偶次谐波

其次，运用傅里叶变换观察两种情况下的频谱特征，并比较发生故障电弧时奇次谐波含量和偶次谐波含量与正常情形时存在的差异。

Fourier transform is used to inspect the frequency spectrum characteristics . A comparison is made for the difference of odd and even harmonic contents respectively under in fault and normal operating conditions .

出现在频谱里的偶次谐波频率来自于法拉第电流响应，偶次谐波频谱的轮廓呈现钟形，在某一特定频率处对应着一个最大值。

Even harmonic frequencies , which are derived from the faradaic current response , will emerge in the power spectrum . The profile of the even harmonic power spectrum is parabolic and shows a maximum at a certain frequency .

消除偶次谐波的三电平SVPWM调制方法及其实现

A SVPWM Strategy and its Implementation Considering Eliminating Even Order Harmonics for Three-level Inverter

半波对称FFT算法针对半波对称性信号只含奇次谐波分量的特点，在算法流程中省去了偶次谐波分量部分。

The algorithm of half-wave symmetric FFT omits the even harmonics because the half-wave symmetric signals only have odd harmonics .

差补调制方式控制的H桥能够输出3种电平，能够消除大部分低次谐波及所有的偶次谐波，主要谐波频带远离基波，且范围是两电平的2倍。

Most low order harmonic and all even order harmonic can be cancelled in H-bridge output with this method , and main harmonic band is far from the fundament frequency .

采用两个GaAs肖特基势垒二极管反向并联的结构实现三次倍频的方案，这种平衡倍频电路结构能够将输入频率的偶次谐波抵消掉，从而大大降低电路中的杂波量。

GaAs Schottky barrier diodes which constitutes anti-parallel pairs structure was used to realize the frequency tripler . Balanced Frequency tripler can suppress the even-order harmonics so effectively that the amount of clutter has been greatly reduced .

由于交流供电在所加电压的每半周是完全对称的，所以这种原理所导致的HUM成分会两倍于市电频率（以及市电频率的偶次谐波）。

Since heating power is symmetric for each half cycle of applied voltage , the principle component of this hum is twice the line frequency ( and even harmonics of the line frequency ) .

鉴相型容栅传感器由偶次谐波所引起的原理性测量误差的分析

Principle Error Analysis of Phase Modulated Capacitive Transducer Arising from Even Harmonics

进一步研究偶次谐波幅值与△a的函数关系。

And further study the function relationship between amplitude-frequency of oven number harmonics and △α .

在一根铁芯上缠绕激磁线圈和感应线圈，即成为磁通门探头。在激磁作用下，感应线圈出现随环境磁场强度而变的偶次谐波分量电势的特征。

A iron core winded by the excitation coil and the induction coil becomes a fluxgate probe .

得出结论：自生磁场对强激光在欠稠密等离子体中产生的相对论相干谐波辐射有重要作用，自生磁场激发偶次谐波辐射，并对奇次谐波辐射产生影响。

Results show that the self generated magnetic field excites even harmonics and influences the odd harmonics .

在平衡电路中，节点处奇次谐波流过差分路径。偶次谐波流过共模路径。

In any balanced circuit , odd harmonics circulate in a differential path , while even harmonics flow in a common-mode path .

发现由于双色场的相干效应，在其谐波谱中不仅产生了奇次谐波，还产生了偶次谐波和半整数次谐波。

It is found that there exist odd harmonics , even harmonics and semi-integer harmonics due to the coherent interaction between two colors .

结果表明，纹波可以分为由电路非对称性产生的奇次谐波和电容器充放电产生的偶次谐波。

The results showed that the odd harmonics of the ripple was due to the circuit asymmetry and the even harmonics due to the charge-discharge process of capacitors .

当倍频场光强增加到基频场的25%时，奇（偶）次谐波开始出现同增同减的关系。

When the intensity of the second-harmonic is increased to 25 % of the fundamental field , the odd-order and even-order harmonics start to be modulated in the same way .

应用异或逻辑运算，对输入信号进行非线性变换，产生偶次高阶谐波分量，实现二倍频功能。

The input signal is nonlinearly transferred through the function of XOR gate , so higher even order frequency components are gotten .

提出了可滤除偶次和分次谐波的B样条小波滤波算法，将经过滤波预处理的短窗傅氏算法和传统傅氏算法进行了比较。

A novel algorithm that can filter even number and non integer number harmonics using B spline wavelet is introduced in this paper .