Design of a Single-Phase Voltage-Type Multilevel Inverter Circuit for Dielectric Barrier Discharge Load

This article focuses on the study of the dielectric barrier discharge (DBD) load as the research object, a single-phase voltage-type multilevel inverter system that can provide a stepped voltage supply for the load was designed. By analyzing the topological structure and modulation strategy of the multilevel inverter circuit, an electrical model and timing control logic of the power supply system are established. Moreover, a method for generating continuous multilevel voltage waveforms suitable for DBD loads was formed. The entire power supply system is modeled in MATLAB/Simulink, and the simulation results verify that the multilevel power supply system is applicable to DBD-type loads. The results show that a relatively smooth five-level pulse stepped supply waveform can be constructed on the DBD-type load. Under the conditions of a pulse frequency of 20 kHz and a voltage amplitude of 8 kV, the total harmonic distortion (THD) of the power supply system can be controlled below 3%. It meets the requirements of the dielectric barrier discharge device for special power supplies, providing a beneficial reference for the power supply of DBD-type loads.