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Energy Meter interface

sumathi Sapthagiri
Intellectual 390 points
Other Parts Discussed in Thread: MSP430F6736, TIDM-SERVER-PWR-MON, TM4C1294NCPDT

Hello,

We would like to use Energy metering solution for energy monitoring in our product.

The product is used indoor or outdoor. It is required to measure the energy consumption of a Device that has AC Power supply input. An AC to DC Power module is used to generated DC voltage (constant current output 1A and voltage varying from 52V to 62V, without load the Voltage can go upto 69V.

The requirement is to measure the total energy consumed by this product and should be displayed.

The query is Whether to use the Energy metering IC on AC "Input side" or on the DC Output "Load side".

refered to SLAA517E application report "Implementation of a Single-Phase Electronic Watt-Hour Meter Using the MSP430F6736(A)"

Regards,

Sumathi

  • 0
    TI__Genius 10370 points

    Hi Sumathi,

    Welcome to E2E. To have your question answered as quick as possible, I'm going to move this thread to the proper forum.

    Best Regards,

    Aramis P. Alvarez

  • 0 in reply to Aramis P. Alvarez
    Intellectual 390 points
    Hello,
    Thank You. Hope the expert will reply ASAP.

    Thanks,
    Regards,
    Sumathi
  • 0 in reply to sumathi Sapthagiri
    TI__Mastermind 49692 points

    Hi Sumathi,

    We offer many TI Designs based on MSP430 for energy metering applications, and based on your application, I've listed a few below for your reference.

    1. TIDM-SINGLEPHASEMETER (supports LCD, EVM available for purchase)

    2. TIDM-1PHMTR-ESD (similar to the design above, but with enhanced ESD protection)

    3. TIDM-SINGLEPHASEMETER-AFE (single chip solution with LCD)

    4. TIDM-METROLOGY-HOST (two chip solution with LCD, isolated energy measurement)

    5. TIDM-SERVER-PWR-MON (can work in either DC or AC mode, no LCD, could be used with a host microcontroller, see Figure 3 in the User's Guide for how to measure high voltages using resistor ladder, EVM available for purchase)

    Regards,

    James

    MSP Customer Applications

  • 0 in reply to sumathi Sapthagiri
    TI__Mastermind 49692 points
    Also, I'd recommend measuring the energy consumption on the AC side for better overall accuracy. This way, you'll capture the total energy consumed (including the lost energy from converting AC to DC, DC to DC, etc.), not just the load energy consumption.

    Regards,

    James

    MSP Customer Applications
  • 0 in reply to James Evans
    Intellectual 390 points
    Hello James,
    Thanks for the reply. In our design, it is required to measure the POE Power on PD side..Can i use the TIDM-SERVER-PWR-MON design as reference for the POE Energy metering operation.
    Will it work with TIVA TM4C1294NCPDT?
    We have two requirement. One is to measure energy on AC supply Input in one Board. The other requirement is to measure the energy of POE PD output on a different board.
    So can i design a common module that can measure AC energy as well as POE PD Output Energy using the same Energy metering module.
    Since the Energy metering is requiree on both module , i would prefer using a modular concept, which i can use for both Boards with minimal changes, like providing Do not Mount / or Mount instruction w.r.t to the Board used.
    Kindly reply,

    Regards,
    Sumathi
  • 0 in reply to sumathi Sapthagiri
    TI__Mastermind 49692 points
    Hi Sumathi,

    Yes, I would recommend the TIDM-SERVER-PWR-MON TI Design, since it can be used for AC or DC applications. With some slight changes, this design could be used for both boards: 1) AC configuration on the AC supply input board 2) DC configuration on the POE PD output board.

    This TI Design has a UART communication protocol that could be used to communicate with a host microcontroller like the Tiva TM4C1294NCPDT. In the example application code, take a look at the 'emeter-communication.c' and 'emeter-dlt645.c' files.

    Regards,

    James

    MSP Customer Applications

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