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Vacuum circuit breaker is widely used as a new type of the high voltage circuit breaker at present.

真空断路器作为一种新型的高压断路器正越来越广泛的被采用。

In the second chapter, this paper analysis the technology and process of the low-voltage circuit breaker FEM simulation.

第一章主要介绍了当今有限元仿真分析技术的情况，回顾了产品仿真技术的产生和发展，着重介绍了国内外低压断路器仿真技术、有限元技术的研究现状和应用情况。

We used the numerical simulation, considered the variation of potential, electric field and carrier concentration in SITH, researched and expatiated the rule of increasing current in block-state, the mechanism of breakover phenomenon and the on-state voltage drop.

研究中采用了数值模拟的方法，从器件内部的电势、电场以及载流子浓度的变化角度，阐述了阻断态电流增长的规律、转折发生的原因、以及导通态压降和电流的变化特点。

When a lightning current or over-voltage reaches the threshold value of the zinc oxide resistor, the resistance of the zinc oxide quickly breakover and bleed the lightning current to the earth, thus protecting the circuit.

当有雷电流或者过电压达到氧化锌电阻的阀值时，氧化锌电阻迅速导通，将雷电流泄放到大地，从而对电路起到保护作用。

The study results shows that the breakover phenomenon in the Ⅰ-Ⅴ characteristics of SITH is due to the continual decreasing of potential and the continual increasing of anode P-N junction bias, accordingly the high injection formed in the drifting region, which leads to the hole concentration of space charge region near the gate much higher than the ionized acceptor concentration, and the space charge region reduced and can not stand higher voltage.

论文总结得到的SITH模型一即"SIT控制的二极管"模型—对分析该器件的工作机制显示了良好的作用。

On the basis of function experience at scene of the city power wire-in protector in the brewhouse,this paper analysed the reason why the voltage collapse relay resistting act,found out the reason and put forward the settle project through examinations.

在啤酒厂市电进线保护装置现场运行经验的基础上，分析失压继电器拒动的情况，通过试验，找出故障的原因，并提出解决方案

Meanwhile, reference temperature signal of semiconductor refrigerator is transformed to standard voltage signal by electric bridge circuit.

致冷块的参考温度信号经过Pt100的电桥电路转换为标准电压信号。

The operation principle of single-phase bridge voltage model inverter circuit and PWM control circuit are analysed.

实践表明：运用PWM控制技术能够很好地实现逆变电路的运行要求。

In this paper, on the basis of circuit analysis, the relationships between the output voltage and flow angle and load characteristics in the three-phase bridge fully controlled rectifier circuit were studied using simulation software Simulink based on MATLAB.

本文在对三相桥式全控整流电路的输出电压与导通角及负载特性的关系进行分析的基础上，采用Matlab的可视化的仿真工具Simulink对其进行了仿真研究。

A popular solution is the self-oscillating Half Bridge Voltage fed fluorescent lamp balast.

该公司致力于能够降低移动应用功耗的开发处理器架构和可配置硬件"结构"。www.xmos.com

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。