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Ing. Luděk Schreier, CSc.

Phone +420 266 052 394 E-mail schreier@it.cas.cz Room M2410 Department Department D 6 - Electrical Engineering and Electrophysics Position vice head of Department of electric machines, drives and power electronics Research area theory of electric machines and drives
Curriculum vitae
Born on March 18th 1944 in Prague. He graduated from the Technical University in Prague, Faculty of Electrical Engineering in 1967. He specialized in the area of electrical machines and apparatus. He worked in ZPA Košíře in development of control systems for large generators for a short time. He works as the head of the Department of the Dynamics of Electric Machines, Drives, and Power Electronics of the Institute of Thermomechanics.
He took part in solution of problems connected mainly with transient phenomena of induction motors and lately in solution of dynamic problems of synchronous machines. He obtained his Ph.D. degree in 1978.
He has been the principal investigator of research grant “Modeling of Drive Systems Utilizing Electrical Motors of Special Design Fed from Electronic Converters” no. 102/97/0464 since 1997 to 1999, of grant project “Analysis and Optimization of Drive Systems with Advanced Types of Electrical Machines with Respect to Utilization of Minimized Converter Topologies” no. 102/01/0181 since 2001 to 2003, and of grant project “Analysis and Optimization of AC Electrical Drive System with Reduced Number of Switching Elements of Inverter“ no. 102/04/0215 since 2004.
He has also worked as a supervisor of Ph.D. students. He is an author or co author of more than 100 papers published in Czech and foreign scientific journals and in proceedings of international conferences.

View author's publications in the ASCR database
Selected publications
Schreier, L., Chomát, M., Klíma, J.: "Analysis of Three-Phase Induction Machine Operation under Two-Phase Supply". IEEE International Conference on Industrial Technology ICIT'02, Bangkok, Thajsko, December 11 14, 2002, pp. 107-112.
Schreier, L.: "Zero sequence in Stator Currents of Induction Machines." Acta Technica CSAV, Vol. 47, ISSN 0001-7043, 2002, pp. 199 138.
Schreier, L., Chomát, M., Klíma, J.: "Rise of the Third Space Wave of the Current Layer and Field Density in the Air Gap of Three-Phase Induction Machine". XI. International Symposium on Electromagnetic Fields in Electrical Engineering ISEF 2003, ISBN 86-435-0561-7, Maribor, Slovenia, September 18-20, 2003, Vol. 1, pp. 146-154.
Schreier, L., Chomát, M.: "Two-Phase Supply of Induction Machine with One Phase Open". 15th International Conference on Electrical Drives and Power Electronic EDPE'03, ISBN 80-89061-77-X, High Tatras, Slovakia, September 24-26, 2003, pp. 238-243.
Schreier, L., Chomat, M., Klima, J.: "Modelling of two-phase supply of three-phase induction motor." The 7th World Multiconference on Systemics, Cybernetics and Informatics (SCI), ISBN 980-6560-01-9, Orlando, USA, July, 27-30, 2003, CD-ROM pp.412-417.
Schreier, L., Chomat, M.: "Influence of third space harmonic wave of magnetic density on currents and torque of induction motor." International Conference on Advanced Methods of Theory of Electrical Engineering AMTEE 2003, Pilsen, Czech Republic, September 10-12, 2003, CD-ROM pp. D47-D50.
Schreier, L., Chomat, M.: "Two-phase supply of induction machina with one stator phase open". International Conference on Electrical Drives and Power Electronics EDPE´03, ISBN 80-89061-77-X, High Tatras , Slovensko, September 24-26, 2003, CD-ROM, pp. 238-243.
Schreier, L., Chomat, M., Bendl, J., Klima, J.: Two-Phase Emergency Feeding of Three-Phase Induction Motors. Proc. of the 3rd IFAC Symposium on Mechatronics Systems, Sydney, Australia, pp. 517-522, (2004)
Schreier, L., Chomat, M.: Model of Doubly Fed Machine with Four Slip Rings on Rotor. (ISBN 83-88906-95-X), Proc. of the 5th International Workshop on Research and Education in Mechatronic REM 2004, Kielce-Cedzyna, Poland, pp. 61-66, (2004)
Schreier, L., Klima, J.: Two-Phase Emergency Feeding of Induction Motors by Injected Currents- Analysis, Proc. of the 4th WSEAS International Conference on Power Engineering Systems (ICOPES 2005), Rio de Janeiro, Brazil, April 25 - 27, 2005, ISBN 960-8457-19-X, pp.1-6.
Schreier, L., Bendl, J., Klima, J.: Two-Phase Emergency Feeding of Induction Motors by Injected Currents- Discussion. Proc. of the 4th WSEAS International Conference on Power Engineering Systems (ICOPES2005), Rio de Janeiro, Brazil, April 25 - 27, 2005, ISBN 960-8457-19-X, pp. 7-12.
Schreier, L., Chomat, M., Bendl, J.: Reduction of Losses in Induction Motor under Emergency Operation. Proc. of the XLI International Symposium on Electrical Machines, SME´2005, vol. 2, Opole-Jarnołtówek, Poland, June 14 - 17, 2005, ISBN 83-88492-74-8, pp. 407-414.
Schreier, L., Chomat M.: Zero-Sequence Component in Three-Phase Induction Motors. Joint Czech-Polish Conference on Project GACR 102/03/0813, Low Voltage Electrical Machines, Brno 2005, November 14 - 15, 2005, ISBN 80-214-3047-8, pp. 97-108.
Schreier, L., Bendl, J., Chomat, M.: Influence of Stator-Current Zero Sequence on Magnetic Field and Stray Losses in Induction Machine under Emergency Operation. 7th International Conference AMTEE´05, Part II., Pilsen, Czech Republic, September 12 - 14, 2005, ISBN 80-7043-392-2, Section E pp. 39-44.
Schreier, L., Bendl, J., Chomat, M., Klima, J.: Possibility of Reducing Stray Losses and Parasitic Torques in Two-Phase Emergency Feeding of Induction Motors. Acta Technica CSAV 51, č. 2, 2006, pp. 109-131, ISSN 0001-7043.
Schreier, L., Bendl, J., Chomat, M.: Contribution to Improvement of Fault Tolerance of Electric Drives. 8th Symposium with Institute of Thermomechanics ASCR and Institute for Drive System and Power Electronics of the Leibniz University of Hannover, September 27 - 28, 2006, Hannover, pp.20-27.
Schreier, L., Bendl, J., Chomat, M., Klima J.: Contribution to Problems of Emergency Feeding of Induction Motor by Injected Currents. Proc. of IASTED International Conference on Power, Energy, and Applications Gaborone, BW. September 11-13, 2006. pp. 77-82. ISBN 0-88986-616-3.

Projects
2008-2010 GA102/08/0424Imrovement of Reliability of AC Variable Speed Drives
2004-2006 GA102/04/0215Analysis and optimization of AC electrical drive system with reduced number of switching

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