High-Power Pulse Generator With Flexible Output Pattern

Abstract

This paper presents a high-voltage bipolar rectangular pulse generator using a solid-state boosting front-end and an H-bridge output stage. The topology generates rectangular pulses with fast enough rise time and allows easy step-up input voltage. In addition, the circuit is able to adjust positive or negative pulsewidth, dead time between two pulses, and operating frequency. The topology can also be controlled to produce unipolar pulses and other pulse patterns without changing its configuration. With an appropriate dc source, the output voltage can also be adjusted to requirements of different applications. The intended application for such a circuit is algal cell membrane rupture for oil extraction, although additional applications, include biotechnology and plasma sciences, medicine, and food industry. A 1 kV/200 A bipolar solid-state pulse generator was fabricated to validate the theoretical analysis presented in this paper. In addition, to validate the analysis with simulations and prototype tests, biological test were conducted in order to examine the technical value of the proposed circuit. These evaluations seem to suggest that oil production rate from bipolar pulses may double that of an equivalent process with unipolar pulses.

High‐speed high‐voltage solid‐state Marx generator based on SiC MOSFETs

“…The Marx topology-2 presented in Figure 1b avoids this issue by replacing half of the charging diodes with active solid-states switches [4][5]. In some studies, the diodes in question are replaced with an inductor, which increases volume and charging time [6].…”

“…In some studies, a combination of series and parallel switches have been implemented to make highvoltage, high-current, switch modules and consequently reduce the number of stages required [5]. Table 1 summarises the state of the art in solid-state Marx generator development in recent years [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. 1, our Marx generator is capable of producing shorter pulses with higher voltage, with the exception of the design presented in [17].…”

“…In some studies, a combination of series and parallel switches have been implemented to make high‐voltage, high‐current, switch modules and consequently reduce the number of stages required [5]. Table 1 summarises the state of the art in solid‐state Marx generator development in recent years [3–17]. Table 1 compares output voltage, output current, pulse width, repetition rate, input voltage, number of stages, topology type, semiconductor type and number of switches in series for different Marx generators.…”

A Wide-Frequency Constant-Amplitude Transmitting Circuit for Frequency Domain Electromagnetic Detection Transmitter

“…Based on the idea of high voltage clamping, [5,6] proposed a method to control the turn-off time and improve the slope of the front and rear edges of the current by adjusting the voltage of the clamping voltage source. In [7], the solid-state DC/DC boost front-end and h-bridge output are used to achieve the purpose of rapid current rise. In order to realize the output current steep pulse, literatures [8] and [9] respectively put forward the method of using high-voltage dc power supply and increasing boost charging circuit to charge capacitor during pulse current commutation.…”

High-power bipolar multilevel pulsed electroporator

“…However, due to the absence of instrumentation, few experimental measurements have been reported [22,23] and these were limited by the pulse generation flexibility.…”