基于DSP控制的在线式不间断电源设计（毕业学术论文设计）.doc

精品 摘要 随着信息技术的发展，UPS广泛地应用于银行、证券、军事、医疗、航空航天等 众多领域,以保护一些对供电敏感的负载如电脑系统、通讯系统、医疗系统等。对于UPS整个系统构架，可以说逆变器是不间断电源系统的核心，决定着输出电压波形的质量。同时，高性能数字信号处理器(DSP)的飞速发展，也使得UPS的数字化控制更加精确，从而提高了整个UPS系统的稳定性与可靠性。 本文主要介绍了基于1MS320C2812控制，采用电压电流双环控制的三相半桥逆变器系统的总体设计方案。文中首先对UPS的主要结构进行分析、综合，在其基础上，通过比较各种逆变器的电路结构与工作原理，说明了采用三相半桥逆变器的优点，文中建立了三相半桥逆变器的控制模型，将三相半桥逆变器采用电压电流双环控制，目的是令采用三相半桥逆变器结构的UPS系统具有更好、更强、更可靠的带负载能力，从而为用户提供更加优良的电源。文中根据UPS系统的硬件设计，给出了基于TMS320C2812控制的软件设计方案，结合PWM驱动程序的主程序源代码与A／D采样程序的主程序源代码说明其程序的运行流程。同时，本文通过对采用三相半桥逆变器结构的UPS系统的建模。经过Matlab仿真，证明了本课题设计方案的可行性。最后，本文初步设计了一台UPS，通过实验结果证明了本文设计方案的可行性，创新性和优越性。关键词：不间断电源；数字信号处理器；逆变器；数字PID控制。 Abstract ABSTRACT With the development of information technology,uninterruptible power supply (UPS)which have been widely used in banldng,securities，military,medical， aerospace and so forth,are widely selected for the protection of sensitive loads such as PC，communication systems and medical equipments．It can be said that inverter is the core of UPS and determines the quality of the output voltage waveform for the whole UPS system．Meanwhile，high-performance digital signal plDCgSSOr(DSP)has been rapid development made the digital control more precise for the UPS．Thus the stability andthe reliability ofthe whole UPS system have been enhanced． In this耻Iper，the design of a three-phase half-bridge inverter which controlled by voltage and current double loop based On TMS320C2812 is proposed．The main s『hllgtllres of the UPS are analyzed and synthesized．AfI盯that the merits of the three-phaso half-bridge inverter afe proved by comparing several electrical circuit structures of inverter and their principles of work．Then the three-phase half bridge inverter control model is established．The UPS system adopt three·phase half-bridge inverter which controlled by voltage and current double loop for the reaSOll that the ability ofthe UPS with loads will be better,stronger and more reliable．So it Can provide a finer power for the user．According to the hardware design of the UPS system,the so