Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1999-02-04
2000-12-19
Jackson, Stephen W.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
H02J 700, H02J 900
Patent
active
06163087&
ABSTRACT:
A power supplying system includes a switching control circuit connected to a stand-by power source so as to receive electrical power therefrom. The switching control circuit is further connected to a power-supplying unit and is activated to control operation of the power-supplying unit in a selected one of an ON state, where the power-supplying unit supplies electrical power for operating a heat-dissipating fan, and an OFF state, where the power-supplying unit ceases to supply the electrical power to the heat-dissipating fan. A delayed closing device receives a power-OFF signal from the power-supplying unit at an instant the power-supplying unit is operated from the ON state to the OFF state, and connects the heat-dissipating fan to the stand-by power source upon receiving the power-OFF signal to enable the heat-dissipating fan to receive electrical power from the stand-by power source and permit continued operation of the heat-dissipating fan even after the heat-dissipating fan ceases to receive the electrical power from the power-supplying unit.
REFERENCES:
patent: 4756473 (1988-07-01), Takemae et al.
patent: 5640059 (1997-06-01), Kammiller et al.
patent: 5969436 (1999-10-01), Chalasani et al.
Huang Yung-Hsin
Liao Chien-Hua
Henry Andre
Jackson Stephen W.
Shin Jiuh Corp.
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