串联负载谐振式DBD型臭氧发生器电源

为解决DBD型臭氧发生器工频升压供电方案的效率低、设备体积庞大和对电网注入大量谐波的问题,采用串联负载谐振式供电电源的方案,通过结合电源开关器件的通断和DBD负载放电与不放电状态,详细分析了工作在完全谐振状态下的串联负载谐振式DBD电路,得出了整个电路在完全谐振状态下的各个工作模态;基于模态分析推导了一系列等式。由推导和分析得出了电路谐振时臭氧发生器承受的最高电压、每个周期的放电功率、与串接的补偿电感无关的特性、DBD负载放电功率、DBD负载参数的调节特性;最后给出了较为实用的工程设计公式。这些研究可供合理设计串联负载谐振式DBD型臭氧发生器的供电电源及分析不同控制方式下DBD电路的工作模态参考。

Research on Serial Resonant Inverter Power for DBD-type Ozonier

There exist lots of problems of DBD(Dielectric-Barrier Discharge) load powered by step-up transformer directly,such as low discharge efficiency,big equipment volume and injecting abundant harmonic currents to power lines and so on.In order to solve these problems,a full bridge serial load resonant power supply is adopted.In the paper,the DBD load powered by full bridge serial resonant inverter is studied in detail.By analyzing the on-off conditions of power switch and the state of discharge or not discharge in DBD load,the modes of DBD load and inverter are gotten,which the whole circuit is working in full resonant status.Based on the working modes of DBD load,some correlative equations are deduced.By these equations,the characteristics of the main electric parameters are analyzed.Based on the deducing and analyzing in the paper,it prove that the highest voltage of the barrier capacitance and the output discharge energy in a working period have nothing with the compensated inductance are deduced when the power supply are working in full resonant status.In addition,the regulating characteristics of discharge energy and discharge power are made in different parameters.At the end of the paper,the engineering design expressions are made.The conclusions of the paper is helpful to design the serial load power supply for DBD type ozonier and the analytic method of working modes in DBD load is suitable for other control strategies in serial load resonant power supply for DBD type ozonier.