和电路

One is auto-zero and the other is chopping. The chopping amplifier with its many parts of modulation switches, pre-amplifier, band-pass selective amplifier, and voltage follower and demodulation switches is designed. The circuit is simulated with HSPICE to optimize. The residual offset of microvolt and the equivalent input noise PSD of 70 nV /Hz were obtained.

zero和斩波Chopping 对失调和噪声的影响，具体针对传感器的信号要求进行了斩波放大电路的调制，预放，带通选择放大器，电压跟随和解调等各个部分的设计，电路使用Hspice进行了仿真优化，达到了微伏量级的残余失调和70 nV /Hz输入等效噪声PSD。

Then we emphasisly explained the design and development of Dynamical Electrocardiograph, especially the pre-amplifier with high CMRR and high input impudence.

然后重点论述了动态心电仪的软硬件设计和研制，特别是关于高共模抑制比和高输入阻抗的前置放大器的部分；同时也介绍了颇具特色的通讯电路和电源电路的实现。

The reactive current detecting hardware circuit and current tracking controlling hardware circuit based on TMS320LF2407ADSP are designed carefully. The communication with CANBUS between modules is realized, and the main circuits are analyzed and design in detail.

论文设计和实现了基于DSP的无功电流检测和控制器的硬件电路，实现了模块之间CANBUS通信，对一些具体电路进行了详细设计和分析。

Using this method, the thermal analysis of air-core reactor is performed without specifying the convection coefficients at its development stage. Therefore, the experimental cost of air-core reactor is decreased and the design period is shortened.

建立了空心电抗器磁场、电路、流场和温度场耦合计算的有限元模型，将磁场-电路计算得到的焦耳热作为流场和温度场计算中的热源，从而求出了空心电抗器的稳态和暂态温度场分布及最高温度值。

The main principle of the DCcontactor:The electromagnetism coil switches on electricity thetitle iron to match with the iron heart on,the suction of theelectromagnetism system overcomes the counterforce of the springarouses the action of the contact, the main electric circuitconnected;The electromagnetism coil cuts the power the counterforceof the spring arouses the title iron from move to open, the headcontact breaks to open the output electricity arc give or get anelectric shock in drive to arc-extinct-chamber and made longer,thestrong cooling dissociates and put out,the main electric circuitcuts off.

接触器的主要原理：电磁线圈通电，衔铁和铁心吸合，电磁系统的吸力克服弹簧的反作用力带动动触头与静触头接触，主电路接通；电磁线圈断电，弹簧的反作用力带动衔铁和动触头弹开，触头断开产生的电弧在灭弧室中受到磁吹灭弧和电动力驱动被拉长，并强烈冷却去游离而熄灭，主电路切断。

Said invented method for and device adopt MCU or logic or logic chip detecting said ringing current signal, backboard ringing current signal and mutual sent signal, and sequential control sequential control, avoiding switch device hard switching and arcking, raising switch device and backboard reliability.

本发明方法及装置通过采用MCU或逻辑芯片检测本板铃流信号，背板铃流信号和互送信号，并采用时序控制，避免了在铃流开机和切换时的开关器件硬切换，以及铃流的在开关电路切换时的拉弧，提高了开关器件的可靠性；而且把开关电路从通讯设备插框背板转移到单板上来，提高了背板的可靠性，降低了后续的维护和检修困难。

The resonant phenomenon of Bridgeless Boost PFC with split inductor s is analyzed using experiments, simulation and equivalent circuit methods.

通过实验、仿真和等效电路模型分析方法对分立电感无桥Boost PFC电路电感电流上叠加有高频谐振电流的现象做出了详细的分析和研究，指出高频谐振是PFC分立电感与电路的寄生电容组成LC振荡回路所引起的，确定了谐振电流的路径和谐振频率的大小。

Based on situation of teaching and learning of coreless transformer and structure study of coreless transformer,the equivalent circuit of coreless transform based on CCVS is constructed.

结合空心变压器的电气分析在教学中的特点，分析了空心变压器的基本结构和基本特点，运用电流控制电压源 CCVS对之进行了等效变换，然后将空心变压器的输入电路和输出电路看成一端口，运用戴维南定理分别对其输入端口和输出端口等效成一个电压源与一个电阻的串联形式，并进行了详细的讨论

The engine main circuit have to be gurranteed drawing the torque of electric motor and rotation speed wholly to do regulateing of independence ,But also possess extensive setting range SS7's mould electric locomotive adopts Quan Kongqiao and semi bridge accuseeing series connection to make up the monophase bridge style commutation electric circuit ,The coil power supply is encouraged against the stringtrain by the electric motor the drawing armature to 3 parallels operation ,Still there is an excitation commutation bridge ,He encourages the coil power supply with 3 electric motors drawing together to the series connection ,Moreover has one another accuses the regulating action .

机车主电路必须保证牵引电动机的转矩和转速都可作独立的调节，而且要有宽广的调节范围。SS7型电力机车采用一个全控桥和一个半控桥串联组成单相桥式整流电路，向3台并联工作的牵引电动机电枢与串励绕组供电，还有一个励磁整流桥，向串联在一起的3台牵引电动机他励绕组供电，并具有相控调节作用。可以实现机车无级调速和无级削磁。SS7型电力机车采用再生制动方式，再生制动时，牵引电动机作直流发电机工作，并且将电能馈送回接触网，此时电力机车相当于一个移动的发电站。

This dissertation introduces the history, key technology, current status of nation and internation ,and the importance of MiroSot ; describes function theory and constitutes of MiroSot resumptively firstly ; then introduces machine structure in detail including the characters and choice of electromotor and the design and facture of hull; stresses on control circuit of soccer robot including the choice of control circuit and DSPs, basic circuit of soccer robot and control algorithmic of soccer robot.a new design based on DSPs is made; lucubrate radio communication subsystem including the origin of yawp and controlled method in radio communication finally, and a emitter is made, and hard base has gained to upbuild experiment bed of MAS.

本论文首先简要地介绍了机器人足球比赛的发展历程、所涉及的关键技术和研究意义，概括地描述了MiroSot系统的构成；然后系统地研究了足球机器人机械结构的设计、电动机的选择、壳体的设计等，重点研究了MiroSot足球机器人的控制电路，包括DSPs芯片的选择、足球机器人硬件电路的设计和控制算法的编写，在此基础上研制了基于DSPs的足球机器人；最后深入研究了无线通讯子系统，包括无线通讯干扰噪声的来源及其抑制方法，无线发射器软、硬件的设计和制作，为全面建立多智能体系统实验平台奠定了基础。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。