交流电压

Whereas if the contacts are in series with the alternating circuit, due to the passing zero property of voltage, we must evaluate the condition of contacts according to voltage value.

但当触头接入交流电路中时，由于电压有过零的特征，所以要根据电压有效值来判断触头是打开还是闭合。

If the line voltage is outside of this range ,the Tester may not operate normally or may be damaged .if your AC line voltage is outside of this range ,be sure to convert it into within this range by using an autotransformer or other appropriate means .

如果电压在这个范围以外，测试装置可能无法正常运行或可能损坏。如果您的交流线路电压在这个范围以外，务必使用自耦变压器或其他适当的方法将它调整到这个范围以内。

The product of the effective values of the voltage and current with the cosine of the ''.

伏特量交流电路中电压与电流的有效值以及电流与电压之间''。

Because it uses non linear control,its output of voltage and current contains a lot of high harmonic .

非接触交流调压器利用晶闸管移相控制可方便地调节输出电压的有效值，由于其采用非线性控制方式，使得输出电压和电流存在大量的高次谐波。

By combining both of these with separate output smoothing it is possible to get an output voltage of nearly double the peak AC input voltage.

结合这两种单独输出与平滑它是可能得到接近增加一倍为繁忙交流输入电压的输出电压。

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 topological structure of a new type of static synchronous compensator, which consists of traditional 12-pulse converter and a cascaded H-bridge, is presented. The purpose of designing such a topological structure, which integrates the concepts of multi-level, soft-switching and re-injection, is to reduce the voltage harmonic content at AC side and to solve dynamic voltage balance among the switches connected in series.

介绍一种新型H桥级联静止同步补偿器(static synchronous compensator，STATCOM)的拓扑结构，它由传统的12脉冲变换器和一个H桥链构成，结合了多电平、软开关和注入技术，降低了交流侧电压谐波含量，解决了串联开关动态电压平衡的问题。

This product is applicable to coal mine where has explosible dangerous gas and coal dust,It is used for controlling direct starting stop and reversion of three-phase squierrel cage type asynchronous motor whose rated current up to 400A in system of AC50Hz rated voltage 1140V or 660V, Meanwhile it protects the electromotor and relative circuit, The starter can be combined with firedamp sensor and used to test the consistency of mining working area,the starter will trip when it exceed the limit ;adopt intrinsic safety type circuit for the control circuit; possess the function of local control and remote control by single set and multi sets procedure control; display working voltage current and gas consistency can remember fault parameter

该产品适用于具有爆炸性危险气体和煤尘的矿井中，在交流50Hz，额定电压为1140V或660V ，控制额定电流只400A的三相鼠笼式异步电动机的直接起动，停止及反转，同时对电动机及有关电路进行保护，起动器可与甲烷传感器相连接用于检测才掘工作面的甲烷浓度，当其超限时起动器跳闸；控制电路采用本安型电路；具备单台就地控制与远方控制及多台程序控制功能，能显示工作电压、电流、瓦斯浓度，并能记忆故障参数。

For electric power pulsive shipping, the voltage is not always normal, especially when the main motor is starting, and three-phase bridge commutated circuit is used widely, so, a new method to compute harmonic is developed, which is more accurate and practical, is more adapt to the ship condictions.

因此，本文在上述文献的基础上，对接入电压波形畸变的电网中的三相桥式整流电路进行了分析，采用了一种实用的新方法来计算三相桥式整流器所产生的谐波电流。本方法考虑了交流侧电抗及电网中存在的谐波电压，导出了交直流两侧谐波电流的计算公式。

The instrument is made up of an oscillating detector , which converts the distributed voltage of an insulator to ac signal for further treatment , a singlechip microcomputer unit and a speaker system .

仪器采用振动式探头，把绝缘子的直流电压变成交流信号，处理后，语音直接报出绝缘子的电压值。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。