System design for power electronics
The (energy) efficiency of power-consuming products, from switched-mode power supplies, to electric and hybrid cars and railway traction drives, through to large industrial drives, is crucial. All of the latter technologies areas and more rely on power electronics, and each makes individual demands on the system, which have to be taken into account during the circuit design and layout.
Good solutions for improving energy efficiency and miniaturization of inverters include wide-bandgap (WBG) semiconductors like silicon carbide (SiC) and gallium nitride (GaN). However, taking advantage of their capability requires particularly tightly integrated electrical, thermal and mechanical design of the complete system, in order to facilitate the possibly high switching speeds and to take into account all relevant EMC aspects, while ensuring optimal thermal management of semiconductors and the package as a whole. This is seeing a trend towards complete system solutions, in which the switching cell itself is fitted with passive components like DC-link capacitors and output filters. Control and regulation, as well as safety, functions, are integrated into the package directly, rather than connected at a later stage.