{"title":"scaldo辅助48v谷歌机架电源架构的DC-UPS能力","authors":"Thilanga Ariyarathna, N. Kularatna, D. Steyn-Ross","doi":"10.1109/APEC.2019.8722306","DOIUrl":null,"url":null,"abstract":"In order to reduce energy losses in high energy consuming data centers, Google introduced their 48-V rack power architecture in 2016 to replace the previous 12-V DC power distribution line. With the DC voltage increased by 4 times the ohmic losses can be reduced by 16 times. This new architecture is expected to be enhanced with rack-level DC-UPS.Compared to traditional very high-frequency switch mode DC-DC converters with their complexity and interference issues, a typical linear converter generates low-noise high-quality DC, albeit with the very low efficiency. The supercapacitor (SC) assisted low drop-out (SCALDO) regulator is a unique new DC-DC converter that resolves this low-efficiency issue. This paper provides a new design approach to achieve a low-frequency supercapacitor-based energy recovery technique for a 48-V DC power supply with efficiencies comparable to switch mode power supplies but with the added advantage of two-stage DC-UPS capability at no additional cost.","PeriodicalId":142409,"journal":{"name":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"DC-UPS Capability for the SCALDO-Assisted 48-V Google Rack Power Architecture\",\"authors\":\"Thilanga Ariyarathna, N. Kularatna, D. Steyn-Ross\",\"doi\":\"10.1109/APEC.2019.8722306\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In order to reduce energy losses in high energy consuming data centers, Google introduced their 48-V rack power architecture in 2016 to replace the previous 12-V DC power distribution line. With the DC voltage increased by 4 times the ohmic losses can be reduced by 16 times. This new architecture is expected to be enhanced with rack-level DC-UPS.Compared to traditional very high-frequency switch mode DC-DC converters with their complexity and interference issues, a typical linear converter generates low-noise high-quality DC, albeit with the very low efficiency. The supercapacitor (SC) assisted low drop-out (SCALDO) regulator is a unique new DC-DC converter that resolves this low-efficiency issue. This paper provides a new design approach to achieve a low-frequency supercapacitor-based energy recovery technique for a 48-V DC power supply with efficiencies comparable to switch mode power supplies but with the added advantage of two-stage DC-UPS capability at no additional cost.\",\"PeriodicalId\":142409,\"journal\":{\"name\":\"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)\",\"volume\":\"77 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-03-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/APEC.2019.8722306\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 IEEE Applied Power Electronics Conference and Exposition (APEC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APEC.2019.8722306","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
DC-UPS Capability for the SCALDO-Assisted 48-V Google Rack Power Architecture
In order to reduce energy losses in high energy consuming data centers, Google introduced their 48-V rack power architecture in 2016 to replace the previous 12-V DC power distribution line. With the DC voltage increased by 4 times the ohmic losses can be reduced by 16 times. This new architecture is expected to be enhanced with rack-level DC-UPS.Compared to traditional very high-frequency switch mode DC-DC converters with their complexity and interference issues, a typical linear converter generates low-noise high-quality DC, albeit with the very low efficiency. The supercapacitor (SC) assisted low drop-out (SCALDO) regulator is a unique new DC-DC converter that resolves this low-efficiency issue. This paper provides a new design approach to achieve a low-frequency supercapacitor-based energy recovery technique for a 48-V DC power supply with efficiencies comparable to switch mode power supplies but with the added advantage of two-stage DC-UPS capability at no additional cost.
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