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电源谐波
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  supply harmonic
     Research on supply harmonic of high power density induction motor equipped with VVVF converter
     VVVF变频器驱动高功率密度异步电机的电源谐波研究
短句来源
     In order to discuss the impact of supply harmonic on high power density induction motor equipped with VVVF converter,harmonic equivalent circuit is used to analyze the impact in this paper,a system model of high power density induction motor equipped with converter is built,simulation result of this motor fed by different source is given,and a method of optimum match between motor and converter is presented.
     为了探讨电源谐波对VVVF变频器驱动高功率密度异步电机运行性能的影响,采用异步电机的谐波等效电路法分析了谐波对电机损耗和转矩的影响,建立了变频器驱动高功率密度异步电机的系统模型,给出了不同电源下电机损耗和转矩的仿真结果及电机和变频电源最佳匹配的方法。
短句来源
     Result indicates that supply harmonic causes more heat,less load and power density to motor.
     仿真结果表明,电源谐波加剧电机发热,降低电机的带载能力和功率密度。
短句来源
  source harmonics
     The harmonic current can be obtained based on instantaneous reactive power theory, and the current hysteresis PWM controller is applied directly to control the main circuit, which can reach the conclusions that the source harmonics current approaches to zero and harmonic suppression is gained.
     利用瞬时无功理论计算出电源谐波电流,并直接进行滞环比较,以控制主电路开关器件的通断,从而使电源谐波电流逼近于零,达到谐波抑制的效果。
短句来源
  “电源谐波”译为未确定词的双语例句
     Study of harmonics reduction by using passive power factor correction method
     电源谐波无源功率因数校正方法的研究
短句来源
     An Analysis on Power Harmonics and Its Solution
     电源谐波分析及治理
短句来源
     Development of reducing harmonic contamination with welding power source
     降低焊接电源谐波对电网污染的研究发展
短句来源
     This system has the advantages of mass information,high speed inspection,good human machine interface,high precsion and flexibility based on the virtual intrumnet technology,and analyzes the harmonic current,dynamic characteristecs as well as realizes real time measurement for function factor and efficiency.
     这种新型检测系统以虚拟仪器技术为实施平台,具有信息量大、检测速度快、人机界面优异、测量精度高、灵活性强等优点,同时实现了对弧焊电源谐波电流、动态特性的分析,以及功率因数、效率等重要参数的实时测量。
短句来源
     The operational status of a 120kVA active power filter (APF) in decreasing the harmonics from exciting power source for heavy-hydronium accelerator is presented.
     介绍了120kVA有源电力滤波器应用于重离子加速器励磁电源谐波治理方面的运行情况。
短句来源
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  相似匹配句对
     An Analysis on Power Harmonics and Its Solution
     电源谐波分析及治理
短句来源
     Harmonic Current Test and Countermeasure
     谐波电源的检测和对策
短句来源
     Power Supplies
     电源
短句来源
     Power Sources
     电源
短句来源
     Harmonic and Administration
     谐波及其治理
短句来源
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  supply harmonic
This results in significantly reducing the supply harmonic current iSh when the feedback gain K is set to be enough high.
      
  current harmonics
The current harmonics determined by Fourier transform are potential-independent.
      
However, application of the STFT transform correctly reflects changes in the current harmonics as the function of potential.
      
And to reduce the output current harmonics, POD PWM control technique was used.
      
And to reduce the output current harmonics, PWM control technique was used.
      
Methods are shown for the improvement of the characteristics of fast-acting magnetic reactors and the broadening of the regulating diapason without increasing the high-current harmonics by changing the construction of the magnetic reactor.
      
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The appearance of surface cross lines on the shadow mask sheet rolled by twenty high mill is discussed in this paper. It is impossible to remove the cross lines completely only by controlling the rolling technique.By observing and testing on line, signal treatment and frequency band analysis, its confirmed that the surface cross lines is developed due to vibration of the rolls.And the vibration is mainly produced by the harmonics of powers source and the effect of gear quality.A plan to solve the problem has...

The appearance of surface cross lines on the shadow mask sheet rolled by twenty high mill is discussed in this paper. It is impossible to remove the cross lines completely only by controlling the rolling technique.By observing and testing on line, signal treatment and frequency band analysis, its confirmed that the surface cross lines is developed due to vibration of the rolls.And the vibration is mainly produced by the harmonics of powers source and the effect of gear quality.A plan to solve the problem has been put in force and the surface cross lines disappeared.

本文对二十辊轧机轧制薄钢带表面出现横纹问题进行了研究。只通过改变轧制工艺,薄钢带表面纹横不能明显好转,因此,通过在线监测、信号处理及频谱分析后确认:钢带表面横纹由轧辊颤振所造成,振源主要为电源谐波,其次是齿轮质量的影响。为此提出了解决方案。方案实施后,钢带表面横纹消除。

This paper introduced a design method of the two-stage input filter used in aeronau- tical static inverter, discussed a check of L-C parameters, computed the harmonic curre- nts of the power source,thus it provied significant theoriaal ideas. The theorical result was verified by the experiment. This analytical method was generallized。

本文介绍航空静止变流器L-C输入滤波器的设计,分析了L、C参数的选取,对电源谐波进行数字计算,从而为滤波器的设计提供了无分的理论依据,实验证实了理论计算的正确性、这种分析方法具有普遍意义。

The power harmonics generated by the cycloconverter in an a.c.excited generation system can be grouped into two sorts:“Load Harmonics” and “Source Harmonics”.In this paper,the natures of these two kinds of different harmonics was analyzed and the detecting methods of voltage datum for the source harmonics were discussed.The optimized topologic structure of hybrid filter was proposed,and finally,the experimental results were given to verify the study.

由交交变频器输出作为交流励磁的发电系统中,输出电力谐波可分为两类:“负载谐波”与“电源谐波”。本文分析了这两类谐波的特性,讨论了电源谐波的检测方法,提出了优化的混合式滤波器结构,对设计中的特殊问题作了详细分析,最后给出了实验结果作为本研究的验证。

 
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