【作者】 李作军；

【导师】 龚跃玲；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 随着高性能DSP控制器的出现,变频电源的全数字化控制成为现实。数字控制系统具有集成度高、抗干扰能力强、控制灵活、可实现先进的控制算法和便于实时控制等优点。采用DSP作为DC—AC逆变控制的核心,可以用软件很容易地实现灵活、准确的在线控制与故障检测。本文研究了基于TI公司的TMS320LF2407芯片的单相SPWM变频电源的数字控制技术。阐述了变频电源系统的工作原理,分析了逆变系统中最常用的正弦脉宽调制方式及其产生方法。文章首先对逆变器模型和SPWM调制技术做了详细的介绍,分析研究了SPWM波形的产生机理。在此基础上对变频电源的输出波形控制策略进行系统的分析研究,通过研究数字PID控制策略提出了双闭环模糊-PID控制策略,并对这两种控制策略进行了分析比较。然后,根据变频电源的技术要求,提出了硬件电路中各部分的设计方案,完成了系统的软硬件设计,硬件系统包括全桥主电路设计、以DSP为核心的逆变控制系统、驱动保护、采样调理等,给出了各单元的电路设计。控制系统的软件重点阐述逆变器数字控制系统主要环节设计,给出了软件的总体结构、SPWM波形的实现,生成数字正弦基准,实现逆变器逻辑控制功能,即对逆变器的保护、检测进行控制等。最后利用MATLAB和SIMULINK仿真软件建立了逆变器的仿真模型,用以验证控制方案的可行性和有效性。其研究和分析的结果为逆变器的数字化控制的研究、完善和应用建立了基础。更多还原

【Abstract】 With the emergence of high-performance DSP controller, variable frequency power of digital control can be a reality. Digital control system with high integration, anti-interference capability, control and flexible and can be of advanced control algorithms and facilitate the advantages of real-time control. DSP used as a DC-AC inverter control of the core software can be used very easily to achieve flexible and accurate on-line control and fault detection.This article introduces digital control technologies of a single-phase SPWM inverter based on TMS320LF2407. Frequency Power Supply System described the work principle of the inverter system most commonly used in the sinusoidal pulse width modulation and its methods, as well as analog, digital control circuit advantages and disadvantages. Firstly, the article detail introduces the inverter model and SPWM modulation technology, analytical the SPWM waveform generating mechanism. On this basis, the power of the inverter output waveforms for system control strategy analysis of the study by digital PID control strategy for the dual-loop Fuzzy - PID control strategy, And has carried on the analysis comparison to these two kind of control strategy.Then, in accordance with the technical requirements of variable frequency power supply, hardware made in various parts of the circuit design of the hardware and software required to complete the system design, hardware systems include full-bridge circuit design, DSP-core inverter control systems, drive protection , sampling conditioning, and so on, given the circuit design of the modules. Control System Software inverter focus on the core elements of digital control system design, given the overall structure of the software, waveform SPWM the realization of generating sine benchmark figures and realize inverter logic control, the protection of the inverter, detection of control.Finally, simulation software MATLAB and SIMULINK inverter for the establishment of a simulation model to test the feasibility of control and effectiveness. Its research and analysis of the results of the digital inverter controlled study, improve, and the establishment of a foundation.更多还原