Multi-phase Energy Measurement with Isolated Shunt Sensors Reference Design

(ACTIVE) TIDA-00601

Description & Features

Technical Documents

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Magnetically Immune Transformerless Power for Isolated Shunt Current Measurement Reference Design

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Key Document

Description

The TIDA-00601 design implements a Class 0.5% three-phase energy measurement system with isolated shunt sensors.  The isolation is achieved through the use of isolated delta-sigma modulators that have output circuitry capacitively isolated from input circuitry.  An energy measurement SoC takes the different bit-streams from the isolated modulators and uses its on-board digital filters to produce ADC sample readings.  The energy measurement SoC is also used for sensing voltages, calculating metrology parameter values, driving the board’s LCD, and communication to a PC GUI via the board’s isolated RS-232 circuitry.

This reference design uses the ISO7420 and ISO7421. This reference design can also be used with the ISO7320C and ISO7321C.

This reference design uses the AMC1304M05. This reference design can also be used with the AMC1304M25.

This reference design uses the MSP430F67641. This reference design can also be used with the MSP430F67641A.

Features
  • Class 0.5% three-phase metrology with galvanically isolated shunt current sensors
  • Shunt isolation with working isolation voltage up to 1 kV AC and peak isolation voltage of 7kV
  • TI Energy Library firmware calculates all energy measurement parameters including active and reactive power and energy, RMS current and voltage, power factor, and line frequency
  • Isolated RS-232 with 3 kV RMS operating isolation boundary for communication to PC GUI
  • Built-in 160-segment display for display of  metrology parameters

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TI Devices (10)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
AMC1304M05  Reinforced Isolated Modulator With LDO Regulator, ±50mV Input, and CMOS Interface  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
AMC1304M25  Reinforced Isolated Modulator With LDO Regulator, ±250mV Input, and CMOS Interface  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
ISO7320C  Robust EMC, Low Power, Dual-Channel 2/0 Digital Isolator, Fail-Safe High  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7321C  Robust EMC, Low Power, Dual-Channel 1/1 Digital Isolator, Fail-safe High  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7420  Low Power Dual Channel Isolators  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7421  Dual Channel, 1/1, 1Mbps Digital Isolator   Isolation  Sample & Buy View Design Kits & Evaluation Modules
MSP430F67641  MSP430F676x1 - Low cost 3-phase metering SOC  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
MSP430F67641A  MSP430F676x1A Polyphase Metering SoCs  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
SN6501  Low-Noise 350 mA, 410 kHz Transformer Driver for Isolated Power Supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
TRS3232  3-V to 5.5-V Multichannel RS-232 Line Driver/Receiver With +/-15-kV ESD Protection  Interface  Sample & Buy Not Available

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 26777 11 Aug 2015 1,680
Design files (5)
Title Abstract Type Size (KB) Date Views
PDF 247 17 Jan 2017 182
ZIP 350 12 Aug 2015 103
PDF 96 12 Aug 2015 594
ZIP 288 28 May 2015 125
PDF 380 28 May 2015 73
Related Tools & Software

Software (1)




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