Ansteuerungsschaltung und Elektromagnetischer Durchflussmesser

Details

Veröffentlichungs-Nr.

EP3279617

Aktenzeichen

EP17183467

Anmeldetag

27. Juli 2017

Veröffentlichung

31. März 2021

Erteilung

31. März 2021

Rechtsraum

EP

IPC

G01F1/60G01F25/00

Abstract

A drive circuit includes a primary power supplier which supplies a primary electric power in accordance with a state of the drive circuit, a secondary power supplier which supplies an operation electric power and an excitation electric power, an excitation current supplier which supplies an excitation current to an excitation coil, a power supply monitor which compares the voltage value of the operation electric power with a voltage threshold and outputs monitoring information, and a controller which determines whether a short circuit has occurred in the excitation coil based on the monitoring information, and stops supplying the excitation current if the short circuit has occurred. The voltage threshold is higher than a lowest voltage value with which the controller operates, and the voltage threshold is a voltage value representing that the short circuit has occurred in the excitation coil.

Anmelder

Firma

Yokogawa Electric Corporation

Land

🇯🇵 Japan

Fachgebiete