{"title":"A closed-loop control of high power LLC Resonant Converter for DC-DC applications","authors":"Alpa Gopiyani, V. Patel","doi":"10.1109/NUICONE.2011.6153284","DOIUrl":null,"url":null,"abstract":"This paper presents a new closed-loop control strategy applied to half-bridge high power LLC Resonant Converter applicable in DC-DC applications and can be applied for other applications also. A new control circuit is designed and implemented for the high power LLC converter. A closed-loop variable frequency control through VCO is analyzed through PI Controller. Due to Zero Voltage Switching (ZVS) technique the turn-on losses of both the switches (IGBTs) in half-bridge are reduced and ZVS can be achieved for the entire control range in close-loop. Validity of PI controller and control circuit in closed-loop are verified with software simulation results for wide input and load range. A hardware prototype rated at 2.1 kW has been built with DSP TMS320F2811 and hardware results are presented to verify the control strategy. Practical results with DC-DC converter match with the simulated results and performance of control circuit is verified and tested practically with input voltage variations and load changes at different references.","PeriodicalId":206392,"journal":{"name":"2011 Nirma University International Conference on Engineering","volume":"29 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2011 Nirma University International Conference on Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NUICONE.2011.6153284","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
This paper presents a new closed-loop control strategy applied to half-bridge high power LLC Resonant Converter applicable in DC-DC applications and can be applied for other applications also. A new control circuit is designed and implemented for the high power LLC converter. A closed-loop variable frequency control through VCO is analyzed through PI Controller. Due to Zero Voltage Switching (ZVS) technique the turn-on losses of both the switches (IGBTs) in half-bridge are reduced and ZVS can be achieved for the entire control range in close-loop. Validity of PI controller and control circuit in closed-loop are verified with software simulation results for wide input and load range. A hardware prototype rated at 2.1 kW has been built with DSP TMS320F2811 and hardware results are presented to verify the control strategy. Practical results with DC-DC converter match with the simulated results and performance of control circuit is verified and tested practically with input voltage variations and load changes at different references.
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