Electrical power system for a self-contained transportable life support system
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United States of America Patent
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May 15, 2001
Grant Date -
N/A
app pub date -
Apr 2, 1999
filing date -
Jun 21, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A switching control circuit for use in an electrical power system for a transportable life support system is disclosed. The switching control circuit provides uninterrupted power to a load of medical and utility devices by switching between one of a set of converted external power voltages and an internal power voltage outputted by a rechargeable internal power source. The power switching is effected within the time interval during which a residual voltage still remains on line due to capacitance discharge of the corresponding power converter and capacitance discharge of the main bus, resulting in uninterrupted electrical power to the load. The switching control circuit comprises: (a) an input power select circuit for outputting a voltage selected from the group of internal and converted external power voltages; (b) a bus switch, which receives the selected voltage, for controlling the application of the selected voltage to the load; and (c) a main bus for transporting the selected voltage to the load of medical and utility devices.
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