Determining A Zero Current Of An Alternating Current

摘要

A circuit arrangement for detecting a zero crossing of an alternating current is provided. The circuit arrangement includes a load through which the alternating current can flow, and an evaluation unit connected to the load and configured to evaluate an electrical voltage formed at the load, and to determining zero currents. The load comprises a capacitor through which the alternating current or a current to be measured derived therefrom can flow, and the evaluation unit is configured to account for a phase shift caused by the capacitor for determining the zero currents.

主权项

1. A circuit arrangement for identifying a zero-current of an alternating current, the circuit arrangement comprising:
a load comprising a capacitor, wherein the alternating current or a measuring current derived from the alternating current flows through the load, and an evaluation unit connected to the load and configured to:
evaluate an electric voltage generated on the load through which the alternating current flows, andidentify zero-currents based on a phase displacement effected by the capacitor.