Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Plural – diverse or diversely controlled sources of armature...
Patent
1994-12-12
1997-05-13
Martin, David S.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Plural, diverse or diversely controlled sources of armature...
318 49, 318 55, 318112, H02P 154
Patent
active
056295910
ABSTRACT:
A system for powering a multicurrent locomotive having 2N motors where N is greater than or equal to 2, the system comprising 2N pairs of voltage converters respectively associated with the 2N motors, each motor M.sub.i being powered by means of an inverter connected to the terminals of a parallel capacitor. When the locomotive is powered with AC, then each of the pairs forms a 4-quadrant converter in which the two portions are implemented by the secondary winding of a transformer whose primary winding is connected directly to the terminals of the AC power supply. When the locomotive is powered with DC, the switches serve to use the voltage converters either as voltage-lowering choppers or as voltage-raising choppers. The power supply system is designed in such a manner that in the event of a converter or an inverter failing, it suffices to isolate the failed element to conserve the functions that remain. Availability is thus considerably improved since even in the event of a failure, tractive effort is conserved from at least three motors.
REFERENCES:
patent: 3718846 (1973-02-01), Bejach
patent: 4263535 (1981-04-01), Jones
patent: 4647824 (1987-03-01), Eichenwald
patent: 4780650 (1988-10-01), Miyazaki et al.
patent: 4841202 (1989-06-01), Dishner et al.
G. Wiegner, "GTO-Stromrichter Fur Bahnen", Zev Glasers Annalen, vol. 113, No. 6/7, Jul. 1989, DE pp. 259-272.
GEC Alsthom Transport SA
Martin David S.
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