Novel principle of transient high-voltage generation

Fitch, R.A.; Howell, V T S

doi:10.1049/piee.1964.0139

Cited by 64 publications

(12 citation statements)

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“…The principles of Vector Inversion Generators have been extensively reported in the literature [7,8,9]. For this work, based on studies by Shkuratov et al [ 5 ] we decided to build a VIG with a few nanofarads capacitance.…”

Section: A Vector Inversion Generatormentioning

confidence: 99%

Ultra-compact high efficiency multi-kilovolt pulsed power source

Roberts

Shotts

Rose

2009

2009 IEEE Pulsed Power Conference

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Single shot, high power, high energy pulsed electrical sources have been investigated over the years. Research has encompassed high energy/high power devices such as magnetic flux compression generators (MCG), as well as high power but lower energy devices like Ferroelectric generators (FEG) and ferromagnetic generators (FMG). In this paper, we will discuss recent experiments aimed at producing a pulsed electrical system consisting of a FEG, resonant energy transfer element, high speed switching, a Vector Inversion Generator (VIG) configurable as an oscillator, and a means to combine them into an efficient system that delivers maximum energy to a load at voltages in excess of 100 kV. In its final embodiment, the pulse generator will be on the order of 1.5 inches in diameter and approximately 8 inches long and capable of delivering a fast high voltage pulse (~ 9ns rise time, 200 kV) at energy levels of "joules" to the load. In this paper, we will describe recent experiments to develop resonant energy transfer from the FEG to the VIG at high efficiency, the development of explosive/dielectric switching at kilovolt levels, and the explosive testing of prototype FEG/VIG configurations that constitute laboratory prototypes sufficient for modeling and simulation. In addition preliminary data showing high frequency oscillation for the FEG/VIG configured as an oscillator will be presented and analyzed in terms of possible antenna configurations and breakdown issues.

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Section: A Vector Inversion Generatormentioning

confidence: 99%

Ultra-compact high efficiency multi-kilovolt pulsed power source

Roberts

Shotts

Rose

2009

2009 IEEE Pulsed Power Conference

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“…The on state impedance of the switch is usually negligible. Figure 2 shows the effect of switch transition time, or turn-on, adapted from reference [4]. As can be seen from the above, if the VIG rise time is on the order of the collapse time for the impedance of the switch, the efficiency is totally dominated by the losses in the switch.…”

Section: B E Switch Lossesmentioning

confidence: 99%

“…Effect of switch turn-on time on the efficiency of a VIG[4]. W is the two-way transit time for the propagating wave in the VIG.…”

mentioning

confidence: 99%

Limits and failure modes in high voltage Vector Inversion Generators

Shotts

Roberts

Rose

2009

2009 IEEE Pulsed Power Conference

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VIGs consist of two parallel plate transmission lines, wound on a mandrel and sharing a common conductor. They are a compact electrostatic energy storage device that can convert the stored energy into a traveling RF wave in a one component-one step process. In this paper, basic design equations that allow determination of the VIG erection time, the amount of energy stored in the unit, the amount of energy available at the output of the device and the restrictions on the value of the load impedance necessary for efficient energy transfer are discussed. We describe a method for determining the maximum current, I, and dI/dt that the two switches, low voltage input and high voltage output switch to the load, will see and the constraints imposed on the unit by these parameters. While the above parameters can be uniquely specified, great care must be taken in materials selection, precision winding technique, and insulation scheme to realize a unit that performs to its full potential. The limits on VIG technology as imposed by fundamental processes are discussed.

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“…3, which uses a gas switch (such as a thyratron tube) and eliminates the need of conventional capacitors and pulse transformers. This circuit design is a version of the common voltage inversion generator called stacked Blumlein line generator proposed by Fitch and Howell [13], where pulse forming lines (made of striplines or coaxial cables) are charged in parallel and discharged in series to produce the high voltage pulse across the load. Fig.…”

Section: Pulsed Power Modulator Circuit Configurationsmentioning

confidence: 99%

Pulsed power modulators for surface treatment by plasma immersion ion implantation

Rossi¹,

Ueda²,

Barroso³

2004

Braz. J. Phys.

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The treatment of surfaces by plasma immersion ion implantation requires pulsed power modulators to provide negative high voltage pulses. To achieve this requirement, we have developed three basic circuit configurations in our laboratory: pulse forming network (PFN), hard-tube pulser (HT) and Blumlein line. In this paper we discuss these three types of circuit topologies.As experimental results, first we present the voltage/current characteristic waveforms of PFN and HT pulsers in the PIII treatment of different materials (aluminum, silicon and stainless steel) as well we describe the surface characterization of the materials thereof treated.And finally,we show recent high voltage tests of a high voltage Blumlein pulser (150kV/300A/1µs) to be used in surface treatments of polymers and aluminum alloys.

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Novel principle of transient high-voltage generation

Cited by 64 publications

References 1 publication

Ultra-compact high efficiency multi-kilovolt pulsed power source

Ultra-compact high efficiency multi-kilovolt pulsed power source

Limits and failure modes in high voltage Vector Inversion Generators

Pulsed power modulators for surface treatment by plasma immersion ion implantation

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