WO2005119895-A1  HAEFNER F ET AL: "ELEKTRISCHE AUSRUESTUNG DER DIESELTRIEBZUEGE BAUREIHE 610 DER DEUTSCHEN BUNDESBAHN" ELEKTRISCHE BAHNEN, OLDENBOURG, R., MUNCHEN, DE, vol. 91, no. 7, 1 July 1993 (1993-07-01), pages 228-236, XP000383546 ISSN: 0013-5437;  FISCHER J W: "AC three-phase power transmission system for Amtrak's new locomotives F69PH-AC" JOINT IEEE/ASME RAILROAD CONFERENCE. PHILADELPHIA, APRIL 25 - 27, 1989, NEW YORK, IEEE, US, 25 April 1989 (1989-04-25), pages 7-11, XP010086581 NEW YORK, IEEE, US;  LIXIANG WEI ET AL: "A dual PWM scheme for three-level voltage source converter system with IGBT modules" INDUSTRIAL ELECTRONICS SOCIETY, 1998. IECON '98. PROCEEDINGS OF THE 24TH ANNUAL CONFERENCE OF THE IEEE AACHEN, GERMANY 31 AUG.-4 SEPT. 1998, NEW YORK, NY, USA,IEEE, US, vol. 2, 31 August 1998 (1998-08-31), pages 755-760, XP010308016 ISBN: 0-7803-4503-7US7385372-B2  Fischer, J.W.: "AC Three-Phase Power Transmission System for Amtrak's New Locomotives F69PH-AC"; Joint-IEEEASME Railroad Conference,, Phila, Apr. 25-27, 1989, NY IEEE, US_Apr. 25, 1989, pp. 7-11.;  German Article: "Electric Equipment for Diesel Multiple Units of the 610 Class of The German National Railways" Autor: Franz Haefner et al. Source: 398 EB Electronic Railways, 91 Jul. 1993, No. 7, Munich, Federal Republic of Germany Copyright Restriction Only the 1st Page is provided.;  Hafner F. et al.: "Electrical equipment of the Diesel impulse courses series 610 of the German Federal Railroads" Electrical courses, Oldenbourg, R., Munchen, DE vol. 91, No. 7, Jul. 1, 1993 pp. 228-236.;  Hafner F. et al.: "Elektrische Ausruestung Der Dieseltriebzuege Baureihe 610 Der Deutschen Bundesbahn", Elektrische Bahnen, Oldenbourg, R., Munchen, DE, vol. 91, No. 7, Jul. 1, 1993, pp. 228-236.;  Jovanovic, "An Optimal Direct Torque Control Strategy for Brushless Doubly-Fed Reluctance Motors", School of Engineering and Technology, Jan. 1, 1998, 6 page(s), Northunbria University.;  Kwasinski, "Time Domain Comparison of Pulse-Width Modulation Schemes", IEEE Power Electronics Letters, Sep. 1, 2003, 5 page(s), Vol.1 vol. 1, No. 3, IEEE.;  Lixiang Wei et al.: A Dual PWM Scheme for Three-level Voltage Source Converter System with IGBT Modules Industrial Electronics Society, 1998, vol. 2, pp. 755-760.;  PCT International Search Report_mailed Oct. 14, 2005.;  PCT Written Opinion.AU2005251188-B2  a) HAEFNER ET AL: "ELEKTRISCHE AUSRUESTUNG .....BUNDESBAHN";  b) LIXIANG WEI ET AL: "A dual PWM... converter system"