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Achievement of an absolute 0 VDC to 5 VDC input voltage range will therefore require a minimum supply voltage of 4.950 VDC over temperature variations, initial tolerance and loading.

一种绝对的0至5伏直流输入电压范围内实现将因此需要一个温度变化的4.950,初始误差和直流负荷最小电源电压。

In this paper, a BUCK circuit added lead before the full bridge which used in BLDCM drive system is proposed, and this drive system is studied.

在永磁无刷直流电机驱动系统中,本文提出在传统的三相桥前加上BUCK电路,用于永磁无刷直流电机的驱动,并就系统进行了理论分析与实验研究。

After we analyzing the model of BLDCM, the FNN control which adopts Kalman filter arithmetic is applied in the speed controller.

在分析了直流无刷电机数学模型的基础上,将采用了卡尔曼滤波学习算法的模糊神经网络控制应用于直流无刷电动机速度控制器。

Pass the function that study the core controller MCS89C51 and application, constituted to be adjusted by a keyboard/ showing controller 8279, arithmometer/timer 8253 and from ZSZ-02 as mainly controlling the slice of electrical engineering soon system.

核心控制器的主要组成由89C51单片机、键盘/显示芯片8279、可编程计数器/定时器8253以及自整角机角度转换器ZSZ-02;直流电机驱动电路由4只三极管及4只可控硅组成,完成直流电机的调速及正反转。

Commutation failure is one of the most frequent faults in AC/DC systems and continuous commutation failures will lead to closedown of DC system.

换相失败是交直流输电系统最常见的故障之一,连续的换相失败还会引发直流闭锁,影响系统稳定运行。

With the High Voltage Direct Current Transmission rising in China, more and more DC Transmission systems will be built.

随着直流输电技术在中国的发展,越来越多的直流输电系统将要建设。

In this thesis, the device degradation of low-temperature polycrystalline thin film transistor under gate AC stress in off region with drain bias has been investigated.

在这篇论文中,我们研究了低温复晶矽薄膜电晶体在闸极负偏压脉波且汲极直流偏压的劣化,我们观察到在汲极端会有一个严重的劣化,当闸极操作在负偏压交流讯号且汲极直流偏压下会量测到一个电流(在此我们称为pump current)。

This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

本系统以直流电压源为核心,AT89S52单片机为主控制器,通过键盘来设置直流电源的输出电压,设置步进等级可达0.1V,输出电压范围为0—9.9V,最大电流为330mA,并可由液晶屏显示实际输出电压值。系统有过流保护电路,当输出电流过大时功率管自动截至,而且有红色指示灯发出警报。

As a member of the SWIFTL317C family of dc/dc regulators, the TL317C low-input voltage high-output current synchronous buck PWM converter integrates all required active components.

作为SWIFTL317C直流/直流稳压器,该TL317C低输入电压高输出电流同步降压PWM转换器集成了所有的家庭成员需要有效成分。

It is the key problem for studying the exciting current in the transformer under DC bias magnetization.

在直流偏磁条件下变压器励磁电流是研究变压器直流偏磁特性的关键。

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I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时,滚道或滚动元件褪色是很常见的特征。

The lawyer's case blew up because he had no proof.

律师的辩护失败,因为他没有证据。