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Frozen leg operation of a three-phase dual active bridge DC/DC converter at light loads

Haghbin, S ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1109/APEC.2018.8341589
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2018
  4. Abstract:
  5. 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 overvoltage. 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. © 2018 IEEE
  6. Keywords:
  7. Bridges ; Power electronics ; Semiconductor diodes ; Silicon carbide ; Silicon compounds ; Wide band gap semiconductors ; Anti-parallel diodes ; DAB converters ; Dual active bridges ; External hardware ; High-efficiency ; Non destructive ; Protective action ; Secondary-side ; DC-DC converters
  8. Source: Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC ; Volume 2018-March , 18 April , 2018 , Pages 3385-3391 ; 9781538611807 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/8341589