Blocking-Cap-Based DAB Converters

  • Deshang Sha
  • Guo Xu
Part of the CPSS Power Electronics Series book series (CPSS)


Blocking-cap-based dual active bridge (DAB) converter with wide voltage conversion gain is studied in this chapter. The DC blocking capacitor, which is used for avoiding the DC flux bias in the transformer of conventional DAB converter, is utilized to achieve better performance under wide voltage gain range. By changing PWM generating method under different voltage input, the converter can work in half-bridge and full-bridge mode correspondingly with presented hybrid control. To simplify the PWM generating method, the duty cycles of primary and secondary bridges are fixed as 50%. The power transfer characteristics, ZVS region, and RMS current are analyzed and are compared with the DAB converter using single-phase shift (SPS) control. The theoretical analysis and conclusion of the converter with the hybrid control are verified by experimental results from a 1 kW prototype.


Blocking-cap-based dual active bridge Wide ZVS range Wide voltage gain Single-phase shift control 


  1. 1.
    Inoue S, Akagi H (2007) A bidirectional DC-DC converter for an energy storage system with galvanic isolation. IEEE Trans Power Electron 22(6):2299–2306CrossRefGoogle Scholar
  2. 2.
    Bai H, Mi C, Gargies S (2008) The short-time-scale transient processes in high-voltage and high-power isolated bidirectional dc-dc converters. IEEE Trans Power Electron 23(6):2648–2656CrossRefGoogle Scholar
  3. 3.
    Li X, Li YF (2014) An optimized phase-shift modulation for fast transient response in a dual-active-bridge converter. IEEE Trans Power Electron 29(6):2661–2665CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Advanced Power Conversion Center, School of AutomationBeijing Institute of TechnologyBeijingChina

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