恒压

In the end, the main content of this dissertation is addressed.In chapter 2, based on the analysis of present vibrators principle and structure, two kinds of transfer functions and frequency response curves of the vibrator, driven by voltage feedback power amplifier and current feedback amplifier, are given separately. And turnover frequencies between different frequency rangs are also given.

第二章分析了标准振动台的工作原理和结构，在此基础上，建立了标准振动台的机械和电气方程，给出了恒压源和恒流源功放激励下的振动台传递函数及幅频、相频特性曲线，列出了不同频段间的转折频率。

The pulse power supply consists of three-phase half-wave thyristor rectifier and IGBT chopping circuit.

该电源采用三相半波晶闸管整流电路，IGBT进行直流斩波；根据电流电压反馈信号计算偏差，进行数字PI调节获得恒流、恒压输出特性；控制系统通过20mA电流环异步串行通讯接口与人机界面交换数据。

Common induction motor variable frequency system is extensively applied, but common induction motors are designed by constant frequency and constant voltage, when the frequency change that induction motor works, the parameter and performance of common induction motor will change.

摘要普通交流异步电动机变频调速系统被广泛应用，但是，普通交流异步电动机都是按恒频、恒压设计的，在频率改变时，电动机的参数和性能都将发生改变。

The power supply with parallel series circuit is favourable to solve the problem of anode passivation.

与普通的可调恒流或恒压的电解电源相比，能取得更好的经济效益

This power system actually contain 2 sets of design, constant voltage power system and constant current power system respectively.

本电源系统包括两种设计，分别为恒压电源系统和恒流电流系统。

The results showed that: the charging method had significant influence on deep cycling VRLA batteries;the constant-voltage charging method tended to long-term undercharge the batteries;the failure cause of constant-current charging batteries was that the active material would be soften and shed; the VRLA battery's serveice life would be improved by using pulse-charging method.

结果表明：1、充电制度对深循环VRLA电池的寿命有着重要的影响；2、恒压充电方法容易导致电池长期充电不足，从而发生硫酸盐化；3、恒流充电的电池失效原因是正极板铅膏发生软化、脱落；4、脉冲充电的方法可使深循环VRLA电池寿命提高。

Constant voltage and current, antioxidize case:Insure flux quality accordantly in condition of instable power and air pressure;Soldering paste density without change after long time work.

恒压恒流，防氧化箱：在电源气压不稳定的情况下确保喷雾量一致；助焊剂在长时间的使用保持浓度无变化。

The digital high power system based on constant RMS, can adapt to various constant voltage or current application. One application is installed in the air exhauster to control the process of producing the tube of energy-saving lamp.

中文摘要：基于有效值恒定的大功率数字电源系统，具有非常广泛的应用范围，可以适用于各种需要有效值恒定的恒压和恒流电源的场合，如应用在生产节能灯管的排气机——长排车上，用于控制节能灯管的排气过程。

Comparing comprehensive ly the present various current converting circuits, it is proposed an design structure of direct-driven wind power generation current converting systems in megawatt level.

摘 要：在综合比较当前适合直驱型风力发电机组的各种变流电路的基础上[1~ 2]，提出了一种兆瓦级直驱型风力发电变流系统的设计结构，即采用不控整流+升压斩波+SPWM逆变的变流器将电机发出的电能转换为可接入电网的恒频恒压的交流电。

Two PI adjustors were applied for wire feeding velocity control, one performed motor armature voltage feedback, the other one executed arc voltage feedback to determine the given velocity.3、 Exchanging data of power source and process controller by adapting 20mA current loop by a serial communication interface, which satisfy real time control demand.

该控制器具有焊接参数预置、记忆、锁定、数显以及自动引弧、收弧等功能。 2、焊接电源采用三相半控桥晶闸管整流电路，用不同方法计算偏差进行多变量数字解耦PI调节获得恒流、恒压、陡降和缓降四种输出静特性。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。