{"title":"Output impedance of PWM UPS inverter-feedback vs. filters","authors":"A. Kusko, D. Galler, N. Medora","doi":"10.1109/IAS.1990.152313","DOIUrl":null,"url":null,"abstract":"The output impedance of an uninterruptible power supply (UPS), which determines the voltage distortion caused by switchmode power supplies, rectifiers, and other nonlinear loads, is reviewed. Step-wave inverters that use shunt filter traps to attenuate the voltage harmonics and thereby present a low impedance to the harmonic load currents of the same order are discussed. Another approach to reducing the output impedance of pulse-width modulation (PWM) inverters, using the negative-feedback technique of the amplifier, is also discussed. Conclusions concerning the use of filters and feedback in the design of PWMs for UPSs are summarized.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"130 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"31","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IAS.1990.152313","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 31
Abstract
The output impedance of an uninterruptible power supply (UPS), which determines the voltage distortion caused by switchmode power supplies, rectifiers, and other nonlinear loads, is reviewed. Step-wave inverters that use shunt filter traps to attenuate the voltage harmonics and thereby present a low impedance to the harmonic load currents of the same order are discussed. Another approach to reducing the output impedance of pulse-width modulation (PWM) inverters, using the negative-feedback technique of the amplifier, is also discussed. Conclusions concerning the use of filters and feedback in the design of PWMs for UPSs are summarized.<>
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