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  • Three-Phase Shunt-Based Energy Metrology Reference Design

    • TIDUF27A February   2025  – March 2025 AMC131M03 , MSPM0G1507

       

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  • Three-Phase Shunt-Based Energy Metrology Reference Design
  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
    2. 1.2 End Equipment
    3. 1.3 Electricity Meter
    4. 1.4 Power Quality Meter, Power Quality Analyzer
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Voltage Measurement Analog Front End
      2. 2.2.2 Analog Front End for Current Measurement
      3. 2.2.3 XDS110 Emulator
      4. 2.2.4 Bluetooth® Data Transmission
      5. 2.2.5 Bluetooth® Connection Between Two Modules
      6. 2.2.6 Bluetooth® to UART Connection
      7. 2.2.7 Magnetic Tamper Detection With TMAG5273 Linear 3D Hall-Effect Sensor
    3. 2.3 Highlighted Products
      1. 2.3.1  MSPM0G3507
      2. 2.3.2  AMC131M03
      3. 2.3.3  CDC6C
      4. 2.3.4  RES60A-Q1
      5. 2.3.5  TPS3702
      6. 2.3.6  TPD4E05U06
      7. 2.3.7  ISOUSB111
      8. 2.3.8  LMK1C1104
      9. 2.3.9  MSP432E401Y
      10. 2.3.10 TPS709
      11. 2.3.11 TMAG5273
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 Clocking System
        1. 3.1.1.1 BAW Oscillator
        2. 3.1.1.2 Crystal Oscillator
        3. 3.1.1.3 PWM
        4. 3.1.1.4 Clock Buffers
      2. 3.1.2 SPI Bus Configuration
      3. 3.1.3 Jumper Settings for LED and UART
    2. 3.2 Software Requirements
      1. 3.2.1 UART for PC GUI Communication
      2. 3.2.2 Direct Memory Access (DMA)
      3. 3.2.3 ADC Setup
      4. 3.2.4 Calibration
    3. 3.3 Test Setup
      1. 3.3.1 Connections to the Test Setup
      2. 3.3.2 Power Supply Options and Jumper Settings
        1.       51
      3. 3.3.3 Cautions and Warnings
    4. 3.4 Test Results
      1. 3.4.1 Electricity Meter Metrology Accuracy Results
      2. 3.4.2 Radiated Emissions Performance
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 PCB Layout Recommendations
        1. 4.1.3.1 Layout Prints
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author
  12. 6Revision History
  13. IMPORTANT NOTICE
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Design Guide

Three-Phase Shunt-Based Energy Metrology Reference Design

Description

This reference design implements Class 0.2S three-phase energy measurement using an isolated high-performance, multichannel analog-to-digital converter (ADC), which samples shunt current sensors at 4kHz to measure the current and voltage of each leg of the AC Mains. The reference design achieves high accuracy across a wide input current range (0.05A–100A) and supports higher sampling frequencies necessary for power quality features such as individual harmonic analysis. Faster ADC sampling rates of up to 16ksps can be supported when using a TI Arm® Cortex®-M0+ host microcontroller for calculating the metrology parameters.

Resources

TIDA-010244Design Folder
MSPM0-SDKTool Folder
MSPM0G3507, AMC131M03Product Folder
LMK1C1104, ISOUSB111Product Folder
TMAG5273, MSP423E401YProduct Folder
RES60A, CDC6C, CC2340R5Product Folder
TIDA-010244 Ask the TI E2E™ support experts

Features

  • Three-phase metrology for electricity meters that meets class 0.2S active energy accuracy requirements across 1000:1 input range
  • Support for three-phase four-wire (3P4W) or three-phase three-wire (3P3W) systems with shunts
  • Active and reactive energy and power, root mean square (RMS) current and voltage, power factor, and line-frequency calculations
  • Isolated USB Type-C® with onboard XDS110 debug probe with 5kVRMS isolation, tested across 100mA to 100A input range and 100V to 270V
  • Capable of detecting magnetic tampering using a linear 3D Hall-effect sensor
  • Software for energy metrology with pulsed outputs to a reference test system and displaying results on a Microsoft® Windows® PC GUI

 
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