{"title":"一种新颖的自激PWM正激变换器，具有ZVS谐振跃迁，采用两个小回路操作的饱和磁芯","authors":"W. Gu, K. Harada","doi":"10.1109/PESC.1992.254695","DOIUrl":null,"url":null,"abstract":"A self-excited forward power converter is proposed. The turn-on and turn-off transitions of the switch are zero voltage switched resonant transitions. Two saturable cores operated in minor B-H loop are used to achieve such transitions. The waveform of the voltage across the switch is trapezoidal, and the current flowing in the switch is a quasi-square-wave. The switching losses are considerably reduced, and the stresses in the switch are significantly suppressed. The converter has load characteristics similar to those of a square-wave pulse-width-modulated (PWM) forward converter. The on duty ratio is modulated by a small current applied to the winding of one core. Experiments on a 350 kHz, 100 W DC-DC power converter show good performance.<<ETX>>","PeriodicalId":402706,"journal":{"name":"PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1992-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"A novel, self-excited, PWM forward converter with ZVS resonant transition using two minor-loop-operated saturable cores\",\"authors\":\"W. Gu, K. Harada\",\"doi\":\"10.1109/PESC.1992.254695\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A self-excited forward power converter is proposed. The turn-on and turn-off transitions of the switch are zero voltage switched resonant transitions. Two saturable cores operated in minor B-H loop are used to achieve such transitions. The waveform of the voltage across the switch is trapezoidal, and the current flowing in the switch is a quasi-square-wave. The switching losses are considerably reduced, and the stresses in the switch are significantly suppressed. The converter has load characteristics similar to those of a square-wave pulse-width-modulated (PWM) forward converter. The on duty ratio is modulated by a small current applied to the winding of one core. Experiments on a 350 kHz, 100 W DC-DC power converter show good performance.<<ETX>>\",\"PeriodicalId\":402706,\"journal\":{\"name\":\"PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference\",\"volume\":\"16 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1992-06-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/PESC.1992.254695\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PESC.1992.254695","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A novel, self-excited, PWM forward converter with ZVS resonant transition using two minor-loop-operated saturable cores
A self-excited forward power converter is proposed. The turn-on and turn-off transitions of the switch are zero voltage switched resonant transitions. Two saturable cores operated in minor B-H loop are used to achieve such transitions. The waveform of the voltage across the switch is trapezoidal, and the current flowing in the switch is a quasi-square-wave. The switching losses are considerably reduced, and the stresses in the switch are significantly suppressed. The converter has load characteristics similar to those of a square-wave pulse-width-modulated (PWM) forward converter. The on duty ratio is modulated by a small current applied to the winding of one core. Experiments on a 350 kHz, 100 W DC-DC power converter show good performance.<>
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