TINA/Spice: simulation read voltage

Alfian Khairi

Prodigy 80 points

Other Parts Discussed in Thread: TINA-TI

Tool/software: TINA-TI or Spice Models

I confused how can the voltmeter read the voltage eventough the swtich is open ??
thank you

over 7 years ago

0 Nikhil Gupta (Product Folder Models) over 7 years ago

TI__Mastermind 39210 points

Alfian,

Please share your TSC file so we can have a look.

0 Alfian Khairi over 7 years ago in reply to Nikhil Gupta (Product Folder Models)

Prodigy 80 points

Skripsi sensor tegangan.TSC

0 Alfian Khairi over 7 years ago in reply to Alfian Khairi

Prodigy 80 points

this circuit is to measure voltage from individual series battery using voltage divider

0 Nikhil Gupta (Product Folder Models) over 7 years ago in reply to Alfian Khairi

TI__Mastermind 39210 points

Alfian,

It looks like a numeric issue. Lot of your switches have 0 resistance parameters. This can give infinite conductance in the simulation matrix which can give these numeric issues. There are 2 recommendations:

1. First preference is to change the 0 resistance values to something small like 1m or so. This is the preferable solution

2. Alternately, you can adjust the sim parameter Shunt Conductance from a default of 0 to 1u.

This should give you a more reasonable solution.

0 Alfian Khairi over 7 years ago in reply to Alfian Khairi

Prodigy 80 points

i understand right now, after i measure the resistance of switch between voltmeter to output of voltage divider. evidently in this simulation the switch have resistance eventough it open state, so ther is voltage drop and volt meter can measure the voltage.
i thought because the switch is mechanical switch when it open the voltmeter didn't connect to output of voltage divider.

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TINA/Spice: simulation read voltage