Because of the DC speed governor driving system stability, wide speedcontrolrange, easy automatization and it's widely used in new built factory.
由于直流调速拖动系统平滑稳定，调速范围宽，因此，容易实现自动化，并在新建厂矿企业广泛应用。
2
Direct control of torque over the motor speedrange is provided by the drive, which helps the motor and drive generate torque levels high enough to cycle the press back to ready position.
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。
3
When driving on expressways, the driver must control his or her speed within the range of the posted maximum and minimum speed.