Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1986-04-18
1987-10-13
Salce, Patrick R.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
363 84, 363125, 323207, 323211, H02M 7155
Patent
active
047002832
ABSTRACT:
An electric locomotive has two AC-DC converters which are connected in cascade, and a power factor controller is connected to one of the converters. Two automatic pulse phase shifters are provided for the two converters and controlled by a signal responding to a difference signal between a current flowing in the converters and a reference signal. One of the input signals of the automatic pulse phase shifter is regulated by a bias signal. The output from each of the automatic pulse phase shifters to each of the converters is switched when the measured speed of the locomotive exceeds a predetermined reference speed signal.
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Imai Hayato
Kimura Akira
Miura Shozuchi
Nakamura Kiyoshi
Tamura Kaoru
Hitachi , Ltd.
Salce Patrick R.
Todd Voeltz Emanuel
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