The Improved M/T method with 80C552 and a photo- electricity coder to measure electro-motor' s rotation speed can achieve a large scale of rotation speed measuring precision.

用80C552单片机和光电码盘配合改进的M/T法，检测铸轧辊的执行电机转速可获得大范围内测速精度。

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C. motor "s stator to an electric source of industrial frequency. In this method the stator of A. C. motor is rotatable. The rotation direction and speed of the stator are controlled by a hydraulics."

在这种方法中，交流电动机的定子是可以转动的，液压控制系统控制电动机定子的转向和转速。

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C. motor "s stator to an electric source of industrial frequency. In this method the stator of A. C. motor is rotatable. The rotation direction and speed of the stator are controlled by a hydraulics."

在这种方法中，交流电动机的定子是可以转动的，液压控制系统控制电动机定子的转向和转速。

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