Power conversion apparatus

Details Power conversion apparatus Power conversion apparatus

2007-07-17

2007-07-17

Vu, Bao Q. (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S098000, C363S056020, C363S132000

Reexamination Certificate

active

11139982

ABSTRACT:
A power conversion apparatus includes serially connected arms U and X, serially connected arms V and Y, serially connected arms W and Z, and a capacitor, the pairs of serially connected arms and the capacitor all connected in parallel to one another. The input-side arms U and X and the output-side arms W and Z are subjected to PWM control so that the arms W and Z are controlled to have a voltage that is lower than that of the arms U and X, thereby providing a step down operation. A step up operation also can be provided by an opposite relation in which the arms W and Z are controlled to have a voltage that is higher than that of the arms U and X, thereby to expand the range within which the output voltage is controlled with the effect of reducing distortion.

REFERENCES:
patent: 6314007 (2001-11-01), Johnson et al.
patent: 6603675 (2003-08-01), Norrga
patent: 6621723 (2003-09-01), Karasawa et al.
patent: 6643157 (2003-11-01), Furukawa et al.
patent: 02-231965 (1990-09-01), None
patent: 08-126352 (1996-05-01), None
patent: 2000-262071 (2000-09-01), None

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