Three phase rectifier circuit with virtual neutral

Details Three phase rectifier circuit with virtual neutral Three phase rectifier circuit with virtual neutral

2005-12-20

2005-12-20

Laxton, Gary L (Department: 2838)

Electrical transmission or interconnection systems

Plural load circuit systems

Plural sources of supply

Reexamination Certificate

active

06977445

ABSTRACT:
A rectifier circuit powers three power conversion modules using a three phase AC input without a neutral connection. The rectifier circuit includes a first bridge rectifier that is connected to a first phase of the three phase AC input and that produces a first rectified waveform. A second bridge rectifier is connected to a second phase of the three phase AC input and produces a second rectified waveform. A third bridge rectifier is connected to a third phase of the three phase AC input and produces a third rectified waveform. A first inductor has one end that is connected to the first bridge rectifier. A second inductor has one end that is connected to the second bridge rectifier. A third inductor has one end that is connected to the third bridge rectifier. Opposite ends of the first, second and third inductors are connected to form a virtual neutral. A protection circuit prevents overvoltage when one of the DC outputs is shorted.

REFERENCES:
patent: 4023071 (1977-05-01), Fussell
patent: 5124904 (1992-06-01), Paice
patent: 5406470 (1995-04-01), Ridley et al.
patent: 5984173 (1999-11-01), Edwards
patent: 6473284 (2002-10-01), Ilic et al.
patent: 6501192 (2002-12-01), Lubomirsky
patent: 6650523 (2003-11-01), Kleemeier et al.

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