A New Dual-Active Soft-Switching Converter for an MTEM Electromagnetic Transmitter

Xuhong Wang; Yiming Zhang; Wei Liu

A New Dual-Active Soft-Switching Converter for an MTEM Electromagnetic Transmitter

Xuhong Wang

Yiming Zhang

Wei Liu

Vol. 17, No. 6, pp. 1454-1468, Nov. 2017

10.6113/JPE.2019.17.6.1454

Auxiliary windings

Cut-off diodes

Dual-active soft-switching

MTEM transmitter

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Abstract

In this study, a new dual-active soft-switching converter is proposed to improve conversion efficiency and extend the load range for an MTEM electromagnetic transmitter in geological exploration. Unlike a conventional DC/DC converter, the proposed converter can operate in passive soft-switching, single-active soft-switching, or dual-active soft-switching modes depending on the change in load power. The main switches and lagging auxiliary switches of the converter can attain soft-switching over the entire load range. The conduction and switching losses are greatly reduced compared with those of ordinary converters under the action of the cut-off diodes and auxiliary windings coupled to the main transformer in the auxiliary circuits. The conversion efficiency of the proposed converter is significantly improved, especially under light-load conditions. First, the working principle of the proposed converter is analyzed in detail. Second, the relationship between the different operating modes and the load power is given and the design principle of the auxiliary circuit is presented. Finally, the Saber simulation and experimental results verify the feasibility and validity of the converter and a 50 kW prototype is implemented.

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Cite this article

[IEEE Style]

X. Wang, Y. Zhang, W. Liu, "A New Dual-Active Soft-Switching Converter for an MTEM Electromagnetic Transmitter," Journal of Power Electronics, vol. 17, no. 6, pp. 1454-1468, 2017. DOI: 10.6113/JPE.2019.17.6.1454.

[ACM Style]

Xuhong Wang, Yiming Zhang, and Wei Liu. 2017. A New Dual-Active Soft-Switching Converter for an MTEM Electromagnetic Transmitter. Journal of Power Electronics, 17, 6, (2017), 1454-1468. DOI: 10.6113/JPE.2019.17.6.1454.