正弦波

The power source of 60 Hz composed of the universal frequency converter and special sinusoidal electric wave filter and reactor may be used in submersible pump test within a certain range.

用普通变频器和专用正弦波滤波器、电抗器组成的60 Hz电源，在一定的范围内，可作为潜油电机的试验电源使用。

Under this direction, we developed a kind of inverter power supply, and the parameters are as follows:(1)the input of three-phase alternating current;(2)the output of sinusoidal wave;(3)the frequency of output: 5-25 kHz, which can be adjusted;(4)the voltage of output: 5-20 kV, which can be adjusted.

根据这个特点，我们研制了一种高频、高压的大功率逆变电源，参数如下：(1)三相交流输入；(2)输出正弦波；(3)输出频率：5～25kHz，可调；(4)输出电压5～20kV，可调。

According to this work, the two-dimensional field distribution of continuous sinusoidal wave vertically or obliquely radiated by a linear array of five monopole sound sources is numerically simulated in terms of the different initial acoustic pressure .

在此基础上，数值模拟了初始声压强弱不同的5个点声源组成的线阵列垂直或斜向辐射的连续正弦波在大气中传播时二维声场的分布情况。

In the case of sinusoidal wave BDCM, torque pulsation caused by different current errors, such as DC bias, amplitude, phase and function errors, is studied.

对正弦波无刷直流电动机，主要研究了各种电流偏差，例如直流偏置、幅值、相位和函数偏差下的电磁力矩波动。

Simulation results of the circuit with filter indicate decrease of the harmonics in current of power supply, and the waveform is close to sinusoidal wave, which prove correctness of the solution to harmonics pollution.

本论文在此基础之上进行了电力滤波器的设计，在原电路中加入设计好的滤波器再次进行仿真，仿真结果表明，设备电源电流中的高次谐波含量大大减少，波形很接近正弦波，这证明了谐波治理方案设计的正确性。

We put the two main engineering machine loading which are sinusoidal wave load and step load, and the results indicate that the dynamic responds are satisfied for the needs of the experiments. Besides, this paper analyzes the influence effects of the tire friction coefficient on different parameters, and then put forwards the experiment method of the performance of the tire friction.

加载工程机械主要的两种加载模式正弦波载荷和阶跃载荷，试验台动态仿真的结果表明系统动态响应性能能够满足试验要求；此外，论文还对不同路面对轮胎附着系数的影响进行了分析，通过这方面的研究，提出研究轮胎附着性能的试验方法。

The system has not only similar function to the traditional ACDCAC variable frequency system, but also compact structure, small volume and light weight. It can shape the input current into sinusoidal wave, with no harmonic pollution to grid.

其功能类似于传统的变频调速系统，而其结构紧凑，体积小，重量轻，并且输入电流为正弦波，对电网无谐波污染。

To meet the need of saving energy in high-voltage field, New VS-686HV5SD energy saving high-voltage inverters keep to the of original products features : the high efficiency , the high power factor , the sinusoidal wave output etc.

为适应高电压领域节能的需要，新型VS-686HV5SD节能高压变频器保持了原产品的高效率、高功率因数、正弦波输出等特点。

The low phase shift error is critical for measurement of non sinusoidal wave shapes, as found in power quality or sampling digital wattmeter measurement applications.

低相移误差是至关重要的衡量非正弦波形状，在电能质量或取样数字瓦特计测量应用。

The simulation result shows that the system can achieve good sinusoidal output waveform, fast dynamic response and high precision of output current.

仿真结果显示该系统有很好的正弦波输出波形，快速的动态响应和高精度的输出电流。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。