基于DSP的晶闸管全数字控制器

利用DSP功能强、运行速度快的特点,将数字触发器与数字调节器相结合进行综合设计,构成一种基于TMS320F240的晶闸管全数字控制系统;讨论了高精度晶闸管电压线性数字触发的方法,解决了控制量与输出量电压之间非线性问题;用软件实现同步信号的检测与主回路电压相序判别,使外围硬件结构更简单;提出用GAL器件实现输出脉冲分配的方法,可节省DSP系统的I/O口;在数字PID调节器的基础上,采用自适应参数调整算法,实现智能控制;利用DSP的通信接口以实现与上位机通讯;利用主回路为三相桥式全控电路的晶闸管变流装置,进行电流闭环控制试验.研究结果表明,全数字控制器控制的整流波形具有良好的平稳度和对称度,并具有较高的控制精度.

Digital controller for thyristor based on DSP

Taking advantage of power function and rapidity of DSP,a new type of digital controller which integrates digital trigger circuit and digital regulator is designed.The paper discusses the design of the linear digital trigger with high accuracy. The non-linear problem between control variable and output variable is solved.Software is used to detect sync signal and distinguish voltage phase sequence which can simplify periphery hardware.Meanwhile,the article puts forward a method to distribute output pulse with GAL so as to save I/O resource of DSP system .Based on digital PID adjuster, parameter self-adaptive algorithm used to implement intelligent control is proposed.The controller can communicate with PC by SCI.The experimental results indicate that rectifying waveform has good stability and symmetry and the system has high precision and rapidity for dynamic respondence.