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 current components 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. when operating steadily ,the system without static error, current overshoot volume is less than , when starting to the rated speed with no load ,the speed overshoot volume is less than .

Keywords: Double-loop, thyristors, the speed regulator, the current regulator

目 录
1前言 1
2总体方案设计 2
2.1方案比较 2
2.2方案论证 3
2.3方案选择 3
3单元模块设计 5
3.1主电路—晶闸管整流电路的设计 6
3.2系统稳态设计 7
3.2.1电流检测环节的设计 7
3.2.2转速检测环节的设计 8
3.2.3系统稳态参数计算 8
3.3系统动态设计 10
3.3.1电流调节器的设计 11
3.3.2转速调节器的设计 14
3.3.3整体参数计算 18
4系统仿真 23
5系统功能、指标参数 27
5.1系统功能 27
5.2指标参数 27
5.3系统功能及指标参数分析 27
6总结与体会 28
7谢辞 29
8参考文献 30
9附录：双闭环直流晶闸管调速系统总图 31