The experiments of load manifest that the test sample of variable frequency drive for SPCP has good driving capability.
试验样机的带载试验表明，潜油螺杆泵变频驱动装置试验效果良好，性能达到了设计要求。
The movement law and electric driving system are analyzed. Variable frequency technique used in the system is discussed and PLC is used for automatic control of the pumping unit.
分析了数控抽油机的运动规律及电力拖动系统，论述了变频调速技术在系统中的应用。应用可编程控制器(PLC)完成抽油系统的自动控制。
It is fully hydraulic double driving, with the variable frequency and amplitude, articulated turning, so has good driving performance and gradeability.
全液压双驱动，变频变幅振动装置，铰接转向，具有良好的驱动和爬坡性能。
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