Dynamic response analysis and output voltage control of asymmetric half bridge DC–DC converter for low voltage applications |
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| Affiliation: | 1. Anna University, Chennai, Tamilnadu, India;2. Anna University of Technology, Tirunelveli, Tamilnadu, India;1. Center for Electric Power and Energy, Technical University of Denmark, Frederiksborgvej 399, Building 776, 4000 Roskilde, Denmark;2. Danish Energy Association, Vodroffsvej 59, 1900 Frederiksberg C, Denmark;3. Netherlands Organization for Applied Research, TNO, Anna van Buerenplein 1, 2595DA The Hague, The Netherlands;1. Department of Radiology, The First Affiliated Hospital of Soochow University, Suzhou, China;2. Department of Radiology, Feinberg School of Medicine, Northwestern University, 737 N. Michigan Ave., 16th Floor, Chicago, IL 60611;3. Department of Orthopedics, The Affiliated Hospital of Qingdao University, Qingdao, China;4. Department of General Surgery, Nanfang Hospital, Southern Medical University, Guangdong Provincial Engineering Technology Research Center of Minimally Invasive Surgery, Guangzhou, China;5. Department of Radiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China;6. Department of Radiology, The Third Affiliated Hospital of Soochow University, Changzhou, China;7. Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois;1. Bolyai Institute, University of Szeged, 1 Aradi v. tere, Szeged, Hungary;2. MTA-SZTE Analysis and Stochastics Research Group, Bolyai Institute, University of Szeged, 1 Aradi v. tere, Szeged, Hungary |
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| Abstract: | Asymmetric control scheme is an approach to achieve Zero Voltage Switching (ZVS) for half bridge isolated DC–DC converters. Due to the switching property included in their structure, DC–DC converters have a nonlinear behavior and their controller design is accompanied with complexities. But by employing the average method it is possible to approximate the system into a linear system and then linear control methods can be used. Dynamic performance of half bridge converters output voltage can be controlled by Pole placement and PID controllers. In this paper, Genetic Algorithm is used to optimize the system to achieve the optimum dynamic response. Matrix coefficients and dominant poles of closed loop transfer function is selected based on Genetic Algorithm. The results show an improvement in voltage control response in a short time. |
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