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Open AccessArticle

Analysis of a Multilevel Dual Active Bridge (ML-DAB) DC-DC Converter Using Symmetric Modulation

The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
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Academic Editor: Bimal K. Bose
Electronics 2015, 4(2), 239-260; https://doi.org/10.3390/electronics4020239
Received: 30 January 2015 / Accepted: 2 April 2015 / Published: 20 April 2015
(This article belongs to the Special Issue Multi-Level Converters)
Dual active bridge (DAB) converters have been popular in high voltage, low and medium power DC-DC applications, as well as an intermediate high frequency link in solid state transformers. In this paper, a multilevel DAB (ML-DAB) has been proposed in which two active bridges produce two-level (2L)-5L, 5L-2L and 3L-5L voltage waveforms across the high frequency transformer. The proposed ML-DAB has the advantage of being used in high step-up/down converters, which deal with higher voltages, as compared to conventional two-level DABs. A three-level neutral point diode clamped (NPC) topology has been used in the high voltage bridge, which enables the semiconductor switches to be operated within a higher voltage range without the need for cascaded bridges or multiple two-level DAB converters. A symmetric modulation scheme, based on the least number of angular parameters rather than the duty-ratio, has been proposed for a different combination of bridge voltages. This ML-DAB is also suitable for maximum power point tracking (MPPT) control in photovoltaic applications. Steady-state analysis of the converter with symmetric phase-shift modulation is presented and verified using simulation and hardware experiments. View Full-Text
Keywords: dual active bridge; DC-DC multilevel converter; neutral point clamped (NPC); symmetric modulation; soft-switching dual active bridge; DC-DC multilevel converter; neutral point clamped (NPC); symmetric modulation; soft-switching
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MDPI and ACS Style

Moonem, M.A.; Pechacek, C.L.; Hernandez, R.; Krishnaswami, H. Analysis of a Multilevel Dual Active Bridge (ML-DAB) DC-DC Converter Using Symmetric Modulation. Electronics 2015, 4, 239-260. https://doi.org/10.3390/electronics4020239

AMA Style

Moonem MA, Pechacek CL, Hernandez R, Krishnaswami H. Analysis of a Multilevel Dual Active Bridge (ML-DAB) DC-DC Converter Using Symmetric Modulation. Electronics. 2015; 4(2):239-260. https://doi.org/10.3390/electronics4020239

Chicago/Turabian Style

Moonem, M. A.; Pechacek, C. L.; Hernandez, R.; Krishnaswami, H. 2015. "Analysis of a Multilevel Dual Active Bridge (ML-DAB) DC-DC Converter Using Symmetric Modulation" Electronics 4, no. 2: 239-260. https://doi.org/10.3390/electronics4020239

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