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Backup power system and method

  • US 7,962,772 B2
  • Filed: 02/07/2008
  • Issued: 06/14/2011
  • Est. Priority Date: 02/07/2008
  • Status: Active Grant
First Claim
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1. A backup power system, the system comprising:

  • a secondary power source;

    a stored energy component capable of storing energy therein; and

    a controller in data communication with the secondary power source and the stored energy component,wherein said controller is configured to;

    compare a measured energy level of energy stored within the stored energy component against a first threshold relating to a maximum time necessary for the secondary power source to at least reach a predetermined minimum output level, andcompare the stored energy level to a second threshold greater than the first threshold, said second threshold being selected so as to reduce a number of on/off cycles of the secondary power source during periods of intermittent power fluctuation of the primary power source that are less severe than a prolonged full power loss by the primary power source,said controller being controlled and arranged so as to selectively provide power to an external load from one of a primary power source, the secondary power source, and the stored energy component in response to one or more comparison results.

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