电除尘用300W可调直流高压电源设计

发布时间：2018-02-14 14:01

本文关键词： 高频除尘器闪络捕捉梯度调压高频变压器　出处：《杭州电子科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：工业文明和城市高度发展的今天,空气污染已然成为了一个无法逃避的现实。电除尘器因其净化效率高、烟气处理量大、维护方便等优势,在空气治理领域发挥了巨大的作用。随着我国排放标准的提升,对电除尘器的除尘效率和节能方面提出了更高的要求,致使其核心组件电源部分的设计得到了广泛的关注。在这种背景下,本文对电除尘器电源的硬件设计及控制系统的实现进行了深入研究,优化了电除尘器工况的监控与控制方式,研制了一种适用于小型工厂尾气处理、餐饮业油烟净化的高压电除尘电源。本文设计的电除尘电源以STC单片机为控制核心,通过捕捉火花闪络信号,实时分析电除尘器运行工况,自适应调节电源输出,使电除尘器运行于最佳工作电压下,始终保持高效的除尘效率。文中详细介绍了交流输入回路、辅助电源电路、功率转换电路、火花闪络检测电路、脉宽调制电路以及电压采样反馈回路。通过对各部分电路的分析,计算了关键器件的详细参数并确定了器件的选型。辅助电源采用反激式拓扑结构,为系统内部控制芯片提供稳定的工作电压,相比直接采用工频变压器降压,能耗较低。根据电源设计指标,功率转换电路最终采用半桥拓扑结构作为主电路,结合火花闪络检测电路和电压采样反馈回路信号,通过脉宽调制电路调节电源输出,为电除尘器提供稳定的合适的工作电压。本设计创新点有两个:一、根据闪络发生的机理,设计了火花闪络检测电路,降低了火花闪络的漏检率和误检率,为调整电源输出提供有力依据。同时针对不同强度的闪络,系统采取了不同的处理措施,确保了电除尘高效的除尘效率。二、针对重火花放电现象,电源采用梯度调压机制,不仅有效保护电除尘器机体本身,还解决了因电除尘器工作电压骤然下降而导致二次扬尘问题。本文第六章对电源系统进行了相关测试。实验结果表明,各电路能够正常工作。针对电除尘器不同工况,电源系统能够自适应调节输出电压。电除尘器的除尘效率得到了进一步提升,全面提高了电除尘电源的运行维护和管理水平,达到了预期的效果。
[Abstract]:The height of the development of industrial civilization and the city today, air pollution has become an inescapable reality. Esp because of its high purification efficiency, flue gas treatment capacity, convenient maintenance and other advantages, has played a huge role in the field of air control. Along with our country to enhance the emission standards, put forward higher requirements energy saving and dust removal efficiency of electrostatic precipitator, resulting in the design of the core components of the power supply has been widely concerned. In this context, the implementation of electric precipitator power supply hardware design and control system to conduct in-depth research, to optimize the monitoring and control mode condition of electric dust collector was developed. Suitable for small plant tail gas treatment, high voltage electrostatic precipitator power supply cooking oil fume purification. The design of the ESP power supply to STC microcontroller as control core, by capturing the flash signal, real-time analysis Operation of electrostatic precipitator, adaptive power output, so that the operation of the electrostatic precipitator in the best working voltage, always maintain high efficiency. The dust removal efficiency is introduced in detail in the paper the AC input circuit, auxiliary power supply circuit, power conversion circuit, flash detection circuit, pulse width modulation circuit and a voltage feedback loop. Based on the analysis of sampling each part of the circuit, calculate the detailed parameters of key components and determine the selection of the devices. The auxiliary power supply with flyback topology, provide stable operating voltage for the system of internal control chip, compared directly with a frequency transformer step-down, low energy consumption. According to the design of the power supply indicator, power conversion circuit with half bridge topology as the main circuit, detection circuit and the combination of spark flashover voltage sampling feedback loop signal, adjust the power output by a pulse width modulation circuit for electrostatic precipitator The stability of appropriate working voltage. The design has two innovations: first, according to the mechanism of flashover, flashover spark detection circuit design, reduces the spark flashover detection rate and false detection rate, and provide a strong basis for the adjustment of the power output. At the same time for different flashover strength. The system adopts different treatment measures and to ensure the dust removing efficiency of the electric dust removal efficiency. Two, according to the weight of the spark discharge, the power supply voltage gradient mechanism, can effectively protect the ESP body itself, but also solves the working voltage of electric precipitator for sudden drop caused by two times the dust problem. In the sixth chapter, the related test on the power system. The experimental results show that the circuit can work properly. The electric precipitator under different working conditions, the power system can adaptively adjust the output voltage. The electric dust efficiency has been further improved, and comprehensively improve The operation and maintenance and management level of the electric dust removal power supply have reached the expected effect.

【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN86

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