#Triple octive highc series#

This, however, ignores the parasitic components such as DC-links’ ESR resistance and input/output terminals’ parasitic (or designed) inductive filters.

#Triple octive highc series#

One of the most common approaches in this latter type of modeling is to simplify the DAB topology to a single high-frequency transformer circuit which consists of two voltage sources connected in series with a lumped impedance, and allows for the derivation of general equations and basic dynamics description. On the other hand, a converter’s detailed mathematical description may allow for an in-depth analysis of the examined circuit, but comes at the cost of complexity. Results obtained this way are accurate but come at the cost of computation time due to the need to solve sets of Ordinary Differential Equations (ODE) numerically. One of them is to use advanced simulation environments where thermal libraries of power devices may be incorporated into the designed circuit. To analyze and solve the described issues, two approaches are mainly used. Finally, some papers such as focus on obtaining exact power characteristics (as a function of a phase-shift) in order to optimize the overall efficiency of a system consisting of DAB modules connected in parallel. This topic requires advanced modulation i.e., the Triple Phase-Shift (TPS), and may often overwhelm a reader by presenting a number of almost all possible switching states. On the other hand, intense research that is taking place in the field of modulation optimization aims to minimize the high-frequency transformer’s RMS current. This is often a problem even for a converter that utilizes the simplest modulation of the DAB, i.e., the Single Phase-Shift modulation (SPS). For instance, when the converter is used as an ES interface for grid applications, a strong need for feed-forward DC current estimation exists due to its non-linear power characteristics. All the discussed model properites are validated with a 1.5 kW 100 kHz SiC-based DAB prototype.ĭespite having been the focus of research for such a long time, new problems are appearing because more demanding constraints and requirements for control algorithms and modulation techniques are needed in modern DAB applications. Moreover, this paper shows the utilization of the GAM model higher harmonics’ complex magnitudes to calculate the steady-state power characteristics for bidirectional operation additionally, a method for a particular state variable waveform signal reconstruction is presented. Due to this approach, a Fourier series expansion may be easily applied to utilize Generalized Averaged Modeling (GAM)-a convenient method for modeling resonant and quasi-resonant power converters. This work analyses the converter which is controlled with a coherently defined Triple Phase-Shift (TPS) modulation which allows appropriate switching functions to be written, thus enabling the circuit’s state-space equations to be derived. This paper shows an elaboration of an equivalent electrical circuit of a Dual Active Bridge (DAB) and its application as a versatile tool for steady-states analysis in wide range of operating conditions.