Frozen Leg Operation of a Three-Phase Dual Active Bridge DC/DC Converter at Light Loads
Paper in proceedings, 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.

Author

Saeid Haghbin

Chalmers, Electrical Engineering, Electric Power Engineering

Frede Blaabjerg

Aalborg University

Farzad Yazdani

Sharif University of Technology

Amir Sajjad Bahman

Aalborg University

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,

Subject Categories

Other Physics Topics

Vehicle Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/APEC.2018.8341589

ISBN

9781538611807

More information

Latest update

1/16/2019