【作者】 张静；

【导师】 刘树林；

【作者基本信息】 西安科技大学 ， 微电子学与固体电子学， 2010， 硕士

【摘要】 正弦波逆变电源广泛应用于电力、邮电、通信、航天等各个领域,而且随着微机技术的不断发展和普及,正弦波逆变电源的应用将越来越广。SPWM逆变控制器是正弦波逆变电源的核心中枢,它利用SPWM技术对正弦波逆变电源的频率和幅值进行控制调节。控制器的性能优劣,直接决定了逆变电源的性能,而一个优秀的逆变电源控制器设计,关键在于如何输出性能优异、控制精确的SPWM信号。本文提出了一种基于FPGA器件的SPWM逆变控制器的设计方法,利用Altera公司的EDA工具QuartusⅡ软件,采用自顶向下的方法对该控制器进行了RTL级详细设计。整个SPWM逆变控制器运用模块化结构设计,各模块易于移植,整个控制系统便于功能扩展和升级。设计完成后,对各模块和整个系统进行了仿真,最后将程序下载到EP2C5Q208C8N芯片中,在FPGA开发板上对系统功能进行了测试。该控制器具有输出脉冲精确稳定、频率幅度可在线调节、死区时间可预置、接口简单、动态响应速度快、易修改、易升级、可现场编程等特点。应用所设计的SPWM逆变控制器,研制了一台全桥拓扑SPWM逆变电源样机,分别设计了其脉冲变压器驱动放大电路、电压采样、过流保护和滤波电路,在闭环条件下对理论分析结果进行了实验验证。实验结果证明了理论分析的正确性和提出方案的可行性。更多还原

【Abstract】 Nowadays, DC-AC inverters with Sinusoid Pulse Width Modulation (SPWM) techniques are widely used in electric power, postal, telecommunications, aerospace and other fields. Along with the continuous development and popularity of computer technology, SPWM inverters will be applied in much more occasions. The SPWM controllers, which regulate the voltage and frequency by adjusting the SPWM signals, are the core of the inverters. The performance of the controller, directly determines the performance of the inverter. Thus, the key to the design of the controller is how to generate precise and programmable SPWM signals.A design method of FPGA-based SPWM inverter controller is proposed in this thesis. Detailed RTL-level design of this controller is carried out on Altera QuartusⅡsoftware, with the top-to-down approach. The SPWM inverter controller is comprised of seven functional modules, which are easy to transplant and upgrade. Therefore the whole control system can be upgraded easily. After the RTL level design is completed, simulation is made on every module and the whole controller. Finally, the design is downloaded to EP2C5Q208C8N chip at the FPGA kit, in order to verify the system function of the controller. The SPWM controller desiged with this method has advantages of output pulse is precise and programmable, frequency and amplitude can be adjusted on line, the dead-time can be preset, and the output voltage can be regulated in a closed feedback loop and so on.A prototype of full-bridge structured inverter power supply is manufactured based on the above SPWM inverter controller. The driving, sampling, filting and protecting circuits are designed in detail. Experiments are made on the protype in conditions of a voltage closed loop. The experimental results prove the feasibility of the proposed method.更多还原