摘要:直流电动机电枢由三相晶闸管整流电路静平波电抗器供电,并通过改变触发器移相控制信号调节晶闸管的控制角,从而改变整流器的输出电压,实现直流电机的调速。直流PWM-M调速系统采用全控型电力电子器件,调制频率高,在小功率调速系统和伺服系统中的应用很广泛。Simulink是在matlab环境下建立系统框图和仿真的模块库。本文设计的双极式直流PWM-M可逆调速系统的MATLAB仿真中主电路部分使用power system模型库的模块,并增加了转速调节器ASR和电流调节器ACR,都采用带输出限幅的PI调节器,运行后电流调节器输出信号的变化时变流器的脉宽随之调整,输出电压值也随着变化,使电流保持不变。4696
关键词: 直流电动机; Simulink;MATLAB仿真;power system模型库
Study of bipolar dc PWM reversible speed regulating system
Abstract:Dc motor armature by three-phase thyristor rectifier circuit static flat wave reactor power, and by changing the trigger phase shifting control signal to adjust the thyristor control Angle, so as to change the output voltage of the rectifier, dc motor speed control. Dc speed control system using PWM - M control type power electronic components, high modulation frequency, in small power speed regulation system and servo system, the application of a wide range. Simulink is established in matlab environment system block diagram and simulation module library. Bipolar type dc PWM -m reversible speed control system using MATLAB simulation in the main circuit part of the power system model library module, and increases the speed regulator ASR and ACR current regulator, is used with PI regulator output limit, after the operation current regulator output signal changes when the inverter pulse width changed accordingly, also with change output voltage value, current remain unchanged.