大功率感应加热电源并联整流控制系统的研究-电气工程专业论文.docx

大功率感应加热电源并联整流控制系统的研究 摘要 在现今工业中，感应加热电源正朝着大功率、智能化方向发展，而作为其中重要环节 的整流环节担负着为后续逆变电源提供稳定、足够功率的重要职能。在工业系统对感应加 热的大功率要求日益强烈的前提下，就产生了多个整流支路（整流柜、整理模块）并联起 来共同提供系统所需要的整流电源。现今常用的简单把各整流支路并联起来提供直流电的 传统做法常因均流不平衡，而导致有的支路输出电流大，有的支路输出电流很小的情况， 从而使整个系统严重不平衡。所以要对于均流问题提出新的解决方案，从而保证系统正常 的运行。另外的智能化趋势也是系统在现今工业运行中大大简化了控制的难度，并且明显 提高了系统运行的效率，所以采用先进技术使得整个系统控制起来非常便利，更加准确化， 也越来越受到重视。 本文基于 DSP 芯片 TMS320F28335 处理器作为控制系统的核心，搭建 CAN 局域网作 为各主从控制器之间各信息通信的平台，从硬件上保证多任务实时处理的可能性。采用工 业 RS-485 总线作为连接工业触摸屏和各控制核心的桥梁，可以实时的显示当前系统运行 的各个参数，从而判断当前系统运行状态的好坏，并且可以通过触摸屏即时的对当前系统 运行的各个参数进行修改，从而人为地改变当前系统运行状态。另外本课题根据采集得到 的三相电压过零信号、整流输出电压电流信号，构成系统双闭环，采取智能均流算法，实 现当前各并联整流支路输出均流，从而保证系统运行正常。 关健词：感应加热电源，DSP 芯片，工业触摸屏，CAN 总线，智能均流 RESEARCH ON THE PARALLEL RECTIFIER CONTROL SYSTEM OF HIGH-POWER INDUCTION HEATING POWER ABSTRACT In the industry today, the induction heating power is moving in the development of high-power, intelligent direction, and as an important part of the rectifier links responsible for important functions to provide stable and sufficient power for the subsequent power inverter. High-power induction heating industrial systems require increasingly strong premise, on the the rectification power system rectifier circuit （rectifier cabinet finishing module） parallel together to provide. Traditional practices used simple rectifier circuit connected in parallel to provide DC constant current imbalance caused by some branch output current, the output current is very small and some slip, so that the entire system is seriously not balance. So for the average flow problem to propose new solutions, in order to ensure the normal operation of the system. Intelligent trend system in todays industrial operation greatly simplifies the difficulty of the control, and significantly improve the efficiency of the system is running, so the use of advanced technology control the entire system is very convenient, more accurate technology, but also more and more attention. Based on DSP chip TMS320F28335 processor as the core of the control s