Field device with a switching converter circuit

US10452085B2 · kind B2 · utility

Assignee

• KROHNE Messtechnik GmbH · DE

Inventors

• Michael Gerding · Bochum, DE
• Charalambos Ouzounis · Bochum, DE
• Olaf Kaluza · Herten, DE

Key dates

• Filing date: Jun 5, 2015
• Grant date: Oct 22, 2019
• Expiry date: May 29, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02M3/155
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A field device (1) having a switching converter circuit (2) and a measuring circuit (3) for determining at least one measuring variable. The switching converter circuit (2) is supplied with electric power on the input side and the switching converter circuit (2) is connected to the measuring circuit (3) on the output side and the switching converter circuit (2) supplies the measuring circuit (3) with electric power.The problems associated with changing interfering signals due to the switching converter circuit are reduced in that a load circuit (5) is actuated by a load control circuit (6) so that the output-side electric load at the switching converter circuit (2) does not fall below a minimum electric load.