24V交流单相在线式不间断电源硬件设计毕业论文.doc

摘 要 UPS（Uninterruptible Power Supply）是一种储能装备，可以连续不断地向一些用户的关键设备（铁路和民航的售票系统、互联网数据中心、医院的生命维护设备、银行的清算中心等）提供频率稳定、精度高、失真度小的高质量正弦波电源。传统的逆变电源多为模拟控制，虽然模拟控制技术已经非常成熟，但模拟电路存在电路复杂，体积庞大，不够灵活，一致性差，不便于调试，产品升级困难等缺点。伴随着DSP、高速MCU的出现，使逆变电源的数字化控制成为现实，数字化控制也成为了UPS未来发展的一大趋势。 本文对50Hz逆变电源数字化控制的实现做出了详细的介绍。论文通过建立逆变器的模型，对SPWM的数学模型进行了理论分析。提出了基于dsPIC30F2010芯片的单相SPWM逆变电源的数字控制技术的硬件设计。本文还对该系统的硬件设计部分做出了详细地介绍分析，并对硬件系统进行了调试，对调试结果进行了数据分析，同时对于调试过程中出现的问题进行了进一步工作的展望。 系统采用单相全桥逆变电路，输出电压24V，额定电流1A，开关频率为20kHz。利用采样输出电压闭环实现了系统的数字化控制，输出特性基本满足要求。 关键词：逆变器；不规则采样法；数字控制；DSC；滤波 ABSTRACT UPS(Uninterruptible Power Supply) is a kind of energy storage equipment, can continuously provide sine wave power of frequency stability, high precision, small distortion degree of for users key equipment, such as railway and civil aviations ticketing system, internet data center, the hospitals life of maintenance equipment, bank settlement center, and so on. Most of traditional inverter power supplies are analog?-control. Although analog?-control technology has already been very ripening, but the analog circuit exists?many shortcomings, as circuits over complexity, large volume,unflexible, poor-consistency, ?unconvenient for debug, difficulty in product upgrades. With the emergence of DSP, high-speed MCU,the digital control of inverter power supply has become a reality, digital control has also become a trend in the future development of the UPS. This paper carries out a detailed introduction on the digital control of 50Hz inverter power supply.By establishing the inverter power supply model,the paper make a analyzed theoretically in the mathematical model of SPWM. This paper puts forward a kind of hardware design for the single-phase SPWM inverter digital control technology which is based on the dsPIC30F2010. The paper also makes a detail analysis of the systems hardware designing part, and the debugging of hardware, the data analyses for the debugging results.Meanwhile,this paper conducts a prospect of the further work based o