关于交流机可控硅串级调速性能的讨论已有不少文献,但对它的机械特性的绘制尚无简便方法,对它的动态数学模型及其线性化的讨论尚很少见。本文先讨论交流机可控硅串级调速具有SCR-D性质,然后提出一种绘制串调机械特性曲线的简便方法——相对值曲线。最后对它的动态数学模型指出一般工程线性化的简便方法。 There has been a lot of literature on the discussion of cascaded cascade speed regulation of AC machines. However, there is no easy way to draw its mechanical characteristics. The discussion of its dynamic mathematical model and its linearization is still rare. In this paper, we first discuss the SCR-D nature of thyristor Cascade speed control in AC machines. Then, a simple method of plotting the mechanical characteristics of cascode is presented. Finally, the dynamic mathematical model of it points out the simple method of general engineering linearization.