查询词典 harmonics

In order to limit the input current harmonics, many countries have forced to implement some limitation standards.

为了限制谐波污染，各国都强制实施了一些限制输入电流谐波的标准。

The instantaneous reactive current theory is suitable for harmonics detection. Finally, this equipment was successful applied in power substation.

本文最终研制完成了这套煤矿电网谐波综合治理装置，并成功实现了该装置在黑龙江省某煤矿电网的挂网运行。

The MATLAB simulation software is used to model the harmonics detection circuit, which is based on the instantaneous reactive power theory.

通过对基于瞬时无功功率理论的一种谐波电流检测方法的研究，利用MATLAB仿真软件建立了相应的仿真电路，就其中的低通滤波器对谐波电流检测效果的影响进行了仿真研究。

Through analysis to multilevel invertor a method of switching angle control for Diode-clamping Multilevel Inverter is introduced. The quantity of wave for output voltage is improved and the content of harmonics is reduced. And a design is carried on to realize the control mode based on TMS320F2407DSP.

通过分析多电平逆变器的拓扑结构，选择二极管箝位型多电平逆变器为研究对象，提出在二极管箝位型逆变电路中实现开关角控制的方法，该方法减少了谐波的含量，改善了输出电压的波形，并以TMS320F2407DSP为平台进行了设计实现了该控制策略。

The numerical simulation demonstrates that when the intensity of the driving laser is over-saturated,the atom will be ionized rapidly during a few optical cycles,this will lead to a continuous multi-plateau structure in the cutoff region of the high harmonics spectrum from the neutral atom.

通过计算机数值模拟，发现当激光场的强度超过饱和光强时，原子将会在几个光周期内被迅速电离，使得原子的高次谐波谱在截止区呈现出平滑的多平台结构。同时，在高频波段离子产生的高次谐波的影响将变得十分显著。

The numerical simulation demonstrates that when the intensity of the driving laser is over-saturated, the atom will be ionized rapidly during a few optical cycles, this will lead to a continuous multi-plateau structure in the cutoff region of the high harmonics spectrum from the neutral atom.

通过计算机数值模拟，发现当激光场的强度超过饱和光强时，原子将会在几个光周期内被迅速电离，使得原子的高次谐波谱在截止区呈现出平滑的多平台结构。

In this paper a hybrid active power filter method is proposed to suppress the harmonics of a PWM inverter rating 50 kVA. Simulation and experimental result are also given.

针对一台50 kVA变频器谐波源，提出了一种混合有源电力滤波器的谐波治理方案，分析了其原理并进行了仿真和实验。

On the basis of analysis and comparison of conventional and some modern dielectric loss measurement methods in this paper, considering the difficulty consist in the dielectric loss measurement, such as the problem of the locale measurement of dielectric loss the suffering the interference of the electric field in the electrified wire net, the influence of harmonics and the leakiness of frequency spectrum due to the change of the frequency in power supply etc. a new measurement method which the frequency conversion anti-jamming technology combines the fundamental waves phase detachment method is presented.

论文在分析了传统介质损耗测量方法和现代介质损耗测量方法的基础上，针对介质损耗检测中存在的技术问题，如现场测量时工频电网强电场干扰问题、高次谐波影响问题、供电电源频率改变所引起的频谱泄漏和栅栏效应等问题，提出了采用变频抗干扰技术和基波相位分离法相结合的新型测量方法。

By using the hybrid-sensitivity scheme, a H〓 controller is devised and H〓 control in the new MB system is compared with that of PID control. The standard bi-state magnetic bearing amplifier have some disadvantages such as high current harmonics, low reliability and the current mode switching for tri-state amplifier is expounded.

首次将H〓鲁棒控制策略应用于集成化磁轴承系统，详细论述了H〓控制器的设计过程，并与经典PID控制策略进行了比较，表明了H〓控制器优良的抗干扰能力和稳定的鲁棒性。

Now, there are mainly two potential method under research in overseas, magnetic flux leakage method and nonlinear harmonics method.

目前，国外在进行两种机械损伤在线检测技术的研究：漏磁机械损伤在线检测技术和非线性谐波在线检测技术。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。