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ptc-50710351-Visitor
1-Visitor
Aug 7, 2014 5:59 PM UTC
Solved

Solve Block

I'm wondering if anyone has any insight to this problem.

I'm attempting to use the solve block to simulataneously solve for 3 unknowns using 3 equations. When I try, it returns a "These units are not compatible" error on the last variable of the find function. It doesn't matter which variable is in the last spot, it is always that one that is incorrect.

I'm attaching a screenshot of the values. Any help is greatly appreciated.

MikeArmstrongAnswer
1-Visitor
Aug 7, 2014 7:12 PM UTC

Isaac Cohen wrote:

Also, looking around I'm finding that people are saying that you shouldn't use variables with different units in find. I've tried adding a second find for the inductors, but it doesn't seem to help.

That's not an issue with Prime

Have a look at the attached. There was something wrong with your units., so I have divided R.min by ohms and it works. You have not allocated any units to Q.

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8 replies

MikeArmstrong1-Visitor
1-Visitor
Aug 7, 2014 6:07 PM UTC

Try removing the units from the variables which get square rooted.

Can you upload a worksheet?

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ptc-50710351-VisitorAuthor
1-Visitor
Aug 7, 2014 6:56 PM UTC

Also, looking around I'm finding that people are saying that you shouldn't use variables with different units in find. I've tried adding a second find for the inductors, but it doesn't seem to help.

P.S. My reply post about the worksheet request is being moderated because I included a link to the worksheet. I'm not sure how to upload the worksheet otherwise.

EDIT: I figured it out. I tried using it without units by the way and it said there was no solution.

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ptc-50710351-VisitorAuthor
1-Visitor
Aug 7, 2014 7:10 PM UTC

Sorry, I just found that I multiplied instead of divided!

My fault!

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