Advanced Propulsion Systems for Urban Rail Vehicles |
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ac drive additional angle applications armature axle block bond braking called capacitor carries causing characteristics chopper chopper-controlled commutation compared components conducting connected considered constant continuously converter cooling coupling depends developed diode drive drop effect eight electrical electromagnetic energy equal equipment excited factor field field winding Figure filter flow flux flywheel frequency given harmonic hence impedance increasing induction motor input introduced inverter limit linear load load current machine magnetic maximum metro noise obtained onboard operation output voltage period phase possible presented primary propulsion system range rated reactor receiver rectifier reduced relay reluctance resistance resulting reverse rotating rotor running rails separate shown in Fig signal slip speed starting stator substation supplied switched tested third rail thyristor torque track circuit traction motors train transit systems triggered types unit vehicle voltage waveforms wheel winding