High-voltage high-frequency converter for resistive load with unpredictable variation

This paper is focused on a design of a high-voltage (HV) generator, which is proposed for a high-frequency irreversible electroporation (H-FIRE). The generator produces bursts of bipolar symmetrical pulses. Most HV sources used for cell electroporation are based on a controlled discharge of a capacitor into a resistive load. This solution is very simple, but it is associated with a certain risk of an uncontrolled discharge of the capacitor. We present a different type of the generator, where a DC-AC inverter with pulse transformer is used and where the mentioned risk is eliminated. Our generator is able to deliver bursts with variable length from 50 to 150 μs and a gap between bursts can be set from 0.5 to 1.5 s. Pulse frequency can be varied from 65 to 470 kHz and the output voltage is controlled in two ranges from 0 to 1.3 kV or from 0 to 2.5 kV. Results are presented with resistive load and with tissue impedance load.

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A High-Frequency High-Voltage Excitation Melting Ice Power Design

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.325-326.271 ◽

2013 ◽

Vol 325-326 ◽

pp. 271-276 ◽

Cited By ~ 1

Author(s):

Yu Sheng Zhou ◽

Long Zeng ◽

Pei Yao Chen ◽

Zheng Pan

Keyword(s):

High Voltage ◽

Transmission Lines ◽

High Frequency ◽

Frequency Conversion ◽

Control Method ◽

Frequency Converter ◽

Electric Energy ◽

Notch Filter ◽

Excitation Power ◽

Conversion Function

High-frequency and high-voltage excitation melting ice device is mainly composed of the excitation power supply and the notch filter device, which can realize the power transmission line melting ice without power cut. This paper applied power electronic frequency conversion technology to design a excitation melting ice device with 18KV/40KHZ.This device is adopted PWM control technology, and is mainly composed of the rectifier, controller and inverter. For the small frequency converter, the high-voltage frequency conversion function can be achieved through each phase in series divided voltage method. According to the 1000 kV AC ultrahigh voltage transmission lines, a melting ice model is set up by using SIMULINK simulation. The results show that this device can generate stable 18KV/40KHZ excitation melting ice electric energy in 30ms,and the control method is convenient and simple, the range of frequency and voltage modulation is big characteristics.

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Analysis and Design of 3.3 kV IGBT Based Three-Level DC/DC Converter with High-Frequency Isolation and Current Doubler Rectifier

Scientific Journal of Riga Technical University Power and Electrical Engineering ◽

10.2478/v10144-009-0022-2 ◽

2009 ◽

Vol 25 (25) ◽

pp. 103-108

Author(s):

Dmitri Vinnikov ◽

Tanel Jalakas ◽

Indrek Roasto

Keyword(s):

High Voltage ◽

High Frequency ◽

Power Converter ◽

Rolling Stock ◽

Analysis And Design ◽

Auxiliary Power ◽

Igbt Modules ◽

Isolation Transformer ◽

New Generation ◽

Generation Power

Analysis and Design of 3.3 kV IGBT Based Three-Level DC/DC Converter with High-Frequency Isolation and Current Doubler RectifierThe paper presents the findings of a R&D project connected to the development of auxiliary power supply (APS) for the high-voltage DC-fed rolling stock applications. The aim was to design a new-generation power converter utilizing high-voltage IGBT modules, which can outpace the predecessors in terms of power density, i.e. to provide more power for smaller volumetric space. The topology proposed is 3.3 kV IGBT-based three-level neutral point clamped (NPC) half-bridge with high-frequency isolation transformer and current doubler rectifier that fulfils all the targets imposed by the designers. Despite an increased component count the proposed converter is very simple in design and operation. The paper provides an overview of the design with several recommendations and guidelines. Moreover, the simulation and experimental results are discussed and the performance evaluation of the proposed converter is presented.

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