Research on transient DC bias analysis and suppression in EPS DAB DC-DC converter

T Dai, J Qin, G Ge, C Zhou, L He, J Zhai, J Li - IEEE Access, 2020 - ieeexplore.ieee.org
During excitation and demagnetization phase for the superconducting magnet, in dual-
active-bridge (DAB) converter based power supply, a dc bias may occur in high-frequency
transformer and thus lead to the faults. In this paper, an improved transient extend-phase-
shift (TEPS) control strategy is proposed to suppress the dc bias without any additional
hardware. Unlike the traditional extend-phase-shift (EPS) strategy, the voltages of the
transformer are asymmetrical for half a period after changing phase-shift and then remain …

[PDF][PDF] Research on Transient DC Bias Analysis and Suppression in EPS DAB DC-DC Converter

C ZHOU, L HE, J ZHAI, J LI - research.utwente.nl
During excitation and demagnetization phase for the superconducting magnet, in dual-
activebridge (DAB) converter based power supply, a dc bias may occur in high-frequency
transformer and thus lead to the faults. In this paper, an improved transient extend-phase-
shift (TEPS) control strategy is proposed to suppress the dc bias without any additional
hardware. Unlike the traditional extend-phase-shift (EPS) strategy, the voltages of the
transformer are asymmetrical for half a period after changing phase-shift and then remain …
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