<rss version="2.0" xmlns:atom="https://www.w3.org/2005/Atom">
  <channel>
    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=PHNlYXJjaD48cGFyYW1zPjxwYXJhbSBuYW1lPSJkYXRlaW4iIHZhbHVlPSJhbGwiIC8+PHBhcmFtIG5hbWU9InN1YmplY3Rsb2dpYyIgdmFsdWU9Im9yIiAvPjxwYXJhbSBuYW1lPSJ0ZXJtc2xvZ2ljIiB2YWx1ZT0ib3IiIC8+PHBhcmFtIG5hbWU9ImxvY2F0aW9uIiB2YWx1ZT0iMCIgLz48L3BhcmFtcz48ZmlsdGVycz48ZmlsdGVyIGZpZWxkPSJpbmRleHRlcm1zIiB2YWx1ZT0iJnF1b3Q7Q2FycyAgKCBSYWlsIG1vdG9yICkgJnF1b3Q7IiBvcmlnaW5hbF92YWx1ZT0iJnF1b3Q7Q2FycyAoUmFpbCBtb3RvcikmcXVvdDsiIC8+PC9maWx0ZXJzPjxyYW5nZXMgLz48c29ydHM+PHNvcnQgZmllbGQ9InB1Ymxpc2hlZCIgb3JkZXI9ImRlc2MiIC8+PC9zb3J0cz48cGVyc2lzdHM+PHBlcnNpc3QgbmFtZT0icmFuZ2V0eXBlIiB2YWx1ZT0icHVibGlzaGVkZGF0ZSIgLz48L3BlcnNpc3RzPjwvc2VhcmNoPg==" rel="self" type="application/rss+xml" />
    <description></description>
    <language>en-us</language>
    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
    </image>
    <item>
      <title>CLASS BE 4/4 + BT MOTORCOACH TRAINS WITH CHOPPER DRIVES FOR SHUTTLE SERVICES ON THE FRAUENFELD-WIL RAILWAY</title>
      <link>https://trid.trb.org/View/271315</link>
      <description><![CDATA[Five motorcoaches and four driving trailers were delivered to the Frauenfeld-Wil Railway Company in Eastern Switzerland.  By referring to these vehicles, the authors describe electrical traction equipment, including the dc chopper, for a mains voltage of 1200 to 1500 v.  Such equipment is in use on various lines in Switzerland and abroad.  (Edited author abstract)]]></description>
      <pubDate>Fri, 27 Aug 2004 22:00:58 GMT</pubDate>
      <guid>https://trid.trb.org/View/271315</guid>
    </item>
    <item>
      <title>NEW MOTORCOACH TRAINS WITH THREE-PHASE MAIN AND AUXILIARY DRIVES</title>
      <link>https://trid.trb.org/View/271056</link>
      <description><![CDATA[Brown Boveri supplied and installed the electric traction components, the general vehicle equipment and the coach heating and ventilation systems for 15 new class BM/BS92 two-coach trainsets of the Norwegian State Railways.  The direct voltage link used in Brown Boveri's three-phase drive systems acts as a highly versatile busbar which can be used for different, parallel supply circuits and for power distribution when motorcoach compositions are formed.  As a result, new options are presented for a more economical solution to railway transport duties.]]></description>
      <pubDate>Fri, 27 Aug 2004 22:00:18 GMT</pubDate>
      <guid>https://trid.trb.org/View/271056</guid>
    </item>
    <item>
      <title>EXPERIENCE GAINED WITH WATER-COOLED THREE-PHASE TRACTION MOTORS FOR MOTORCOACHES</title>
      <link>https://trid.trb.org/View/271318</link>
      <description><![CDATA[Electric drives for motorcoaches require high-power traction motors which are light and compact, and which can be operated for long periods at a time without maintenance. Brown Boveri have responded to this need by developing a rugged, metal-enclosed asynchronous motor which offers high speeds and quiet operation.  The motor is cooled by water instead of air.  A heat-exchanger, which makes use of the motor's thermal losses to heat the passenger compartment, is integrated in the cooling circuit.  (Author abstract)]]></description>
      <pubDate>Fri, 31 May 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/271318</guid>
    </item>
    <item>
      <title>SUBURBAN TRAINS OF CLASS BM/BS 69 REORDERED BY NORWEGIAN STATE RAILWAYS</title>
      <link>https://trid.trb.org/View/218306</link>
      <description><![CDATA[For their local services in the Oslo area, Norwegian State Railways are expanding the present fleet of 49 electric multiple-units (EMUs) by an additional 25 two-car sets. Advances in power and control electronics have led to a Norwegian concept which makes extensive use of the experience gained from developments in Swiss motorcoaches for single-phase ac operation with pulsating current drives. Multiple traction control between all Norwegian EMUs is retained.]]></description>
      <pubDate>Sat, 30 Nov 1985 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/218306</guid>
    </item>
    <item>
      <title>AIR-CONDITIONING AND POWER SUPPLY IN STANDARD DINING CARS OF THE SWISS FEDERAL RAILWAYS</title>
      <link>https://trid.trb.org/View/218307</link>
      <description><![CDATA[Using this air-conditioning system as a basis, it was possible for the first time to achieve partial air-conditioning of the kitchens in the dining cars of the intercity trains.  The new air-conditioning is not only highly economic, but also ensures a high standard of hygiene.  The authors describe the air-conditioning unit and the power supply installed in these vehicles, which were developed by the SBB in collaboration with Swiss coach manufacturers and Brown Boveri.]]></description>
      <pubDate>Sat, 30 Nov 1985 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/218307</guid>
    </item>
    <item>
      <title>SUPER-FLEFNEN, NEWLY DEVELOPED WIRE FOR ELECTRIC CARS</title>
      <link>https://trid.trb.org/View/218308</link>
      <description><![CDATA['Super-Flefnen', newly developed by Sumitomo Electric, is a railway car-wire which is well-balanced, and has superb electrical and physical characteristics.  This report presents the results of characteristics tests conducted on those 30 specification requirements, and those of comparison tests performed with respect to the existing wire product (WL wire) for domestic railways.]]></description>
      <pubDate>Sat, 30 Nov 1985 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/218308</guid>
    </item>
    <item>
      <title>INTRODUCTION OF NEWEST HITACHI CHOPPERS</title>
      <link>https://trid.trb.org/View/204757</link>
      <description><![CDATA[Sixteen years ago the first prototype railway car equipped with a Hitachi high power chopper for railway use was introduced in the 1.5 kv dc system of the Teito Rapid Transit Authority in Tokyo (TRTA).  The basic concept was established at that time and has since been improved with new components and techniques, namely a high voltage, high current reverse conducting thyristor, a gate turn-off (GTO) thyristor, a Freon evaporation cooling system, compound or separate field traction motor control, and various sophisticated control techniques.  As a result, the range of application has expanded.  Two featured systems, a GTO thyristor chopper-controlled shunt motor drive and a 3 kv high power chopper for electric cars, are introduced in this paper.]]></description>
      <pubDate>Tue, 30 Oct 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/204757</guid>
    </item>
    <item>
      <title>LIGHTWEIGHT STAINLESS STEEL COMMUTER TRAIN CARBODIES</title>
      <link>https://trid.trb.org/View/204758</link>
      <description><![CDATA[Lightweight stainless steel commuter train carbodies, which are currently being developed by Hitachi, are designed to reduce car weight to nearly that of aluminum alloy cars in order to save energy and to simplify maintenance by using stainless steel for all structural parts.  These lightweight stainless steel carbodies have been developed for use on 20 m electric commuter train cars.  The weight of the trailer carbody structures, not including the attached equipment, has been reduced to 4.5 tons.  To achieve such lightweight carbody structures, the Hitachi Interactive Design System for Structure Analysis and Strength Evaluation (HIDESS) was used to determine the optimum design base, and high tensile-strength stainless steel, new structural joints, and a long flat-sheet beading technique were incorporated in fabrication.]]></description>
      <pubDate>Tue, 30 Oct 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/204758</guid>
    </item>
    <item>
      <title>SIGNAL PROCESSOR FOR A NONCONTACT SPEED MEASUREMENT SYSTEM</title>
      <link>https://trid.trb.org/View/209524</link>
      <description><![CDATA[The concept and performance of a new digital signal processor for noncontact, high precision speed and distance measurement of rail-guided vehicles are presented.  The measurement procedure is based on the estimation of the time-delay between two signals generated by two optimal sensors located a distance L apart.  Due to surface irregularities these signals are random, but nearly identical except for a time delay corresponding to the velocity of the vehicle.  The high precision and good dynamical properties of the measuring device are achieved by applying a combination of open- and closed-loop correlation techniques and sophisticated digital signal postprocessing algorithms.]]></description>
      <pubDate>Tue, 30 Oct 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/209524</guid>
    </item>
    <item>
      <title>AXLE MOTOR AND INVERTER DRIVEN MU FOR BR</title>
      <link>https://trid.trb.org/View/167331</link>
      <description><![CDATA[This article describes a test vehicle being built by British Railroads to compare traction arrangements and measure electrical noise levels.  The axle motors are evaluated in a multiple unit, which is being especially converted for the purpose.]]></description>
      <pubDate>Fri, 21 May 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/167331</guid>
    </item>
    <item>
      <title>TEN YEARS OF THE BBC DIRECT DC CONVERTOR FOR SHORT-DISTANCE VEHICLES</title>
      <link>https://trid.trb.org/View/92026</link>
      <description><![CDATA[This article describes some of the experience gained from the purposeful use of available technologies, and then describes the present direct dc convertor technology situation, with special emphasis on single-pulse convertor elements as part of the traction equipment for short-distance vehicles.  Studies and tests on the first deliveries resulted in a basis being established for all further activities in this sphere.  The low-loss, stepless convertors led without exception to improved utilization of the vehicles as a result of increased transport speed, while at the same time consuming considerably less energy.]]></description>
      <pubDate>Sat, 15 Aug 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/92026</guid>
    </item>
    <item>
      <title>BUCKLING OF RAILWAY WAGON FRAMES</title>
      <link>https://trid.trb.org/View/161007</link>
      <description><![CDATA[This paper presents the analysis of the three dimensional space frame with arbitrary configuration and loading.  The conventional stiffness method is modified into an iterative technique to take into account the effect of axial force in magnifying the flexural deformations.  The theory predicts the buckling loads of the frame of box-type freight car and 4-wheeler undercarriage frame used by Indian Railways.]]></description>
      <pubDate>Wed, 18 Feb 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/161007</guid>
    </item>
    <item>
      <title>INDUCTION MOTOR PROPULSION SYSTEM FOR TRANSIT CARS</title>
      <link>https://trid.trb.org/View/161013</link>
      <description><![CDATA[The paper describes the inverter-controlled induction motor driving system for transit cars and the results of the running tests.  The system is found to have many merits suitable for electric car drive.]]></description>
      <pubDate>Wed, 18 Feb 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/161013</guid>
    </item>
    <item>
      <title>TRACTION MOTORS -- A COMPARATIVE STUDY OF THE TYPES IN THEIR RESPECTIVE FIELDS OF USE</title>
      <link>https://trid.trb.org/View/153977</link>
      <description><![CDATA[Exhaustive appraisal of the traction characteristics of various designs of traction motors working under various supply and control systems is presented.  It is shown that three-phase developments provide good performance and maintenance advantages and service experience is actively sought on the power electronics aspect of this technology.]]></description>
      <pubDate>Tue, 22 Jul 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/153977</guid>
    </item>
    <item>
      <title>SUBURBAN TRAINSETS CLASS 9000 OF FERROVIA PAULISTA (FEPASA), SAO PAULO, BRAZIL</title>
      <link>https://trid.trb.org/View/92027</link>
      <description><![CDATA[Ferrovia Paulista concluded a contract with a Franco-Brazilian consortium for the delivery of 50 six-coach trainsets for 3000 v with chopper control.  The authors describe the trainsets, paying particular attention to the electrical equipment.]]></description>
      <pubDate>Wed, 15 Aug 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/92027</guid>
    </item>
  </channel>
</rss>