Operating devices for the energy transition of the future

Modern radiation sources, plasmas, the energy transition, data transmission with light (VLC) require highly efficient fast and ultra-modern electronic operating devices. These are researched and developed in the power electronics laboratory.

The requirements for precise current limiting, high output voltages with simultaneous high frequencies can only be met by electronic ballasts. In order to achieve optimum system efficiency, these must be adapted to the respective lamp. Optimization of the lamp and ballast system requires expertise in both power electronics and lamp physics.

The Lighting, ECG and Plasma Technologies working group combines knowledge of lamp-specific requirements and power electronics know-how. This intersection allows us to efficiently perform system developments and system optimizations for our customers.

One focus of our power electronics R&D activities is the research and development of MHz inverters for the operation of inductively coupled plasmas. By using modern power semiconductors with large bandgap (SiC and GaN) it is possible to realize MHz inverters, which can provide power up to 25 kW at efficiencies up to 95%.

Beside the ballasts for plasma emitters we are also engaged in the development of ballasts for LED emitters. Here, the focus is on digitally controlled ballasts with which the highest efficiencies, long lifetimes and extremely compact solutions can be implemented. The digital control and the compact design also makes it possible to integrate advanced intelligence into the luminaires. For example, VLC or WIFI as well as pedestrian detection or similar can be implemented in a street light.

Another focus is the development of power factor correction circuits to supply lamp ballasts in the multi-kilowatt range. These are required by law, reduce grid disturbances and make the operation of large-scale systems in areas with low grid load capacity possible in the first place.