Three phase rectifier circuit with virtual neutral

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

2007-01-02

2007-01-02

Laxton, Gary L (Department: 2838)

Electrical transmission or interconnection systems

Plural load circuit systems

Plural sources of supply

C323S909000, C361S091100

Reexamination Certificate

active

11163907

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:
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patent: 6501192 (2002-12-01), Lubomirsky
patent: 6650523 (2003-11-01), Kleemeier et al.
patent: 6977445 (2005-12-01), Lubomirsky

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