INGENIEUR
Figure A4: Typical LRT/MRT 750VDC Power Supply Distribution and Feeding Arrangement
Table A1 summarizes the philosophy and
design features of the Kelana Jaya Line LRT and
the Ampang Line LRT.
(III) Vehicle Traction Technology
Figure A5: Cross Section of 750V DC Power Rail
and Power Collector Assembly for LRT/MRT
Systems (Kelana Jaya Line LRT).
6
22
VOL
– SEPTEMBER
2015
VOL63
55JULY
JUNE
2013
Asynchronous or induction motor (robust squirrelcage rotor) has always been the work-horse of
electric drive technology and is thus ideal for
railway traction/propulsion. Rotary induction
motors dominate the world of electric drives,
including the rail traction system drives.
Most induction motors are designed to operate
from a three-phase source of alternating voltages
at constant speed.
For variable speed drives, the source is
normally an inverter that uses solid-state switches
to produce approximately sinusoidal voltages and
currents of controllable magnitude and frequency
Three-phase drive technology with induction
motors and voltage-sourced inverters (VSI) is the
industry standard for rail vehicle drive technology
as shown in Figure A7 and Figure A8.