MEASUREMENT METHOD OF PWM-CONTROLLED AC CURRENT AND DEVICE THEREFOR

PROBLEM TO BE SOLVED: To accurately measure the amplitude and effective value of PWM-controlled AC current.SOLUTION: A measurement method of PWM-controlled AC current includes a current-voltage conversion step of converting PWM-controlled AC current to a voltage signal, an A/D conversion step of con...

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Bibliographic Details
Main Authors KUMAZAWA KATSUMI, SATO SHIGEKI
Format Patent
LanguageEnglish
Published 20.09.2012
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:PROBLEM TO BE SOLVED: To accurately measure the amplitude and effective value of PWM-controlled AC current.SOLUTION: A measurement method of PWM-controlled AC current includes a current-voltage conversion step of converting PWM-controlled AC current to a voltage signal, an A/D conversion step of converting the voltage signal converted in the current-voltage conversion step to a digital signal at a sampling period which can reproduce the waveform of the voltage signal, and a measurement step of calculating the amplitude and effective value of AC current based on the digital signal converted in the A/D conversion step.
Bibliography:Application Number: JP20110045030