直接控制扭矩而不是电机转速范围，可以使得电机和变频器产生足够高的扭矩使得压机可以回复到原来的位置。
Direct control of torque over the motor speed range is provided by the drive, which helps the motor and drive generate torque levels high enough to cycle the press back to ready position.
控制系统的功能是在负载随时变化的工况下，确保机组转速恒定，并使电压输出控制在要求范围之内。
The control system functions to keep speed of the machines substantially constant and the voltage within prescribed limits, even the load may change.
燃油控制系统就是使汽车的发动机工作在有利的转速范围内、节省燃油、提高行驶舒适性的汽车自动行驶装置。
It makes the engine of the automobile work within the range of favorable rotational speed, save fuel, is it go automobile of comfortableness go the device automatically to raise.
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