Project

In the TELEV project, a motor converter is being developed for Urban Air Mobility applications. The aim is to achieve an efficiency of 99% to minimize the battery mass and/or increase the range.

The focus is on a sophisticated, innovative air-cooling concept based on two heat-spreading mechanisms. Firstly, the concentrated heat loss from the applied prepackages (SMD component with an embedded MOSFET) is first conducted vertically and then horizontally to the cooling fins located on the casing surface. This achieves a large spread and distributes the heat over the entire length of the cooling fins. Secondly, a total of 60 SiC MOSFETs of the B6 bridge are distributed over the entire circumferential surface of the housing. This physical distribution of the semiconductors ensures that the heat loss is transferred to the heat sink over a large area, thus achieving a further heat spread already at the point where the losses occur. This allows additional fluid cooling infrastructure to be avoided, resulting in weight savings and increased reliability.

In addition, the further development of "prepackages" using PCB embedding technology simplifies the packaging and interconnection technology, leading to an enormous price reduction in the overall inverter design. The embedded individual chips are extended by a ceramic base insulation on the bottom side. This provides the thermally low-resistance path to the heat sink with complete electrical insulation in a space-saving package that enables extremely flat, cost-effective, and lightweight inverter designs.