Abstract

A method of measuring electrical power including the steps of measuring a first electrical input variable at an input to a power conditioner connected to an electricity supply, measuring one or more electrical output variables at an output of the power conditioner, calculating a second electrical input variable at the input to the power conditioner according to the one or more electrical output variables measured at the output and the first electrical input variable measured at the input, calculating an estimated power according to the measured first electrical input variable and the calculated second electrical input variable, and sending the estimated power via a data interface.

IPC Classes  ?

• G01R 11/32 - Watt-hour meters
• G01R 21/00 - Arrangements for measuring electric power or power factor

Abstract

A system for reducing power consumption in a power supply circuit including: a transformer including: a core; a first winding including a first end and a second end of a first wire wound on the core; a second winding including a first end and a second end of a second wire, wherein the second wire has a larger cross-section than the first wire and the second end of the first wire is connected to the first end of the second wire; an input electrically connecting the first and second windings to the power supply circuit; and an output for connecting to a load; and a controller connected to the transformer for controlling an output voltage at the output, wherein the output voltage is less than a supply voltage at the input, to reduce the power consumption of the load.

IPC Classes  ?

• H02M 5/12 - Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
• G05F 5/04 - Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output using a transformer or inductor as the final control device