Voltage lowering device and asynchronous traction system supplie

Details Voltage lowering device and asynchronous traction system supplie Voltage lowering device and asynchronous traction system supplie

1996-07-17

1997-11-11

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 68, H02M 7217

Patent

active

056870710

ABSTRACT:
A voltage lowering device includes at least one pair of forced commutation single-phase rectifiers connected to secondary windings of a main traction transformer. The power drawn from a direct current mains power supply passes through the main traction transformer and is recovered at a secondary winding by means of a forced commutation single-phase rectifier operating as a voltage increasing controlled rectifier. The other forced commutation single-phase rectifiers operate as synchronous voltage inverters. An asynchronous traction system supplied by a single-phase mains power supply includes a voltage lowering device as previously described.

REFERENCES:
patent: 4030018 (1977-06-01), Tsuboi
patent: 4323962 (1982-04-01), Steigerwald
patent: 5027264 (1991-06-01), DeDoncker et al.
Hirofumi Matsuo et al, "An Improved 210KVA Auxiliary Power Supply System of the Electric Railway Rolling Stock by Using a New Two Phase Buck-Boost Type DC-DC Converter", Proceedings of the Annual Power Electronics Specialists Conference, Taiwan, Jun. 20-24, 1994, vol. 1, 20 Jun. 1994, pp. 709-713.
Kheraluwala, M.H., "Performance Characterization of a High-Power Dual Active Bridge DC-to-DC Converter", IEEE Transactions on Industry Applications, vol. 28, No. 6, 1 Nov. 1992, pp. 1294-1301.

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