Power-related amount measurement device

Power-related amount measurement device

PROBLEM TO BE SOLVED: To solve the problem wherein the calculation for power related amounts has errors, if the voltage signal input, current signal input, and A/D converter are influenced by the magnitudes of voltage and current to be detected, the frequency of the voltage and current to be detecte...

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Hauptverfasser: TAKASHI SHINDOI, ATSUFUMI KURODA, KEISHU KONDOU
Format: Patent
Sprache:eng
Schlagworte:
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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creator TAKASHI SHINDOI
ATSUFUMI KURODA
KEISHU KONDOU
description PROBLEM TO BE SOLVED: To solve the problem wherein the calculation for power related amounts has errors, if the voltage signal input, current signal input, and A/D converter are influenced by the magnitudes of voltage and current to be detected, the frequency of the voltage and current to be detected, and an operating temperature. SOLUTION: This power-related amount measuring device is set with primary straight lines, beforehand; changes in the characteristics of a voltage signal input; a current signal input whose parameters are the effective value of voltage Vrms_1; the effective value of current Irms_1, and the power supply frequency, and changes in the characteristic of the A/D converter, whose parameter is its temperature. The device is so formed as to correct the changes in the characteristics, by updating the coefficients of an amplitude phase correction matrix being used at regular operations, at a fixed time intervals. COPYRIGHT: (C)2004,JPO&NCIPI
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SOLUTION: This power-related amount measuring device is set with primary straight lines, beforehand; changes in the characteristics of a voltage signal input; a current signal input whose parameters are the effective value of voltage Vrms_1; the effective value of current Irms_1, and the power supply frequency, and changes in the characteristic of the A/D converter, whose parameter is its temperature. The device is so formed as to correct the changes in the characteristics, by updating the coefficients of an amplitude phase correction matrix being used at regular operations, at a fixed time intervals. 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subjects MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title Power-related amount measurement device
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