Inductor Current Envelope Tracking-Based Sensorless Control of Dual Active Bridge Converter

This article presents a hierarchical control scheme for dual active bridge converter featuring an inner sensorless inductor current envelope control loop. The ingenuity of this scheme lies in estimating the envelope of the fundamental component of the current and thereby controlling it. This also en...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2022-07, Vol.37 (7), p.7907-7915
Main Authors: Nayak, Gourahari, Dasgupta, Anindya
Format: Article
Language:English
Subjects:
Active control
Bridge circuits
Current measurement
Dual active bridge (DAB)
Electric bridges
Electric converters
Estimation
generalized average (GA) modeling
Mathematical models
Observers
Overcurrent
Saturation
solid state transformer (SST)
Switches
Switching frequency
Tracking control
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Summary:This article presents a hierarchical control scheme for dual active bridge converter featuring an inner sensorless inductor current envelope control loop. The ingenuity of this scheme lies in estimating the envelope of the fundamental component of the current and thereby controlling it. This also enables direct estimation of the peak current envelope, which can be seamlessly integrated with the overall scheme for overcurrent protection and saturation prevention. Estimation of the envelope, as opposed to estimating the current, results in a method that is equally effective as erstwhile reported techniques for saturation prevention. At the same time, it has a much less computational overhead. The proposed control scheme is validated through a laboratory prototype.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2022.3151503