Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1996-12-23
1998-09-15
Wong, Peter S.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 37, 363 70, 363126, 363127, H02M 112
Patent
active
058088822
ABSTRACT:
A three-phase bridge rectifier includes three bidirectional switching circuits each including a single-phase rectifier circuit having four single-phase bridge-connected diodes and a semiconductor switching element connected between DC output terminals of the single-phase rectifier circuit, three AC side reactors each connected between one of two AC input terminals of each bidirectional switching circuit and each one of output terminals of a three-phase AC power supply, three positive side diodes each having an anode connected to a positive side DC output terminal of each one of the bidirectional switching circuits and a cathode connected to a positive side DC bus, three negative side diodes each having a cathode connected to a negative side DC output terminal of each one of the bidirectional switching circuits and an anode connected to a negative side DC bus, a smoothing capacitor including two capacitors series connected between the positive and negative side DC buses and a neutral terminal connected to the other AC input terminal of each bidirectional switching circuit, and a control circuit for controlling the semiconductor switching elements of the respective bidirectional switching circuits.
REFERENCES:
patent: 3927362 (1975-12-01), Brewster
patent: 5633790 (1997-05-01), Gritter et al.
IEE Japan Transaction vol. 112-D, No. 5, May 1992, p. 497; K. Oguchi et al.; May 20, 1992.
Kabushiki Kaisha Toshiba
Riley Shawn
Wong Peter S.
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