Power Electronics and Drives, FHNW School of Engineering and Environment

We investigate issues at various levels (from semiconductors, magnetic materials up to system level). We extensively use simulations, develop innovative control and measurement techniques, and deliver tailor-made solutions that work efficiently and reliably.

Discover our range of tests in the field of power semiconductors and power electronics.

We use a range of design and simulation tools to develop power electronic converters. Our expertise in control, embedded software, reliability, and electromagnetics enables a holistic system perspective and targeted optimization. Hardware prototypes can be thoroughly tested in our laboratory.

Our activities include:

• Hardware design and construction of customized prototypes

• Electromagnetic design optimization using simulations

• Investigation of control methods and their implementation in hardware and software (microcontrollers, DSPs, FPGA)

• System-level reliability optimization through design and monitoring

• Investigation and evaluation of grid impacts of grid-connected systems

In addition to classical silicon transistors (IGBTs, MOSFETs), novel silicon carbide (SiC) power semiconductors are increasingly becoming a focus. Beyond their static and dynamic electrical behavior, module-level reliability is a key area of our research.

Key topics include:

• Reliability analysis and optimization using simulations and testing

• High-current power cycling test benches (ampere to kiloampere range) for lifetime assessment

• Monitoring methods for electrical and thermal operating parameters

• Algorithms for continuous estimation of aging conditions during operation

Left: Silicon carbide MOSFET module. Right: Infrared image of a power semiconductor module in operation.

Inductive components such as chokes and transformers play a central role in power electronics. Through field simulations and testing of magnetic materials, we contribute to the development of compact and efficient drive systems.

Our activities include:

• Measurement of magnetic properties of inductive components

• Field simulations of static components and electrical machines

• Test bench for determining core losses of magnetic materials under various signal waveforms