基于DSP的卷烟机等张力供纸系统研究

Research on Paper-supply System of Cigarette Machine with Constant Tension Based on DSP

针对卷烟机供纸系统的等张力控制问题,提出了一种以TMS320LF2407A DSP为核心的,基于空间矢量脉宽调制(SVPWM)技术的新型卷烟机等张力供纸系统设计方案。详细介绍了系统的软、硬件设计及SVPWM算法的实现。系统硬件设计主要包括变频主电路、控制电路等几部分;软件设计通过调用定时器下溢中断服务子程序完成数据采样和异步电机矢量控制,然后调用SVPWM子程序,采用7段式SVPWM波形,改变逆变器输出频率,调节供纸电机转速,实现系统的等张力控制。实验结果表明,该系统结构简单,控制精度高,并具有良好的动、静态性能。

Aiming at constant tension control problems of cigarette machine paper-supply system,this paper presents a new type of cigarette machine paper-supply system design with constant tension based on TMS320LF2407A and space vector pulse width modulation（SVPWM） technology.This system software and hardware design and SVPWM algorithm realization are introduced.The hardware design of this system mainly includes frequency conversion main circuit,con-trol circuit and so on.The system software design calls timer underflow interrupt service subroutine to complete data sampling and asynchronous motor vector control,then calls SVPWM subroutine.The SVPWM subroutine uses seven segment SVPWM waveforms,changes output frequency of frequency converter,and regulates paper-supply motor speed to realize constant tension control of paper-supply system.The experimental results show that this system has simple structure,high control precision and good dynamic and static property.