1) VFD electric drive system
VFD电驱动系统
1.
The harmonic analysis and calculation of the drilling rig's VFD electric drive system
石油钻机VFD电驱动系统的谐波分析和计算
2.
In light of the topological structure of the VFD electric drive system,the harmonic wave produced by the frequency converter was analyzed and calculated,and then it was compared with the measured system voltage waveform and harmonic condition,providing the scientific basis for harmonic suppression of the VFD electric drive system.
针对石油钻机VFD电驱动系统的拓扑结构,分析和计算了变频器产生的谐波,并与实测的系统电压波形及谐波状况进行比较,为石油钻机VFD电驱动系统进行谐波抑制提供了科学依据。
2) VFD controller-driver circuit
VFD驱动电路
3) VFD System
VFD系统
4) Variable frequency driver (VFD)
变频驱动(VFD)
5) VFD display system
VFD显示系统
1.
The paper discusses the driver/controller PT6312 used in the VFD display system.
介绍了VFD显示系统的驱动控制芯片PT6312的内部结构、功能特点和对其编程用到的控制命令,着重给出了宽带多媒体网关VFD显示系统的实现。
6) electric drive system
电驱动系统
1.
This paper gives a brief development of the oil rig electric drive system,and describes the main products at home and abroad ,also sums up the use of computer and fully microprocessor-controlled DC variable speed drive system and the adoption of new technology and technique in respects of the oil rig,at last refers to the direction of domestic products and the prospect of market.
本文概述了石油钻机电驱动系统的发展情况，并对国内外主要产品作了描述，同时对计算机和全数字直流调速系统在石油钻机方面的应用情况以及新工艺新技术的采用情况进行了分析，最后指出国内发展方向和市场远景。
2.
By computer simulation on steering with given variant road conditions,it can be seen that a tracked vehicle with electric drive system can steer in small radius through controlling the output rotate speed of the inside and outside tractive motor respectively.
不同行驶路况下转向的仿真计算和分析表明,履带车辆电驱动系统在输出功率足够的情况下,可以通过单独控制内外侧牵引电机的输出转速实现所需半径转向。
3.
Oil drilling rig electric drive systems are used massively in oil drill picks.
众所周知,电力电子装置(VFD变频传动系统和SCR直流传动系统)对电力系统带来谐波污染,尤其是对柴油发电机组小电网系统,谐波污染的问题将更为严重,而且SCR电驱动系统的功率因数较低,也给小电网系统带来额外负担,影响供电质量。
补充资料：[styrene-(2-vinylpyridine)copolymer]
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性质：学名苯乙烯-2-乙烯吡啶共聚物。微黄色粉末或透明小颗粒晶体。无臭，无味。不溶于水，溶于酸、乙醇、丙酮、氯仿。有抗水、防潮性能，适用于多种药片的包衣等。
分子量：
CAS号：
性质：学名苯乙烯-2-乙烯吡啶共聚物。微黄色粉末或透明小颗粒晶体。无臭，无味。不溶于水，溶于酸、乙醇、丙酮、氯仿。有抗水、防潮性能，适用于多种药片的包衣等。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
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