Add LA 100-P information to AMDS/current card section in AMDC article

[noguchi-takahiro]

This PR adds LA 100-P information to AMDS/current card section in AMDC article to close #155.

Notes

Here is the note from a previous student of how to determine the burden resister:

For the current card, the burden voltage was chosen as 10V by the card designer so that it is within the range of the Analog to Digital Converter.
If you choose anything lower than 10V, that should be okay.

I see your concern that the datasheet recommends the burden resistor to be 0-33 ohms. So in your case the burden voltage will be lower than 10V
For a current range of 150V, your secondary current will be I_secondary = 150/2000 = 0.075A.
(V_burden = R*I_secondary = 33*0.075 = 2.475V)

For my card designs I think that I had chosen 28 Ohms

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3. Do all Markdown files follow the CONTRIBUTING article template? Yes
4. Do all links work in the material that the PR is adding? No, one link is not working in resources section, which will be updated through this PR.
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6. Did the PR fully address the Approach section of the issue(s) it is closing? Yes

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Standard checklist

1. Are all files under 300 kB (if not, please carefully assess whether it is worth committing them)? **Yes or No**
2. Are all files named according to the appropriate [naming convention](https://github.com/Severson-Group/research-repo-template?tab=readme-ov-file#file-naming), i.e., dash-case, camelCase, snake case? **Yes or No**
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4. Do all links work in the material that the PR is adding? **Yes or No**
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6. Did the PR fully address the `Approach` section of the issue(s) it is closing? **Yes or No**

Please work on addressing any **No** items.

[noguchi-takahiro]

@Daehoon-Sung when you have a chance, could you review the updated current card article of AMDC doc? Here is the rendered article: Current - AMDC Platform.pdf

I added a new sensor information of LA 100-P:

Datasheet can be found in this PR that we are planning to merge soon as well. Also, I am wondering if we want to do the same calculation using the LA 100-P as follows:

Do you have any ideas of how we can achieve sensing of Vout = 0V @-150 A and Vout = 5V @150 A using the LA 100-P sensor?

[Daehoon-Sung]

Hello @noguchi-takahiro. Do you know the PR that Ryan asked me to help with his current sensor calibration?

I remember I uploaded the pdf showing my calculation on how to calulate the current sensor output?

[noguchi-takahiro]

Per 7/27, this comment is a promising that you are meaning here. It would be helpful if you could review and comment regarding my question here.

[Daehoon-Sung]

Hello @noguchi-takahiro.

For LA 100-P, to achieve sensing of Vout = 0V @-150 A and Vout = 5V @150 A, N1 should be more than 1 turn (number of turns on the LA-100P) and the Ra, Rb, Rc need to be reselected. If we use Ra, Rb, Rc as same as the LA55-P current sensor board we currently have, then Rburden is out of the manufacturer recomended range.

I have calculated several options for LA100-P to achieve Vout = 0V @-150 A and Vout = 5V @150 A here:

NumberChanged column means the # of resistors we need to change from Ra Rb Rc from the LA55-P current sensor board. For example, if NumberChanged is 1, it means we only need to change one resistor from the LA55-P current sensor board.

My recommendation is:

• N1 = 3
• Ra_ohm = 1240
• Rb_ohm = 28700
• Rc_ohm = 1210
• Rburden_ohm = 23.2
• Vref = 5

Although we need to change 3 resistors, this combination is the most accurate. With this combination, you can acheive:

• Vout = 0V @-149.9953 A and Vout = 5V @150.002 A

For the organizations, I think we can move the LA100p to the end of the document with a brief comment, showing as an example for the high current sensor, you can use LA100p. And using the equations that are already in the document, choose

• N1 = 3
• Ra_ohm = 1240
• Rb_ohm = 28700
• Rc_ohm = 1210
• Rburden_ohm = 23.2
• Vref = 5
  to achieve Vout = 0V @-149.9953 A and Vout = 5V @150.002 A.