Kirchoff - solve block Prime
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Kirchoff - solve block Prime
In MathCad 14 it was no problem using solve combined with Kirchoff laws on a circuit to figure out different current, but in MathCad Prime it doesn't work when i type the same things in solve block.
What am I doing wrong?
MathCad 14 on the left and Prime on the right
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See please pictures 17/15-17.18 and one Mathcad Prime sheet here - Study 17. Cogeneration (CHP), trigeneration (CCHP) and quadrogeneration (CCHPI) or how much of mathematic is contained in thermal engineering
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Firstly can you provide a worksheet as it is difficult to determine the issue from an image.
However, it seems you are solving symbolically in Mathcad and not in Prime. Is there a reason you are solving symbolically?
Mike
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I have just used the method that i have been tought one my Nspire.
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In MC 15 (left panel) you are using a symbolic solve, which does not require guesses for the variables you wish to solve for. In Prime (right panel) you are using a numeric solve, which does require guesses. Either use a symbolic solve, or add guess values for the currents.
You should also get rid of the first equation. Given I1 and I2 it's trivial to calculate I after the solve block.
Lastly, Prime includes a converter that will convert MC 15 worksheets to Prime worksheets. That saves you the work of retyping everything, and also avoids the possible errors associated with doing that.
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See please pictures 17/15-17.18 and one Mathcad Prime sheet here - Study 17. Cogeneration (CHP), trigeneration (CCHP) and quadrogeneration (CCHPI) or how much of mathematic is contained in thermal engineering
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Thanks for the correct answer!
The book Elrctrical Engineering studies with Excel, Mathcad and Internet is in costraction!
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Arh know I can see it... Those guess values are totally misunderstood by me. It works know. But I can't see the idea of theses guess values? Can anyone explain it to med?
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I suggest you read up on Solve Blocks in the help menu.
Mike
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All numeric non-linear solvers are iterative. They start at some point on the error surface, and head downhill until they find a minimum (i.e. a minimum error). The starting point is given by the guess values.
