Multi-Phase Rogowski-Based E-Meter (TIDM-ROGOWSKITHREEPHASE-F47197)
This design, featuring the MSP430F47197 device, implements a highly integrated single-chip electricity metering solution, with support for Rogowski coil current sensors. Hardware and software design files are provided to enable calculation of various parameters for multi phase energy measurement, such as RMS current & voltage, active and reactive power and energies, power factor and frequency. The added hardware and software support for Rogowski coils make it easy to interface with Rogowski coils with minimal hardware changes when migrating from traditional current transformers. Rogowski coils traditionally provide a ease of use vs. traditional transformers, utilizing an air coil instead of iron core. The Rogowski coil current sense library implements an efficient software integration of the Rogowski output, enabling this to be a single chip solution for 3-phase e-metering. Software package also includes an example application for quick and easy evaluation of the hardware and software.
3 phase .2% energy metering solution Low cost isolated current sensing using Rogowski Coils Software integrated solution – minimal hardware changes to migrate from existing CT based solutions Current sensing immune to EMI Designed with high-pass filter utilized after current sample for DC-removal AC signals from mains can be directly interfaced without the need for level shifters"
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