双闭环直流调速系统设计
摘要
双闭环直流调速系统机械特性硬,调速范围宽,而且是无级调速,所以可
对直流电动机进行调压调速。动静态性能好,抗扰性能佳。速度调节及抗负载和
电网扰动,采用双闭环调节
具有调速范围广、精度高、动态性能好和易于控制等优点
在
Ⅱ
阶跃扰动时无稳态误差,并具有较好的抗扰性能,速度环设计成典型 型系统。
直流调速系统
PI 调节器,可获得良好的动静态效果。电流环校正成典型 I 型系统。
为使系统
为了实现转速和电流两种负反,馈分别起作用,可在调速系统中设计两个调节
器,分别引入转速负反馈和电流负反馈。二者之间实行嵌套联接。把转速调节器的输出当作
电流调节器的输入,再用电流调节器的输出去控制电力电子变换器
UPE。从闭环结构上看,
电流环在里面,称作内环;转速环在外边,称作外环,形成转速、电流双闭环调速系统。
关键词:直流调速
双闭环 转速调节器 电流调节器
Abstract :Double closed loop dc speed control system mechanical characteristic hard, wide range
of speed, and is stepless speed regulation, so can of dc motor for pressure regulating speed.
Dynamic and static performance is good, anti interference performance preferred. Adjustable
speed and resistance to load and the disturbance, adopt double closed loop speed regulating has
wide range, high accuracy, good dynamic performance and easy to control the advantages in the
Laplace domain disturbance without steady-state error, and has good performance and speed loop
crosstalk resistant design into typical
Ⅱ type system. Dc speed control system PI adjuster, can
obtain good dynamic and static effect. Current loop correction into typical type I system. For the
system to realize speed and current two negative feedback effect against, respectively, can be in
regulating system design two regulator, respectively introduced the current negative feedback
speed negative feedback and. Implement nested connection between them. The speed regulator
output as current regulator of input, reoccupy current regulator output to control power electronic
converters UPE. From closed loop of the structure, current loop inside, called the inner loop,
Speed loop outside, called outer ring, forming speed and the current double closed loop speed
regulation system.
Keywords:dc speed control double closed loop speed regulator current regulator