基于单片机的100kV高压直流电源的研制

发布时间：2018-04-13 18:32

  本文选题：单片机 + PWM调制　； 参考：《南京信息工程大学》2012年硕士论文

【摘要】：高压直流电源在生产生活中有广泛的应用,许多高新技术的发展,都离不开高压电源作为技术支撑。传统的高压直流电源控制方式比较简单,更多的依赖于模拟电子技术发展,与数字电子技术相比,传统的模拟电子技术存在着抗干扰能力不强、效率不高等劣势。随着微处理器的出现和发展,电力电子变换器的控制技术从传统的模拟控制转向数字控制已经成为一个趋势。数字控制技术可使控制电路大为简化,并能提高系统的抗干扰能力、控制灵活性以及智能化程度。 设计了用于电磁脉冲模拟器的高压电源,该电源主要由整流滤波初步稳压部分、单片机调压控制部分、直流斩波电路、低通滤波电路、逆变器、高频变压器、倍压整流电路和反馈电路组成。将工频交流电通过降压、整流、滤波、稳压等环节得到低压直流电,将此直流电输入到直流斩波电路。控制电路采用STC89C52单片机经过软件编程生成PWM波,作为斩波电路的控制信号。斩波电路之后接入低通滤波电路,得到大小可调的直流电。设计用BTS器件实现斩波功能。另一方面,STC89C52通过反馈电压与所需基准电压比较,调制PWM波,即改变占空比,实现高性能可调直流稳压。 可调直流电压输入逆变电路,通过设计的全桥逆变电路得到高频交流方波,此高频交流电压作为高频变压器的输入端电压。对高频变压器研制要求进行了具体的分析,并设计出一个稳定可靠的高频变压器。高频变压器输出端接入到倍压整流电路,从而得到所需的高压直流电。 对选定的主电路拓扑结构进行设计,给出主电路中各参量的设计,包括输入整流滤波电路的参数设计、逆变器、高频变压器以及倍压整流电路的参数设计。对控制部分做了详细的阐述。对整个电源系统完成了软件、硬件的设计。对整个电源系统进行了大量的仿真分析和部分试验对比,给出了仿真结果和试验波形,结果验证了理论分析与设计的正确性。
[Abstract]:HVDC power supply is widely used in production and life, and the development of many high technology can not be separated from HV power supply as technical support.The traditional control mode of HVDC power supply is relatively simple and more dependent on the development of analog electronic technology. Compared with digital electronic technology, the traditional analog electronic technology has some disadvantages such as weak anti-interference ability and low efficiency.With the appearance and development of microprocessor, the control technology of power electronic converter has become a trend from traditional analog control to digital control.Digital control technology can simplify the control circuit greatly, and can improve the anti-interference ability, control flexibility and intelligent degree of the system.The high voltage power supply for electromagnetic pulse simulator is designed. The power supply is mainly composed of rectifier filter, voltage regulation control part, DC chopper circuit, low pass filter circuit, inverter, high frequency transformer, etc.Voltage-doubling rectifier circuit and feedback circuit composition.Low voltage DC is obtained by power frequency alternating current through step-down, rectifier, filter and voltage stabilizer, and the DC is input to DC chopping circuit.The control circuit uses STC89C52 singlechip to generate PWM wave by software programming, which is used as the control signal of chopper circuit.The chopper circuit is then connected to the low-pass filter circuit and the adjustable DC is obtained.The chopping function is realized with BTS device.On the other hand, STC89C52 modulates the PWM wave by comparing the feedback voltage with the required reference voltage, that is, changing the duty cycle to achieve high performance adjustable DC voltage stabilization.The variable DC voltage input inverter is used to obtain the high frequency AC square wave, which is used as the input voltage of the high frequency transformer.The development requirements of high frequency transformer are analyzed, and a stable and reliable high frequency transformer is designed.High-frequency transformer output is connected to voltage-doubling rectifier circuit to obtain the required high-voltage DC.The topology of the selected main circuit is designed. The parameters of the main circuit are designed, including the input rectifier and filter circuit, the inverter, the high-frequency transformer and the voltage doubling rectifier circuit.The control part is described in detail.The software and hardware are designed for the whole power supply system.A great deal of simulation analysis and some experiments are carried out on the whole power supply system. The simulation results and the experimental waveforms are given. The results verify the correctness of the theoretical analysis and design.
【学位授予单位】：南京信息工程大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TN86

【引证文献】

中国硕士学位论文全文数据库 前1条

1 陈玉龙;基于DSP的高压直流电源的设计[D];大连理工大学;2013年

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本文编号：1745699