分数谐波

由于交流电弧炉是一种不平衡的、非线性时变负载，它产生与电压闪变有关的不平衡、谐波和分数谐波，所有这些就需要一种非线性、不对称的动态u&i特性的电弧炉模型。

For AC electric arc furnace is an unbalanced , nonlinear and time variant load that produces unbalance , harmonics and interharmonics related with flicker effect .

而对于电力系统分数次谐波及其危害的研究却比较少。

But fraction-harmonics and their harms in power system is studied less .

分数次谐波分析的算法及其实现

Algorithm and Implementation of Fractional - Harmonic Analysis

计及空间分数次谐波影响的同步电机支路模型

A Branch Model of the Synchronous Machines Considering the Effect of the Fractional Order Space Harmonics

一种分数次谐波分析新算法的研究

Research on a Fractional-harmonics Analysis Algorithm

说明系统运动非线性产生的分数次谐波，是诱发噪声的直接原因。

The result shows that nonlinearity of the system induces the fractional harmonic which roots in the noise .

存在分数次谐波时，差分滤波求得基波分量幅值和相角的误差最小。

The error of fundamental component and phase angle calculated by means of differential algorithms is the minimum value when fractional harmonic exists .

研究分析表明：含有分数次谐波的波形具有周期大于工频周期，且为工频周期整数倍的特征。

The research suggests the cycle of the wave which include fraction-harmonics is longer than base cycle , and is integer times than it .

对定子作有限元分析，得到定子的一阶模态频率为10.74kHz，与噪声频率非常接近，表明分数次谐波激发了定子共振，为噪声输出提供了能量源。

The finite element analysis of the stator indicates that the energy of the noise comes from the resonance of the stator at 10.74 kHz .

因而，新窗函数谐波分析方法特别适用于分数次谐波分析，且能提高弱谐波信号的分辨能力和准确度。

So it can be applied to fractional-harmonics analysis more preferably and therefore improve the resolution capability of weak harmonic component and accuracy of harmonic analysis .

采用超发光二极管作为光源，2个检测通道共用1根光纤，通过光源调制实现气体的体积分数的谐波检测技术。

Super luminescent diode is used as a light source and two detecting channels share a segment fiber , and light source modulation harmonic measurement is presented for detecting the gas volume fraction .

针对信号中非周期分量，频率偏移，分数次谐波对基波分量计算精度的影响，对傅里叶、差分滤波和并联补偿3种滤波算法进行了分析比较。

With regard to the accuracy affection during fundamental component calculation caused by aperiodic component , frequency deviation and fractional harmonic in signal , the paper analyzes and compares three filter algorithms of Fourier algorithm , differential filter algorithm and shunt compensation algorithm .

永磁同步直线电机分数槽绕组谐波分析和齿槽力研究

Study on the Slot Effect of Permanent Magnet Synchronous Linear Motors

交流电机空子分数槽绕组的谐波磁势问题

Harmonic Magneto-motive of Fractional-slot Stator Winding or AC Electric Machines

该文提出的整数N进小波变换和分数小波变换，可以提取信号的任何整数次和分数次谐波分量，具有比二进小波变换更强的信号处理能力和灵活性。

In this paper , both integer N wavelet transform and fractional wavelet transform are presented . Compared with dyadic wavelet transform , they possesses stronger abilities on signal processing and flexibility .