Technical Reports

Power Conditioning Hardware for AC Traction Based on the Utilization of TLRV Hardware and Technology

  • 01
  • Dec
  • 1981
AUTHOR: Graham W. McLean
SUBJECT: Track/Train Interactions
KEYWORDS: Tracked Levitated Research Vehicle, Railroad Traction, Power Converters, AC Traction Motors, Torque Pulsation, Two-Phase Cooling
ABSTRACT: This final report records the findings of an application study that investigated the feasibility of hardware and technology transfer to railroad traction of a multimegawatt power conditioning unit previously developed under sponsorship of the Department of Transportation. Various converter configurations capable of fulfilling the demanding traction requirements are presented. These converter drives are required to produce high starting torque combined with low torque pulsation and to demonstrate high efficiency. They are variants of the standard Graetz Bridge. These variants—all current-source converters— form three basic groups: (a) PWM (b) multibridge and (c) hidden-link. They supply either induction or synchronous traction motors and use either self- or machine commutation. A design and experimental program is proposed to compare selected converter drives both at subscale and full-scale levels. Also described is an experimental investigation into the feasibility of separating the boiling pool and condenser if two-phase Freon cooling of power semiconductors is used.