Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1993-04-12
1999-02-23
Elms, Richard T.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
H02J 700
Patent
active
058747885
ABSTRACT:
An external DC (direct current) power supply is provided for supplying backup DC power to a supported device having an AC input connector. The power supply includes an AC (alternating current) voltage source. A voltage rectifier is coupled to the AC voltage source for rectifying the AC voltage source. An energy storage device coupled in parallel to the voltage rectifier provides a predetermined DC voltage threshold level. A connector of the external DC power supply applies a power output of the parallel combination of the voltage rectifier and the energy storage device to the AC input connector of the supported device. The external DC power supply is capable of reliably, effectively and efficiently supplying backup power to the AC power input of a supported system without requiring any special wiring or modification of the supported system using only the AC input plug for connection to the supported system.
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Elms Richard T.
Oneac Corporation
Pennington Joan
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