查询词典 electric circuit

And the main circuit chart used microsoft office visio to draw up, has realized the filter circuit, the leveling circuit, the contravariant electric circuit's composition design.

其中主电路图使用了microsoft office visio来绘制，实现了滤波电路、整流电路、逆变电路的组成设计。关键字：单片机 V/F控制 HEF4752

In order to understand and calculate the reactive power of the nonsinusoidal electric circuit accurately and analyses the the influence of the reactive power in the nonsinusoidal electric circuit on reactive energy measurement .

为了能够准确地理解和计算非正弦电路的无功功率，分析非正弦无功对无功电能计量的影响。

College of Electrical Engineering, Zhengzhou University摘要: In order to understand and calculate the reactive power of the nonsinusoidal electric circuit accurately and analyses the the influence of the reactive power in the nonsinusoidal electric circuit on reactive energy measurement .the calculation formula of the reactive power is concluded by means of the Fourier analysis method.

为了能够准确地理解和计算非正弦电路的无功功率，分析非正弦无功对无功电能计量的影响，本文采用傅立叶分析方法，导出非正弦电路的无功功率的计算公式，分析了公式中每一项的物理意义。

Carry on a mold piece to turn analysis to the UPS, among them, the point introduced to carry out the design and realization which flaps to concuss an electric circuit mold piece and goes against to change an electric circuit mold piece and SG3524 mold piece of the related sine wave with topic.

对UPS进行模块化分析，其中，重点介绍了与课题实现相关的正弦波发生器模块、逆变电路模块和SG3524模块的设计与实现。

It introduces a kind of novel loading test system, based on the operation principle of damper. this loading system is operated by the driving motor. it realizes the loading, in that the damper has a negative drive force that puts on the motor. Based on the ordinary electromagnetic damper, the thesis presents a novel hybrid excitation electromagnetic damper which has adjustable work characteristic, analyses the working principle and structural feature of the electromagnetic damper, deduces the formulas to calculate the eddy current density through the Electromagnetic theory, analyses the distribution of the eddy current in the cotyloid rotor, and also studies the method of calculating the damp torque, establishes the mathematical model of the electromagnetic damper, analyses the relationship between the electromagnetic damper structural parameter and damp torque, researches the engineering design and analysis method of the electromagnetic damper, provides theory foundation for the design and analysis of the electromagnetic damper, contrives a hybrid excitation electromagnetic damper that satisfies the target request, designs a set of compound excitation electromagnetic damping loading control system whose control core is AT89C51 monolithic integrated circuit, analyses the electric circuit part, and carries on the experimental test to this set of electric circuits. Finally it debugs this electromagnetic damping loading system, this system satisfies the target request proposed.

论文提出了一个全新的加载测试系统种类，该加载系统是在阻尼器工作原理基础上，利用电动机拖动阻尼器运转，从而阻尼器产生一个与运动方向相反的阻尼力矩，该力矩作用在电动机上实现对电动机加载测试；同时，论文在一般电磁阻尼器基础上提出了一种新型的可调式复合励磁电磁阻尼器结构，该种阻尼器的工作特性在一定范围内可进行调节；论文分析了电磁阻尼器的工作原理和结构特点，运用电磁场理论分析推导了电磁阻尼器的涡电流密度公式，分析了涡电流在转子杯内的分布图，并对阻尼力矩计算方法进行了研究，建立了电磁阻尼器的数学模型，分析了电磁阻尼器结构参数和阻尼力矩之间的关系，对电磁阻尼器的设计和分析方法进行了研究，为电磁阻尼器的工程设计建立了理论基础；设计了满足技术指标要求的复合励磁电磁阻尼器和一套以AT89C51单片机为控制核心的复合励磁电磁阻尼加载控制系统，对该控制系统硬件电路各部分进行了分析和设计，对软件进行了设计，并对控制电路进行了试验调试，该系统满足所提出的加载指标要求。

This system of another a characteristics is, the manifestation electric circuit is an serial static appearance show electric circuit, application moving first deposit the machine a can realize string- and, using 8 figures for receiving single-chip-machine sending outs tube manifestation type matrix, this provided the more friendly man-machine interface for the customer, the convenience proceed to the measured value observational, adopt the homologous operation.

本系统的另外一个特点是，显示电路是一个串行接口的串行静态显示电路，应用移位寄存器74LS164能够实现串-并的特点，用8个级联的74LS164来接收单片机发出的数码管显示字模，这为用户提供了更为友好的人机界面，方便对测量值进行观察，采取相应的操作。

This system of another a characteristics is, the manifestation electric circuit is an serial static appearance show electric circuit, application moving first deposit the machine a can realize string- and, using 8 figures for receiving single-chip-machine sending outs tube manifestation type matrix, this provided the more friendly man-machine interface for the customer, the convenience proceed to the measured value observational, adopt the homologous operation.

本系统的另外一个特点是，显示电路是一个串行接口的串行静态显示电路，应用移位寄存器74LS164能够实现串-并的特点，用8个级联的74LS164来接收单片机发出的数码管显示字模，这为用户提供了更为友好的人机界面，方便对测量值进行观察，采取相应的操作。对于系统单片机的配置，我选用了被动串行模式。这是因为FPGA作为从属器件，主要是由单片机提供配置所需的时序，实现配置数据的下载。

Finding the solution to the problems of DC electric circuit by using Protel 99se emulation can be done first through setting up Emulation Analysis Session Block,then by the actual operation of emulation, which,superior to the other CAD software,can lead to the total solution to all the problems of DC electric circuit.

用Protel99se仿真求解直流电路问题，可以通过设置仿真分析对话框，然后运行仿真来进行。并且相对于其他电路CAD软件，可以一次性得到直流电路全部解。

The designing of this article first introduced the determinant keyboard's theory and application,through to analysis its connection electric circuit in very great detail ,and then used VHDL hardware description language and FPGA device to complete FPGA-based determinant keyboard connection electric circuit design with modular design mathod.

本文设计首先介绍行列式键盘的原理和应用，通过对其接口电路的详细分析；然后利用VHDL硬件描述语言和FPGA器件并采用模块化设计的方法完成了基于FPGA的行列式键盘接口电路的设计；最后通过计算机仿真，对本文设计的行列式键盘接口电路的正确性进行了验证。

This article mainly introduced the IGB T application electric circuit, with, when has the disruptive discharge IGB the T electric current's limit and the protection circuit, realize the high frequency high-pressured pulse power source's overall design.

本文主要介绍了IGB T的应用电路，和当发生击穿放电时 IGB T 过电流的限制及其保护电路，实现高频高压脉冲电源的整体设计。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。