Comparison of coil topologies for inductive power transfer under the influence of ferrite and aluminum

…, M Springmann, P Gratzfeld - … on Ecological Vehicles …, 2016 - ieeexplore.ieee.org
In recent years, there has been growing interest in inductive power transfer (IPT) systems for
electric vehicles (EVs). Wireless power transfer systems consist of complex coil systems …

Design methodology for the electrification of urban bus lines with battery electric buses

M Tesar, K Berthold, JP Gruhler, P Gratzfeld - Transportation Research …, 2020 - Elsevier
Electrically powered buses reduce CO 2 and noise emissions in urban areas and thus
promote the trend towards more livable cities. Upon this reason, more and more cities are …

Comparison of magnetic couplers for inductive electric vehicle charging using accurate numerical simulation and statistical methods

K Knaisch, P Gratzfeld - 2015 5th International Electric Drives …, 2015 - ieeexplore.ieee.org
Inductive power transfer (IPT) systems developed rapidly in the last years. Nowadays, IPT
systems are widely used in a variety of applications, such as automated guided vehicles, …

Reliability comparison of bidirectional automotive DC/DC converters

M Murken, P Gratzfeld - 2017 IEEE 86th Vehicular Technology …, 2017 - ieeexplore.ieee.org
The energy consumption of modern vehicles has increased rapidly in the last years. Hence,
future vehicles require larger batteries and a higher generator power to supply the vehicle …

Gaussian process surrogate model for the design of circular, planar coils used in inductive power transfer for electric vehicles

K Knaisch, P Gratzfeld - IET Power Electronics, 2016 - Wiley Online Library
In recent years, there has been an increased interest in inductive charging systems for electric
vehicles. Since the efficiency of the charging system is highly dependent on the couplers …

Predicting traction energy demand of a light rail vehicle using deep learning methods

…, S Müller-Broich, L Hilmer, P Gratzfeld - 2021 IEEE Vehicle …, 2021 - ieeexplore.ieee.org
Determination of the energy demand is of major importance in order to be able to unlock
optimization potential at system level. However, the traction energy demand of rail vehicles …

Modeling of a three-phase inductive power transfer system in phasor domain for fast simulation

R Arnold, P Gratzfeld - 2013 3rd International Electric Drives …, 2013 - ieeexplore.ieee.org
Contactless charging of electric vehicles by means of inductive power transfer is becoming
increasingly popular in the recent years. In contrast to wired power interfaces, user-friendly …

Analysis and optimization of a solenoid coupler for wireless electric vehicle charging

K Knaisch, T Huck, P Gratzfeld - Wireless Power Transfer, 2017 - cambridge.org
In light of the increased interest in e-mobility, comfortable, and safe charging systems, such
as inductive charging systems, are gaining importance. Several standardization bodies …

Dynamic performance of two parallel-connected induction machines for traction drives

P Gratzfeld, HC Skudelny - 1984 Annual Meeting Industry …, 1984 - ieeexplore.ieee.org
The parallel operation of two induction motors on one frequency converter has found some
interest for railway drives. In this paper the transient behaviour of such drives is discussed. A …

Automatic tuning concept for a three-phase inductive power transfer system

R Arnold, P Gratzfeld - 2014 4th International Electric Drives …, 2014 - ieeexplore.ieee.org
Contactless charging of electric vehicles by means of inductive power transfer is becoming
increasingly popular in the recent years. In contrast to wired power interfaces, user-friendly …