1) variable frequency motor drive
变频电机驱动
3) VFD AC drive
交流变频电驱动
1.
In this artical partial working theories of electrical drilling rig was analysed initially, such as the requirments of electrical drive for the working machine,the working principles of SCR DC drive and VFD AC drive,analysis of characters of DC and AC motors,the four quadrant motion and principles of energy brack etc.
文章就电动钻机的部分工作理论作初步剖析,包括钻机工作机组对电驱动的要求,可控硅直流电驱动和交流变频电驱动的工作原理,直流电动机和交流变频电动机等的特性分析,电动机的四象限运行和能耗制动原理等。
4) variable frequency drive
变频驱动
1.
By using the special control algorithm of variable frequency drive system, the above said problem is solved.
设计了基于变频驱动系统的专用控制算法来解决“倒发电”问题。
2.
The variable frequency drive technology is applied widely into industry.
本文介绍变频驱动系统中再生能量处理方式和变频调速技术,重点对于在设计能量回馈制动变频器中的能量回馈单元和异步电机控制提出一些建议。
3.
The thesis studies the necessity and rationality of using the technology of variable frequency drive to resolve the bottleneck in SPCP s driving system, and describes the hardware developing process of sample of the variable frequency drive.
本文主要论述了,在潜油螺杆泵采油系统中应用变频驱动技术来解决这一问题的必要性和合理性,并详述了试验样机的硬件开发过程。
5) frequency conversion driving
变频驱动
1.
A frequency conversion driving controller with CPLD is included in this paper, with a frequency converter to drive the motor, and an encoder to feedback displacement of the motor, with stepping speed adjustment to resolve the positioning problem.
文章给出的CPLD变频驱动控制卡,结合变频器,用编码器反馈电机角位移,采用分级调速的方案,可以解决交流电机变频驱动的定位问题。
2.
To introduce reason for appearing harmonic wave, characteristic, spreading way and harm to consumers caused by DC or frequency conversion driving equipment for processing steel wire and cable during producing.
介绍金属线缆加工工艺所使用的直流、变频驱动设备在生产过程中产生谐波的原因、特性、传播方式及对用户的危害,详细阐述合理有效的治理措施以及实际治理的工程案例。
6) Variable frequency motor
变频电动机
1.
With country economy increasing, electric and electronic technology advancing rapidly, variable frequency motor begins to apply in such industry as machine tool, metallurgy, electric power, pulling, chemical industry, textile industry, water supply, paper making, building material, agriculture, and so on, and it is much evidently energy-saving.
随着国民经济的增长,电力电子技术的突飞猛进,在机床、冶金、电力、牵引、化工、纺织、供水、造纸、建材和农业等行业的发展开始大量应用变频电动机,节能效果显著。
补充资料：厂用电受电
厂用电受电
energizing of auxiliary power system
chongyongd一on sho一Jd一on厂用电受电(energizing of auxiliary powersystem)机组附属设备安装完毕后需通电试运行，所需厂用电源由外部供给，因此厂用电受电是调试工作开始的标志。 受电步骤新建电厂先由电力系统向变电站供电，再依次对高压起动/备用变压器、3~10kv厂用配电装置、厂用工作变压器及380V配电装置供电。扩建电厂因高压起动/备用变压器已经投人运行，故可利用它的电源对扩建的厂用配电装置等供电。 调试项目主要有:①用额定电压依次对空载线路、变电站母线、隔离开关、断瘩器、互感器、变压器及厂用配电装置等进行冲击合闸试验。有条件时.冲击合闸前应先进行递升加压试验。升压过程中注意检查各设备有无放电声及短路现象，发现问题及时处理后再进行升压。②检查三相电压应平衡，相序应正确，各段母线的相位彼此应一致。对配电装置供电时，有时会由于母线电容和与母线连接的电磁式电压互感器的电感相互作用而出现铁磁谐振，此时相电压升高，中性点明显位移。为消除谐振可在电压互感器的剩余电压绕组处并联电阻以去振。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条