Discussion:
[COMSOL_Users] AC/DC RMM not converge but there are result
hidayat_akm
2013-04-04 13:15:45 UTC
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Hi All,

i have a 3D-PMSM-Modell and after 1 days of simulation (stationary) i got this. it wont converge. Normally ErrEst (estimated error) should smaller than 1e-3 at damping 1 to converge.

Have somebody idea, are this result reliable enough? if i used the result for Heat transfer (HT). What kind of result would be expected?



Stationary Solver 1 in Solver 27 started at DD-Mrz-YYYY 11:36:06.
Nonlinear solver
Number of degrees of freedom solved for: 1739286.
Symmetric matrices found.
Scales for dependent variables:
mod1.A: 1.1e+002
Iter ErrEst Damping Stepsize #Res #Jac #Sol LinIt LinErr LinRes
1 0.0028 0.0100000 0.0029 4 1 5 35 0.11 0.00027
2 0.003 0.0100000 0.003 6 2 9 53 0.049 0.00012
3 0.0031 0.0100000 0.0031 8 3 12 69 0.11 0.00027
4 0.0021 0.0037601 0.0021 10 4 15 87 0.074 0.00018
5 0.0018 0.0368706 0.002 11 5 17 100 0.072 0.00018
6 0.00036 0.0190713 0.00037 13 6 20 580 0.12 0.00031
7 0.00027 0.0574228 0.0003 14 7 22 657 0.12 0.00029
8 0.00017 0.1636901 0.00017 15 8 24 938 0.12 0.00031
9 0.00019 0.0896618 0.00021 16 9 26 1413 0.12 0.00031
10 0.00017 0.2069280 0.00021 18 10 30 2555 0.12 0.00031
11 0.082 1.0000000 0.52 19 11 33 6094 0.12 0.00031
Stationary Solver 1 in Solver 27: Solution time: 124219 s. (1 day, 10 hours, 30 minutes, 19 seconds)


thank you for reponding
best regards

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