梯形激励下的臭氧发生器供电电源的研究

发布时间：2018-03-06 02:13

  本文选题：介质阻挡放电　切入点：臭氧发生器　出处：《广东工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：臭氧因其独特的物理性质被广泛的应用于生活、工业生产、医疗保健等众多领域。臭氧的产生主要有电解法、紫外线照射法、放射化学法和介质阻挡放电法,其中介质阻挡放电法因其独特的优势被现代科研工作人员广泛的采纳。现阶段,DBD型臭氧发生器的供电电源大多采用串并联谐振式逆变电源,通过调节施加在臭氧发生器上的正弦或准正弦激励的幅值和频率来调节发生器的放电功率,进而调节臭氧发生器的产量。但DBD型臭氧发生器放电的效率与发生器端电压幅值及充电阶段与放电阶段所占时间比密切相关,即只有充电阶段在整个工作周期内所占时间比少且在放电阶段发生器上电压维持在较高电压值(该数值取决于放电管的耐压)时,臭氧发生器才可能得到较高的放电效率。因此从这个角度看,采用正弦波作为DBD型臭氧发生器的激励源,并不是一种高效的激励源。为解决这一问题,本文主要从寻求新型拓扑结构来产生高效激励源、电源系统主要电气量的电气调节特性、多功能硬件回路的实现和采用数字信号处理器进行数字化控制等四个方面,对DBD型臭氧发生器供电电源进行了研究与探讨,本文的主要研究工作分成了以下几个部分：(1)为满足后续供电电源的设计需求,本文对DBD型臭氧发生器的等效模型和DBD型臭氧发生器的介质参数的测量进行了分析。结合目前国内外对等效模型的研究,建立了一个能够准确预测DBD型臭氧发生器负载特性的连续等效模型,将臭氧发生器等效为介质电容与非线性电阻相串联的等效电路模型；为获得DBD型臭氧发生器的负载参数,本文分析了目前广泛被采用的Lissajous图形测量法,采用多组测量的方法对Lissajous图形中指定的关键点进行计算,获得了比较准确的DBD型臭氧发生器负载参数。(2)本文利用能反映介质阻挡放电电路时空关系的等效电路对常用的激励(正弦波、方波、三角波、梯形波)下介质阻挡放电电路(Dielectric Barrier Discharge：DBD)的放电效率进行了分析,得出了交变梯形激励是一种非常适合DBD负载的一种激励源。在梯形激励合成思路的基础上,寻求了一种能够在DBD负载上产生交变梯形波的双频谐振式逆变供电电源拓扑结构。(3)基于这种拓扑结构设计了逆变电路中各个开关管的驱动时序,确保了DBD型臭氧发生器上的激励为交变梯形激励源同时又能方便实现调功的需求；分析了该供电电源在不同模态下的等效运行图,获得了逆变电源在不同模态下的数学约束方程,求解出了臭氧发生器的主要电气参数的数学表达式,分析了DBD型臭氧发生器主要电气参数的电气调节特性。(4)本文采用DSP-TMS320F2812为控制核心的全数字化的控制方式。采用了TMS320F2812的事件管理器产生PWM波的原理和死区调节电路为整个逆变电路提供了适合的驱动波形；同时本文也详细的设计了整个供电电源的模块硬件电路图；对EMI滤波电路、单相不可控整流电路、LC滤波电路、双频逆变主电路的参数设计进行了详细的公式推导,同时对各个电路的器件的型号选型进行了分析。(5)为验证本文所提出的梯形激励下的DBD型臭氧发生器供电电源方案理论分析的正确性,本文从实际出发,在该供电电源硬件系统的基础上分别搭建了仿真模型和实验平台,给出了该电路的实验波形和仿真波形。实验波形、仿真波形与理论分析波形非常吻合,从而验证了供电电源设计的正确性和可行性。
[Abstract]:Ozone due to its unique physical properties have been widely used in many industrial production, life, health care and other fields. The ozone are generated by electrolysis, ultraviolet irradiation, radiation chemical method and dielectric barrier discharge, the dielectric barrier discharge is adopted widely in the modern research staff due to its unique advantages. Stage, the power supply of the DBD type ozone generator mostly adopts the series parallel resonant inverter, by adjusting the applied ozone generator in sine or quasi sinusoidal excitation amplitude and frequency of discharge power to regulate the generator, and then adjust the output of the ozone generator. But the DBD type ozone generator discharge efficiency and generator terminal voltage amplitude and charging the stage and discharge stage took longer than the closely related, that is only charging stage in the whole work cycle took longer than less and in the discharge happened on stage The voltage is maintained at a high voltage value (the value depends on the voltage of the discharge tube), the ozone generator can discharge high efficiency. So from this point of view, using sine wave as the DBD type ozone generator excitation source, and it is not an efficient excitation source. To solve this problem, this article mainly from the seek new topology to generate efficient excitation source, the electrical power system main electrical quantity regulation characteristics, and the use of digital signal processor for digital control of four aspects such as function of hardware circuit, the DBD type ozone generator power supply was studied and discussed in this paper, the main research work of this paper is divided into the following sections: (1) to meet the design requirements of subsequent power supply, the measurement and analysis of the parameters of the DBD type ozone generator and the equivalent model of the DBD type ozone generator are combined. 鐩�鍓嶅浗鍐呭�栧�圭瓑鏁堟ā鍨嬬殑鐮旂�，

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