查询词典 threshold voltage

If the system voltage starts to rise above the desired value, the control circuit will automatically decrease the field excitation and reduce this high voltage by absorbing reactive power.

若系统电压开始升高超过要求值，控制电路就自动降低励磁电流，通过吸收无功来降低电压

This dissertation gives a special research in microcomputer relay protection for power transformer of 110kV or below voltage ratings, which based on widely summarizing the theory of power system relay protection and its advanced trend. After analyzing the working character of the transformer in details and absorbing the advantages in other power transformer protection, a scheme which is fit to power transformer of 110kV or below voltage ratings is put forward.

本文在全面介绍和评述电力系统微机保护原理及其发展趋势的基础上，对电力系统中大量应用的110kV及以下各电压等级的变压器保护进行了专门研究，根据这一类电力变压器的运行特点，吸取以往各种保护方法的长处，提出了这类电力变压器保护方案。

In this article,the authors analyze the aiguille voltage of the whole-bridge DC source converter circuit according to the mathematics model when the MOSFET transistor is shut and the instant voltage equations are obtained.

对直流电源变换器的常用电路型式进行了具体工作过程分析；根据所建立的数学模型，分析MOS管关断瞬间的尖峰电压，得出其瞬间电压方程，并应用PSPICE软件的仿真结果对其进行验

"A rectifier converts the power from alternating to direct form, a regulator ensures that the output voltage is properly matched to the battery voltage as engine speed varies."

整流器把电力从交流变为直流形式，调节器在引擎转速不同时确保输出电压与电池电压配合妥当。

First it produces the pulse signal by the multivibratorwhich is consisted of 555 timer and send in the detecting coil to form the alternating magnetic field, then it asopts UGN3503 linear half-effect as prode to the magnetic field change into the voltage signal change,after enlargement electric circuit and peak value examination electric circuit,the signal be treated to send into ADC0809 modulus converter change moduluses, then the digital signal after the modulus converter is changed is sent into AT89C51one-chip computers afterwards, after the digital filter, AT89C51one-chip computers afterwards compares the data to the reference voltage and judges whether to have detected the metal and alarm.

这个系统是以AT89C51单片机为核心，首先由555定时器构成多谐振荡器产生脉冲信号送入探测线圈以形成交变磁场，然后经过线性霍尔器件UGN3503将磁场变化转换为电压信号的变化，经过放大电路和峰值检测电路，经数模转换之后输入到单片机中，由单片机对数据进行软件滤波之后，与基准值比较之后，判断是否存在金属和报警显示。

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。

An electrical device by which alternating curr t of one voltage is changed to another voltage .

交流电从一种电压转化成另一种电压的电力装置。

The test methods based on data acquisition system parameters such as direct voltage, alternating voltage and time interval of were introduced.

这些数据处理方法已成功地应用于某型导弹的自动测试系统，获得了较高的测试精度和良好的应用效果。

An amplitude of an alternating component of the voltage of the electric power signal generated is no greater than one-tenth that of an amplitude of a constant component of the voltage of the electric power signal.

发生的电功率信号的电压的交变分量的幅值不大于电功率信号的电压的常量分量的幅值的1/10。

The quality of service can be measured by service continuity or reliability, uniformity of voltage at the proper level, proper and uniform frequency of the alternating voltage.

供电质量可由供电连续性或供电可靠性，在标准电压等级下的电压均等性，交流电压频率的正确不变性来度量。

These are places without aristocratic baggage; egalitarian places open to talent, self-improving, engaged in learning and innovation through networks that were at once competitive and cooperative.

这些地方没有贵族遗风作祟，而且对于那些有天分的人是开放的平等之地，这些人善于通过那些曾经很具有竞争力与合作精神的关系网进行自我提高以及学习创新。

Christine: You don't want to see me?

你不想见我？