大型电动机应当使用三相交流电。
应用领域：中大型电动机，发动机，车床主轴等。
Application: Medium and large size electromotor, engine, principal axis of machine tool and so on.
这为评定大型电动机主绝缘的剩余寿命提供了参考依据。
The results provide a basis for the evaluation of the residual life of large motor winding insulation.
阐述了大型电动机高阻抗差动保护原理及整定原则和整定实例。
This paper expatiates the principles, setting and application of high impedance differential protection in large motor with whole solid setting cases.
通过对某大型电动机轴承的故障检测及分析，提出了相应改进措施。
The mechanical fault of some large motor bearings are detected and analyzed, the corresponding improvement is proposed.
在实际的操作过电压冲击过程中，操作冲击波在大型电动机绕组中的传播过程和操作过电压在输电线路中的传播过程非常相似。
In the process of the over-voltage surging to the motor, it transmits in the stator like transmitting in the transmitting line as a wave.
介绍了大型火电机组高压厂用母线切换时的情况，对大型异步电动机切换时的暂态过程进行了数学分析，介绍了减少切换时冲击电流的方法。
When the HV station service bus is switching, the transient of the large sized asynchronous motor is analyzed and a method of inducing the impulse current is introduced.
通过检查大型悬挂式异步电动机滑动轴瓦锡基轴承合金粘合情况，找出轴瓦存在的质量问题。
By checking the large hanging type asynchronous motor for the gluey condition of babbit of the sliding bearing, a quality problem of the bearing is found.
将热力学方法与电工仪表测算电动机轴功率方法结合起来，可以较准确地测出一台工业用大型水泵的性能。
An in-situ test of large industrial water primps characteristics, which is a combination of thermodynamical method and motor shaft power measurement, is described in this paper.
本文介绍了几种适用于大功率电动机起动的软起动装置的工作原理，对其技术、经济性进行了比较，探讨了软起动装置在大型设施中应用的可行性。
This paper introduced some operation principles of soft start for high power electro motors. Comparisons were also made in technical and economic bases to find application in large facilities.
电机与电器的研究领域包括：电力系统中的大型发电机、电动机，有着广泛应用的中小型电机。
The research domain of electric machinery and electric equipment includes: The large dynamo in power system, electromotor, those who having wide application is medium or small electric machinery.
双绕线式异步电动机传动的牵引机挂钩牵重控制是大型火电厂卸煤系统煤车牵引的一种常见运行方式。
The control of tractor drived by double - winding asynchronous motors hooking and pulling heavy loads is a nomal work scheme .
设计了大型挖掘机械直流电动机激磁电路的转换与控制电路。
A control circuit for transition control in DC motor field excitation on large power shovel has been designed.
利用单板机对大型直流电动机检测和保护，避免了不必要的经济损失。
Checking and protecting large main rolling mill direct current dynamo By SBC, economy loss was avoided.
电力系统中的大型发电机和电动机的转子及轴的加工问题，始终是电机制造过程中的关键技术。
The processing problem related to the rotor and axis of the heavy generator or motor, which are used in electric power system, is always the most important point in motor manufacturing.
广泛用于大中型电动机压装，提供转子、定子压装及定子矽钢片定位、成型的压装，以及大型物件的压制、压延、拉伸、成型。
Widely used in large and medium-sized motor pressing, rotor, stator voltage and the stator silicon steel sheet positioning, forming and pressing, pressing, rolling, drawing large objects, forming.
本文介绍了一种解决大型同步电动机起动的电路，详细介绍了起动装置的组成以及起动过程实现。
The paper presents a kind of circuit to solve the starting of the high capacity synchro motor, and introduces the formation of the starting device and th…
介绍了带死区的开关量控制在大型曲轴电渣溶铸中驱动电动机，以实现自耗电极的自动进给要求。
It is presented that the switch control with dead limits drives a motor to accomplish the control requirement of automatic feeding of cousumable electrode in electroslag casting of heavy crankshaft.
介绍了带死区的开关量控制在大型曲轴电渣溶铸中驱动电动机，以实现自耗电极的自动进给要求。
It is presented that the switch control with dead limits drives a motor to accomplish the control requirement of automatic feeding of cousumable electrode in electroslag casting of heavy crankshaft.
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