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CCS/TIDM-HV-1PH-DCAC: was the sensor broken?

kim jonghoe
Prodigy 120 points

Part Number: TIDM-HV-1PH-DCAC
Other Parts Discussed in Thread: TIEVM-HV-1PH-DCAC

Tool/software: Code Composer Studio

hello

When I use "TIEVM-HV-1PH-DCAC" I`m get in trouble,

the input sensor of inverter was not work (guiVbus) 

It was "Build 2 : DEMO". when I raise DC source to 190V I can`t realized the boardstate was tripped by overcurrenttrip.

then I raised DC source to 380V,  I thought it was broken at that time.

from then, it can`t sense the Voltage.

What should I do?

was the sensor broken? or was there another reason?

How can I fix it?

PS. when I check it to “Build 1 : open loop” despite the increased voltage, the input sensor was move like Fig 1. looks like just ripple

                                                                                                                     <Fig 1>

  • 0
    TI__Mastermind 43730 points
    Kim,

    When you are seeing these type of issues, it's safe to work at lower voltage and test the board. The board is designed for people who are already experienced with risks of HV and know how to debug the boards. It is not intended for untrained individuals. Please refer to the disclaimer you revieved with the board.

    I will typically go back to build level 1, and run the code. Now i will apply some input voltage ~20V or so. See if GuiVbus is correct or not.

    if not, you need to debug the board GuiVbus sensing circuit. You can look at the schematic and probe the voltage across the opamp signal ouptut and see the value if it correaltes with the scaled value you will expect. (please note it is only accepatable to do so at low voltages <25V), please follow your company's procedure in working with these voltages.

    If it does not correlate you will need to debug the circuit/ replace part. Only touch the board when it is de-energized and not at high temprature.
  • 0 in reply to Manish Bhardwaj
    TI__Mastermind 43730 points
    Kim,

    I had provided this reply 15 days ago, I did not hear back. I will close this thread.

    Please start a new thread to update us on your issue if you still need help.

    -Manish