{"title":"用于主动磁轴承的改进型G类放大器","authors":"F. Maddaleno, Stefano Carabelli, M. Muzzarelli","doi":"10.1109/APEC.1997.581510","DOIUrl":null,"url":null,"abstract":"To improve the overall efficiency of a transconductance amplifier loaded by the high inductance and low resistance typical of the magnetic bearing coils, a modified class G amplifier has been developed. A third transistor has been connected from ground to output, in order to obtain high efficiency coil discharge. A simple theoretical characterization has been used to provide some diagrams to optimize the power efficiency as a function of a nonconstant load such as that due to a rotor unbalance. Experimentalal results are reported showing a good agreement with the developed theory.","PeriodicalId":423659,"journal":{"name":"Proceedings of APEC 97 - Applied Power Electronics Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"A modified class G amplifier for active magnetic bearings\",\"authors\":\"F. Maddaleno, Stefano Carabelli, M. Muzzarelli\",\"doi\":\"10.1109/APEC.1997.581510\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"To improve the overall efficiency of a transconductance amplifier loaded by the high inductance and low resistance typical of the magnetic bearing coils, a modified class G amplifier has been developed. A third transistor has been connected from ground to output, in order to obtain high efficiency coil discharge. A simple theoretical characterization has been used to provide some diagrams to optimize the power efficiency as a function of a nonconstant load such as that due to a rotor unbalance. Experimentalal results are reported showing a good agreement with the developed theory.\",\"PeriodicalId\":423659,\"journal\":{\"name\":\"Proceedings of APEC 97 - Applied Power Electronics Conference\",\"volume\":\"8 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1997-02-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of APEC 97 - Applied Power Electronics Conference\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/APEC.1997.581510\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of APEC 97 - Applied Power Electronics Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APEC.1997.581510","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A modified class G amplifier for active magnetic bearings
To improve the overall efficiency of a transconductance amplifier loaded by the high inductance and low resistance typical of the magnetic bearing coils, a modified class G amplifier has been developed. A third transistor has been connected from ground to output, in order to obtain high efficiency coil discharge. A simple theoretical characterization has been used to provide some diagrams to optimize the power efficiency as a function of a nonconstant load such as that due to a rotor unbalance. Experimentalal results are reported showing a good agreement with the developed theory.
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