In the framework of the More Electric Aircraft, the use of isolated DC/DC power conversion for the electrical power distribution system is one of the most investigated solutions. If the DC/DC converter produces a variable common-mode voltage, leakage current can flow in the inter-winding parasitic capacitance of the high-frequency transformer, leading to insulation deterioration and early failure. This paper proposes to use modified H-bridge structures, already employed in the photovoltaic system for DC/AC power converters, to enable constant common-mode voltage for isolated DC/DC converters. The analysis shows that this solution can achieve the same efficiency as the conventional one, while simulations and experiments show a strong reduction of the common-mode current flowing through the transformer. A reliability analysis showed that the lifetime of the high-frequency transformer can be extended with the proposed solution.

A PV-Inspired Low-common mode Dual Active Bridge Converter for Aerospace Applications / Buticchi, Giampaolo; Barater, Davide; Costa, Levy Ferreira; Liserre, Marco. - In: IEEE TRANSACTIONS ON POWER ELECTRONICS. - ISSN 0885-8993. - (2018), pp. 1-1. [10.1109/TPEL.2018.2801845]

A PV-Inspired Low-common mode Dual Active Bridge Converter for Aerospace Applications

Barater, Davide;
2018

Abstract

In the framework of the More Electric Aircraft, the use of isolated DC/DC power conversion for the electrical power distribution system is one of the most investigated solutions. If the DC/DC converter produces a variable common-mode voltage, leakage current can flow in the inter-winding parasitic capacitance of the high-frequency transformer, leading to insulation deterioration and early failure. This paper proposes to use modified H-bridge structures, already employed in the photovoltaic system for DC/AC power converters, to enable constant common-mode voltage for isolated DC/DC converters. The analysis shows that this solution can achieve the same efficiency as the conventional one, while simulations and experiments show a strong reduction of the common-mode current flowing through the transformer. A reliability analysis showed that the lifetime of the high-frequency transformer can be extended with the proposed solution.
A PV-Inspired Low-common mode Dual Active Bridge Converter for Aerospace Applications / Buticchi, Giampaolo; Barater, Davide; Costa, Levy Ferreira; Liserre, Marco. - In: IEEE TRANSACTIONS ON POWER ELECTRONICS. - ISSN 0885-8993. - (2018), pp. 1-1. [10.1109/TPEL.2018.2801845]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2841073
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