本文介绍由一台可控硅电流源逆变器拖动的异步机系统。系统的控制原理建立在矢量变换的基础上,并由一台十六位微处理器来实现。由于大部分功能由 Intel8086 微处理器来完成,所需的附加硬件很少,本系统只用了输入、输出电路。此外,低速运行时通过调节转矩角来产生电流波的脉宽调制,转子磁链能简单地计算并在很宽的频率范围内基本上保持恒定。 This article describes the asynchronous machine system dragged by a SCR current source inverter. The control principle of the system is based on the vector transformation and implemented by a 16-bit microprocessor. Since most of the functions performed by the Intel8086 microprocessor, the additional hardware required is minimal, the system only uses the input and output circuits. In addition, the pulse width modulation of the current wave is generated by adjusting the torque angle during low speed operation. The rotor flux linkage can be simply calculated and remains substantially constant over a wide range of frequencies.