查询词典 Ac

According to the mathematical model of AC induction motor,the static measurement of electrical parameter for AC is achieved by pulse method.

文章根据异步电机的数学模型，采用脉冲法实现了电机基本物理参数的静态测试。

The measurement calibration service for ac voltages in the millivolt ranges was previously provided only in the frequency range from 40 Hz to 10 kHz, where suitable calibrated ac voltages were produced by means of an inductive voltage divider.

为在毫伏范围内交流电压服务的计量校准只由从40赫兹至10千赫的频率提供，在这个频率范围内交流电压的合适校准是由归纳分压器的方式产生。

The RMS—to—DC transformation is used for collecting virtual value of Ac. The voltage election elects the range of voltage. The analog—to—digital transformation realize transformation of measured voltage to corresponding digital figure. Finally the Sample Digital Display Ac Millivoltmeter is obtained.

其中RMS/DC专用芯AD637用来采集交流有效值转换，电压范围选择模块选择电压量程，模数转换使测量电压转换，最终得到所要求的数字显示交流毫伏表。

AC-DC-AC drive technique ; locomotive ; motor coach ; asynchronous traction motor ; radial bogie.

交－直－交传动技术；机车；动车；异步牵引电动机；径向转向架

This controller can be used not only in ordinary AC motor-driven,it can also drive ordinary AC motor in a small frequency range.

这种控制器不但可用于一般交流变频电机的驱动，也可以在小频率范围实现对普通交流电机的驱动。

The simple half wave rectifier can be built in two versions with the diode pointing in opposite directions, one version connects the negative terminal of the output direct to the AC supply and the other connects the positive terminal of the output direct to the AC supply.

简单的半波整流可生成两个版本指向相反的方向，二极体、一个版本连接到交流电源负极的直接输出和另正直接输出的终端连接到交流电源。

The numerical simulation result indicates that the condition of which generated APSGD is that the AC voltage frequency is 9kHz when the electrodes configuration is determinate and the sinusoidal peak-to-peak applied voltage is about 9kV. When the AC voltage frequency is about 1MHz, the discharge pattern of SDBD is filament discharge. This results is very important for the development of SDBD.

从数值模拟的结果来看，在确定的发生器电极结构下，当电压的峰-峰值电压为9kV时，发生沿面辉光的条件是电压频率至少为9kHz，而当频率为1MHz时，沿面放电将出现丝状放电的模式，因而这一模拟结果对沿面放电发生器的研制有很重要的指导意义。

This milling machine has fixed cross-rail and column structure. The national patent technology "the new multiple guideway" and CNC universal milling head with AC axes(3axes +2axes) type are applied to it. It can realizes rotate index ±370o at AC axes. Equipped with domestic or imported CNC system and capability, the machine can realize pentahedron machining.

产品采用定梁定柱结构，刚性强；应用《新型复合导轨》国家专利技术和AC轴（3轴+2轴）型数控自动万能铣头核心技术，可实现AC轴±370o自动旋转分度；选配国产和进口数控系统，自动完成多种空间方向的加工，实现五面体加工功能。

The AC power supply unit provides AC voltage for the signal generating unit and the high voltage amplifying unit.

直流电源单元为信号发生单元和高压放大单元提供直流电压。

Based on the fictitious crack model and critical crack tip opening displacement CTODc, the precritical crack propagation length △ac of concrete was determined by means of three point bending beams. According to the calculation value of △ac, the effective fracture toughness KunIc of concrete was evaluated.

本文采用虚拟裂缝模型，将临界裂缝尖端张开位移CTODc作为控制参数，利用三点弯曲梁试件通过迭代求得了混凝土裂缝亚临界扩展量的临界值△ac，据此求得了混凝土起裂断裂韧度KiniIc、等效断裂韧度KunIc值。

The French are not suggesting a new EU treaty, but they have plenty of other wheezes.

法国人并不是在建议签署一个新的欧盟条约，但他们有许多其他的阴谋。

This letter was written by my brother.

这封信是我弟弟写的。