Current measuring circuit for a converter, converter circuit and converter

US12132384B2 · kind B2 · utility

Assignee

• AIRBUS (S.A.S.) · FR

Inventors

• Florian Kapaun · Schweinhub, DE
• Gerhard Steiner · Neuenstein, DE

Key dates

• Filing date: May 18, 2022
• Grant date: Oct 29, 2024
• Expiry date: Dec 10, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/56
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

To enable early detection of AC insulation faults, or to permit easier, faster and more accurate measurement of small currents in inverters, a current measuring circuit for a converter is provided. The current measuring circuit has a positive supply rail, a negative supply rail, a reference potential rail and a current measuring device that contains a Y-capacitor and a current sensor connected in series therewith. The load current can be decoupled from the measurement current through the at least one Y-capacitor, so that at high load currents even small fault currents can be acquired reliably with the current sensor.