METHOD OF CONTROLLING AN UNINTERRUPTIBLE POWER SUPPLY SYSTEM TO OPTIMIZE COMPONENT LIFE

• US 20160294211A1
• Filed: 03/30/2015
• Published: 10/06/2016
• Est. Priority Date: 03/30/2015
• Status: Active Grant

• Current Assignee: Vetriv S.R.L.
• Original Assignee: Chloride SRL (Emerson Electric Company)
• Inventors: TRICARICO, MATTEO, GUIDOTTI, ENRICO, COSTA, PIER UGO, PETTEN, ANDREA
• Granted Patent: US 10,305,320 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 9/00 Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: H02J 9/062 for AC powered loads

Abstract

A method of controlling an uninterruptible power supply system to increase component life includes decreasing a maximum output power limit of the uninterruptible power supply system when a temperature that the uninterruptible power supply system is experiencing has increased and increasing the maximum output power limit when this temperature has decreased. In an aspect, this temperature is ambient temperature of an equipment enclosure of the uninterruptible power supply system in which at least a rectifier and inverter of the uninterruptible power supply system are located. In an aspect, the method further includes upon the system going into an overload condition, determining an overload time limit based upon the temperature, the overload condition and an initial load condition. In an aspect, the method further includes upon the system going into a back-up power mode, determining a battery autonomy based upon the temperature.

Claims

1. A method of controlling an uninterruptible power supply system with a controller of the uninterruptible power supply system to improve component life, comprising:

periodically sensing a temperature that the uninterruptible power supply system is experiencing with a temperature sensor and receiving with the controller the sensed temperature from the temperature sensor;

after the controller receives each periodically sensed temperature, updating with the controller a maximum power output limit of the uninterruptible power supply system based on the sensed temperature most recently received by the controller wherein if the sensed temperature has increased the maximum output power limit is decreased and if the sensed temperature has decreased the maximum power output is increased; and

then controlling the uninterruptible power supply system with the controller so that a maximum power output of the uninterruptible power supply system does not exceed the updated maximum power output limit.

2. The method of claim 1 wherein updating with the controller the maximum power output limit includes setting with the controller the maximum power output limit to a value in a range of values associated with values for the temperature wherein as the values for the temperature progress from lower to higher the associated values for the maximum power output limit progress from higher to lower.

3. The method of claim 2 wherein the temperature is an ambient temperature in an equipment enclosure in which at least a rectifier and inverter of the uninterruptible power supply system are located.

4. The method of claim 1 further including upon the uninterruptible power supply system going into an overload condition, determining an overload time limit based on the temperature, the overload condition that the uninterruptible power supply system is in and an initial load condition which is a load condition experienced by the uninterruptible power supply system immediately before the uninterruptible power supply system went into the overload condition, and controlling the uninterruptible power supply system with the controller to shut down an inverter of the uninterruptible power supply system when the determined overload time limit is exceeded.

5. The method of claim 4 further including upon the uninterruptible power supply system going into a back-up power mode where a battery of the uninterruptible power supply system is used to supply DC power to an inverter of the uninterruptible power supply system, determining a battery autonomy based on the temperature and controlling the uninterruptible power supply system with the controller to shut down the inverter when the determined battery autonomy is exceeded.

6. The method of claim 5 wherein the temperature is an ambient temperature in an equipment enclosure in which at least the rectifier and inverter of the uninterruptible power supply system are located.

7. The method of claim 4 wherein the temperature is an ambient temperature in an equipment enclosure in which at least the rectifier and inverter of the uninterruptible power supply system are located.

8. A method of controlling an uninterruptible power supply system with a controller of the uninterruptible power supply system to improve component life, comprising:

sensing an ambient temperature in an equipment enclosure in which at least the rectifier and inverter of the uninterruptible power supply system are located and receiving with the controller the sensed ambient temperature from the temperature sensor; and

upon the uninterruptible power supply system going into an overload condition, determining an overload time limit based on the ambient temperature, the overload condition that the uninterruptible power supply system is in and an initial load condition which is a load condition experienced by the uninterruptible power supply system immediately before the uninterruptible power supply system went into the overload condition, and controlling the uninterruptible power supply system with the controller to shut down an inverter of the uninterruptible power supply system when the determined overload time limit is exceeded.

9. A method of controlling an uninterruptible power supply system with a controller of the uninterruptible power supply system to improve component life, comprising:

sensing an ambient temperature in an equipment enclosure in which at least the rectifier and inverter of the uninterruptible power supply system are located and receiving with the controller the sensed ambient temperature from the temperature sensor; and

upon the uninterruptible power supply system going into a back-up power mode where a battery of the uninterruptible power supply system is used to supply DC power to an inverter of the uninterruptible power supply system, determining a battery autonomy based on the temperature and controlling the uninterruptible power supply system with the controller to shut down the inverter when the determined battery autonomy is exceeded.