Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668069
E. Nipp, E. Norberg
Today inverter-fed permanent magnet (PM) synchronous motors may be considered as an alternative to squirrel cage induction motors. Higher efficiency and compactness can be achieved combined with lower inverter rating for the same output power. In this paper, two methods are considered to increase the available speed range. They are field-weakening and switched stator windings. It is evaluated how switched windings can be implemented and what influence they have on the motor design. As possible switch solutions, contactors and thyristors are examined. The resulting jerk is investigated experimentally and can be diminished sufficiently.
{"title":"On the feasibility of switched stator windings in permanent magnet motors for traction drives","authors":"E. Nipp, E. Norberg","doi":"10.1109/RRCON.1998.668069","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668069","url":null,"abstract":"Today inverter-fed permanent magnet (PM) synchronous motors may be considered as an alternative to squirrel cage induction motors. Higher efficiency and compactness can be achieved combined with lower inverter rating for the same output power. In this paper, two methods are considered to increase the available speed range. They are field-weakening and switched stator windings. It is evaluated how switched windings can be implemented and what influence they have on the motor design. As possible switch solutions, contactors and thyristors are examined. The resulting jerk is investigated experimentally and can be diminished sufficiently.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"425 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115944640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668067
A. Gorlov
This paper proposes a mechanical system against car-bomb attack for the protection of unguarded railroad crossings. In 1982, a suicide car-bomb attack destroyed the Marine Barracks in Beirut, Lebanon, killing 240 people. Similar suicide attacks continued in the following years and triggered the present research to counteract them. The result was the invention of the turnstile barrier described in this paper. The turnstile barrier was developed and thoroughly tested in 1987-1989, to protect important buildings and other installations against possible car-bomb attack by speeding vehicles carrying highly explosive materials. In 1995 the turnstile was certified by the US Department of State as a reliable barrier against such attacks and was placed on the DOS list of certified equipment, which is available for use by architects and planners. The turnstile barrier can easily be adapted to be used as an efficient and low cost device to prevent collisions between cars and trains at unguarded railroad crossings. The same basic system is used to deflect moving vehicles that fail to stop before a railroad crossing when trains approach.
{"title":"Turnstile barriers for protection of unguarded railroad crossings","authors":"A. Gorlov","doi":"10.1109/RRCON.1998.668067","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668067","url":null,"abstract":"This paper proposes a mechanical system against car-bomb attack for the protection of unguarded railroad crossings. In 1982, a suicide car-bomb attack destroyed the Marine Barracks in Beirut, Lebanon, killing 240 people. Similar suicide attacks continued in the following years and triggered the present research to counteract them. The result was the invention of the turnstile barrier described in this paper. The turnstile barrier was developed and thoroughly tested in 1987-1989, to protect important buildings and other installations against possible car-bomb attack by speeding vehicles carrying highly explosive materials. In 1995 the turnstile was certified by the US Department of State as a reliable barrier against such attacks and was placed on the DOS list of certified equipment, which is available for use by architects and planners. The turnstile barrier can easily be adapted to be used as an efficient and low cost device to prevent collisions between cars and trains at unguarded railroad crossings. The same basic system is used to deflect moving vehicles that fail to stop before a railroad crossing when trains approach.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131172823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668106
K. Mooney, N. Ghaly
This paper highlights some of the key characteristics of communications based train control (CBTC) functionality which lead to its selection as the most appropriate train control technology for New York City Transit (NYCT) to employ in its long range signal modernization program. The paper also describes the procurement methodology being pursued to develop a system supported by two or more suppliers. In 1996, NYCT retained a consultant Advanced Technology Systems Group (ATSG) to supplement its own technical expertise, particularly in the area of advanced train control technology, during the design and construction of the pilot project. During the design NYCT has continued to exchange information with other transit properties and train control industry suppliers. This paper highlights some key technical decisions. The topics addressed are the selection of single rail power frequency track circuits and 2.4 Gigahertz spread spectrum radio frequency train/wayside communications and coordination with the R-143 new car procurement. A pilot project on the Canarsie Line was advertised on October 31, 1997 as a three phase negotiated procurement. The paper concludes with a current status of the Canarsie Pilot Project.
{"title":"Communications based train control at MTA New York City Transit. Program background and update","authors":"K. Mooney, N. Ghaly","doi":"10.1109/RRCON.1998.668106","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668106","url":null,"abstract":"This paper highlights some of the key characteristics of communications based train control (CBTC) functionality which lead to its selection as the most appropriate train control technology for New York City Transit (NYCT) to employ in its long range signal modernization program. The paper also describes the procurement methodology being pursued to develop a system supported by two or more suppliers. In 1996, NYCT retained a consultant Advanced Technology Systems Group (ATSG) to supplement its own technical expertise, particularly in the area of advanced train control technology, during the design and construction of the pilot project. During the design NYCT has continued to exchange information with other transit properties and train control industry suppliers. This paper highlights some key technical decisions. The topics addressed are the selection of single rail power frequency track circuits and 2.4 Gigahertz spread spectrum radio frequency train/wayside communications and coordination with the R-143 new car procurement. A pilot project on the Canarsie Line was advertised on October 31, 1997 as a three phase negotiated procurement. The paper concludes with a current status of the Canarsie Pilot Project.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115207114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668079
D. Hackenberger, C. Lonsdale
A cooperative research effort between a major US railroad and a firm specializing in nondestructive testing equipment was conducted to determine the feasibility of finding cracks in the rim of steel railroad wheels. Wheel service failures, failure data and past efforts to find defective wheels are discussed as background information. The study found that defects machined into an actual railroad wheel rim at the tread are easily found in a laboratory setting using ultrasonic immersion bubbler probes. It was found that shear waves give better detection sensitivity than do longitudinal waves. An outline of future work plans, with a final goal of a shop and/or wayside cracked wheel detection system, is described.
{"title":"An initial feasibility study to develop a wayside cracked railroad wheel detector","authors":"D. Hackenberger, C. Lonsdale","doi":"10.1109/RRCON.1998.668079","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668079","url":null,"abstract":"A cooperative research effort between a major US railroad and a firm specializing in nondestructive testing equipment was conducted to determine the feasibility of finding cracks in the rim of steel railroad wheels. Wheel service failures, failure data and past efforts to find defective wheels are discussed as background information. The study found that defects machined into an actual railroad wheel rim at the tread are easily found in a laboratory setting using ultrasonic immersion bubbler probes. It was found that shear waves give better detection sensitivity than do longitudinal waves. An outline of future work plans, with a final goal of a shop and/or wayside cracked wheel detection system, is described.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124991503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668109
V.F. Grappone, G. Hubbs
In June, 1997, MTA Long Island Rail Road (LIRR) completed its Signal Strategy, which is a 16 year, $700 Million plan to improve both the condition of its signaling and its suitability to supporting service demands. It addresses both short- and long-term issues regarding safety, reliability, cost, functionality and performance. In the long-term, the plan is heavily dependent on communication-based train control (CBTC) because of its potential benefits. Given the resultant need for the LIRR to assume an aggressive role in promoting the development of CBTC, and the MTA New York City Transit (NYCT) concurrent initiative to install it on its Canarsie Line, a joint effort was conceived to secure benefits for both MTA agencies through synergy and averting the duplication of effort. A fundamental characteristic of CBTC is its inherent capability for exchange of critical data between trains and the wayside. This characteristic will make possible expanded functionality that has not been possible previously. The preferred technical communication medium is spread spectrum radio due to its robustness, capacity and suitability to physical conditions such as site availability.
{"title":"The Long Island Rail Road Signal Strategy and its joint effort with New York City Transit on communication-based train control","authors":"V.F. Grappone, G. Hubbs","doi":"10.1109/RRCON.1998.668109","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668109","url":null,"abstract":"In June, 1997, MTA Long Island Rail Road (LIRR) completed its Signal Strategy, which is a 16 year, $700 Million plan to improve both the condition of its signaling and its suitability to supporting service demands. It addresses both short- and long-term issues regarding safety, reliability, cost, functionality and performance. In the long-term, the plan is heavily dependent on communication-based train control (CBTC) because of its potential benefits. Given the resultant need for the LIRR to assume an aggressive role in promoting the development of CBTC, and the MTA New York City Transit (NYCT) concurrent initiative to install it on its Canarsie Line, a joint effort was conceived to secure benefits for both MTA agencies through synergy and averting the duplication of effort. A fundamental characteristic of CBTC is its inherent capability for exchange of critical data between trains and the wayside. This characteristic will make possible expanded functionality that has not been possible previously. The preferred technical communication medium is spread spectrum radio due to its robustness, capacity and suitability to physical conditions such as site availability.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121595311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668103
S. P. Gordon, D. Lehrer
The Bay Area Rapid Transit (BART) system, USA, in collaboration with Hughes Aircraft Company and Harmon Industries, is in the process of developing an advanced automatic train control (AATC) system to replace the current fixed-block automatic system. In the long run, the AATC system is expected to not only allow for safe short headway operation, but also to facilitate coordinated train control and energy management. This new system will employ spread spectrum radios, installed on-board trains, at wayside locations and at control stations, to determine train locations and reliably transfer control information. Sandia National Laboratories has worked cooperatively with BART to develop a simulator of the train control and power consumption of the AATC system. They are now in the process of developing enhanced train control algorithms to supplement the safety critical controller in order to smooth out train trajectories through coordinated control of multiple trains, and to reduce energy consumption and power infrastructure requirements. The control algorithms so far considered include: (1) reducing peak power consumption to avoid voltage sags, especially during an outage or while clearing a backup; (2) rapid and smooth recovery from a backup; (3) avoiding oscillations due to train interference; (4) limiting needle peaks in power demand at substations to some specified level; (5) coasting; and (6) coordinating train movement, e.g. starts/stops and hills.
{"title":"Coordinated train control and energy management control strategies","authors":"S. P. Gordon, D. Lehrer","doi":"10.1109/RRCON.1998.668103","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668103","url":null,"abstract":"The Bay Area Rapid Transit (BART) system, USA, in collaboration with Hughes Aircraft Company and Harmon Industries, is in the process of developing an advanced automatic train control (AATC) system to replace the current fixed-block automatic system. In the long run, the AATC system is expected to not only allow for safe short headway operation, but also to facilitate coordinated train control and energy management. This new system will employ spread spectrum radios, installed on-board trains, at wayside locations and at control stations, to determine train locations and reliably transfer control information. Sandia National Laboratories has worked cooperatively with BART to develop a simulator of the train control and power consumption of the AATC system. They are now in the process of developing enhanced train control algorithms to supplement the safety critical controller in order to smooth out train trajectories through coordinated control of multiple trains, and to reduce energy consumption and power infrastructure requirements. The control algorithms so far considered include: (1) reducing peak power consumption to avoid voltage sags, especially during an outage or while clearing a backup; (2) rapid and smooth recovery from a backup; (3) avoiding oscillations due to train interference; (4) limiting needle peaks in power demand at substations to some specified level; (5) coasting; and (6) coordinating train movement, e.g. starts/stops and hills.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130758050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668098
W. Sneed, R.L. Smith
For several years, the Association of American Railroads (AAR) has been developing new techniques to detect defective roller bearings as part of their new generation wayside acoustic detector program. This paper reviews thermal and vibration data collected from on-board a test train used to simulate railroad revenue service conditions during the test program. The train tests were carried out by Transportation Technology Center now known as Transportation Technology Center, Inc. (TTCI), a subsidiary of the AAR, at the Transportation Technology Center (TTC), Pueblo, Colorado in November 1996. Of all the bearing defect types to be detected, one of the most challenging is that of a bearing with a loose inner raceway commonly referred to as a spun cone. Normal roller bearings have "press fit" inner raceways that keep them from rotating or sliding about the axle. However, the spun cone bearing has lost its tight press fit and can slowly rotate about the axle journal axis. The spun cone bearing defect is suspected to be the cause of many of today's confirmed hot bearing setouts. This paper compares both thermal and vibration data from bearings with no internal defects to those with spun cones, broken rollers and water etched surfaces.
{"title":"On-board real-time railroad bearing defect detection and monitoring","authors":"W. Sneed, R.L. Smith","doi":"10.1109/RRCON.1998.668098","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668098","url":null,"abstract":"For several years, the Association of American Railroads (AAR) has been developing new techniques to detect defective roller bearings as part of their new generation wayside acoustic detector program. This paper reviews thermal and vibration data collected from on-board a test train used to simulate railroad revenue service conditions during the test program. The train tests were carried out by Transportation Technology Center now known as Transportation Technology Center, Inc. (TTCI), a subsidiary of the AAR, at the Transportation Technology Center (TTC), Pueblo, Colorado in November 1996. Of all the bearing defect types to be detected, one of the most challenging is that of a bearing with a loose inner raceway commonly referred to as a spun cone. Normal roller bearings have \"press fit\" inner raceways that keep them from rotating or sliding about the axle. However, the spun cone bearing has lost its tight press fit and can slowly rotate about the axle journal axis. The spun cone bearing defect is suspected to be the cause of many of today's confirmed hot bearing setouts. This paper compares both thermal and vibration data from bearings with no internal defects to those with spun cones, broken rollers and water etched surfaces.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127218959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668093
P. G. Steets, Y. H. Tse
Wayside detector devices, over the years, have proven to be valuable assets to a railroad in enhancing safety and improving efficiencies. Currently, devices such as hot box detectors, dragging equipment detectors, high car detectors, wheel impact detectors have routinely prevented accidents or damages from occurring. With the advent of electronics in terms of its sophistication, capability, cost and miniaturization, a lot of interest arose to wayside devices to further improve efficiencies and reduce manual inspection requirements of freight car components. The integration of these devices between each other and their integration into the railroad maintenance system increase the potential for efficiency gains. At this juncture, Conrail has re-examined the usage of electronics and has advanced the use of technology in fault detection of freight car components. This paper gives an account of freight car failure detection devices which are currently available in service and which are being developed in 1998. Conrail's integration of some of the devices and the automation of reporting the faults and rerouting of defective cars is also presented.
{"title":"Conrail's integrated automated wayside inspection","authors":"P. G. Steets, Y. H. Tse","doi":"10.1109/RRCON.1998.668093","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668093","url":null,"abstract":"Wayside detector devices, over the years, have proven to be valuable assets to a railroad in enhancing safety and improving efficiencies. Currently, devices such as hot box detectors, dragging equipment detectors, high car detectors, wheel impact detectors have routinely prevented accidents or damages from occurring. With the advent of electronics in terms of its sophistication, capability, cost and miniaturization, a lot of interest arose to wayside devices to further improve efficiencies and reduce manual inspection requirements of freight car components. The integration of these devices between each other and their integration into the railroad maintenance system increase the potential for efficiency gains. At this juncture, Conrail has re-examined the usage of electronics and has advanced the use of technology in fault detection of freight car components. This paper gives an account of freight car failure detection devices which are currently available in service and which are being developed in 1998. Conrail's integration of some of the devices and the automation of reporting the faults and rerouting of defective cars is also presented.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"04 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129677014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668095
L. Myers, M. Lovette, C. Kilgus, J.A. Giannini, D. C. Swanson, K. Reichard, M. Mahon, D. Mast
The advent of Java-based information systems is causing a new network system structure to replace the custom designed client/server architecture traditionally used at ARL/PSU for wayside sensing and control. Java applets provide the man-machine interface allowing access and control of the wayside system from multiple locations over a dedicated intranet or dial-up modems. The only user software required is a Web browser with Java providing the graphical user interface. ARL/PSU is implementing a Java-based information system in an experimental wayside rock slide detection system. To determine the location of the rock slide relative to the tracks, the sensor array provides both direction finding and range estimation. A digital signal processing board in the computer at the sensor site (wayside server) records the sensor data and performs the function of impact detection and localization. The wayside server provides a Java-based graphical display of system information on a remote PC monitor via a telephone modem.
{"title":"A Java-based information system for wayside sensing and control","authors":"L. Myers, M. Lovette, C. Kilgus, J.A. Giannini, D. C. Swanson, K. Reichard, M. Mahon, D. Mast","doi":"10.1109/RRCON.1998.668095","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668095","url":null,"abstract":"The advent of Java-based information systems is causing a new network system structure to replace the custom designed client/server architecture traditionally used at ARL/PSU for wayside sensing and control. Java applets provide the man-machine interface allowing access and control of the wayside system from multiple locations over a dedicated intranet or dial-up modems. The only user software required is a Web browser with Java providing the graphical user interface. ARL/PSU is implementing a Java-based information system in an experimental wayside rock slide detection system. To determine the location of the rock slide relative to the tracks, the sensor array provides both direction finding and range estimation. A digital signal processing board in the computer at the sensor site (wayside server) records the sensor data and performs the function of impact detection and localization. The wayside server provides a Java-based graphical display of system information on a remote PC monitor via a telephone modem.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128955721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-15DOI: 10.1109/RRCON.1998.668072
G. Joós, R. Kapila, R. Friem
Concerns about electromagnetic interference (EMI) issues are gaining more importance in the specification of propulsion equipment for light rail vehicles, as the number and complexity of switching power converters increases. EMI may adversely affect the operation of the signalling systems and the safety of the vehicle. This paper examines requirements associated with EMI and identifies the possible sources of EMI. It describes the on-board equipment and fixed installations responsible for EMI generation. Mitigation techniques are discussed.
{"title":"Electromagnetic interference issues in the specification of AC and DC propulsion systems for light rail vehicles","authors":"G. Joós, R. Kapila, R. Friem","doi":"10.1109/RRCON.1998.668072","DOIUrl":"https://doi.org/10.1109/RRCON.1998.668072","url":null,"abstract":"Concerns about electromagnetic interference (EMI) issues are gaining more importance in the specification of propulsion equipment for light rail vehicles, as the number and complexity of switching power converters increases. EMI may adversely affect the operation of the signalling systems and the safety of the vehicle. This paper examines requirements associated with EMI and identifies the possible sources of EMI. It describes the on-board equipment and fixed installations responsible for EMI generation. Mitigation techniques are discussed.","PeriodicalId":257470,"journal":{"name":"Proceedings of the 1998 ASME/IEEE Joint Railroad Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128759746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}