On the basis of analysis of block diagram of AC speed driver system with speed and slip ratio double closed loops, a system design method is presented with the four quadrants experiment results.

在分析转速、转差双闭环交流调速系统动态结构图的基础上，提出了系统的设计方法，并给出了四象限运行实验结果。

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Thus, the ac input motor and driver system has superior torque characteristics over a wide speed range, from low to high speeds, offering a large speed ratio.

因此，AC输入电机和驱动系统具有在很宽的转速范围内扭矩特性优越，从低到高的速度，提供了大速比。

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Thus, the ac input motor and driver system has superior torque characteristics over a wide speed range, from low to high speeds, offering a large speed ratio.

因此，AC输入电机和驱动系统具有在很宽的转速范围内扭矩特性优越，从低到高的速度，提供了大速比。

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