Key Research Areas

Compact converters enabling high power density

Due to the low switching losses when using the novel wide band-gap semiconductor generation made from gallium nitride and silicon carbide, respectively, it is possible to increase the switching frequency of power electronic systems significantly. As a consequence, the size of passive components, especially of the bulky ripple inductors, can be reduced, for the reason that less energy needs to be buffered in the system. The focus of the ECPE lighthouse project "Industrial Demonstrator on System Level" was on an additional power density increase by means of innovations in filter topology, semiconductor control and pareto front optimization of the overall system.

The control system gathers all measured values simultaneously and regulates the duty cycles of all six half bridges. The operation parameters can be transmitted using various interfaces (USB, CAN-Bus and Ethernet) or directly adjusted on the control panel. According to the electrical load conditions the control system supports the application of different operation modes (DCM, CCM, flat top modulation) during one mains period and rotary field period, respectively. In this way, die voltage-time-area of the PFC and motor inductors and thus their size can be further reduced. The size reduction of the CM filter is achieved by shifting the CM voltage into the DC link.

A further increase in power density can be achieved with Pareto front optimization. The required loss, EMC, thermal and volume models of all relevant components were developed and validated within this project.

The utilized low inductive SiC semiconductor power modules are developed in the context of the ECPE project "Switching Cell in Package". The project goal was the design of modular and scalable Power Electronics Building Blocks (msPEBBs). An additional innovation is the application of Chip Scale Packages (CSPs), which enables the DCB/PCB based power module manufacturing without the requirements for a clean room.

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Key Research Areas

FU integration – Highly integrated frequency converter

The overall objective of the project is the development of a modular frequency converter to be integrated into electric motors of circulating pumps with significantly reduced volume and weight, increased efficiency, and the reduction of electromagnetic interference.

 

Key Research Areas

SiCefficient: Increase of efficiency and range

The use of SiC semiconductors in drive inverters is becoming increasingly popular. SiC offers the possibility of increasing the power density and efficiency in the system through lower switching and conduction losses compared to silicon FETs.

 

Key Research Areas

HSHT - High-Speed-Hybrid-Turbo

Power generation from exhaust gas to electrify the turbocharging as well as to electrically support the power train is an innovative approach to meeting stricter CO₂ regulations through electric hybridisation.

Project

SpeedDrive

The ambition of the SpeedDrive project is to develop a high-speed drive that far exceeds what was thought possible with the current state of the technology.