Vorrichtung zur Korrektur der Versatzes eines Stromsensors

Details

Veröffentlichungs-Nr.

EP3078974

Aktenzeichen

EP16159161

Anmeldetag

8. März 2016

Veröffentlichung

21. April 2021

Erteilung

21. April 2021

Rechtsraum

EP

IPC

G01R19/00G01R35/00H02P21/22G01R31/42G01R31/00B60L3/00B60L50/51

Abstract

Disclosed is an apparatus for correcting an offset of a current sensor. The apparatus includes an inverter (100), a detector (200), and a RMS calculator (400), and a controller (500). The RMS calculator converts the high frequency component extracted from the filter into an effective (RMS) value. The controller, if the effective (RMS) value of the d-axis or q-axis current transformed by the RMS calculator is larger than a preset reference, increases/decreases a currently-set DC offset of each of the current sensors by a certain amount, and replaces the currently-set DC offsets with a DC offset corresponding to a smallest one of the effective (RMS) values of the d-axis or q-axis transformed by the RMS calculator, thereby correcting each of the current sensors. Accordingly, a pulsation in an output torque in controlling an electric motor can be effectively prevented.

Anmelder

Firma

LSIS Co., Ltd.

Land

🇰🇷 Südkorea

Fachgebiete