The research of three-phase inverted power supply system

随着信息技术的飞速发展，现代化的设备对电源系统的质量提出了新的要求。由于市电电网存在着波动，干扰现象较为严重，会给一些重要的仪器带来不可估计的冲击，而一些设备对于电源频率的特殊要求，促使逆变电源的出现。逆变电源，即是把不符合设备要求或是不能很好的满足设备需要的原始电能转换为高质量的符合设备工作要求的电能。其核心技术部分为调制方式的选择以及后续滤波器及控制器的设计。同时在电源系统的日常管理维护中，计算机技术的发展使得管理智能化得到了体现，友好的人机界面能有利于更好的监测各模块的工作状态，同时可以随时升级下位机软件。本文根据实际需要，制作了一台三相逆变电源。 在本文中，首先对逆变电源系统基本结构...With the rapid development of information technology, higher quality of the power system has been raised by the modern equipments. Electricity grid has fluctuations, and its interference is serious, which would bring incalculable impacts to the important instruments, meanwhile, some equipments have the special requirements of power frequency, all of these promote the emergence of the inverter. The...学位：工学硕士院系专业：物理与机电工程学院机电工程系_机械制造及其自动化学号：1992007115115

Application of Inverter Power System Based on AVR MCU

针对现代电源变频调幅的要求,提出了利用对称规则采样原理产生SPWM信号,选用ATMEgA16单片机,设置其16位计时器为相位修正PWM模式产生SPWM信号,结合查表及在线计算方法,实现变频调幅.同时利用其内部集成的Ad模块对逆变桥输出进行采样并进行均值滤波处理,实现对系统的PI闭环控制.采用Ir2110作为驱动桥,并通过全桥逆变电路及lC无源滤波实现正弦波的输出.系统加入过温过流监测模块,并有人机交互界面.实验的结果表明,此方案输出电压动态响应速度快,具有良好的精度控制及实时性,波形失真小,可靠性高.To meet the modern power-supply requirements,variable frequency and amplitude modulation,this paper presented a design proposal for the usage of the principle-symmetry rules to generate SPWM signal.ATmega16 was selected for using its 16-bit timer,it's set as the phase-corrected PWM mode to the generation of SPWM signal.The design used look-up table and on-line calculation method so as to achieve the variable frequency and amplitude modulation requirements.Meanwhile,the system used the MCU's internal AD module to get the value of the output voltage,which was utilized in the PI closed-loop regulation.The use of IR2110 as a drive axle,full-bridge inverted circuit and the LC passive filter implemented for the output sine wave.Over-temperature and over-current monitoring module was designed in the system,so was the man-machine interface.Experimental result shows that the output voltage has great speed and accuracy response dynamic,so as the real-time control,the output waveform distorts a little,the system runs stably.福建省科技计划项目(2007H0035)资