NEWLY DEVELOPED THYRISTOR CHOPPER EQUIPMENT FOR ELECTRIC RAILCARS
In the chopper control system for railcars, it is effective to adopt high operation frequency of the chopper for achievement of the following: 1) decrease of higher harmonic current induced in the trolley wire, 2) reduction of weight for reactors and capacitors in the traction circuit, and 3) improvement of control response. Through development of reverse-conducting thyristors with very short turn-off time and a repulsion type two-phase chopper, we finally realized production of a new standard high-frequency chopper equipment with regenerative braking for 1500-V dc railcars. Technical achievements mentioned previously were completely realized as a result of adoption of high frequency, 660 Hz, in the equipment. The newly developed standard high-frequency chopper equipment for 30 cars were delivered to the Chiyoda Line of Teito Rapid Transit Authority in Tokyo, and they have been operated satisfactorily in revenue service since March 1971. This paper also describes: 1) the chopper circuit using fast-switching reverse-conducting thyristors and series saturable reactors, 2) analysis of commutation circuit and methods of suppressing reapplied forward voltage increasing rate (dv/dt) and shortening commutation period, 3) the composition of the traction circuit including the protection system, such as protection for overvoltage at the regenerative braking, and 4) test results on the Chiyoda Line of Teito Rapid Transit Authority.
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Corporate Authors:
Institute of Electrical and Electronics Engineers (IEEE)
3 Park Avenue, 17th Floor
New York, NY United States 10016-5997 -
Authors:
- Tsuboi, T
- IZAWA, S
- Wajima, K
- Ogawa, T
- Katta, T
- Publication Date: 1973-5
Media Info
- Pagination: p. 294-301
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Serial:
- IEEE Transactions on Industry Applications
- Volume: 1A-9
- Issue Number: 3
- Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Subject/Index Terms
- TRT Terms: Multiple unit trains; Railroad electrification; Rapid transit; Thyristors
- Old TRIS Terms: Thyristor control
- Subject Areas: Public Transportation; Railroads; Vehicles and Equipment;
Filing Info
- Accession Number: 00046390
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 18 1981 12:00AM