Font Size: a A A

Research On Multiple-Input Voltage-Fed Full-bridge Converter With Single Primary Winding

Posted on:2012-12-21Degree:MasterType:Thesis
Country:ChinaCandidate:C ZhouFull Text:PDF
GTID:2132330338996061Subject:Power electronics and electric drive
Abstract/Summary:PDF Full Text Request
Renewable energy has been receiving more and more attentions for solving the energy crisis and environmental pollution. Most renewable energies are mutually complementary in the sense that they can be utilized simultaneously to maintain continuous delivery of power to the load, which can be named as hybrid renewable power system. In such systems, the use of a multi-input dc/dc converter (MIC) leads to simpler circuit and lower cost compared to the conventional use of several single-input converters. This paper focuses on the topologies and experimental validation of MICs.At present, the system-generated methods of non-isolated and isolated MIC circuit topologies have been proposed in existing papers. Isolated full bridge MIC which achieves electrical isolation is multiple primary winding. Primary winding and the required power devices are increased with more input sources. It will lead to control difficulties and costs increase.This paper proposed a single primary winding voltage-fed full-bridge MIC by using the method of pulsed voltage source in series or parallel combination. This method replaces the single-input full bridge converter input sources. As compared with the multiple-primary winding full-bridge MIC, it has a simple structure and more flexible control, and only require a primary winding, and reduce the leakage inductance. The input source of full-bridge multi-input converter by paralleling buck pulse voltage source can transfer energy to the load-sharing. However, full-bridge MIC input source consisting of the pulse voltage source in parallel can transfer energy to the load-sharingA specific dual-input voltage-fed full-bridge converter with single primary winding is chosen as an example to illustrate the operating principle and characteristics of the isolated MICs, verify its accuracy and feasibility of theoretical analysis, also a detailed analysis has been done for the relationship between the inductor current ripple and the phase difference among the drive signals, and an interleaved dual-edge modulation (IDEM) is proposed in order to minimize the inductor current ripple. The IDEM can be applied to other double-input converters. A 800 W prototype is fabricated to verify the theoretical analysis and the effectiveness of the IDEM.
Keywords/Search Tags:single primary winding, dual-input full-bridge converter, interleaved dual-edge modulation
PDF Full Text Request
Related items