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采用电流滞环跟随型逆变器,并采取一定的措施后,将异步电动机动态数学模型简化为三阶模型。并通过非线性变换及反馈将其解耦为两个线性单变量系统。为了能采用较高的采样频率,并实现较复杂的运算,采用了数字信号处理器TMS320C25组成微机系统进行实时控制。文中介绍了调速系统的结构及为发挥DSP快速性而采取的措施。还介绍了实现转子磁链观测所用的方法,以及改进后的M/T数字测速线路和软件设计。最后附上初步试验结果。
Using current hysteresis loop following inverter, and take certain measures, the dynamic mathematical model of induction motor is simplified to the third-order model. And decouples it into two linear univariate systems through nonlinear transformation and feedback. In order to be able to use a higher sampling frequency, and to achieve more complex operations, using a digital signal processor TMS320C25 composed of microcomputer system for real-time control. The paper introduces the structure of the speed regulation system and the measures taken to give play to the rapidity of DSP. The method used to realize rotor flux observation is also introduced, as well as the improved M / T digital speed measurement circuit and software design. Finally attach the preliminary test results.