Triangular and Trapezoidal Modulation for Dual Active Bridge DC-DC Converters with Fast Switching Semiconductors

This paper presents improved equations to operate a dual active bridge converter with the combined triangular and trapezoidal modulation. They increase the accuracy of the predicted switching times by incorporating parasitic effects such as equivalent resistance, dead time, and limited dv/dt for the...

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Bibliographic Details
Published in2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe) pp. 1 - P.10
Main Authors Goldmann, Daniel, Schramm, Simon, Herzog, Hans-Georg
Format Conference Proceeding
LanguageEnglish
Published EPE Association 01.09.2019
Subjects
Bridge circuits
Converter control
DC-DC power converters
Efficiency
Europe
Mathematical model
Modulation
Sensorless control
Silicon Carbide (SiC)
Soft switching
Switches
Switching circuits
ZCS converters
ZVS converters
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Summary:This paper presents improved equations to operate a dual active bridge converter with the combined triangular and trapezoidal modulation. They increase the accuracy of the predicted switching times by incorporating parasitic effects such as equivalent resistance, dead time, and limited dv/dt for the semiconductors. The derived equations are verified with a 20kW prototype. Measurements done with the prototype show a significant improvement over the idealized, lossless equations. This allows for predictive, open loop (sensor less) control of the DAB. The measurements show an accurate and fast step response of the DAB converter.
DOI:10.23919/EPE.2019.8915075