High Efficiency Control Method for Non-Isolated Three-Port DC/DC converter

Conference contribution
(Conference Contribution)

Publication Details

Author(s): Han Y, Kaiser J, Ott L, Schulz M, Fersterra F, Gosses K, Wunder B, März M
Editor(s): VDE
Publication year: 2017
ISBN: 978-3-8007-4429-9
Language: English


This paper presents a non-isolated
three-port DC/DC converter which is optimized to connect a three-wire, bipolar ±380 VDC
microgrid to different sources and loads like photovoltaics, batteries and fuel
cells. A novel control method is used to reduce the switching losses and
achieve an ex­tremely high efficiency over a broad operating range.

Conventionally, pulse-width modulation
(PWM) with a constant switching frequency is used to generate switching pulses.
Yet, in order to reduce switching losses and increase the overall system
efficiency, Triangular Current Mode (TCM) or Criti­cal Current Mode (CrCM)
control is intro­duced to achieve Zero Voltage Switching (ZVS) for every
operating point. This also allows the use of higher switching frequencies resulting
in greatly reduced passive component sizes.

Conclusively, a 6 kW prototype DC/DC
converter is presented to verify the proposed control method. The prototype
achieves a peak efficiency of 99.3%.

FAU Authors / FAU Editors

Han, Yunchao
Lehrstuhl für Leistungselektronik
März, Martin Prof. Dr.
Lehrstuhl für Leistungselektronik
Wunder, Bernd
Lehrstuhl für Leistungselektronik

External institutions with authors

Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie (IISB)

How to cite

Han, Y., Kaiser, J., Ott, L., Schulz, M., Fersterra, F., Gosses, K.,... März, M. (2017). High Efficiency Control Method for Non-Isolated Three-Port DC/DC converter. In VDE (Eds.), Proceedings of the 2017 PCIM Asia. Shanghai, CN.

Han, Yunchao, et al. "High Efficiency Control Method for Non-Isolated Three-Port DC/DC converter." Proceedings of the 2017 PCIM Asia, Shanghai Ed. VDE, 2017.


Last updated on 2019-01-07 at 12:53