本科毕业论文_1000va后备式ups电源设计.doc

1000VA后备式UPS电源设计 摘 要 随着信息技术的发展，UPS逐渐被广泛地应用于银行、证券、军事、医疗、航空航天等众多领域。然而，我国仅有少数地区刚刚解决了电力紧张的问题，大部分地区和大城市还面临着电力供应紧张的迫切问题，供电质量更是不能得到保证。但即使是在早已实现电气化的美国和其它国家，电网的质量。由于电网本身的问题与各种偶然因素的作用，电压浪涌，电磁噪声，持续电压偏高，持续低压等电网不良现象在发达国家也是，甚至还可能发生短时间停电。来自电网的不良因素还有，电源电压瞬时或长时间的下陷、浪涌和中断；电源频率的漂移和不稳；电源输入波形畸变；各种尖峰干扰和噪音等。这一切对于高精度的敏感仪器和不能中断的设备来说是非常的。:不间断电源，逆变，模块化设计，功能模块、SPWM控制技术 Abstract Along with the information technology development, UPS widely is applied gradually in the bank, the negotiable securities, the military, the medical service, the aerospace and so on the multitudinous domain. However, our country only had the minority area just to solve the electric power tense problem at present, the majority of areas and the big city also faced the electric power supply tense urgent question, the power supply quality cannot obtain the guarantee. But even if is already is realizing electrical modernization US and other developed countries, the electrical network quality also is must often important. As a result of the electrical network itself question with each kind of accidental factor function, the voltage surge, the electromagnetism noise, continues the voltage to be high, continues electrical network undesirable tendency and so on the low pressure also is sometimes occurs in the developed country, even also possibly has the short time power cut. Comes from the electrical network not good factor also to have, the supply voltage flickers now and then the long time to undercut, the surge and the severance; The supply frequency drifting and is not steady; Mains input waveform distortion; Each kind of peak disturbance and noise and so on. All these the equipment which and cannot sever regarding the high accuracy sensitive instrument said is extremely harmful. Therefore researches and develops one kind of reliable power source to appear especially importantly, but UPS is one kind of very good electric power resources,The UPS outset is the pure achievement one kind