他励直流电机闭环复合调速系统设计与仿真

Design and Simulation of Combined Closed-loop Speed Modulating System of the Separately Excited DC Motor

他励直流电机具有易于调速的特征,同时具有较硬的机械特性。将降压调速与弱磁调速进行综合运用可以充分发挥其调速特性的优势。闭环调速系统则可进一步增强其硬特性,提高抗干扰性并实现对电机转速的准确控制。在对他励直流电机本身的电磁特性的分析的基础上,采用降压和励磁调速的复合方式,确定了闭环复合调速系统的控制策略与相关系数,建立了相应的结构模型与仿真模型,并运用Simulink对调速系统进行分析。

Separately excited dc motor possessed both better speed regulation and hard mechanical performance. Combining the voltage modulation and field weakening would result in better speed-regulation characteristics. Its close-loop speed regulation system would strengthen its hard mechanical features, improve the ability of anti-disrup- tion outside and realize the correct speed control of the motor. Based upon the analysis of the electromagnetic features of separately excited dc motors itself, the combinition of voltage modulation and field weakening were adopted cloed loop speed-control strategy and related coefficiency were confirmed and relative construction ＆ simulation model were established. Also the system was analyzed by means of simulink.