Spiral pulse generator with high voltage and μs long pulse width

AbstractIn this paper, a new technical scheme of high-voltage, long-pulse generator, mostly based on solid-state power devices, including magnetic pulse compressor, Blumlein-type rolled strip pulse-forming line (RSPFL) and inductive voltage adder (IVA), is proposed and investigated numerically and experimentally. The generator has potential advantages of high average power level, high repetitive rate capability, long lifetime, and long pulse achievability, which meet the requirements of military and industrial application of the pulsed power technology. Specifically, a two-stage magnetic pulse compressor was set up with iron-based amorphous cores. Total compression ratio of the device is approximately 12 and the achieved voltage efficiency is up to 92%. Low impedance, long-duration Blumlein-type RSPFL was established with characteristic impendence and electrical length of 3 Ω and 100 ns, respectively. Mylar film was selected as the solid-state dielectric. Increased by a four-stage IVA, typical quasi-square pulse was obtained with peak current of 2.3 kA and duration over 200 ns. As the resistance of the dummy load was measured to be 60 Ω, the peak voltage was approximately 138 kV. Experiments show reasonable agreement with numerical analysis.

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A high power high voltage short pulse width pulse generator using direct drive method in application of modulating-cathode tubes drive

2009 IEEE International Symposium on Industrial Electronics ◽

10.1109/isie.2009.5213118 ◽

2009 ◽

Author(s):

A. Hasanzadeh ◽

S. M. R. Sadriyeh ◽

A. Mohammadi ◽

B. Maghsoudlou ◽

H. Mokhtari ◽

...

Keyword(s):

High Voltage ◽

High Power ◽

Pulse Width ◽

Pulse Generator ◽

Short Pulse ◽

Direct Drive ◽

Short Pulse Width

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Design of a High Voltage Pulse Generator with Large Width Adjusting Range for Tumor Treatment

Electronics ◽

10.3390/electronics9061053 ◽

2020 ◽

Vol 9 (6) ◽

pp. 1053

Author(s):

Xin Rao ◽

Xiaodong Chen ◽

Jun Zhou ◽

Bo Zhang ◽

Yasir Alfadhl

Keyword(s):

High Voltage ◽

Voltage Pulse ◽

Pulse Width ◽

Pulse Generator ◽

Biological Effects ◽

High Voltage Pulse ◽

Tumor Treatment ◽

Capacitor Array ◽

High Voltage Pulse Generator ◽

Voltage Pulse Generator

The unique biological effects stimulated by short pulsed electric field have many applications in tumor treatment, such as irreversible electroporation, electrochemotherapy, gene transfection and immune therapy. These biological effects require high voltage pulses with different pulse width in the range from nanoseconds to hundreds of microseconds. To fulfill this requirement, a compact high voltage pulse generator has been designed based on a switchable capacitor array and a SiC MOSFET switching array. The proposed pulse generator has one output channel with an adjustable pulse width from 100 ns to 100 µs, an amplitude range from 0 kV to 2 kV, a repetition rate less than 1.2 kHz and a voltage drop less than 5%. The mechanism of the stacked switches circuit was investigated, in connection with a switchable capacitor array. The introduction of a switchable capacitor array extends the pulse width from nanosecond scale and microsecond scale compared with other similar design methods. The pulse generator has been designed in simulation and implemented in experiment. The developed pulse generator provides a convenient and economical tool for the further studies of the unique biological effects stimulated by different pulsed electric fields for tumor treatment.

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