{"title":"宽输入电压和负载范围准z源隔离降压-升压变换器的功率损耗模型和效率分析","authors":"H. Maheri, D. Vinnikov, A. Chub, V. Sidorov","doi":"10.1109/RTUCON51174.2020.9316587","DOIUrl":null,"url":null,"abstract":"The galvanically isolated full-bridge series resonant quasi-Z-source dc-dc converter is studied. It features two main operating modes, buck and boost, which correspond to the converter operation above and below the nominal voltage, respectively. Power loss models are developed for both operating modes to identify the mechanism of losses. They consider switching and conduction losses in the input-side switches, core and windings losses in the transformer and the quasi-Z-source inductor, and conduction losses in the voltage doubler rectifier diodes. The developed loss models are verified at three input voltages using a 300 W experimental prototype. The inaccuracy of the developed models does not exceed 2 W, which is acceptable in comparison with the maximum estimated power loss of over 12 W. The experimental and the estimated efficiency follow the same trend. Also, the estimated efficiency exceeds the measured by no more than 1% at full power.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Power Loss Model and Efficiency Analysis of the Quasi-Z-Source Isolated Buck-Boost Converter with Wide Input Voltage and Load Range\",\"authors\":\"H. Maheri, D. Vinnikov, A. Chub, V. Sidorov\",\"doi\":\"10.1109/RTUCON51174.2020.9316587\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The galvanically isolated full-bridge series resonant quasi-Z-source dc-dc converter is studied. It features two main operating modes, buck and boost, which correspond to the converter operation above and below the nominal voltage, respectively. Power loss models are developed for both operating modes to identify the mechanism of losses. They consider switching and conduction losses in the input-side switches, core and windings losses in the transformer and the quasi-Z-source inductor, and conduction losses in the voltage doubler rectifier diodes. The developed loss models are verified at three input voltages using a 300 W experimental prototype. The inaccuracy of the developed models does not exceed 2 W, which is acceptable in comparison with the maximum estimated power loss of over 12 W. The experimental and the estimated efficiency follow the same trend. Also, the estimated efficiency exceeds the measured by no more than 1% at full power.\",\"PeriodicalId\":332414,\"journal\":{\"name\":\"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-11-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/RTUCON51174.2020.9316587\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RTUCON51174.2020.9316587","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Power Loss Model and Efficiency Analysis of the Quasi-Z-Source Isolated Buck-Boost Converter with Wide Input Voltage and Load Range
The galvanically isolated full-bridge series resonant quasi-Z-source dc-dc converter is studied. It features two main operating modes, buck and boost, which correspond to the converter operation above and below the nominal voltage, respectively. Power loss models are developed for both operating modes to identify the mechanism of losses. They consider switching and conduction losses in the input-side switches, core and windings losses in the transformer and the quasi-Z-source inductor, and conduction losses in the voltage doubler rectifier diodes. The developed loss models are verified at three input voltages using a 300 W experimental prototype. The inaccuracy of the developed models does not exceed 2 W, which is acceptable in comparison with the maximum estimated power loss of over 12 W. The experimental and the estimated efficiency follow the same trend. Also, the estimated efficiency exceeds the measured by no more than 1% at full power.