Deadbeat Current Controller for Bidirectional Dual-Active-Bridge Converter Using an Enhanced SPS Modulation Method

A Dual Rising Edge Shift Algorithm for Eliminating the Transient DC-Bias Current in Transformer for a Dual Active Bridge Converter

“…An occurrence of the DC-bias current in DAB converters is a well-known and widely documented fact [11,[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. This phenomenon can lead to a saturation of the auxiliary inductor or the transformer magnetic circuit, which in turn can cause a serious fault of power electronic devices due to an overcurrent [11].…”

“…This rise occurs relatively quickly (within a fraction of a switching period); therefore, the only way to avoid it is to apply countermeasures a priori to its occurrence. Thus, the reported solutions to this problem focus mainly on an appropriate modification of the SPS modulation scheme during the transition process [20][21][22][23][24][25][26][27][28] (the solution presented here is based on the same idea).…”

“…In [20,21], model predictive controllers are proposed. They rely on current and voltage measurements, as well as on some system parameter values.…”

“…An algorithm proposed in this paper is an alternative to the above-mentioned solutions [20][21][22][23][24][25][26][27][28]. It is an extension of the SPS modulation scheme, allowing for the elimination of a transient DC-bias current in transformer windings.…”

“…All the algorithms presented in [20][21][22][23][24][25][26][27][28] have different strengths and weaknesses. Based on the detailed analysis of them, the authors identified some positive features, which can be used to compare their usefulness.…”