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Apparatus and method for measuring power consmption

A technology of power consumption and switching frequency, applied in the direction of measuring device, measuring electric power, electric device, etc.

Inactive Publication Date: 2004-04-07
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, there is no way for consumers to know the actual power consumption of the product currently in use, other than manually specifying the maximum power consumption of the product or according to the label attached to the product

Method used

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  • Apparatus and method for measuring power consmption
  • Apparatus and method for measuring power consmption
  • Apparatus and method for measuring power consmption

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Embodiment Construction

[0022] Usually, the power consumption of the product is measured on the AC input line supplying the current with a special measuring device. Such measuring equipment requires a complicated circuit and is not suitable for a product. The present invention provides a use such as figure 1 The voltage Vs of the secondary winding of the transformer T11 is shown to measure the power consumption, and a method using as image 3 The primary winding voltage of transformer T31 is shown as V ds method to measure power consumption.

[0023] refer to figure 1 and 2A-2G, the following will describe a voltage V using the secondary coil of transformer T11 S method to measure power consumption. figure 1 A circuit diagram of an apparatus for measuring power consumption according to a first embodiment of the present invention is shown. figure 1 The shown device includes a rectifying part 100 , a switching part 101 , a buffer circuit 102 , a transformer T11 , a voltage regulating part 104 , a...

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Abstract

An apparatus for and a method of measuring, in real-time, and indicating power consumption of a product powered by a switching mode power supply (SMPS). Power is supplied to the product through a transformer having a predetermined primary coil inductance, wherein a current of a primary coil of the transformer is turned ON and OFF by pulse-width modulation to supply the power to the electronic device. A drive voltage across the primary coil is monitored and a pulse waveform having a first level corresponding to an ON time of the current in the primary coil and a second level corresponding to an OFF time of the current in the primary coil is developed. Power consumption is calculated based on the drive voltage, the ON time of the current in the primary coil, the predetermined primary coil inductance, and a switching frequency of a pulse width modulator of the SMPS.

Description

[0001] This application claims priority from Korean Patent Application No. 2002-52825 filed with the Korean Intellectual Property Office on September 6, 2002, which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to a device and method for measuring power, in particular to a device for measuring and displaying power consumption of products in real time using a switched mode power supply (SMPS). Background technique [0003] Power consumption is a quantitative expression of the ratio of how much energy is consumed or how much work is done per unit time, and expresses the energy supplied or consumed in a unit of one second. The energy consumption performance level of a product varies according to the power consumed, and a product of low level wastes energy throughout the life of the product. Therefore, it is necessary to confirm the energy consumption performance level and purchase advanced products if possible. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/63G01R21/06G01R21/127H02M3/28
CPCG01R21/127H04N5/63
Inventor 崔容勋
Owner SAMSUNG ELECTRONICS CO LTD
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