论文部分内容阅读
七十年代北京第一机床厂生产的X2010A龙门铣床的调速系统为我国第一代可控硅调速系统,由于设计先天不足,元件质量差,机床工作不稳定,低速爬行,调速精度低。它采用的是转速负反馈的有差调速系统。系统动态稳定性差,静态精度低,频响特性不好,动态速降大,起制动过程不平稳,抗干扰能力低,电机换向困难,火花大。因此机床故障频率高,维修费用大。工厂安排这台设备大修,是在原系统上恢复还是彻底改造?经过论证决定采用C系列控制系统来取代A系列系统,但北京一机床厂又无这方面资料可提供,且C系统在机械结构方面有很大差异。故对本控制系统进行了重新设计。采用固体组件运算放大器,组成速度,带电流截止调节器的闭环无静差调速系统。本系统经测试具有良好的静、动态性能。动态速降回升时间快,抗干扰能力强,调速范围达1:100以上,改装了机床操作按钮站,增加了电源变压器及平波电抗器,使整个系统得到了全面改造,经现场使用达到了设计指标。
Seventies Beijing No.1 Machine Tool Plant production X2010A gantry milling machine speed control system for the first generation of thyristor speed control system, due to inadequate design, component quality is poor, unstable machine work, crawling at low speed, low speed accuracy. It uses a negative feedback speed differential speed system. The system has poor dynamic stability, low static accuracy, poor frequency response, large dynamic speed drop, unstable braking process, low anti-interference ability, difficult motor commutation and large sparks. Therefore, high frequency of machine failure, maintenance costs. Factory arrangements for this equipment overhaul, is the original system to restore or complete transformation? After demonstration decided to use C series control system to replace the A series system, but a machine tool plant in Beijing and no information available, and C system in the mechanical structure There are big differences. Therefore, the control system has been redesigned. The use of solid-state component op amp, the composition of the speed, with current cut-off regulator closed-loop no-static speed control system. The system has been tested with good static and dynamic performance. Fast dynamic speed rise and fall time, anti-interference ability, speed range of 1: 100 or more, modified machine operation button station, an increase of power transformers and smoothing reactor, the entire system has been fully transformed, the use of the field to achieve The design index.