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52550
  
  

  8
Dec
2023
Technical Reports
PTC Communications: Cybersecurity Technology Review and Concept of Operations
Author
          Federal Railroad Administration

Subject
                    Positive Train Control,
                    Security

**Keywords:** Positive Train Control, PTC, railroad, shared network, Interoperable Train Control Messaging, ITCM, cybersecurity, encryption, National Institute of Standards and Technology, NIST, ELLI
**Abstract:** Researchers sought to determine how to improve the confidentiality of information passing through the...
Report Number
              DOT/FRA/ORD-23/39

  Office
              RDI-23
    1
Sep
1992
Technical Reports
Comparison of Major Parameters in Electrodynamic and Electromagnetic Levitation Transport Systems
Author
          W. S. Brown, C. R. Dauwalter, F. Heger, M S. Weinberg

Subject
                    Maglev,
                    Motive Power and Equipment

**Keywords:** Suspensions, High Speed Ground Transportation, Magnetic Levitation, Linear Induction Motors, Linear Synchronous Motors, Ride Comfort
**Abstract:** This study compiles quantitative design information that can be used in selecting a high-speed magnetic levitation system. Analytic models were developed for three...
Report Number
              DOT/FPA/NMI-92/15

  Office
              RRD
    1
Mar
1989
Technical Reports
Inverter-Controlled ac Induction Motor Propulsion System Volume I: Executive Summary
Author
          Jim Clemence

Subject
                    Motive Power and Equipment

**Keywords:** ac Traction Motor, dc Chopper, Inverter Drive Unit, Power Conversion Unit, Pulse-Width Modulation
**Abstract:** An inverter-controlled ac induction motor propulsion system for rail transit cars was designed, developed, and tested to verify projected benefits and applicability of ac over...
Report Number
              UMTA-CA-06-0175-89-1

  Office
              RRD
    1
Mar
1989
Technical Reports
Inverter-Controlled ac Induction Motor Propulsion System Volume II: Final Report
Author
          Jim Clemence

Subject
                    Motive Power and Equipment

**Keywords:** ac Traction Motor, dc Chopper, Inverter Drive Unit, Power Conversion Unit, Pulse-Width Modulation
**Abstract:** An inverter-controlled ac induction motor propulsion system for rail transit cars was designed, developed, and tested to verify projected benefits and applicability of ac over...
Report Number
              UMTA-CA-06-0175-89-2

  Office
              RRD
    1
Apr
1984
Technical Reports
Chopper Locomotive Demonstration Program Phase II, Final Report
Author
          Robert Hopkins

Subject
                    Motive Power and Equipment

**Keywords:** Chopper Controls, Power Factor, Electric Propulsion
**Abstract:** An E44 electric locomotive of 5000 hp, 6 axles and 6 motors was used as a test bed to evaluate full scale use of 6 separate high power DC to DC choppers for propulsion. The normal...
Report Number
              FRA/ORD-84/13

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