Power device module which provides power of all modules and drives control equipments to accomplish intention of main control module and can provide zero crossing protection circuit excess voltage and under voltage protection circuit and excess current protection circuit ;

电源驱动模块：主要提供各个模块的电源，驱动被控设备，实现主控模块的意图，并能实现继电器的过零保护，过流、过压、 欠 压保护；

Reactive power optimization under voltage constraints margin

考虑 电压约束裕度的无功优化及其 内点解法

Parameter setting for under frequency load shedding ( UFLS ) and under voltage load shedding ( UVLS ) should not only ensure static security of frequency and voltage but also suffice their transient security .

指出了低频和 低压减载装置的整定不仅要满足静态和中长期动态对频率和电压的安全性要求，而且要满足暂态过程中的频率和 电压安全约束。

With the perfect protection in over voltage under voltage over heat over current over load safe and reliable .

具有完善的过压， 欠 压，过热，过流，过载自动保护功能，安全可靠。

Design of Under Voltage Lock Out Circuit Based on 0.5 μ m BCD Process

基于0.5μmBCD工艺的 欠 压锁存电路设计

By the design of a launcher product the design principles and methods of military equipment on voltage ripple resistance over voltage surge under voltage surge and power transient break are given .

结合某型发射装置产品，详细论述了军用装备在耐电压尖峰、耐过电压浪涌、耐 欠 电压浪涌以及耐瞬时断电等方面的设计原则和方法。

Analysis of over voltage and under voltage protection circuit of new generator set

新型发电机组过 欠 压保护电路分析

Automatic Protection : overload short circuit high temperature low oil pressure under voltage oil temperature overspeed protection auto trip stop function ;

自动保护功能：具有过载、短路、高水温、低油压、 欠 电压、油高温、超速保护、自动跳闸、停机功能；

Analysis of the cause over-voltage under voltage over current and over-temperature anomalies of the reasons the protection circuit is designed accordingly .

分析了引起过压、 欠 压、过电流及过热等异常现象的原因，设计了相应的保护电路。

Based on the under voltage load shedding schemes in other provincial power grids across the country the under voltage load shedding scheme for Tianjin Power Grid is formulated .

文章对东京电力公司和加拿大魁北克水电系统两种 低压减载方案进行了分析，研究了在国际上两种比较典型的分布式和集中式低压减载装置的原理和实际工作情况。

Simultaneous multi-position welding without under voltage ;

可进行多工位同时焊接，无 抢 电现象；

Characteristics of large scale wind turbine system under voltage disturbance from power grid

大型风力发电机 在电网 电压扰动 下的特性

We propose a novel thermal-conscious power model for integrated circuits that can accurately predict power and temperature under voltage scaling .

提出了一种新型热感功耗模型，该模型能够准确估计出 电压调整情况 下的功耗和温度。

Research on effects of relaying protection and under frequency and under voltage load shedding in probabilistic stability

概率稳定中继电保护和低频 低压减载影响的研究

The utility model has the advantages of the stable performances the high reliability on under voltage release and the reasonable structure .

本实用新型性能稳定， 欠 压脱扣可靠性高，结构合理。

According to test results the reliability analysis on the data of accumulative test time accumulative failure number of times and average non failure time in the operative mechanism under voltage release and electromagnet to switch on were carried out .

根据试验结果，对操作机构、 欠 压脱扣器和合闸电磁铁中的累积试验时间、累积故障数及平均无故障时间等数据进行了可靠性分析。

Under voltage tripping test .

高压脱扣测验。

When it is used in the 220 V circuit with an industrial frequency alternating current it can give good protection against overvoltage under voltage interference of strong current thunder and lightning electric shock electric leakage electric wire fire and circuit fire .

应用于220V工频交流电路中，对过电压、 欠 电压、强电和雷电干扰、触电、漏电和电线短路失火等事故均有良好的防护作用。

The under voltage lockout is especially suitable for the application in the power management ICs such as charger DC-DC converter etc.

本文设计的 欠 压闭锁电路可用于充电器和DC-DC转换器等电源管理芯片。

An intelligent controller of power-factor automatic compensation used in low voltage power system is introduced and an under voltage protective scheme based on there phase voltage is presented .

介绍了一种用于低压配电系统的智能型功率因数自动补偿控制器，并提出了以三相电压为判据的 欠 压保护方案。

This product comprehensive protection adopts digital single chip technology possess the functions such as overload short circuit under voltage voltage loss protection ;

该产品综合保护采用数字化单片技术，具有过载、短路、 欠 压、失压保护；

To avoid the safety issue during the design progress several protection circuits are added like the input under voltage 、 over voltage protection polarity protection output over power protection 、 short circuit protection 、 over temperature protection .

出于对产品安全性的考虑在设计的过程中增加了输入 欠 压、过压保护，输入反接保护，输出过功率，输出短路保护，过温保护。

Under voltage control method we designed a piezoelectric actuator power which based on the series voltage negative feedback principle the DC power supply circuit and the piezoelectric ceramic discharge circuit .

根据 电压控制法，设计了基于串联电压负反馈原理的压电陶瓷驱动电源，以及直流供电电路和压电陶瓷的放电回路，通过仿真验证了 电源的高 线性度和 低 纹波。

The device can solve the problem of over current in electromotor start up process and has the digital displaying of fault such as under voltage over voltage and over current etc.

该系统解决了电动机启动中电流过大的问题，并且实现电动机的过压、过流、 欠 压等各种故障的数字显示。

Based on fuzzy-logic turn-off angle optimization the simulation of SRD is established under voltage chopper control . The real-time optimization to turn-off angle of SRM is carried out by using fuzzy logic controller to reduce torque ripple .

SRM 采用 电压斩波控制方式，建立基于模糊逻辑优化关断角的SRD仿真，利用模糊逻辑控制器对SRM的关断角进行实时优化，从而达到抑制转矩脉动的目的。

Such as : band gap reference voltage the bias circuit error amplifier oscillator PWM comparator over thermal protection under voltage protection logic control part .

其中包括：带隙基准源、偏置电路、误差放大器、振荡器、PWM比较器、过温和 欠 压保护电路、逻辑控制等部分。

The static and dynamic mathematical model of inductor-type synchronous motor is established . The frequency response of input-output characteristics under voltage control and current control are studied .

建立了感应子式同步电机的静、动态数学模型；研究了感应子式同步电机输入输出特性以及 电压控制和电流控制 下的频率特性。

In addition several common protection circuits are introduced in this paper which include thermal shutdown overvoltage protection under voltage lockout overcurrent protection and ESD protection .

另外，本文介绍了几种常见的保护电路，包括过温保护、过压保护、 低压锁存保护、过流保护和ESD保护，通过加入保护电路进一步提高了芯片的可靠性。