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直流励磁
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  dc excitation
     THE ITAE OPTIMAL CONTROL OF DC EXCITATION SYSTEM FOR A SYNCHRONOUS GENERATOR
     同步发电机直流励磁系统ITAE最佳控制
短句来源
     Application of Monopole PWM Bridge DC Convert Circuit to DC Excitation System
     单极性PWM桥式直流变换电路在直流励磁系统中的应用
短句来源
     Secondly, a simplified equivalent magnetic circuit model of proposed DFDSPM is set up to illustrate the principle of operation, the relationship among the reluctance of the auxiliary airgap, the DC excitation MMF, and the airgap flux regulating range.
     第二,建立了DFDSPM电机的等效磁路模型,阐述了该电机的工作原理,确定了辅助气隙长度、直流励磁磁势与磁通调节范围三者之间的相互关系;
短句来源
     At last, based on above theories a prototype of HEPMSG with rated power 7.5kW and four poles is manufactured. Experiment results and theory analysis is almost same and output voltage of generator is effectively adjusted by regulating the DC excitation current, which shows the theory of HEPMSG is feasible.
     在上述研究的基础上,本文设计制造了一台7.5kW、4极混合励磁永磁同步发电机样机,实验结果与理论分析基本一致,通过调节直流励磁电流能够有效的调节发电机的输出电压,表明永磁同步发电机采用混合励磁结构是合理和可行的。
短句来源
     Making use of the advantage of small current pulsation of monopole PWM bridge DC convert circuit,combining the technique of microprocessor,applying to separate power supply in DC excitation system,it's convenient to implement the manipulation of non-contact-commutation,it has quick response and it can fulfil the requests of the system to excitation.
     利用单极性PWM桥式直流变换电路所具有电流脉动小的优点,结合微处理技术,应用在独立电源供电的直流励磁系统中,便于实现无触点化换向操作,且动作响应快速,更好的满足系统对励磁部分的要求。 单极性;
短句来源
  “直流励磁”译为未确定词的双语例句
     It can be used in many fields, such as AC/DC motor drive, DC magnetization, active power filter and power factor correction.
     其应用场合包括AC/DC电动机传动、直流励磁、有源电力滤波、功率因数校正等许多领域。
短句来源
     This paper analyses the condition of switching surge tes1 for 500kV transformer and presents that it is helpful to improve the accuracy of the test result by exciting transformer with DC supply instead of the traditional switching impulse.
     分析了500kV变压器进行操作冲击试验的现状,提出用直流励磁法代替传统的操作冲击励磁法,有助于提高试验结果的准确性.
短句来源
     Current situation of switching impulse test for 500 kV transformer is analyzed in this paper, and the DC magnetization method is presented to take the place of the switching impulse.
     分析了500kV变压器操作冲击试验的现状,提出用直流励磁法代替传统的操作冲击励磁法。
短句来源
     The scheme had been used to a 350 kW synchrous motor and a very satisfying performance is achieved Excited magnet voltage was adjustable at 40%~100% of full range.
     该电机的励磁电压仅需在满量程的40%~100%范围内可调。 该方案适用于焊接和同步电机的直流励磁等场合。
短句来源
     Nd2Fe14B alloy thin film is prepared by means of direct current magnetization magnetron sputtering, in which substrate is preheated and continuous dynamic heating is conducted during sputtering.
     采用直流励磁磁控溅射法制备Nd2Fe14B稀土永磁薄膜。 通过对衬底预热,在溅射过程中持续动态加热并保温10min,实现定向沉积。
短句来源
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  相似匹配句对
     Excitation Protection for D.C.Motor
     直流电动机的励磁保护
短句来源
     Design of DC generator excitation controller
     直流发电机励磁控制器的设计
短句来源
     adjustment of field excitation;
     励磁调节;
短句来源
     Basic Direct Current Circuits
     直流电路
短句来源
     Excitation Mode of Medium and Small Hydraulic Generator
     中小型水轮发电机励磁
短句来源
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  dc excitation
The total broadband noise power under pure dc excitation and the effects of harmonic mixing due to two strong ac signals at frequencies ω and 2ω are also evaluated.
      
Therefore, it has been activated by single and double presynaptic impulses, by pulse trains and by DC excitation (inhibition).
      
DC excitation (inhibition) simulates the case that there are very many excitatory (inhibitory) synapses activated alternately by pulse trains of high repetition rate.
      
Flexoelectric origin of oblique rolls with helical flow in electroconvective nematics under DC excitation
      
We present a 3-dimensional, linear analysis of electrohydrodynamic (EHD) roll instability in a nematic liquid crystal under DC excitation.
      
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Electro-eddy current non-contact vibration exciter model 78, applicable to both magnetic and non-magnetic metals, is developed for blade frequency inspection.This paper illustrates the principle, performance and characteristics of the electro-eddy current vibration exciter, with detailed accounts of various tests that have been made during its development, such as the tests of magnetic pole types, of electric analog of magnetic field, of the influence of gap between two magnetic poles, of magnetic field excited...

Electro-eddy current non-contact vibration exciter model 78, applicable to both magnetic and non-magnetic metals, is developed for blade frequency inspection.This paper illustrates the principle, performance and characteristics of the electro-eddy current vibration exciter, with detailed accounts of various tests that have been made during its development, such as the tests of magnetic pole types, of electric analog of magnetic field, of the influence of gap between two magnetic poles, of magnetic field excited by AC and DC and of the excitation effect on different relative positions between the blade and the exciter. Presented at the end of the paper are an investigation of the impedance matching of the exciter with the power amplifier and results of inspection, with the exciter, of the natural frequency of blades made of aluminium alloys, Ti-alloys, stainless steel and heat-resisting alloys.

“78型”电涡流激振器属于非接触式叶片测频设备,适合于磁性和非磁性金属材料。 本文阐明了电涡流激振器的工作原理、性能特点及其在研制过程中所做的各种试验,如磁极型式,磁场的电模拟,磁极的气隙尺寸,交、直流励磁强度和激振器对叶片的相对位置等等试验。最后,介绍了电涡流激振器与功放的阻抗匹配和用该激振器对铝合金、钛合金、不锈钢、耐热合金等各种叶片进行测频试验的结果。

This paper describes a new method of static demagnetization of synchronous machines, its scheme, principle, numerical and experim-ental results. In case of an accidental fault in the interior of a synchronous machine, it is not necessary to disconnect the rotor winding with the exciter circuit, we may insert an oscillation resist-ance in the armature circuit of the exciter, as shown in Fig, 1, After insertion, all field currents and voltages of the system will start oscil-lating and will vanish after a short...

This paper describes a new method of static demagnetization of synchronous machines, its scheme, principle, numerical and experim-ental results. In case of an accidental fault in the interior of a synchronous machine, it is not necessary to disconnect the rotor winding with the exciter circuit, we may insert an oscillation resist-ance in the armature circuit of the exciter, as shown in Fig, 1, After insertion, all field currents and voltages of the system will start oscil-lating and will vanish after a short time.

本文介绍一种新型快速灭磁方法,即利用静止开关来改变直流励磁机的极性,形成振荡,故称静止振荡灭磁。本文列出了振荡灭磁的原理、接线图、灭磁计算和实验结果。计算和实验表明:在相同转子过电压情况下,振荡灭磁速度都较电阻灭磁的速度快一倍左右,同时还可削弱阻尼绕组和发电机剩磁的不利影响。本文还设计了一个自动充磁回路,并利用二极管成功地解决灭磁电阻与励磁回路电阻的配合问题。

There are some differences among the time constants of synchronous machines excited by DC machines which are determined by various test methods. This paper considers that such differences are mainly the result of the influence of DC exciting machines. So it proposes an approximate method trying to cancel the influence. The results of experimets show that the approximate method can depress the differences and improve the identity of the time constants.

在对由直流励磁机励磁的同步电机进行时间常数的测定时,各种不同试验方法所得的结果存在较大的差别,本文认为此差别主要来自直流励磁机的影响,试验结果表明修正后的参数较为一致。

 
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