EVM430-I2040S: Power (W, VAr and VA) Data issues.

Hi Bilal.

Could you share more details about inaccurate VA? Is will have a big error occur sometimes? Or keep always error?

Thanks!

Best Regards

Johnson

Reactive Power (VA) is more concerning. There is not particular difference - something its half then expected value.   We have noticed that phase angle is wrong as well. 

Reactive Power (VA) is more concerning. There is not particular difference - something its half then expected value.   We have noticed that phase angle is wrong as well. 

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Hi Bilal,

Looks incorrect phase angle should the root cause, you test this EVM with AC source? And use power analysis to monitor those data? Or just connect to 220V AC?

Thanks!

Best Regards

Johnson

Hello Johnson, 

Test is connected to 230V AC from mains. No AC source or Load is used. 

1 Amp current is a simple mains heater adjusted to draw 1 amp.

What's the solution. How do we calibrate Phase Angle please.

Regards

Bilal

Hello Johnson, 

We do need support on this. At the moment you reply once ever 24 hours.

We are working on EMDC for 2 plus year. Kind of suck with this issue. There is very limited documentation available. 

Hi Bilal,

I think this document can help you:

https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/998694/msp430f67791a-how-to-perform-gain-and-phase-calibration-on-each-phase-without-using-emdc-gui/3704246?tisearch=e2e-sitesearch&keymatch=FAQ%2525252520EMDC%2525252520Calibration#3704246

8623.2021-05-19 EMDC Calibration Process.pdf

Thanks!

Best Regards

Johnson