Design and implementation of a high‐frequency LC‐based half‐bridge resonant converter for dielectric barrier discharge ozone generator

Abstract

This study describes the design and implementation of a high-frequency resonant converter based on the transformerless half-bridge inverter topology. The transformer can be omitted because the voltage gain of the 'LC' tank circuit (without transformer) is sufficiently high to overcome the initiation voltage and to maintain steady ozone yield. Another important contribution of the work is the increase in operating frequencies, that is, up to 95 kHz. This increase has two main benefits: (i) smaller resonant component values (which lead to a smaller size of converter) and (ii) lower initiation voltage. To validate the theory, the high-frequency power converter is designed and tested on a dielectric barrier discharge chamber. It is shown that ozone yield is improved and the ozone formation starts at lower chamber voltages. The experimental and simulation results are found to be in close agreement and hence to validate the design procedures.

Power supply based on a multi‐stage‐shunt class E amplifier applied to ozone generation with high efficiency

“…When the load is the DBD, then the DBD cannot be modelled like a simple resistance. The model for the DBD depends on the switching frequency; for frequencies above 20 kHz, it is common to model the DBD like a capacitor in parallel with a resistance . However, this modelling is not appropriate for asymmetrical waveforms with a DC component.…”

“…The model for the DBD depends on the switching frequency; for frequencies above 20 kHz, it is common to model the DBD like a capacitor in parallel with a resistance. 15,16,20,[31][32][33][34] However, this modelling is not appropriate for asymmetrical waveforms with a DC component. Since, the DBD is conformed with one dielectric in series with a discharge chamber.…”

Hybrid control of the dc–dc SRC operating below resonance

“…Each value of m is corresponding to a unique trajectory (and also a unique operating point). The overall system constructed by interconnecting the square-wave generator (8) and the SRC (7) will be a PWA system. The DPWA approach is not applicable for operation of the SRC below resonance.…”

“…High frequencies are desirable since they result in smaller and lighter magnetic components and faster transient responses [3, 4]. In consequence of these features and the ever increasing demand for higher power density, higher efficiency, and lower electromagnetic interference, the resonant converters are currently of widespread interest and used in many industrial applications such as power supply for radio‐frequency sources [5], induction heating [6], light‐emitting diode driver [7], dielectric barrier discharge [8], and battery charger for electric vehicles [9].…”

A Single-Stage High-Power Factor Converter with Synchronized Self-Excited Technique for LED Lighting

“…The purpose of a self-excited circuit is to drive the power switches repeatedly by using the polarity changes of the voltage across windings of a magnetic component, meaning that it does not need to use an integrated circuit (IC), and the components used to build a direct-current (dc) voltage for the IC can be saved. In the conventional self-excited fluorescent lamp electronic ballast, the circuit topology possesses a half-bridge (inductor-capacitor-capacitor) (LCC) resonant circuit by introducing a saturable transformer connected in series with a resonant circuit to generate the self-excited driving voltage that can drive bipolar junction transistors (BJT) [11][12][13]. Regarding driving a BJT, when it is used as a power switch, it requires a base current sufficiently high enough to drive the BJT to operate in the saturation region.…”