开发了一种集合数字计算机、模拟计算机和电动伺服控制系统，面向自动控制类课程的综合教学实验仪器。

A kind of comprehensive experimental instrument, which is combined by a digital computer, an analog computer and an electric driving servo system, was proposed for automatic control teaching.

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伺服电动机更容易控制，但是他们的功率都比较小，需要明确的电压，and are less intuitive。

Servos are much easier to control, but they generally are less energy efficient, have explicit voltage requirements, and are less intuitive.

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永磁同步电动机系统具有力矩系数大、力矩波动小以及控制灵活等优点，在许多精密伺服控制系统中得到广泛应用。

Due to the large torque coefficient, small torque ripple and ease of control, permanent magnet synchronous motor (PMSM) system has been widely used in many accurate servo control systems.

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