Uninterruptible power supply

Details Uninterruptible power supply Uninterruptible power supply

1985-05-20

1987-02-10

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 46, 307 48, 363 37, H02M 545, H02J 734

Patent

active

046424750

ABSTRACT:
The invention pertains to an uninterruptible power supply (UPS) with a rectifier supplied with power by a power network, connected to an intermediate circuit having a battery as well as to an inverter connected to the intermediate circuit for supplying an interruption protected power source. The control for the main input rectifier and the inverter is supplied using two secondary rectifiers, whose outpus are connected in parallel through decoupling diodes. The first secondary rectifier which supplies power to the control unit in normal operation, is connected to the input power network. In order to ensure power supply to the control unit in the event of a power failure in a simple fashion, even if the voltage of the protected output drops, one input of the second secondary rectifier is connected to an electrical midpoint of an intermediate circuit which is formed by two capacitors bridging the intermediate circuit and the return connection of the second secondary rectifier is connected to the main connection of two serially connected static converter devices of the inverter.

REFERENCES:
patent: 1669527 (1928-05-01), Meyer
patent: 1970329 (1934-08-01), Marrison
patent: 3249769 (1966-05-01), Mierendorf

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