Input Parallel Output Series Structure of Planar Medium Frequency Transformers for 200 kW Power Converter: Model and Parameters Evaluation

Abstract

Nowadays, the demand for high power converters for DC applications, such as renewable sources or ultra-fast chargers for electric vehicles, is constantly growing. Galvanic isolation is mandatory in most of these applications. In this context, the Solid State Transformer (SST) converter plays a fundamental role. The adoption of the Medium Frequency Transformers (MFT) guarantees galvanic isolation in addition to high performance in reduced size. In the present paper, a multi MFT structure is proposed as a solution to improve the power density and the modularity of the system. Starting from 20kW planar transformer model, experimentally validated, a multi-transformer structure is analyzed. After an analytical treatment of the Input Parallel Output Series (IPOS) structure, an equivalent electrical model of a 200kW IPOS (made by 10 MFTs) is introduced. The model is validated by experimental measurements and tests.

Investigating the Shielding Effect of Pulse Transformer Operation in Isolated Gate Drivers for SiC MOSFETs

“…Various studies revealed the leading incentives and expansion of this technology which can induce momentous impacts on system modeling and assemblage, prompting paragon transitions within the entire power electronics industry [9,10]. The two predominantly engaged semiconductor materials are silicon carbide (SiC) and gallium nitride (GaN), which surpass their silicon (Si) counterpart by acquiring substantial intrinsic properties, making it feasible to intensify the switching frequency of converters from a few hundred kHz to the MHz frequency region [11,12]. However, optimization always comes with a cost; with every advance-Energies 2021, 14, 3866 2 of 16 ment, researchers and analysts are confronted with challenges and impediments to realize upgraded power converter designs.…”