RIPPLE EXTRACTION DEVICE, MOTOR CONTROL APPARATUS, VEHICLE SEAT, AND RIPPLE EXTRACTION METHOD

A ripple extraction device (3) extracts ripple components contained in a current signal of a motor (2). The ripple extraction device (3) is provided with: a current-voltage converter (10) that converts a current signal of the motor (2) into a voltage signal; a filter (40) that filters the voltage si...

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Bibliographic Details
Main Authors ITO, TAKAYOSHI, TANAKA, SOICHIRO, KOWATA, KOHEI, SHIMAZAKI, HAYATO
Format Patent
LanguageEnglish
French
Japanese
Published 20.09.2012
Subjects
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Summary:A ripple extraction device (3) extracts ripple components contained in a current signal of a motor (2). The ripple extraction device (3) is provided with: a current-voltage converter (10) that converts a current signal of the motor (2) into a voltage signal; a filter (40) that filters the voltage signal converted by the current-voltage converter (10), and attenuates the ripple components; and a differential amplifier (50) that obtains the difference between the voltage signal converted by the current-voltage converter (10) and an output signal of the filter (40). L'invention porte sur un dispositif d'élimination des ondulations (3) qui élimine les composantes ondulatoires contenues dans un signal électrique d'un moteur (2). Le dispositif d'élimination des ondulations (3) possède : un convertisseur courant-tension (10) qui convertit un signal de courant d'un moteur (2) en un signal de tension ; un filtre (40) qui filtre le signal de tension converti par le convertisseur courant-tension (10), et qui atténue les composantes ondulatoires ; et un amplificateur différentiel (50) qui obtient la différence entre le signal de tension converti par le convertisseur courant-tension (10) et le signal de sortie du filtre (40).
Bibliography:Application Number: WO2012JP56362