查询词典 powerful current

The current for pantograph shall be increased especially for the metro vehicle equipped with the third rail current collector.

需要增加受电弓受流，特别是对采用第三轨受流器的地铁列车。

Therefore, if we have a way of holding emitter current constant through a transistor, the transistor will work to regulate collector current at a constant value.

于是，只要我们能让晶体管的发射极电流保持恒定，它就能保持发射极电流为恒定值。

We know that in a transistor operating in its active mode, collector current is equal to base current multiplied by the ratio β.

我们知道，当晶体管工作在放大区时，集电极电流等于基极电流乘以系数β。

We've seen already how maintaining a constant base current through an active transistor results in the regulation of collector current, according to the β ratio.

我们已经看到有源晶体管的恒定的基极电流是如何以系数β控制集电极电流的。

How to eliminate the disturbance of the influence which creates to the current collector, provide the pure power source for the current collector, is a problem which each UPS manufacturer faces.

如何 消除各种各样的干扰对用电设备造成的影响，为用电设备提供高可靠性、高质量的纯净电源，是各 UPS 厂商面对的问题。

How to eliminate the disturbance of the influence which creates to the current collector,provide the pure power source for the current collector,is a problem which each UPS manufacturer faces.

如何消除形形色色的干扰对用电设备造成的影响，为用电设备提供高可靠性、高质量的纯净电源，是各UPS厂商面对的问题。

AMPLIFIER input bias current, a function of TRANSISTOR current gain, is also a function of the applied input common-mode voltage.

放大器的输入偏置电流，晶体管的电流放大作用，也具有加到输入共模电压的作用。

According to the characteristic of matrix converters, strategies for reducing common-mode voltage in current-controlled MC are proposed based on the hysteresis current control and space vector modulation.

在滞环电流和空间矢量复合控制的基础上，针对电流控制型矩阵变换器自身的特点，提出了一种抑制共模电压控制策略。

Due to the constraint of both high current and high speed, it is difficult to commutate for high-speed and high-current DC machine .

1前言 换向问题是直流电机的固有问题，换向过程十分复杂，影响换向的因数很多。

In order to solve the application problem of conduction heating machining, this project investigates some problems, such as dynamic characteristics of heating power, features of circuit current and voltage, arc discharge states and so on. It also studies control characteristics of Uni-phase or Tri-phase Direct Current Power Supply and Inverse Switch Power Supply. A High Frequency Inverse Switch Commutate Power Supply is developed.

为了解决导电加热切削的应用问题，从加热电源的动态性能和回路的电流、电压特性及电弧放电状态等方面进行研究，分析比较了单、三相交直流电源和逆变开关电源的特点和控制特性，研制了高频逆变开关整流电源。

Panorama Many people are dancing in a large sitting room.

在一个大客厅里，许多人在跳舞。

We fully understand how a microwave oven cooks food, it is first necessary to talk ...

我们充分理解一个微波炉煮的食物，这是首先要谈。。。