Implementation of a 3-Phase Rogowski Coil Based Watt Hour Meter Reference Design
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This design, 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. 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 a dummy application for quick and easy evaluation of the hardware and software.

  • 3 phase 0.5% energy metering solution
  • Low cost isolated current sensing using Rogowski Coils
  • Software integrator solution – minimal hardware changes to migrate from existing CT based solutions
  • Current sensing immune to EMI
  • No effect of DC components of current
  • No phase shift in current measurement

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
MSP430F67791A  Polyphase Metering SoC with 7 Sigma-Delta ADCs, LCD, Real-Time Clock, 512KB Flash, 32KB RAM  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPS54060  3.5V to 60V Input, 0.5A Step-Down Converter with Eco-Mode  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

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Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
MSP430F67791A Download
TPS54060 Download Download
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User guides (1)
Title Type Size (KB) Date
PDF 560 09 Sep 2014
Design files (5)
Title Type Size (KB) Date
ZIP 425 03 Oct 2014
ZIP 308 03 Oct 2014
PDF 206 03 Oct 2014
PDF 106 03 Oct 2014
ZIP 323 03 Oct 2014
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