Electric power converter apparatus for an a.c. electric rolling

Details Electric power converter apparatus for an a.c. electric rolling Electric power converter apparatus for an a.c. electric rolling

1979-05-23

1981-01-13

Shoop, William M.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 44, 363128, H02M 719, H02P 1316

Patent

active

042452910

ABSTRACT:
A power converter apparatus for an a.c. electric rolling stock comprising two transformers, each including a primary winding and a plurality of secondary windings generating the same output voltages but having different internal reactances; a pair of phase-controlled bridge rectifier circuits, each being connected to one secondary winding of each transformer; and diode bridge rectifier circuits connected to the other secondary windings, wherein the windings connected to the pair of phase-controlled bridge rectifier circuits have different internal reactances, and the phase-controlled bridge rectifier circuits are simultaneously controlled, and when the maximum output voltages from the phase-controlled bridge rectifier circuits are reached, the output voltages from the diode bridge rectifier circuits (non-phase-controlled) are increased to their maximum values, then the output voltages from the phase-controlled bridge rectifier circuits are decreased to their minimum values.

REFERENCES:
patent: 3419786 (1968-12-01), Brane
patent: 3909697 (1975-09-01), Depenbrock
patent: 4020411 (1977-04-01), Tsuboi et al.
patent: 4030018 (1977-06-01), Tsuboi
patent: 4045722 (1977-08-01), Tachibana
patent: 4122515 (1978-10-01), Tachibana et al.

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