大学学士学位论文摘要摘要车载逆变器就是一种能把汽车上12V 直流电转化为 220V/50Hz 交流电的电子装置 , 是常用的车用电子用品。 在日常生活中逆变器的应用也很广泛,比如笔记本电脑、录像机和一些电动工具等。本设计主要基于开关电源电路技术等基础知识，采用二次逆变实现逆变器的设计。主要思路是：运用TL494以及 SG3525A等芯片 , 先将 12V直流电源升压为320V/50Hz 的高频交流电，再经过整流滤波将高频交流电整流为高压直流电，然后采用正弦波脉冲调制法，通过输出脉冲控制开关管的导通。最后经过 LC工频滤波及相应的输入输出保护电路后，输出稳定的准正弦波，供负载使用。本设计具有灵活方便、适用范围广的特点，基本能够满足实践需求。而且本设计采用高频逆变方式，具有噪声降低、反应速度提高以及电路调整灵活的优点。设计符合逆变电源小型化、轻量化、高频化以及高可靠性、低噪声的发展趋势。关键词：车载逆变器；脉冲调宽；保护电路；TL494 ；SG3525A；大学学士学位论文ABSTRACT ABSTRACT Car inverter is a kind of vehicle that can be converted to 220V/50Hz 12V DC AC electronic device which is commonly used in automotive electronic products. The inverter applications are very broad in the daily life , such as notebook computer, video recorder and electric tools etc. This design is mainly based on switch power supply circuit technology basic knowledge, using two inverter realize inverter design. The main idea uses the TL494 and SG3525A etc chip, the first 12 V dc power boost for 320 V/frequency 50 Hz high frequency alternating current, and rectification of high frequency ac filter will rectifier for high voltage dc and then using sine pulse regulation law, through the output pulse control switch tube conduction. Finally after LC industrial frequency filter and the corresponding input/output protection circuits, stable output prospective sine wave, used for load. The design is flexible and convenient, apply a wide range of features, can basically meet the demand of...
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