89
Technische Universität Berlin
Research Interests / Projects
1. Energy Efficient Electric Drives
We are developing various methods to
increase efficency of drive systems e.g.
by improvement of low load efficiency
by motor design (e.g. Ld > Lq), software
based multi dimensional optimum geom-
etry parameter search, and online mini-
mum loss search depend on both load
and speed.
2. EV Control
We design motor controllers for electric
vehicles with minimum loss control strat-
egies based on analytical or numerical
algorithms.
3. Drive Production Technology
We are working on various technolo-
gies for large scale production, e.g. wind-
ing techniques combining high slots fill
factors with low production cost, per-
manent magnet magnetizers including
quality check during the magnetization
process, and folded power electronics
for motor integration.
4. Wind Power
We realize small wind turbines for urban
applications based on a modular system
with permanent magnet generators, and
we develop fast control systems for dou-
bly fed induction generators according
to latest grid connection requirements.
5. High speed drives
We have built several high speed drives
with induction and switched reluctance
machine in the 30,000 - 50,000 rpm
range. Currently we set up a permanent
magnet system.
Our lab provides power supply of up to
400 V, 50 Hz, and 630 kVA. There are
several variable frequency supplies, liq-
uid cooling units up to 100 °C and pow-
er measurement equiment for various
variable speed test benches. Our soft-
ware includes analytical tools for classical
induction, DC, synchronous and switched
reluctance motor design (own and com-
mercial tools), finite element software for
electromagnetics and multiphysics, and
mechanical construction software.
Foldable Power Electronics for Motor Integration
Modular wind power generator
IGCT Magnetizer with Integrated Quality Control of Magnets
