Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1998-04-30
2000-05-02
Gaffin, Jeffrey
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 80, 307 85, H02J 700
Patent
active
06057609&
ABSTRACT:
The AC electric power of the commercial AC power supply is safely supplied to an electronic appliance functioning as a load during an occurrence of a power interruption by an auxiliary power supply apparatus. In the auxiliary power supply apparatus, normally usable electric power derived from a diode bridge energized by the commercial AC power supply, and auxiliary electric power produced from a DC/DC converter energized by a cell are selectively conducted to an output connector of this auxiliary power supply apparatus via a selection switch and a load connection switch, which are controlled in response to a detection result of a power-interrupt detecting circuit. When an AC plug of a load set is inserted into this output connector, a switch is turned ON, and then, a DC voltage applied from a voltage divider to this connector is changed, depending upon the types of the power supply circuits employed in the load sets, namely, a transformer type power supply circuit and a switching type power supply circuit. This voltage change is detected by a voltage/gradient detecting circuit, so that the load connection switch is turned ON only for the switching type load set. A modem apparatus and the like may be continuously operated.
REFERENCES:
patent: 5324990 (1994-06-01), Cunningham
patent: 5565714 (1996-10-01), Cunningham
patent: 5567996 (1996-10-01), Yu
patent: 5583384 (1996-12-01), Henry
patent: 5642002 (1997-06-01), Mekanik et al.
Iwase Sumio
Nagai Tamiji
Yamazaki Kazuo
Gaffin Jeffrey
Kaplan Jonathan
Majoli Jay H.
Sony Corporation
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