Publikationen

2012
[82]	H.T. Houenouvo, W. Hofmann: Finite element analysis of the contact problem between graphite-brushes and -slip rings in double fed asynchronous three-phase generators, IEEE International Conference on Power Electrical Systems - PES, Chemnitz, 2012.
[81]	S. Krauß, N. Schwingal, W. Hofmann: Investigation of a 2/3-Step Voltage-Based Commutation Method for Matrix Converters, Applied Power Electronics Conference - APEC, Orlando, Florida, 2012.
[80]	B. Rückert, W. Hofmann: Commutation Strategy for Minimized Common Mode Voltage Using DIrect Power Control, Applied Power Electronics Conference - APEC, Orlando, Florida, 2012.

2011nach oben
[79]	K. Benath, V. Müller, W. Hofmann: High Efficient Winding Drives with Continuous Variable Transmission (CVT), European Power Electronics and Drives Conference - EPE, Birmingham, UK, 2011.
[78]	K. Benath, F. Klenke, W. Hofmann: Ansätze zur Beurteilung der Energieeffizienz von Antriebsystemen, ETG-Kongress, Fachtagung Energieeffiziente Antriebe und Leistungselektronik, ETG-Fachbericht 130, P 72, pp. 253--258, 2011.
[77]	L. Chen, W. Hofmann: Modelling and control of one bearingless 8-6 switched reluctance motor with single layer of winding structure, European Power Electronics and Drives Conference - EPE, Birmingham, UK, 2011.
[76]	L. Chen, W. Hofmann: Speed Regulation Technique of One Bearingless 8/6 Switched Reluctance Motors with Simpler Single Winding Structure, IEEE Transactions on Industrial Electronics, 2011.
[75]	M. Festa, W. Hofmann: Improved Performance through Multifunctional Material Utilization - Circumferential Cooling for Electric Motors, 1st International Electric Drives Production Conference - EDPC, Nürnberg, 2011.
[74]	M. Festa, H.-D. Eberhardt, W. Hofmann: Extremely Efficient but Compact — A Circumferentially Cooled Induction Motor, International Conference on Electrical Machines and Systems - ICEMS, Beijing, China, 2011.
[73]	E. Fleischer, W. Hofmann: Auslegung eines Asynchronversuchsmotors mit Massivläufer für ein Hochgeschwindigkeitsmagnetlager, 8. Workshop Magnetlagertechnik Zittau-Chemnitz, 2011.
[72]	E. Fleischer, Ch. Hufenbach, W. Hofmann: Experimentelle Bestimmung der Rotorverluste in einem homopolaren Magnetlager, VDE-VDI-Fachtagung Antriebssysteme, Nürtingen, 2011.
[71]	E. Fleischer, W. Hofmann: Application of Soft Magnetic Composites in Active Magnetic Bearings, IEEE Industrial Electronics Conference - IECON, Melbourne, Australia, 2011.
[70]	G.H. Geitner, G. Kömürgöz: Unified power flow based modelling of power split for Hybrid Electric Vehicles assuming three connections, IEEE CECNet International Conference on Consumer Electronics, Communications and Networks, Vol. 6, pp. 5464-5469, XianNing, China, 2011.
[69]	J. Jung, W. Hofmann: Investigation of Thermal Stress in the Rotor of Doubly-Fed Induction Generators at Synchronous Operating Point, IEEE International Electric Machines and Drives Conference - IEMDC, pp. 906-911, Niagara Falls, 2011.
[68]	H. Kasten, W. Hofmann: Electrical Machines with Higher Efficiency Through Combined Star-Delta Windings, IEEE International Electric Machines and Drives Conference - IEMDC, pp. 1390-1395, Niagara Falls, 2011.
[67]	F. Klenke, W. Hofmann: Energy-efficient control of induction motor servo drives with optimized motion and flux trajectories, European Power Electronics and Drives Conference - EPE, Birmingham, UK, 2011.
[66]	V.F. Mendes, C.V. de Sousa, S.R. Silva, B. and Hofmann W. Rabelo: Modeling and Ride-Through Control of Doubly-Fed Induction Generators during Symmetrical Voltage Sags, IEEE Transactions on Energy Conversion, 2011.
[65]	J. Schützhold, W. Hofmann: Messung und Analyse der temperaturabhängigen Verluste im Synchronmotor der Antriebsachsen einer Schlauchbeutel-Verpackungsmaschine, Intern. ETG-Kongress, Fachtagung Energieeffiziente Antriebe und Leistungselektronik, ETG-Fachbericht 130, 5.12, pp. 153--159, 2011.
[64]	Th. Schuhmann, W. Hofmann, R. Werner: Improving Operational Performance and Energy Demand of Active Magnetic Bearings using Optimal State Estimation and State Feedback, IEEE Transactions on Industrial Electronics, pp. 9, 2011.
[63]	S. Tenner, S. Günther, W. Hofmann: Loss Minimization of Electric Drive Systems Using a DC/DC Converter and an Optimized Battery Voltage in Automotive Applications, IEEE Vehicle Power and Propulsion Conference, Chicago, USA, 2011.
[62]	A. Tröger, T. Hempel, M. Würfel, W. Hofmann: Untersuchung der magnetischen Flussdichte in permanentmagnetisch erregten Synchronmaschinen in Außenläuferausführung, VDE-VDI-Fachtagung Antriebssysteme, Nürtingen, 2011.
[61]	Th. Windisch, W. Hofmann: Energieeffizienz des Traktionsantriebs in einem seriell-hybriden Doppelgelenkbus, 1. Tagung Hybridnahverkehrsbusse, Haus der Technik Essen e.V., 2011.
[60]	Th. Windisch, W. Hofmann: Loss Minimization of an IPMSM Drive Using Precalculated Optimized Current References, IEEE Industrial Electronics Conference - IECON, Melbourne, Australia, 2011.

2010nach oben
[59]	L. Chen, W. Hofmann: Analysis of Radial Forces Based on Rotor Eccentricity of Bearingless Switched Reluctance Motors, International Conference on Electrical Machines - ICEM, Rom, Italy, 2010.
[58]	L. Chen, W. Hofmann: Design Procedure of Bearingless High-speed Switched Reluctance Motors, International Symposium on Power Electronics, Electrical Drives, Automation and Motion - SPEEDAM, Pisa, Italy, 2010.
[57]	R. De Doncker, W. Hofmann, A. Mertens, U Schäfer: VDE Studie: Elektrofahrzeuge; Bedeutung, Stand der Technik, Handlungsbedarf, 2010.
[56]	M. Festa, H.-D. Eberhardt, W. Hofmann: Inter-laminar Flux and Eddy Current Losses in a Circum-ferentially Cooled Stator Core, International Conference on Electrical Machines - ICEM, Rom, Italy, 2010.
[55]	M. Festa, H.-D. Eberhardt, W. Hofmann: Advances in Power Density and Efficiency — Circumferentially vs. Conventionally Cooled Electric Motors, International Conference on Electrical Machines and Systems - ICEMS, 2010.
[54]	G.H. Geitner: The Bond Graph – an excellent modelling tool to study abstraction level and structure comparison, IEEE-VPPC, Lille, France, 2010.
[53]	W. Hofmann: Pulssteuerverfahren mit minimierter Gleichtaktspannung, ETG-Workshop Stromrichtergespeiste Elektromaschinen, Hannover, 2010.
[52]	H. Kasten, W. Hofmann: Optimal Number of Strands in Electrical Medium-Frequency Machines, International Conference on Electrical Machines - ICEM, Rom, Italy, 2010.
[51]	F. Klenke, W. Hofmann: Energieeffiziente Bewegungssteuerung schwingfähiger Antriebssysteme, SPS-IPC Drives, Nürnberg, 2010.
[50]	G. Kömürgöz, G.H. Geitner: Power flow oriented modelling for teaching modelling of dynamical systems, International Journal for Knowledge, Science and Technology - IJKST, Vol. 1, pp. 15-21, 2010.
[49]	S. Krauß, W. Hofmann: A Matrix Converter Based Induction Machine Drive with Direct Torque, Flux and Charge Control, International Power Electronics and Motion Control Conference - EPE-PEMC, Ohrid, Macedonia, 2010.
[48]	V.M. Mendes, C.V. Souza, S.R. Silva, B. Rabelo, S. Krauss, W Hofmann: Behavior of Doubly-Fed Induction Generator During Symmetrical Voltage Dips - Experimental Results, International Symposium on Industrial Electronics - ISIE, Bari, Italy, 2010.
[47]	B. Rabelo, W. Hofmann: Doubly-fed Induction Generator Drives for Wind Power Plants in Wind Power, Hrsg.: Muyeen, S. M., Intech, pp. 114-140, 2010.
[46]	B. Rückert, W. Hofmann: Enhanced Direct Power Control of Doubly Fed Induction Generator, International Power Electronics and Motion Control Conference - EPE-PEMC, Ohrid, Macedonia, 2010.
[45]	S. Tenner, W. Hofmann: A Comparison of Z-Source NPC and Z-source 2-Level Inverter, VDE-Kongress, 2010.
[44]	Th. Windisch, W. Hofmann: Verlustminimierung einer geregelten PMSM mit Reluktanzeffekt als Fahrmotor für einen Serienhybrid, ETG-Fachtagung und Elektromobilausstellung - EMA, ETG Fachbericht 126, pp. 127-132, 2010.

2009nach oben
[43]	R. Baburske, D. Domes, J. Lutz, W. Hofmann: Passive Turn-On Process of IGBTs in Matrix Converter Applications, European Power Electronics and Drives Conference - EPE, Barcelona, Spain, 2009.
[42]	Th. Bach, D. Wöhner, K. Takahasi, K. Hattori, M. Liese, W. Hofmann: Determining Negative Sequence Currents of Turbine Generator Rotors, International Conference on Electrical Machines and Systems - ICEMS, Tokyo, Japan, 2009.
[41]	M. Bruns, B. Rabelo, W. Hofmann: Investigation of Doubly-Fed Induction Generator Drives Behaviour at Synchronous Operating Point in Wind Turbines, European Power Electronics and Drives Conference - EPE, Barcelona, Spain, 2009.
[40]	M. Festa, H.-D. Eberhardt, W. Hofmann: Design Aspects of Circumferentially Cooled Frameless Machines, International Conference on Electrical Machines and Systems - ICEMS, Tokyo, Japan, 2009.
[39]	E. Fleischer, W. Hofmann: Einsatz von Pulververbundwerkstoffen in aktiven Magnetlagern zur Reduzierung der Rotorverluste, ETG-Kongress, ETG Fachbericht 119, pp. 35-40, Düsseldorf, 2009.
[38]	R. Galindo-del-Valle, B. Rabelo, M. Cotorogea, W. Hofmann: On the Emulation of an Isolated Wind Energy Conversion System: Experimental Results, CERMA, pp. 6, Guernavaca (Mexiko), 2009.
[37]	G.H. Geitner, G. Kömürgöz: Power Flow Oriented Modelling - a Modern Method for Teaching Modelling of Dynamical Systems, 4th ENMA International Conference on Engineering and Mathematics, Bilbao, Spain, 2009.
[36]	G.H. Geitner, W. Hofmann: Teaching Power Flow Oriented Modelling of Dynamic Systems - Basics, European Power Electronics and Drives Conference - EPE, Barcelona, Spain, 2009.
[35]	G.H. Geitner: Modellbildung dynamischer Systeme mittels Leistungsfluß, VVD - Tagung Verarbeitungsmaschinen und Verpackungstechnik, pp. 345-372, Dresden, 2009.
[34]	F. Klenke, W. Hofmann: Energieeffiziente Bewegungssteuerung von Linearmotoren, ETG-Kongress, ETG Fachbericht 119, pp. 97-102, Düsseldorf, 2009.
[33]	F. Klenke, V. Müller, W. Hofmann: Energy optimal motion control of servo motors and downsizing of components, European Power Electronics and Drives Conference - EPE, Barcelona, Spain, 2009.
[32]	B. Rabelo, W. Hofmann: Untersuchung des synchronen Betriebs von doppeltgespeisten Drehstrom-Asynchrongeneratoren, ETG-Kongress, ETG Fachbericht 119, pp. 135-141, Düsseldorf, 2009.
[31]	B. Rabelo, W. Hofmann, J.L. da Silva, R.G. de Oliviera, S.R. Silva: Reactive Power Control Design in Doubly Fed Induction Generators for Wind Turbines, IEEE Transactions on Industrial Electronics, Vol. 56, pp. 4154-4162, 2009.

2008nach oben
[30]	H.-A. Bärenklau, Th. Bach: Experience with Model Simplifications for making a large FEM Calculation Case computable, International Conference on Electrical Machines - ICEM, Villamoura, Portugal, 2008.
[29]	W. Hofmann: Energieoptimale Stellvorgänge und deren Auswirkung auf die Auslegung von rotatorischen und linearen Stellantrieben, VDI/VDE-Tagung Elektrisch-mechanische Antriebssysteme, VDI-Berichte Nr.1963, Böblingen, 2008.
[28]	W. Lhomme, R. Zanasi, G.H. Geitner, A. Bouscayrol: Different Graphical Descriptions of Clutch Modelling for Traction Systems, ElectrIMACS, Quebec, Canada, 2008.
[27]	M. Paul, W. Hofmann, B. Frei: Schleppverluste bei permanenterregten Synchronmaschinen und deren Reduzierung, EMA Elektromobilausstellung und wiss. Konferenz, Aschaffenburg, 2008.
[26]	B. Rabelo, W. Hofmann, R. Gaiba, J.L. da Silva, S.R. Silva: Reactive Power Control in Doubly-Fed Induction Generators for Wind Turbines, IEEE Power Electronics Specialists Conference - PESC, pp. 106-112, Rhodes, Greece, 2008.
[25]	B. Rückert, W. Hofmann: Simulation of CMV-minimized Direct Power Control for Doubly Fed Induction Generators, 1st EPE Wind Energy Chapter, Delft, Netherlands, 2008.
[24]	B. Rückert, W. Hofmann: CMV-minimized Direct Power Control of the Grid Side Connected Converter in Doubly Fed Induction Generators, International Symposium on Power Electronics, Electrical Drives, Automation and Motion - SPEEDAM, pp. 1455-1459, Ischia, Italy, 2008.
[23]	B. Rückert, W. Hofmann: Direkte Leistungsregelung von doppeltspeisenden Asynchrongeneratoren zur Minimierung der Gleichtaktspannung, VDI/VDE-Tagung Elektrisch-mechanische Antriebssysteme, VDI-Berichte Nr.1963, Böblingen, 2008.
[22]	M. Schramm, W. Hofmann: Magnetic Displacement and Velocity Sensor for Robust Control of Active Magnetic Bearing, IEEE Sensors, Salente, Italy, 2008.
[21]	J.L. da Silva, R.G. de Oliviera, S.R. Silva, B. Rabelo, W. Hofmann: A Discussion about a Start-up Procedure of a Doubly-Fed Induction Generator System, NORPIE, Helsinki, Finland, 2008.
[20]	R. Zanasi, G.H. Geitner, A. Bouscayrol, W. Lhomme: Different energetic techniques for modelling traction drives, ElectrIMACS, Quebec, Canada, 2008.

2007nach oben
[19]	A. Binder, M. Doppelbauer, P. Gold, W. Hofmann: Antriebssysteme: Innovationen - Trends - Mechatronik, ETZ, Heft 4, pp. 60-69, 2007.
[18]	Th. Bocklisch, W. Hofmann: Optimal and predictive energy management of Photovoltaic-Fuel cell hybrid systems with short-time energy storage., International Conference on Power Conversion, Intelligent Motion and Power Quality - PCIM, 2007.
[17]	L. Chen, W. Hofmann: Design of one rotary-linear permanent magnet motor with two independently energized three phase windings, IEEE Power Electronics and Drive Systems Conference - PEDS, pp. 1372-1376, Bangkok, Thailand, 2007.
[16]	L. Chen, W. Hofmann: Performance Characteristics of One Novel Switched Reluctance Bearingless Motor Drive, Power Conversion Conferences - PCC, pp. 608-613, Nagoya, Japan, 2007.
[15]	D. Domes, W. Hofmann: SiC-JFET in Contrast to High Speed IGBT in Matrix Converter Topology, IEEE Power Electronics Specialists Conference - PESC, pp. 54-60, Orlando, USA, 2007.
[14]	B. Frei, W. Hofmann: Schlepp- und Stillstandsverluste in Hybridfahrzeugen mit Leistungsverzweigung, Internationaler ETG-Kongress - Fachtagung Hybridantriebstechnik und Energieeffiziente elektrische Antriebe, ETG-Fachbericht 107, pp. 65-74, Karlsruhe, 2007.
[13]	W. Hofmann: Kap. 8: Elektrische Maschinen und Antriebe in Taschenbuch der Elektrischen Energietechnik, Hrsg.: W. Schufft, Hanser Fachbuch, pp. 349-406, 2007.
[12]	W. Hofmann: Kap. 9: Leistungselektronik in Taschenbuch der Elektrischen Energietechnik, Hrsg.: W. Schufft, Hanser Fachbuch, pp. 407-448, 2007.
[11]	W. Hofmann, M. Stiebler: Kap. V: Elektrotechnik in DUBBEL Taschenbuch Maschinenbau, Hrsg.: K.-H. Grote und J. Feldhusen, Springer Berlin, 22. Auflage, pp. V1-68, 2007.
[10]	S. Krauß, W. Hofmann: Binary Magnet Field Sensors as Information Source for Alternate Current Directions in Direct and Indirect Frequency Converters, AFRICON, Windhoek, Namibia, 2007.
[9]	S. Krauß, W. Hofmann: Threshold Triggered Magnetic Filed Sensors for Detecting the Load Current Direction for Frequency Converters, European Power Electronics and Drives Conference - EPE, Aalborg, Denmark, 2007.
[8]	B. Rabelo, W. Hofmann: Simple Fault Ride-Through Capability Analysis for Wind Power Plants under Different Grid Code Requirement, European Power Electronics and Drives Conference - EPE, Aalborg, Denmark, 2007.
[7]	B. Rückert, W. Hofmann: Direkte Leistungsregelung des netzseitigen Stromrichters bei doppeltgespeisten Asynchrongeneratoren, 12. Symposium Maritime Elektrotechnik, pp. 309-315, Rostock, 2007.
[6]	M. Schramm, W. Hofmann: Novel Magnetic Displacement Sensor for Mechatronical Systems, International Conference of the IEEE Industrial Electronics Society - IECON, pp. 2219-2224, Taiwan, 2007.
[5]	W. Schröppel, A. Mertens, B. Ponick, W. Hofmann, O. Drubel u.a.: Effizienz- und Einsparpotentiale elektrischer Energie in Deutschland - VDE-Studie, Energietechnische Gesellschaft, 100 Seiten, 2007.
[4]	Th. Schuhmann, W. Hofmann, E. Fleischer: Potentials of Reducing the Power Requirement of Magnetic Suspension Systems by Implementing a Linear Quadratic Gaussians Controller, European Power Electronics and Drives Conference - EPE, Aalborg, Denmark, 2007.
[3]	Th. Schuhmann, W. Hofmann: Erhöhung der Energieeffizienz schnelldrehender elektrischer Antriebe durch den Einsatz aktiver magnetischer Lagerungen, Internationaler ETG-Kongress - Fachtagung Hybridantriebstechnik und Energieeffiziente elektrische Antriebe, ETG-Fachbericht 107, pp. 227-236, Karlsruhe, 2007.
[2]	K. Stadie, M. Würfel, W. Hofmann: Verlängerte Standzeit bei doppeltgespeisten Drehstrom-Asynchrongeneratoren, Antriebstechnik, Heft 7, pp. 46-49, 2007.

missing yearnach oben
[1]	W. Hofmann, B. Frei, M. Paul, P. Tenberge: Stufenlos elektronisches Getriebe für Hybridfahrzeuge, VDI Fachtagung Mechatronik - VDI-Berichte Nr 1631, pp. 369-387.

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