Uninterruptible power supply with passing neutral, comprising a

Details Uninterruptible power supply with passing neutral, comprising a Uninterruptible power supply with passing neutral, comprising a

1994-11-21

1997-08-05

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 64, 323280, 363 34, 363123, 363124, 363 37, 363 21, 363137, 363 54, 363 86, H02J 700

Patent

active

056545916

ABSTRACT:
An uninterruptible power supply, with passing neutral, comprises a twin step-up chopper whose input is connected to a battery and to a rectifier circuit connected to the mains power system. The twin step-up chopper comprises a positive step-up chopper supplying a first output voltage between a positive DC output and neutral, and a negative step-up chopper supplying a second output voltage between a negative DC output and neutral. The control circuit of the twin step-up chopper comprises means for regulating imbalance between the output voltages of the positive and negative step-up choppers, suitable both for operation on the mains power system and for operation on the battery.

REFERENCES:
patent: 4719559 (1988-01-01), Sokai et al.
patent: 4823247 (1989-04-01), Tamoto
patent: 5126585 (1992-06-01), Boys
patent: 5218522 (1993-06-01), Phelps et al.

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