acts on the ice accumulation covering on transmission lines, breaking down the ice from the inside, forming a high pressure, high temperature ... tions, the bubbles in the ice will be broken down, and the closer the bubbles are to the ice surface, the easier the bubbles will be broken down. The electric field inside

Sydor High Voltage Pulse Generator

Amplitude adjustable up to 10 kV and pulse widths from 10 - 100 nS. Sydor High Voltage Pulse Generator. Looking for a replacement for your aging Bournlea 3148 Thyratron pulser? Look no further! Sydor has single channel or 3 channel units for driving Pockels cells, Rf testing and more. Amplitude adjustable up to 10 kV and pulse widths from 10 ...

High Voltage Pulser Circuits

High voltage, high speed, and high current pulses at low duty cycles are usually required in applications such as medical ultrasound imaging, B-scan ultrasound, material ... +PULSE-PULSE +10V FB ENAB DAMP DAMP +10V Supertex MD1213 Supertex MD1213 10nF Supertex TC6320 Supertex TC6320 0.1µF OE INA INB GND OUTA OUTB VDD1 …

Effect of the electrode spacing on dynamic fracture behavior …

Previous studies found that when rock is broken by HVPD, the pulse voltage first acts on the high and low-voltage electrodes, and a fine discharge leader is formed inside the rock near the high-voltage electrode, whose trunk extends continuously and reaches the low-voltage electrode, thus forming a through plasma channel [16, 17]. …

| High Voltage Pulse Generator

HIGH VOLTAGE PULSE GENERATOR. Many applications require a high voltage, high current, pulse generator to drive a low impedance load such as a transducer or a laser. PulseGen is a low cost solution to this requirement. ULTIMATE FLEXIBILITY. All aspects of the pulse waveform are programmable, frequency, voltage, delay, and the number of …

The plasma path development model (PPDM) in rocks

After multiple discharges, the rock will be broken [7, 9]. This indicates that the distribution characteristics of the plasma path determine the distribution characteristics of stresses within the rock, and are closely related to the crushing efficiency of HPDT. ... the high-voltage pulse output by the pulse power supply is loaded onto the high ...

On the Mechanism of High-Voltage Pulsed Fragmentation …

Growth Mechanism of Three-Dimensional Plasma Channels in High-Voltage

High-voltage electric pulse rock-breaking technology has the potential to improve drilling speed significantly. Numerous mechanism studies and laboratory experiments have laid the foundation for developing high-voltage electric pulse rock-breaking technology. However, the mechanism of medium ion channels growing in three …

High-Voltage Pulse Generators

EHT pulse generators are designed to provide precision control over the output waveform to enable process optimization for research and industrial customers. These units have an isolated/floating output and can be biased with respect to the load or grounded. They have been designed to drive plasma loads for medical devices, basic research, and …

The partial electrical breakdown mechanism by high voltage …

1. Introduction. High-voltage electric pulse (HVEP) drilling technology stands out for its high rock breaking efficiency, good well bore quality, green environmental protection, easy control of the rock breaking process, and the drilling cost is not limited by the drilling depth, which has huge development potential, regarded as an emerging …

High Voltage Pulse Generators

Directed Energy has high voltage pulse generators designed for high voltage and precision applications. Instruments, standard modules & OEM modules available. Skip to content +1 (415)-453-9955 …

Impedance in the Diagnosis of Lead Malfunction

We review determinants of impedance, how it is measured, variation in clinically measured pacing and high-voltage impedance and impedance trends as a diagnostic for lead failure and lead-device …

Concrete crushing based on the high-voltage pulse discharge technology

High-voltage pulse discharge (HVPD) technology has a broad prospect in concrete crushing. ... and broken. Therefore, this method has a good application prospect in the demolition engineering of concrete structures. In the mid-20th century, the former Soviet Union used the principle of hydroelectric effect to dismantle concrete foundation, ...

Electrode structural effects on the mechanism of high-voltage pulse …

High-voltage electric pulse rock breaking is based on the principle of liquid electric effect (Yu et al., 2022).At present, most of the high-voltage electric pulse breaking technologies focus on the in-depth study of the rock-breaking mechanism, and to analyze the formation principle of the discharge channel in different solid media (Boev et al., …

PVX-4110 10 kV Bipolar Pulse Generator

The PVX-4110 high voltage pulse generator is a direct coupled, air cooled, solid state half-bridge (totem pole) providing 0 to ±10,000 V Pulse Output, <60ns Rise and Fall Times and up to 10kHz Pulse Repetition Frequency for driving deflection plates, grids, Pockels Cells and other high-impedance capacitive loads.

High Voltage Pulse Generators | Berkeley Nucleonics …

The PVX-4000-2kV is a high voltage pulse generator designed for high impedance capacitive loads and offers the choice between an internal or external power supply option. This unit offers a 0 V to ±2000 V settable output voltage and 2% to 98% duty cycles. With the internal source PVX-4000-2kV, 40 Hz to 30,000 Hz repetition rates are supported.

Preferential sequence crushing of copper ore based upon high-voltage …

The advantages of high voltage pulse crushing were reflected in many cases. In this work, high voltage pulse technology is used to break copper iron ore to separate specific mineral components under different operating conditions, and to break minerals in a particular sequence to realize stepwise mineral enrichment. 2. …

Effects of electrical stimulation on skin surface

The transmission frequency (1–4 Hz but the internal frequency of the waveform is high, pulse width 100–250 μs, high intensity) and hyperstimulation (1–4 Hz, 10–500 ms pulse width, high intensity) . Its analgesic principle is to promote the release of pain-relieving drugs in the body and its direct effect on neural sensation.

The Fragmentation Mechanism of Heterogeneous …

The ner the grain size of granite, the smaller the broken ratio coecient, and the better the crushing degree of HVEP. There is almost no dierence in the energy eciency of HVEP between granites ... (Li et al. 2018, 2019) established a high-voltage electrical pulse rock-breaking system and based on Kratel cylindri-cal channel model (Kratel 1996 ...

Electrode structural effects on the mechanism of high-voltage pulse …

At present, most of the high-voltage electric pulse breaking technologies focus on the in-depth study of the rock-breaking mechanism, and to analyze the formation principle of the discharge channel in different solid media (Boev et al., 1997; Lee, 1954), the pulse voltage is applied on the surface of the granite and concrete specimens.

A Quickly-Hacked-Together Avalanche Pulse Generator

Fortunately they're a very simple circuit with only one 2N3904 transistor, but the snag is they need a high voltage power supply well over 100 V. So the challenge isn't making the pulse ...

Mechanism Analysis of Rock Failure Process under High-Voltage

This work aims to investigate and analyse the mechanism of rock failure under high-voltage electropulses in order to evaluate and increase the efficiency of high-voltage pulse technology in geological well drilling, tunnel boring, and other geotechnical engineering applications. To this end, this paper discusses the equivalent circuit of …

A novel and efficient method for resources recycling in …

The particle size enrichment effect was found when the photovoltaic panel was broken by high voltage pulse. • The stripping sequence of photovoltaic panel components during high voltage pulse crushing was investigated. • The Silver in photovoltaic panels can be effectively enriched and recovered by high voltage pulse …

Electrode structural effects on the mechanism of high …

In this paper, focusing on heterogeneous granite formations, we investigate high-voltage pulse breaking patterns by adjusting electrode structural parameters, …

Tachycardia

Rapid pulse. Shortness of breath. When to see a doctor. Many things can cause tachycardia. If you feel like your heart is beating too fast, make an appointment for a health checkup. ... High or low blood …

Study on the Process of Rock Fragmentation by High-Voltage Pulse …

Rock fragmentation by high-voltage pulse discharge (rock fragmentation by high-voltage pulse discharge, RFHD) is a potential, new and efficient drilling technology. The RFHD platform is established to study the relationship between voltage characteristics and discharge path distribution in typical liquid-rock composite media. Based on the …

Study on Effect of High Voltage Pulse Electrode Spacing on Broken

In order to study on effect of high voltage pulse electrode spacing on broken concrete physical performance, through four electrode spacing in the concrete crush test, analysis of electrode ...

Experimental Investigation on Rock-Breaking by High-Voltage …

Abstract. Deep drilling and tunnel excavation rely on new rock-breaking technology. Currently, there is a lack of research on the micro mechanism of high-voltage electro-pulse boring (EPB). The design structure of the electrode bit is diverse, and there is still a great room for improving the service life of the electrode bit, the quality of the …

High Voltage Pulse Generators, Pulsed Laser …

Directed Energy provides pulsed power solutions including pulsed laser diode drivers and high voltage pulse generators to customers around the world. Skip to content +1 (415)-453-9955 info@berkeleynucleonics.

The partial electrical breakdown mechanism by high voltage …

Introduction. High-voltage electric pulse (HVEP) drilling technology stands out for its high rock breaking efficiency, good well bore quality, green environmental protection, easy control of the rock breaking process, and the drilling cost is not limited by the drilling depth, which has huge development potential, regarded as an emerging …

An Experimental and Numerical Study on the …

of High‑Voltage Electro Pulse Rock‑Breaking Jifeng Kang1 · Changping Li2 · Longchen Duan1 · Yibiao Xiao 1 · Ao Li1 Received: 15 February 2022 / Accepted: 8 November 2022 / Published online: 27 November 2022 ... broken down when the energy was large enough (Andres et al. 2001a, 2001b; Boev et al. 1997). Burkin et al. (2009a, b) estab-

The Dynamic Fracture Process in Rocks Under High-Voltage Pulse

High-voltage pulse technology has been applied to rock excavation, liberation of microfossils, drilling of rocks, oil and water stimulation, cleaning castings, and recycling products like concrete and electrical appliances. In the field of rock mechanics, research interest has focused on the use of high-voltage pulse technology for drilling and cutting …

Research on High Voltage Pulse Ice-Breaking Technology

This paper presents a high voltage pulse ice-breaking technique. The high voltage pulse acts on the ice accumulation covering on transmission lines, breaking …

A Programmable High-Voltage Pulse Transmitter Circuit for …

This paper introduces a high-voltage pulse transmitter circuit, designed to drive an array of transducers in a 3-D ultrasonic imaging system. The high-voltage pulser in this circuit adopts a push-pull structure to reduce static power consumption, while using a floating-gate bootstrap transistor for isolation to ensure that the pulser does not break down at high …