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1、南京航空航天大学硕士学位论文 i 摘 要 本论文对逆变电源的数字控制技术进行研究。相对于模拟控制，数字控制具有能够简化硬件电路设计、克服模拟电路参数温度漂移、控制灵活易于实现先进控制技术、性能可靠、降低开发周期等优点，且随着新型电力电子器件和数字处理器的飞速发展，数字控制的逆变电源应用日益广泛，成为以后电源发展趋势。 本论文在单相逆变电源电路模型的基础上建立了连续时间和离散时间域数学模型，为控制系统的设计提供了理论基础；简单介绍了正弦脉宽调制原理和单、双极性正弦脉宽调制的工作原理，分析了正弦脉宽调制下的谐波含量。文章第三章介绍了数字 PID 技术和离散滑模控制技术，根据双环控制的优点，用 MA
2、TLAB/SIMULINK 仿真软件分别建立了电压外环为 PI 控制和电压外环为离散积分滑模控制的单相逆变器仿真模型并进行了仿真分析。第四章构造了基于TMS320LF2407A 的单相数字控制逆变电源实验平台，详细介绍了系统硬件电路设计，软件程序的实现方法。文章最后给出了单相电压源逆变电源的试验波形及其分析，实验结果表明该系统具有良好的动静态性能。 关键词：关键词：逆变器；数字控制；双环控制；数字信号处理器 基于 DSP 的逆变电源数字控制技术研究 ii ABSTRACT Digital control technology of inverter power supply is studie
3、d in the dissertation. Compared with analog control, the digital control technology has the significant advantages: simplify the hardware design, overcome the parameters of temperature drift of analog circuits, flexible control and can easy realize the advanced control technology, reliable performan
4、ce, reduce the development cycle, etc. And with the fast development of new power electronic devices and digital signal processor in the nowadays, the application of digital controlled inverter power supply becomes widely, so the digital controlled inverter is the development trend of future. The co
5、ntinuous-time and discrete-time domain mathematical models based on the inverter power supply circuit model are established, which provide the theoretical foundation for the control system design in this paper; the principle of SPWM and the working principle of single, bipolar SPWM is simply introdu
6、ced, the harmonic content is analyzed. The chapter 3 of paper introduces the digital PID control technology and discrete sliding mode control technology. According to the advantages of dual-loop control strategy, the two simulation models are established and simulated by MATLAB/SIMULINK Software. Th
7、e voltage loop of one model is controlled by PI controller; the other one is controlled by the discrete-time integral sliding model controller. The single-phase digital controlled VSI platform is constructed. The design procedures of hardware and software program are introduced in details. Finally t
8、he experiment results about single-phase voltage inverter are presented and analyzed. The results reveal that the system has the excellent dynamic and static state performance. Keywords: Inverter; Digital control; Dual-loop control; Digital signal processor 基于 DSP 的逆变电源数字控制技术研究 vi 图表清单 图 1.1 重复控制系统框
9、图.3 图 2.1 逆变器等效电路模型.5 图 2.2 正弦调制脉冲序列波.7 图 2.3 单相桥式 PWM 电路.8 图 2.4 单极性 SPWM 调制原理.10 图 2.5 双极性 SPWM 调制原理.10 图 3.1 数字 PID 调节系统.13 图 3.2 逆变电源数字控制框图.14 图 3.3 系统根轨迹图.16 图 3.4 系统开环传递函数伯德图.17 图 3.5 电压外环等效控制框图.18 图 3.6 无补偿系统开环伯德图.19 图 3.7 电压外环为 PI 控制的系统仿真模型.26 图 3.8 PWM 驱动电路模型.26 图 3.9 电压外环为离散积分滑模控制系统的仿真模型.27 图 3.10 滑模控制器模型.27 图 3.11 PI 阻性空载输出电压波形.28 图 3.12 DISMC 阻性空载输出电压波形.28 图 3.13 PI 阻性满载输出波形.28 图 3.14 DISMC 阻性满载输出波形.28 图 3.15 PI 阻性突加减负载输出波形.29 图 3.16 DISMC 阻性突加减负载输出波形.29 图 3.17 PI 感性负载输出波形.
