System and method for estimating an efficiency of a power device

A method for estimating an efficiency of a power device, the method comprising:

• identifying a state of operation of the power device;
• measuring power-related information of the power device;
• determining estimated power losses based on the state of operation, power loss parameters associated with the power device, and the measured power-related information of the power device;
• calculating an estimated input power by adding power from the power-related information and the estimated power losses;
• and
• dividing the output power by the estimated input power.

A power device comprising:

• an input to receive estimated input power;
• a power supply circuit, coupled to the input, to provide power;
• an output, coupled to the power supply circuit, to provide output power derived from the power supply circuit;
• and
• a controller, coupled to the power supply circuit, the controller being configured to retrieve at least one stored procedure corresponding to estimating the efficiency of the power device, the stored procedure being configured to
• identify a state of operation of the power device,
• measure power-related information of the power device,
• determine estimated power losses based on the state of operation, power loss parameters associated with the power device, and the measured power-related information,
• calculate an estimated input power by adding power from the power-related information and the estimated power losses, and
• divide the output power by the estimated input power.

An uninterruptible power supply comprising:

• an input to receive estimated input power;
• a power supply circuit, coupled to the input, to provide power;
• an output, coupled to the power supply circuit, to provide output power derived from the power supply circuit;
• and
• a controller, coupled to the power supply circuit, the controller being configured to retrieve at least one stored procedure corresponding to estimating the efficiency of the uninterruptible power supply by
• identifying a state of operation of the uninterruptible power supply,
• measuring the power-related information of the uninterruptible power supply, and
• determining estimated power losses from a look-up table based on the measured power-related information.

An uninterruptible power supply comprising:

• an input to receive estimated input power;
• a power supply circuit, coupled to the input, to provide power;
• an output, coupled to the power supply circuit, to provide output power derived from the power supply circuit;
• and
• means for estimating an efficiency of the uninterruptible power supply by identifying a state of operation of the uninterruptible power supply, measuring the power-related information of the uninterruptible power supply, and determining estimated power losses from a look-up table based on the measured power-related information.