Method and apparatus for power converting AC into DC or DC into

Details Method and apparatus for power converting AC into DC or DC into Method and apparatus for power converting AC into DC or DC into

1997-02-12

1999-04-06

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 87, H02M 7217

Patent

active

058926747

ABSTRACT:
In a power converter apparatus having a three-phase AC power supply connecting unit, a positive side capacitor, a negative side capacitor, first-phase and third-phase converting circuits each including switching elements connected in series, and a common phase for connecting a neutral polarity to a second phase, there are provided a common phase converting circuit including two switching elements connected in series between positive and negative polarities, a change detector for detecting a temporal change of an electric current flowing through the common phase, and a duty controller for changing the on-off duty of the switching elements in the common phase converting circuit on the basis of the temporal change.

REFERENCES:
patent: 4816985 (1989-03-01), Tanahashi
patent: 4984147 (1991-01-01), Araki
patent: 5140514 (1992-08-01), Tuusa et al.
patent: 5255175 (1993-10-01), Uchino
patent: 5483435 (1996-01-01), Uchino
patent: 5504667 (1996-04-01), Tanaka et al.

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