Existing customers worldwide

imperix in a few figures

6 distributors worldwide

Customers in 42 countries

58MW installed
power worldwide

Catalogue of 24 products

Academic customers

Canada
University of Alberta
Concordia University
University of British Columbia
Cégep de Sept-îles
University of Windsor

USA
Arizona State University
California State University San Marcos
East Carolina University
Florida Atlantic University
Purdue University
Pennsylvania State University
SFU San Francisco State University
Stevens Institute of Technology
University of Texas
University of Texas Arlington
University of Texas Permian Bassin
University of Texas at San Antonio
University of Georgia
University of South Florida
University of New Mexico
University of Nebraska
University of Tennessee
USC University of South Carolina
Virginia Polytechnic Institute & State University

Mexico
Tecnológico de Monterrey
Universidad de Guadalajara

Colombia
Universidad Nacional de Colombia

Chile
UCSC University
UNAB Universidad Andres Bello
Universidad de Santiago de Chile
Universidad Técnica Federico Santa María

Costa Rica
University of Costa Rica

England
Cardiff University
College of Engineering Swansea University Bay
The University of Sheffield
University College London
University of Birmingham
University of Bath
University of Leeds

Norway
Universitetet i Agder

Finland
Tampere University of Technology
Turku AMK University

Sweden
Chalmers University of Technology
KTH Royal Academy of Technologies
Uppsala University

Netherlands
TU Delft
TU Eindhoven

Denmark
Aalborg University
Technical University of Denmark

Germany
Darmstadt University of applied science
Deutsches Zentrum für Luft- und Raumfahrt (DLR)
Helmut-Schmidt-Universität
KIT Karlsruher Institut Technologie
RWTH Aachen University
Technical University of Chemnitz
Technische Universität München
Univesity of Bremen
Universität der Bundeswehr München

France
Aix Marseille Université
INSA Lyon
Laplace
Université de Lorraine
Université Technologie Compiègne

Belgium
KU Leuven

Slovenia
University of Maribor

Morocco
Université Mohammed VI Polytechnique

Austria
TU Graz

Switzerland
ETH – Swiss Federal Institute of Technology in Zurich
EPFL – École polytechnique fédérale de Lausanne
HESSO
HEIA

Italy
Universita di Cassino
University of Cagliari
University of Padova
Università degli studi di Genova

Spain
Escola d’Enginyeria de Barcelona Est
Escuela Tecnica Superior de Ingenieria
University of the Basque Country
University of Extremadura
Universidad Loyola
Universidad de Oviedo
Universitat Politecnica Valencia
Universidad Pública de Navarra

Hungary
Budapest University

Bulgaria
Technical University of Sofia

Croatia
FERIT – Faculty of Electrical Engineering

Poland
AGH University of Science and Technology
University of Technology in Rzeszów

Tunisia
Ecole Nationale d’Ingénieurs

Russia
South Ural University

Kuwait
Public Authority for Applied Education and Training (PAAET)

Thailand
KMITL

India
Bannari Amaan Institute of Technology
Vellore Institute of Technology (VIT)

China
Beijing Jiaotong University
Beijing Science & Technology University
Chang’an University
Guangxi University
Nottingham Ningbo University
Shandong University
Southeast Universtity
Tianjin University
Tiangong University
Wuhan University
Zheijang University

South Korea
Gwangju Institute of Science and Technology (GIST)
Jeju National University
Jeonbuk Natl. University
Korea Electrotechnology Research Institute
Kyungpook National University
Paichai University
Yonsei University

Singapore
SIT Singapore Institute of Technology
Nanyang Technological University
NUS National University of Singapore
Berkeley Education Alliance for Research

Australia
University of Queensland
University of Tasmania
UNSW
Monash University

Japan
AIST – Fukushima Renewable Energy Institute
KUAS Kyoto University
Osaka University
Toyo University
Tohoku University

Vietnam
HCMC University

Pakistan
PIEAS Pakistan Institute of Engineering

Industrial customers

France
ArianeGroup
CEA Liten
Comeca Group
Eiffage Energie Systèmes
GE Medical
Safran
Schneider Electric
SuperGrid Institute
Traftor Europe

Netherlands
MI Partners

Holland
KEMA Labs
VONK EUA

Ireland
Analog Devices

Switzerland
CSEM
Daphne Technology
EMS
Greenmotion
H55
Maxwell technologies
Schaffner SA
Sécheron
Speedgoat
Sunon Swiss SA

Germany
Bosch GmbH
Hilite GmbH
SMA Solar Technology
Steremat Induktion

Spain
Fundacion Tecnalia
Monolithic Power Spain SL

Austria
KTM
SAL Silicon Austria Labs

Bulgaria
YottaVolt Ltd

Hungary
MVM Ungarian Electricity

China, Germany
GEIRI
Kuka China R&D
Unitech Embedded Consulting Service Co., Ltd

Japan
Hitachi Research Laboratory

Malaysia
TNB Research

Singapore
Rolls Royce

USA
Allied Motion
Argonne National Laboratory
NAVFAC
Maglev Aero Inc
Oak Ridge National Laoratory
RCT Systems
Sandia National Laboratories
Tesla

South Korea
ENTEC Electric & Electronic
K-GFM Co., Ltd
KIER – Korea Instute of Energy Research
LS Electric
Pionelectric Co, Ltd

SOME SCIENTIFIC PUBLICATIONS ENABLED BY IMPERIX Solutions

Publication date		Title		Published in			University	Country	Products used
Publication date	Type	Title	Authors	Published in	Abstract	Publisher	University	Country	Products used	Link	UID
02/09/2013	Conference	Fail-safe modular control platform for power electronic applications in R&D environments	Nicolas Cherix, Simon Delalay, Philippe Barrade, Alfred Rufer	2013 15th European Conference on Power Electronics and Applications (EPE)	This paper presents a modular control platform which is tailored for teaching and research applications. It aims at being entirely “student-proof” and features software-independent safety mechanisms, extensive signal conditioning and easy-to-use interfaces, dedicated to power electronics. A practical example with various HIL simulation results illustrates the attractiveness of the presented platform.	IEEE	EPFL	Switzerland	B-Box		1
08/09/2015	Conference	Control of a modular DC-DC converter dedicated to energy storage	Philippe Barrade, Emilien Coulinge, Alfred Rufer	2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe)	A DC-DC converter system is presented based on an Input-Series/Output-Parallel Dual Active Bridge structure, in a full modular design. The association of 4 elementary modules leads to a one stage DAB. The proposed converter is dedicated to interface a DC-voltage network with a battery based energy storage device. The paper aims to define and test a suited control strategy able to equalize the power flow in the two channels. The control is established using the Energetic Macroscopic Representation and the associated Inversion Based Control. The modelling method for elaborating the control is presented, together with experimental results.	IEEE	EPFL	Switzerland	B-Box, Power modules		2
09/11/2015	Conference	Comparison of Multistage Stacked Boost Architecture Topologies in Regards of the Relation between Duty Cycle, Number of Stages and Efficiency	Gina K. Steinke, Alfred Rufer	IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society	A step-up DC-DC converter (non-isolated) based on the current diverter principle is shown. This converter is intended for renewable energy sources or distribution networks for elevating the voltage from LV to MV levels. The relationship of stage number, duty cycle and efficiency is analyzed. In addition first measurement results with a low voltage prototype are shown.	IEEE	EPFL	Switzerland	Power modules		3
02/11/2016	Conference	Dead time and non-linearities compensation for CHB multi-level converters with integrated ESS feeding EV’s ultra-fast charging stations	U. Abronzini, C. Attaianese, M. D'Arpino, M. Di Monaco, A. Rufer, G. Tomasso	2016 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)	This paper deals with a compensation technique for non-linear behaviour of single phase modular multi-level power converter, feeding electric vehicle fast charging station with split integrated energy storage system. The proposed method calculates the voltage compensation on the basis of the error between the reference and the real currents. It allows highly improving the harmonic content of the grid current in steady-state conditions within a single period of fundamental.	IEEE	University of Cassino	Italy	B-Box, Power modules		4
16/03/2016	Journal	Feed-Forward-based Control in a DC–DC Converter of Asymmetric Multistage-Stacked Boost Architecture	Georgios Mademlis, Gina K. Steinke, Alfred Rufer	IEEE Transactions on Power Electronics	A new feed-forward control technique for a dc-dc step-up converter based on the asymmetric multistage stacked boost architecture (MSBA) is proposed. The developed feed-forward controller directly handles the load current and the perturbations that may be caused by the dynamic operation of the converter. Thus, there is no time delay for estimating the error in a control process, and therefore, both robust steady-state operation and high dynamic performance can be achieved. The asymmetric MSBA dc-dc converter is a single-output high-voltage topology that embodies several in-series active voltage-balancing circuits. Thus, there is a need for an improved balancing control method. This can be accomplished by replacing the conventional proportional-integral controllers with feed-forward type and therefore improved balancing between the stages can be attained, because the steady-state errors are suppressed and the dynamic response can be enhanced. A thorough theoretical analysis is conducted for verifying the stability of the suggested feed-forward control technique in an asymmetric MSBA converter, and selective simulation and experimental results are demonstrated in order to validate the effectiveness and feasibility of the proposed control scheme.	IEEE	Aristotle University of Thessaloniki	Greece	B-Box, Power modules		5
10/05/2016	Conference	DC-DC Converter based on the Asymmetric Multistage Stacked Boost Architecture with Feed-Forward Control for Photovoltaic Plants	Georgios Mademlis, Gina K. Steinke, Alfred Rufer	PCIM Europe 2016; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management	A new feed-forward control technique for a DC-DC step-up converter based on the asymmetric Multistage Stacked Boost Architecture (MSBA) is presented in this paper. The proposed closed loop control scheme can provide improved accuracy in the steady-state operation and high dynamic performance. The asymmetric MSBA converter is a single output high-voltage DC-DC step-up converter that comprises several in-series connected capacitors with active voltage balancing circuits. The converter can attain high voltage ratios and thus, it is a suitable solution for the high voltage transmission requirements of the large photovoltaic (PV) plants. Selective simulation and experimental results are presented in order to validate the effectiveness and the operational improvements of the proposed control system.	VDE	Aristotle University of Thessaloniki	Greece	B-Box, Power modules		6
05/09/2016	Conference	Input-series and output-series high voltage converter with active balancing circuit for N-1 operation	Nabais Lima Tiago, Alfred Rufer	2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe)	An input-series/output-series converter dedicated to high power applications is presented. The converter is composed of plural MF transformers based on DC-DC sub-converters. The series connection allows reaching input-voltage levels in the range of several tens or hundreds of kV. The power level can be increased by modularity, even if the size of one MF transformer is generally limited by the size of the available magnetic cores. Each sub-converter has at its primary side a 3-Level Half-Bridge inverter that generates the MF intermediary voltage. The output circuit of each sub-converter is a simple diode rectifier. The series input circuit is completed by an active balancing circuit which allows the N-1 operation of the installed channels with unmodified input voltage conditions. The paper presents the new topology together with the adopted control structure. The performance of the proposed architecture and its possible mode of operation with one or more disabled sub-converters is verified with a small-scale demonstrator.	IEEE	EPFL	Switzerland	B-Box, Power modules		7
15/04/2016	Conference	Reconnaissance de signatures énergétiques dans les micro-réseaux	Daniel Siemaszko	CONFREGE 2016	The future of distribution networks tends to include more and more computational power, embedded intelligence and smart metering on the high voltage level as well as the low voltage micro-grids. Several hardware solutions appeared to implement the so-called smart grids with measurement devices delivering data about the state of networks on various levels. This work introduces the use of a specific energetic signature for power converters in order to be able to get information on consumption profiles in a non-invasive manner in a residential area where prosumers generate their own energy with photovoltaic cells on their roofs. Technically speaking, the switching elements of power converters inject several harmonics which can be controlled in such a way that information can be transmitted to measurement devices. A simulated residential grid with several loads and PV converters has been run real-time with 1us sampled data, for being able to retrieve information through data mining methods. A dedicated controller for two power converters has been implemented in such a way that users can be differentiated by looking at the harmonic content of both current and voltage at the point of common coupling.			Switzerland			8
10/05/2016	Conference	Energetic Macroscopic Representation (EMR) and control scheme for the asymmetric 4-stage MSBA	Gina K. Steinke, Alfred Rufer	PCIM Europe 2016; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management	The Multistage Stacked Boost Architecture is a step-up converter topology intended for renewable energy generation systems or distribution networks. This paper concentrates on the Energetic Macroscopic Representation of this topology and the simulation of this representation as well as showing a functional control and a working prototype.	VDE	EPFL	Switzerland	B-Box, Power modules		9
05/09/2016	Conference	Control method and prototyping of the Multistage Stacked Boost Architecture (MSBA)	Gina K. Steinke, Alfred Rufer	2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe)	This paper includes a look into the resonant phenomena of the Multistage Stacked Boost Architecture and a dedicated control method for the MSBA converter to handle these resonances. A linearized fast feed-forward control relying on the feedback of the output current was implemented for the boost stage and the MSBA stages. This was verified by simulations as well as measurements with a low voltage prototype.	IEEE	EPFL	Switzerland	Power modules		10