Professor Emeritus Konrad Reichert
ETH Zurich, Switzerland
Permanent-magnet machines, trends, problems and simplified simulation by fe-methods
View a video of the presentation here: https://vimeo.com/119794061
Our electric power system is based on electric machines for
generation (99.9 %), 3 - phase ac - transmission systems,
transformation: ac/ac-transformers, ac/dc- or dc/ac-converters, electric
machines for energy conversion (>60 %) as invented by Nikola Tesla.
In recent years the capabilities of electric machines has been extended
due to the progress in: permanent magnet materials, power electronics,
and control technology resulting in new electric machines with, high
efficiency, high torque, low or high speed, high performance and
controllability, low maintenance, and high reliability especially suited
for direct drives applications in: computers, manufacturing,
transportation, appliances, etc.
Design problems of PM machines such as: load torque, pulsation and
cogging minimization, operating parameters, losses in permanent magnets
and iron, identification of Ld-Lq-models for simulation and simulation
of magnetisation and demagnetization is being solved today by finite
element methods. The presentation gives details on an improved method
to solve these problems.
Dr. Konrad Reichert has made seminal contributions to the
introduction of numerical field methods, especially the finite element
method for electrical machine stimulation and design. He also developed
computer programs based on systems analysis and numerical field
calculation methods that advanced new motor technologies.
The finite element design packages for electrical machines developed
by him and his staff at the Swiss Federal Institute of Technology in
Zurich (ETH) made it easier to develop machines via computer-aided
design. They enabled simulations to define machine operating
characteristics and parameters such as voltages, inductances,
demagnetization limits, local loss distribution and torque and torque
ripple. His programs are used extensively today in commercial and
scientific applications in electrical machine design, permanent magnetic
manufacturing and university research worldwide.
His expertise has been critical to the design of large permanent
magnetic machines, such as gearless permanent magnet generators in
He was the recipient of the 2006 IEEE Nikola Tesla Award.