单靠改变输入频率不足以恰当地控制异步电动机的转速,为了防止在低频下因阻抗太低向使电流过大,供电电压必须随同输入频率改变,这是早就公认了的。自从新型大功率三极管和可控硅管广泛应用之后,人们又认识到,要正确地用到伺服机构中去,必须更精细地补偿各种非线性因素。保持电压/频率之比为常数,对于高转速情况一般是足够了,但在低速下就得允许机构的响应呆滞而不平滑。本文论述的是一种电动机的伺服控制系统,根据所需要的转速和转差率计算出定子电压幅值、频率和相位,藉此对异步电动机实现较平滑的和更精确的控制。具有上述参 Simply by changing the input frequency is not enough to properly control the asynchronous motor speed, in order to prevent the low impedance to low current to make the current is too large, the supply voltage must be changed along with the input frequency, which has long been recognized. Since the new high-power transistors and thyristors are widely used, it has also been recognized that the proper use of servo mechanisms must compensate for the various non-linearities more precisely. Maintaining the voltage / frequency ratio as a constant is generally adequate for high speed conditions, but at low speeds the mechanism’s response is allowed to be dull and not smooth. This article discusses a servo motor control system that calculates the stator voltage amplitude, frequency, and phase based on the required speed and slip to achieve smoother and more accurate control of the asynchronous motor. With the above reference