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Ansoft Designer / Ansys Designer 在线帮助文档：

Nexxim Simulator >
Nexxim DC Analysis >
   DC Analysis Technical Notes >
       Nexxim DC Analysis Convergence Criteria >
           Delta Check               


Delta Check

The delta check is also known as the update criterion. As the solution of the Newton-Raphson solver gets close to the correct values, the norm of the voltage vector Δvk should approach zero. The norm of Δvk is the square root of the sum of the squares of the vector elements, represented by ||Δvk||. The delta check is satisfied when:

 

The default value for reltol is 0.001 (dimensionless). The default for vntol is 50μV (50e-6 Volts).



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