The converters are composed by a conventional forward converter and an additional clamp circuit which is formed with an auxiliary switch and a clamp capacitor. With the help of clamp circuit, the flux in the transformer can be reset without tertiary winding in the converters.
转换器的电路架构是在传统的顺向式电力转换器加入了辅助开关和箝位电容，作为变压器之磁通重置机制，不需要第三匝线圈。
The paper puts forward a kind of photo electricity detector preposition videoplayer and time order gain control circuit, and narrates its work principle, device consideration and calculation.
设计了一种光电探测器前置视放及时序增益控制电路，给出了电路的工作原理、设计考虑及参数计算，解决了高灵敏与误测干扰的问
This article analyzes the temperature characteristic of the semiconductor devices, puts forward the design of a kind of heat leading circuit which can measure the temperature of the chip and lead the heat itself, so it enhances the integration and the cooling efficiency of the high power circuit system.
论文分析了半导体器件的温度特性，提出了一种通过电路自身的特性来测量基片温度，并利用电路结构进行散热的热疏导电路结构，提高了大功率电路系统的集成度及散热效率。
This article analyzes the temperature characteristic of the semiconductor devices, puts forward the design of a kind of heat leading circuit whichcan measure the temperature of the chip and lead the heat itself, so it enhances the integration and the cooling efficiency of the high power circuit system.
论文分析了半导体器件的温度特性，提出了一种通过电路自身的特性来测量基片温度，并利用电路结构进行散热的热疏导电路结构，提高了大功率电路系统的集成度及散热效率。
A signal sent in the forward direction to terminate the call or call attempt and release the circuit concerned.
一种正向发送的信号，它终止任何呼叫或呼叫企图，并且释放相应的电路。
Then, based on the finite state machine models the trigger stability problem of AC voltage-regulate circuit is brought forward. Within this frame, the reliability of existing trigger methods is analyzed and compared, including:(1) double-pulse trigger method synchronized by line voltage, (2) wide-pulse trigger method synchronized by line voltage and (3) double-pulses trigger method synchronized by stator current. The conclusion is obtained that the wide-pulse trigger method synchronized by line voltage with 6-gate triggering separately is the best one, the double-pulses trigger method synchronized by stator current is less reliability than the former, and the double-pulses trigger method synchronized by line voltage can not ensure the circuit work reliability.
在分析了三相交流调压电路的有限状态机模型的基础上，提出了交流调压电路的触发稳定性问题，并以此为工具重点分析和比较现有触发方案(电压同步双脉冲触发、电压同步宽脉冲触发和电流同步双脉冲触发等)的可靠性；确认了六路触发电压同步的宽脉冲方案最佳，电流同步双脉冲方案次之，而简单的电压同步双脉冲方案不可取，并通过仿真和实验验证了这些结论，对三相交流调压软启动电路的研究和设计有一定的指导意义。
The paper analyzes the present situation, the development of high frequency switching mode power supply and the soft switching technique, then to know the asymmetrical half-bridge suits to be used in the medium power situation. The paper firstly emphasizes on the AHB converter`s steady state operation principle and the relationship between the input and output voltage, then bring forward the voltage and current pressure of some important components and the condition to realize the MOSFET`s ZVS; and then considering the problem of transformer offset magnetizing current and the voltage oscillation in the circuit resulting from the inductor which in serial with the transformer, the paper analyses the reasons and the methods to resolve it. To the offset magnetizing current, it can be better through adjusting the circuit parameter or resolves in series with capacitor in double current rectify circle, but to the voltage oscillation it can be resolved by clamping the inductor to the source or ground. At last, the simulation proves the methods right.
本文首先分析了国内外高频开关电源及其软开关技术发展和现状，继而在此基础上着重分析适用于中等功率场合的不对称半桥电路的稳态工作原理及其稳态输入输出电压关系，给出关键器件的电压电流应力，并对其实现零电压开通的条件进行了讨论及改进，继而针对不对称半桥电路存在变压器直流偏置和串联电感带来的振荡问题进行了分析并提出了各自的解决办法即主功率变压器的直流偏置问题可以通过调整原电路的参数来改善或通过在次级采用倍流整流和串隔直电容来彻底解决此问题，而对于串联电感带来的电压振荡问题可以通过对串联电感进行双向钳位来解决，并通过仿真证明各种方法的可行性。
The paper analyses the limitation of the differentiation idelta I protection method, which puts forward traveling wave protection method for the DC power supply system that is based on interrelated characteristics of the traveling wave and the unit impedance of the transmission line. The traveling wave protection method overcomes the disadvantage of the traditional method in which the protection action is affected by the overall impedance of the circuit, and thus improves the reliability and sensibility of the relay protection system.
通过深入分析行波仅与传输线单位阻抗有关的传播特性，提取直流牵引供电系统的瞬变信息，建立了直流牵引供电系统的行波保护模型，克服了电流保护和di/dt-ΔI保护受线路总阻抗影响的弊端，从而提高了保护装置的可靠性和速动性。
Therefor, a new generation of BLDCM should be put forward in this paper, that is an electronic commutated motor with the ideal DC armature winding circuit.
提出了新一代BLDCM的设想，即具有理想直流电枢绕组电路的电子换向电动机，并对其旋转磁场-机械特性和转矩控制性方式进行了分析，有助于对其本质的理解。
At end, the thesis summarizes all the modulator circuit design, and has put forward the improvement scheme and emphasis and direction of the following work.
论文最后对整个设计进行了总结，提出了电路的改进方案以及今后工作的重点和方向。
An improved anti-saturation nonlinear circuit has been put forward and tested on the basis of the front-end electronics structure and further analysis of its saturation.
结合前端电子学系统的结构，对电路饱和的原因进行了深入分析，提出了非线性抗饱和电路改进方案，并进行了仿真和实验研究。
I thought at length about putting in a voltage doubler circuit to charge the smaller reversing battery from the main forward battery so that it doesn't have to be removed and charged but some research of available parts suggested that the cost of such an approach was quite high, however an unintended outcome of using the totem pole output design and the separate negative battery approach is that the current spike that is caused by the magnetic field collapse within the motor when the forward MosFET turns off at the oscilator rate at low speeds gets transferred to the negative battery by the protection schottky rectifier across the negative P Channel MosFET and this current pulse is quite significant.
我以为，在长度约将在一个电压倍增电路收取较小的扭转电池从主要着电池，所以它没有被遣送离境，并被控，但一些研究现有的部分建议的成本，这种做法是相当高，但是一个意外的结果，使用图腾柱输出的设计与单独的负面电池的做法是，目前穗这是所造成的磁场崩溃内部的电机时，提出的MOSFET关闭在oscilator率在低速得到转移以负面电池保护肖特基整流器全国的负面P通道MOSFET和电流脉冲，这是相当可观。
The iter also studied the method of diness and the calculation method of loop and short circuit in the dirtiness test, put forward the test method and accordingly put forward the final selective type project of fouling test transformer and booster. It solved the problem that the production corporations in china could not supply the correlative booster to satisfy requirement of the original test hail.
作者对污秽试验方法和污秽试验回路短路电流的计算进行了研究，提出了符合实际运行方式的测量阻抗电压的试验方法，并根据这种方法确定了污秽试验变压器和调压器的最终选型方案，解决了国内主要生产厂家不能按试验基地初设中的要求提供配套的调压器的难题。
Conventional current source is greatly impacted by the process parameter. A voltage difference square circuit is used to solve the problem, and a novel reference current source circuit with little influence by process parameter is put forward. Using Hspice based on 0.6μm BiCMOS process model, the simulation results show that in the typical corner, the current reference has a temperature coefficient of 17ppm/℃ and the variation can be kept within 0.2% in a temperature range from -40℃ to 85℃; the current reference variation is about ±1.72%, with corner tolerance analysis.
针对传统电流源受工艺参数影响较大的问题，提出了一种利用电压差平方电路来解决这个问题的思路；设计了一种新颖的受工艺参数影响较小的基准电流源电路，该电路采用0.6μm的BiCMOS工艺设计，利用Hspice进行仿真验证；结果表明，该电路在典型边界条件下-40℃~85℃范围内输出基准电流温度系数为17ppm/℃，变化率约0.2%，在6种不同边界条件下输出基准电流变化约为±1.72%。
Though the analysis of statical and dynamic characters on eddy-current sensor, it puts forward the influence factors of detective range and sensitivity and linear. On the other hand, it also makes dynamic character factor equel to two inertia system. It not only improves dynamic character but also has little influences to sensitivity by correcting with non-power circuit.
通过对涡流传感器的静态特性和动态特性的分析，指出影响传感器测量范围、灵敏度、线性度等指标的因素；推导出涡流传感器动态性能可以用两个串联的一阶惯性系统来表示，并设计出无源超前的校正电路，保证在不影响灵敏度的前提下可以大大的改善其系统的动态特性。
And then put forward the real-time detection of the single-phase circuit and reactive current.
使用MATLAB 仿真软件，对各种检测方法进行了仿真研究。
And some measures for improving the transducer, circuit and other parts of the gage are put forward.
文摘：阐述了目前超声测厚仪的一些不足，并在探头和电路等方面提出了一些改进措施。
This paper analyzes the shunt sensitivity in electrical sectionalizing joint of UM71 jointless track circuit, finding out the zone that doesn't fulfill the standard shunt sensitivity, calculating its length and putting forward some methods to reduce the dead zone.
通过对UM71无绝缘轨道电路电气绝缘节分路灵敏度的分析，找出不满足标准分路灵敏度的区段并计算其长度，从中寻找减小死区段的方法。
And put forward a method to limit short-circuit current—series reactance method.
提出了限制短路电流的方法—串联电抗法。
We have presented an improved design scheme for the control system of the robot ROMAT56, given the circuit diagrams of the hardware and realized the parallel calculating of the inverse space transform, the linearing and discoupling the dynamic model of the robot using artificial neural networks in the forward channel in the design of the software for tracking control.
对ROMAT56机器人控制系统提出了一种改进设计方案。给出了硬件电路设计图，并在跟踪控制算法软件设计中实现了人工神经网络反向空间变换算法和前馈线性化补偿解偶控制算法。