查询词典 ac

Examined is the initiation mechanism of flashover along the surface of polytetrafluoroethylene under AC voltage in vacuum.

以聚四氟乙烯为例研究了交流电压下聚合物绝缘材料在真空中沿面闪络发生前的表面发光特性。

We are the agent of main maker for POTASSIUM CHLORATE , EDTA and AC BLOIWNG AGENT.

本公司注册为免费会员，未通过TradeKey.com验证或认证。

Software design can affect the precision in calculation of power factor, which is made from AC sampling.

在利用交流采样得来的数据进行功率因数角的计算过程中，软件设计对计算结果有很大的影响。

A novel regulated AC power supply unit for base stations using double PWM is presented in this paper. The main circuit and its principle of operation are introduced, and the power flow analyzed.

提出一种新的基于双PWM技术的新型通信基站稳压电源的拓扑结构，并对这种拓扑结构的主电路和工作原理进行了介绍，对其功率流进行了分析。

With high power transistor technology, large-scale integrated circuits and computer technology advances, VVVF AC motor technology has improved. has been widely applied in all walks of life.

随着大功率晶体管技术发展、大规模集成电路和计算机技术的突飞猛进，交流电机的变频调速技术已日趋完善，在各行各业得到了广泛的应用。

For large capacity of inverter, due to the dc bus voltage is higher, ac output generally do not need to boost transformer can achieve 220V, in medium and small volume of inverter, due to the low voltage dc 12V, such as, must design, 24V pressor circuit.

对大容量的逆变器，由于直流母线电压较高，交流输出一般不需要变压器升压即能达到220V，在中、小容量的逆变器中，由于直流电压较低，如12V、24V，就必须设计升压电路。

The speed estimation without speed sensor is an important trend of modern AC drive. This thesis has probed several primary algorithm of speed estimation and analyzed emphatically the algorithm of speed estimate based on model reference adaptive system. The results of simulation prove its feasibility.

无速度传感器转速估计是现代交流传动研究的一个重要方向，本文在探讨了几种主要的转速估计方法之后，着重分析了基于模型参考自适应系统的速度辨识算法，并通过仿真证明了该方法的可行性。

We can inject AC into one end using a little primary coil wrapped around.

我们可以交流注入到一月底利用一个小初级线圈缠。

Transformer is to use the principle of electromagnetic induction to change the AC voltage of the device, the main component is the primary coil, secondary coil and core.

变压器是利用电磁感应的原理来改变交流电压的装置，主要构件是初级线圈、次级线圈和铁心。

In order to describe quantitatively their relative contributions, the kinematic vorticity number is introduced and simply defined as cos v, where v is the angle between two eigenvectors containing the shear directions in the principal deformation plane （XZ-plane or ac-plane）.

为了定量说明两者间的相对贡献，提出了运动学涡度这一物理量，并简单地定义为COSv.v是主变形面内两特征方向间的夹角。

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。