HVAC/R system with multiple power sources and time-based selection logic
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United States of America Patent
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Jan 5, 2016
Grant Date -
Jul 26, 2012
app pub date -
Jan 24, 2011
filing date -
Jan 24, 2011
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Abstract
A heating, ventilation, air conditioning, and refrigeration system includes one or more variable frequency drives (VFD) controlled by one or more VFD controllers, which are configured to provide three-phase power to one or more three-phase AC motors and single-phase power to one or more single-phase AC motors. The system also includes a power source controller configured to select from a plurality of power sources based on availability of one or more power sources and time so as to maximize the economic efficiency of operating the system.
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