Author :
Whiting, J.M.W. ; Thompson, H.J.
Author_Institution :
ALSTOM Transp.
Abstract :
Although AC drives have almost completely taken over from choppers for propulsion duties in the field of railway traction, there still remain important applications - rheostatic braking, refurbishment of camshaft equipment and in auxiliary systems - where the chopper continues to be an essential technology at the disposal of the designer . Four-quadrant PWM converters, despite their complexity and drawbacks, offer such good power-factor and posphometric current control that they have become the preferred type of AC-to-DC converter on 15 kV and 25 kV railways
Keywords :
AC motor drives; AC-DC power convertors; PWM power convertors; braking; camshafts; choppers (circuits); electric propulsion; power factor; railway electrification; traction; 15 kV; 25 kV; AC drives; AC-to-DC converter; auxiliary systems; camshaft equipment; four-quadrant PWM converters; posphometric current control; power converters; power-factor; propulsion choppers; railway traction; refurbishment equipment; rheostatic braking;
Conference_Titel :
Electric Traction Systems, 2006. The 9th Institution of Engineering and Technology Professional Development Course on
Conference_Location :
Manchester
Print_ISBN :
9.7808634175e+012
