UPS系统技术和Delta变换UPS系统

阐述国内外UPS系统技术现状和发展趋势,讨论传统的双变换在线UPS系统存在的问题及解决办法,介绍单变换UPS系统,最后着重介绍Delta变换UPS系统。     

浅析UPS的配置

本文以介绍UPS的作用、基本原理、构成为出发点,分别阐述了后备式、在线式、在线互动式UPS的特点和适用场合,重点深入浅出的阐述了UPS种类配置、容量配置、方式配置方法。     

UPS“守护神“蓄电池在线监测系统

UPS在通讯及其它领域获得了广泛应用,但人们却忽视了UPS自身的有效性检测.本文分析了UPS蓄电池在线监测的原理,指出了蓄电池在线监测系统的解决方案.     

在线式UPS原理与使用

UPS按照工作方式可分为:在线式(ONLINE)、在线互动式(LINE INTERACTIVE)、后备式(OFF LINE)3种.由于在线式UPS有着其他UPS电源和稳压电源无法比拟的优点,使得在线式UPS在各行业得到了广泛的应用.     

UPS设备浅析

从UPS的使用及维护的角度介绍UPS供电系统的分类，选型及维护，较全面地分析了UPS的特性及性能。     

UPS设备浅析

从UPS的使用及维护的角度介绍UPS供电系统的分类 ,选型及维护 ,较全面地分析了UPS的特性及性能     

UPS的使用维护与选择

1UPS的类别与特点 目前常见的UPS产品主要是后备式（Off Line）、在线式（On Line）与在线互动式（Line Interactive）。     

UPS系统结构和性能分类

本文根据新的国际标准IEC 62040-3的规定,介绍了双变换UPS、市电交互UPS、冷备用UPS等三种标准单机UPS系统和各种冗余UPS系统,闸述了UPS按性能分类的新方法.     

UPS与EPS的性能比较

（1）UPS（不间断电源）是Uninterruptible Power Supply的缩写,就是人们常说的不间断电源。市场上常见的UPS主要有在线式、在线互动式和后备式三种。     

量身定做的UPS

近期,关键电源和制冷服务商APC公司,专为中国用户推出了Smart-UPSsRC系列新品SRC1-10kVA（在线双变换UPS）。     

选择和使用维护UPS电源

对在线式正弦波输出UPS、后备式正弦波输出UPS、后备式方波输出UPS电源的主要特点进行了介绍,指出在选购UPS电源时应着重考虑的几个因素,并对UPS电源的日常维护提出了几点建议。     

关于UPS‘Delta变换技术''的讨论

“Delta变换技术”是近年来在UPS中使用的新技术，而应用“Delta变换技术”的UPS产品也已经推向市场。本文从“Delta变换技术”的技术属性、应用该技术的UPS主电路结构及其PFC功能、在线式工作功能等方面对它作了较详尽的介绍。     

对UPS两项指标的探讨

本文阐述了UPS招标文件中输入电流谐波成份和输入功率因数两项指标的重要性,指出常用的双变换在线式UPS提高输入功率因数及降低输入电流谐波成份的解决方法.     

UPS电源中SPWM控制技术的研究

论述了目前UPS电源中所用到的一些SPWM控制方法，重点介绍了一种基于PIC16F73单片机产生SPWM控制波形的方法，以及这种方法应用于在线式纯正弦波UPS电源系统中的可行性。     

基于DSP控制的在线式UPS装置研究

介绍了一种基于Ti（Texas Instruments）公司的TMS320F240数字信号处理器的在线式UPS，分析了系统设计中的一些关键技术问题。设计了一台容量为6kW的在线式UPS试验装置，并进行了验证，实践证明所研制的装置完全达到技术要求。     

A Novel AC UPS With High Power Factor and Fast Dynamic Response

This paper presents a novel ac uninterruptible-power-system (UPS) scheme with high power factor, which offers excellent characteristics such as sinusoidal input current, sinusoidal output voltage, fast regulation of the ac mains, galvanic isolation, and fast transient response. The proposed converter includes the offline–online concept, which avoids the continuous charging and discharging of the battery as it occurs in a typical online UPS. Analysis and design considerations, as well as simulation and experimental results, are given in this paper.      

UPS电源逆变环节嵌入式重复控制系统的改进

在基于嵌入式重复控制和传统P控制的复合控制方案的基础上,加入积分控制,应用于110V50Hz UPS的逆变环节,加速了调节过程,改善了系统静态特性。文章详细分析了系统的结构、重要控制参数的整定,并在SABER软件环境下建立50Hz UPS电源的逆变闭环控制系统仿真模型。仿真实验结果表明:采用此控制方案在额定负载范围内输出特性良好,能获得稳定的50Hz正弦电压,是一种高性能、低成本的控制系统。     

A new UPS topology employing a PFC boost rectifier cascadedhigh-frequency tri-port converter

A new uninterruptible power supply (UPS) topology using the high-frequency tri-port UPS technique is proposed which presents the advantages of no-break power, low cost, input unity power factor, high power density, and high power conversion efficiency. Through the proposed circuit configuration, charging concept, and control strategy, the battery management is easily obtained by controlling the output voltage of the power-factor-correction (PFC) converter, which results in no additional power device being required for charging. The implementing circuit of the charging method is submitted to perform the two-stage charging, constant current charging, and constant voltage charging. The proposed technologies can be applied to the switching power supply with built-in UPS function featuring a low-cost solution for computer equipment, Finally, an experimental AC online UPS is built to verify the proposed concept, analysis, and control strategy     

High-Performance Transformerless Online UPS

In this paper, a high-performance single-phase transformerless online uninterruptible power supply (UPS) is proposed. The proposed UPS is composed of a four-leg-type converter, which operates as a rectifier, a battery charger/discharger, and an inverter. The rectifier has the capability of power-factor collection and regulates a constant dc-link voltage. The battery charger/discharger eliminates the need for the transformer and the increase of the number of battery and supplies the power demanded by the load to the dc-link capacitor in the event of the input-power failure or abrupt decrease of the input voltage. The inverter provides a regulated sinusoidal output voltage to the load and limits the output current under an impulsive load. The control of the dc-link voltage enhances the transient response of the output voltage and the utilization of the input power. By utilizing the battery charger/discharger, the overall efficiency of the system is improved, and the size, weight, and cost of the system are significantly reduced. Experimental results obtained with a 3-kVA prototype show a normal efficiency of over 95.6% and an input power factor of over 99.7%.