Frozen Leg Operation of a Three-Phase Dual Active Bridge DC/DC Converter at Light Loads
Paper i proceeding, 2018

A three-phase dual active bridge (DAB) converter is designed and constructed as the DC/DC stage of a 50 kW fast charger station. Recently introduced 300A SiC power modules and drivers are utilized in the converter to obtain a high efficiency. Each module has two interconnected switches with anti-parallel diodes resembling a converter leg. It is observed that the driver halts the module operation as a result of protective actions such as over-current, gate under-voltage, or gate over voltage. In such case the module operates as a leg with two diodes until an external hardware signal resets the driver. The aim of this paper is to provide analysis, simulation and experiments for a three-phase DAB converter after a frozen leg condition in the secondary side of the converter and at light loads. The results show that this fault mode is non-destructive and it is possible to continue the operation by adjusting the controller and over-sizing the semiconductors.

Författare

Saeid Haghbin

Chalmers, Elektroteknik, Elkraftteknik

Frede Blaabjerg

Aalborg Universitet

Farzad Yazdani

Sharif University of Technology

Amir Sajjad Bahman

Aalborg Universitet

THIRTY-THIRD ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2018)

1048-2334 (ISSN)

3385-3391

33nd Annual IEEE Applied Power Electronics Conference and Exposition (APEC)
San Antonio, TX, USA,

Ämneskategorier

Annan fysik

Farkostteknik

Annan elektroteknik och elektronik