UPS overload time remaining calculation based on an adaptive minimum envelope filter

A method comprising:

• receiving a load percentage of an uninterruptible power supply (UPS);
• monitoring the load percentage of the UPS to determine whether the UPS is operating in a nominal load state or an overload state based on the load percentage;
• generating an input overload countdown timer when the UPS is operating in the overload state, the input overload countdown timer providing an estimated time remaining in the overload state based on the load percentage;
• generating an output overload countdown timer by applying an envelope filter to the input overload countdown timer by, for each selected interval in a series of intervals:
• receiving a count reset threshold for the selected interval;
• when a counter is less than or equal to the count reset threshold, outputting a selected value of the input overload countdown timer within the selected interval as a value of the output overload countdown timer, wherein the selected value is a minimum value or a maximum value of the input overload countdown timer within the selected interval;
• and
• when the counter is greater than the count reset threshold, outputting the selected value of the input overload countdown timer and reset the counter for a subsequent interval of the series of intervals;
• and
• directing a display device to display the output overload countdown timer.

A system comprising:

• an uninterruptible power supply (UPS);
• a display device;
• measurement circuitry configured to determine a battery capacity of the UPS;
• and
• a controller configured to:
• receive the battery capacity of the UPS from the measurement circuitry;
• generate an input countdown timer, the input countdown timer providing an estimated battery time remaining based on the battery capacity;
• generate an output countdown timer by applying an envelope filter to the input countdown timer by, for each selected interval in a series of intervals:
• receive a count reset threshold for the selected interval;
• and
• when a counter is less than or equal to the count reset threshold, output a selected value of the input countdown timer within the selected interval as a value of the output countdown timer, wherein the selected value a minimum value or a maximum value of the input countdown timer within the selected interval;
• and
• when the counter is greater than the count reset threshold, output the selected value of the input countdown timer and reset the counter for a subsequent interval of the series of intervals;
• and
• at least one of direct the display device to display the output countdown timer or control one or more additional components based on the output countdown timer.