Flyback Based Resonant Converter for High Voltage Pulsed Load Application

Chinara Kuldip, N. Lakshminarasamma
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引用次数: 1

Abstract

This paper focuses on a flyback based resonant converter topology for obtaining a pulsed high voltage for low power applications like ozone generators. In this paper, a flyback based resonant converter is proposed in order to obtain a variable pulsed output voltage ($\mathbf{2}.\mathbf{5}\ \mathbf{kV}-\mathbf{10}\ \mathbf{kV}$) fed from an input voltage of 230 V, 50 Hz AC supply. Ozone generators are low power applications with the pulse repetitive rate limited to 1 kHz to 5 kHz and the pulse width limited to $\mathbf{10}\ \mu\mathbf{s}$ to $\mathbf{30}\ \mu\mathbf{s}$. For ozone generation, the oxygen is passed through a dielectric barrier discharge chamber, which is subjected to a high voltage across its electrodes which supply the energy for the micro discharges to take place. In this paper, the high voltage pulses are obtained through a resonant circuit topology with a transformer in the output stage to boost the output voltage and give isolation. The resonant capacitor is charged through a flyback circuit after every switching instant of the resonant circuit to the desired voltage magnitude, ensuring charging time constraint. In the proposed work, the high voltage pulses of desired voltage magnitude with pulse repetitive rate and pulse width are designed and validated through simulation results.
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用于高压脉冲负载的反激谐振变换器
本文重点研究了一种基于反激谐振变换器的拓扑结构,用于低功率应用,如臭氧发生器,以获得脉冲高压。为了获得可变脉冲输出电压($\mathbf{2}),本文提出了一种基于反激式谐振变换器。\mathbf{5}\ \mathbf{kV}-\mathbf{10}\ \mathbf{kV}$),输入电压为230v, 50hz交流电源。臭氧发生器是低功耗应用,脉冲重复率限制为1 kHz至5 kHz,脉冲宽度限制为$\mathbf{10}\ \mu\mathbf{s}$至$\mathbf{30}\ \mu\mathbf{s}$。对于臭氧的产生,氧气通过一个介电屏障放电室,在其电极上施加高电压,为微放电提供能量。在本文中,高压脉冲是通过谐振电路拓扑获得的,在输出级有一个变压器来提高输出电压并进行隔离。谐振电路的每个开关瞬间后,通过反激电路将谐振电容充电至所需电压幅值,保证充电时间约束。在所提出的工作中,设计了具有所需电压幅值、脉冲重复率和脉冲宽度的高压脉冲,并通过仿真结果进行了验证。
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