运动控制系统-转速、电流双闭环v-m直流调速系统.doc

运动控制系统-转速、电流双闭环V-M直流调速系统
运动控制系统课程设计
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转速、电流双闭环V-M直流调速系统
转速电流双闭环直流调速系统
Speed and current double closed-loop V-M DC
speed regulating system
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摘要
直流电动机具有良好的起动、制动性能,宜于在大范围内平滑调速,在许多需要调速或快速正反向的电力拖动领域中得到了广泛的应用。从控制的角度来看,直流调速还是交流拖动系统的基础。该系统中设置了电流检测环节、电流调节器以及转速检测环节、转速调节器,构成了电流环和转速环,前者通过电流元件的反馈作用稳定电流,后者通过转速检测元件的反馈作用保持转速稳定,最终消除转速偏差,从而使系统达到调节电流和转速的目的。该系统起动时,转速外环饱和不起作用,电流内环起主要
作用,调节起动电流保持最大值,使转速线性变化,迅速达到给定值;稳态运行时,转速负反馈外环起主要作用,使转速随转速给定电压的变化而变化,电流内环跟随转速外环调节电机的电枢电流以平衡负载电流。并通过Simulink进行系统的数学建模和系统仿真,分析双闭环直流调速系统的特性。
关键词:双闭环;晶闸管;转速调节器;电流调节器;Simulink
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Abstract
The design uses thyristors, diodes and other devices designs a speed, current double-loop SCR DC converter system. The system sets up the current detecting aspect, the current regulator ACR and the speed detecting link, speed regulator ASR, composes the current central and the speed central, the former through the feedback of the ponents to level off the current, the latter through the feedback of speed detecting device to maintain the speed stably and finally eliminates the deviation of speed bias.,thus allowing the system to the purpose of regulating the current and speed. when the system starts, the speed outer ring saturats non-functional, the current inner ring plays a major role to regulate the starting current to maintain the maximum so that the speed linear change, to reach a given value; when it operates steadily, the speed negative feedback from the outer ring plays a major role ,to let the speed changes with the given speed voltage , at the same time the current inner ring regulates the armature current of motor
adjustment to balance the load current. Simulink for system through mathematical modeling and system simulation. Finally display control system model and the results of anti-truth.
Keywords: Double-loop; thyristors,;the speed regulator ;the current regulator;Simulink
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