毕业设计（论文）-基于DSP控制的双闭环直流调速系统设计.docx

摘要
本文介绍的是一种基于DSP TMS320LF2407A 芯片的双极性可逆PWM直流调速系统数字控制的设计和基于Matlab的仿真设计。选用三相桥式不可整流电路供电。选用H型双极可逆PWM驱动系统对电机进行控制,在一个PWM周期内,电动机电枢的电压极性呈正负变化。驱动电路采用M57215BL芯片,通过DSP的PWM输出引脚PWM1-PWM4输出的控制信号进行控制。用霍尔电流传感器检测电流变化,并通过ADCIN00引脚输入给DSP,经A/D转换产生电流反馈信号。采用增量式光电编码器监测电动机的速度变化,经QEP1和QEP2脚输入给DSP,获得速度反馈信号。通过PDPINIA引脚对电动机提供过电压和过电流保护。运用MATLAB对设计好的系统进行仿真,双闭环调速系统的特征是系统的电流和转速分别由两个调节器控制。速度调节器ASR和电流调节器ACR均设有限幅电路,ASR的输出作为ACR的给定,利用ASR的输出限幅起限制启动电流的作用;ACR的输出作为触发器的移相控制电压。系统的建模包括主电路的建模和控制电路的建模。建模完成后即可进行仿真。
关键词:DSP TMS320LF2407A 芯片;PWM;双闭环直流调速系统;数字控制;Matlab;simulink
PWM DC motor speed digital control system design and simulation
Abstract
This article is based on DSP TMS320LF2407A reversible chip bipolar digital control of PWM DC drive system design and simulation of Matlab-based design. Can not use three-phase bridge rectifier circuits. Use H-type bipolar reversible PWM control of the motor drive system in a PWM cycle, the motor armature voltage polarity was positive and negative changes. M57215BL chip driver circuit, through the DSP's PWM output pins PWM1-PWM4 output control signals. Hall current sensor with current changes, and through ADCIN00 pin to the DSP, by the A / D conversion produces the current feedback signal. An incremental optical encoder to monitor the motor speed changes, the QEP1 and QEP2 pin input to the DSP, to obtain the speed feedback signal. By PDPINIA pin provided on the motor voltage and over current protection. Good system design using MATLAB simulation, the characteristics of dual-loop speed control system is the system's current and speed controlled by two regulators. ASR speed regulator and current regulator are equipped with a limited increase circuit ACR, ASR's output as given ACR, the use of ASR's output from the restrictions limiting the role of starting current; ACR output as the trigger phase control voltage. System model including the main circuit modeling and control circuit modeling. After pletion of the simulation modeling.
Keywords: TMS329LF2407A chip;PWM;doub