横切割机的电气传动系统设计.docx

辽宁科技大学本科生毕业设计说明书 第 PAGE \* MERGEFORMAT IV页 横切割机的电气传动系统设计 摘要 横切割机是板材生产中的重要设备，一般由开卷机、飞剪车、切边机、矫直机、风机与传送台、电气控制柜和操作台等组成。控制系统是横切机的核心部分，控制系统的先进性决定着产品质量和生产效率的高低，研究设计调速系统则是控制核心。首先分析了横切机的各部分工作原理，采用S7-200PLC小型的可编程控制器实现对调速系统控制。选择了MM440变频器，了解变频器的参数及其工作原理，学习了变频器的调试方法完成变频调速，控制电机的启停和正反转，使其能够正常工作。通过控制电机的转速负反馈来实现调速。采用变频调速系统，共有三套调速装置分别控制开卷机、矫直机和飞剪电机，经过PLC的协调，实现高质、高效的生产。通过计算选择合适的电机、驱动转换器以及制动电阻的尺寸。我们设计的控制方案应该能够有效的提高横切机的工作效率，并且大大提高剪切精度和速度。 关键词：横切机；变频器；调速系统；PLC Electric cross cutter transmission system designs Abstract Cross-cutting machine is an important plate production equipment, generally by unwinding, flying shear car, trimming machine, straightening machine, fan and transfer stations, electrical control cabinet and console components. Control system is the core of cross-cutting machine, the control systems advanced nature determines the product quality and production level of efficiency, the study design speed control system is the control center. Firstly, the various parts of the working principle of cross-cutting machine, using a programmable controller for small S7-200PLC of speed control system. Select the MM420 drive, and how it works to understand the parameters of the inverter, learning ways to debug complete VVVF inverter to control the motor start and stop and reversing, to enable them to work properly. By controlling the motor speed negative feedback to achieve speed. Frequency control system, a total of three speeder control the uncoiler, leveler and shears motor, coordinated PLC, to achieve high-quality, efficient production. By selecting the appropriate calculation of motor, drive converters and braking resistor. We designed the control program should be able to effectively improve the efficiency of cross-cutting machine, and greatly improve cutting accuracy and speed. Keywords: cross-cutting machine; frequency converter; speed control system; PLC 目录  TOC \o 1-3 \h \z \u   HYPERLINK \l _Toc421720331 1绪论  PAGEREF _Toc421720331 \h 1  HYPE