Stanislaw Kalisiak

Power Systems of Plasma Reactors for Non-Thermal Plasma Generation

Abstract Recently, many different plasma sources are being investigated for exhaust gases treatment, odor abatement, VOC removal, soil conditioning, surface decontamination or tissue disinfection and sterilization. Among many different plasma reactors investigated in laboratories, gliding arc discharges (GAD), dielectric barrier discharges (DBD), pulsed discharges (PD), atmospheric pressure glow discharges (APGD) and atmospheric pressure plasma jets (APPJ) seem to be the most promising for high pressure low temperature applications. They can be designed as multi-electrodes’ high power system that can be used in environment protection processes, like decontamination of large surfaces and treatment of large volume of polluted gases, as well as small size and low power devices for biomedical applications, like plasma healing, disinfection and sterilization. Paper presents review of power supply systems for cold plasma reactors. Dielectric Barrier Discharge (DBD), Gliding Arc Discharge (GAD) and atmospheric pressure plasma jet (APPJ) reactors with their supply systems have been discussed from the point view of their characteristics, possibility to control power to the discharge and efficiency. Taking into account the plasma reactor characteristics and nature (nonlinear resistive and/or capacitive) different solutions of power suppliers have been presented: transformer type, AC/DC/AC inverter, RF-frequency system and frequency resonant inverter.

High Voltage Pulse Generator Using Transformer Parasitic Components for Pulsed Corona Discharge Generation

This paper proposes a new topology of a nanosecond, high voltage pulse generator devoted to pulsed corona discharge (PCD) reactor supply. The proposed topology is based on solid state, semiconductor switches and uses parasitic components of transformers. A prototype construction of the proposed generator loaded with a PCD reactor with 6.4-pF capacitance is able to generate high voltage pulses with maximum amplitude of 14 kV (using 5.4-kV supply and up to six modules of proposed topology, each equipped with a MOSFET transistor with 1-kV blocking capability) with voltage steepness of 730 V/ns. Obtained pulses are 65-ns long. The peak power delivered to the PCD reactor is > 0.3 MW while the energy consumed reaches 7 mJ/pulse. This paper also compares two different mechanical constructions of such generators and gives an overview of analytical and numerical voltage waveform analyzes.

Experimental Results of a Combined DBD Reactor-Catalyst Assembly for a Direct Marine Diesel-Engine Exhaust Treatment

This paper gives an overview of a robust dielectric barrier discharge reactor-catalyst construction used in a bypass of a marine diesel-engine exhaust gas system. Electrode arrangement, housing, and electrode positioning systems are discussed allowing for high temperature and reasonable vibration operation. Preliminary test results are given considering the chemical reactions, particulate matter, and CO and HC reductions. An operative removal efficiency up to 99 percent is obtained (relative percentage units with respect to initial maximal concentrations). The basics of power supply construction and output waveforms are given.

Topology of a high voltage pulse generator using parasitic parameters of autotransformers for non-thermal plasma generation

In the article a converter topology for high voltage, nanosecond pulse generation is introduced. Proposed topology uses parasitic parameters of autotransformers as circuit components. Introduced converter was used to generate Pulsed Corona Discharge (PCD). Numerical analysis and results of laboratory measurements of the properties of proposed topology are presented. The voltage pulse was obtained with a duration less than 100ns, voltage amplitude of 15.3kV, with the power of 4kV. The peak power delivered to the reactor amounted to 260kW.

Single-period AC source with energy transfer control for dielectric barrier discharge plasma applications

Dielectric barrier discharge reactors are often operated using the pulse density modulation technique. A resonant converter topology is proposed with the ability of energy transfer control. Three different circuit topologies are proposed with energy recovery snubber design. System description, simulation results and test-stand waveforms are presented and discussed.

Practical verification of topology for a high voltage pulse converter for non-thermal plasma generation

This paper presents the topology of the high voltage, pulsed converter using transformer parasitic parameters. The converter uses solid-state switches and generates (in no load conditions) a voltage pulse with an amplitude of 20 kV with 5kV supply. The steepness of the voltage rise without load is 1.36 kV/ns and the pulse duration is less than 100ns.