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298 3. Reference Manual<br />

MaxDelta<br />

One of the conditions included in the automatic step size control is a check for rapidly changing<br />

variable values from a certain point in time to its succeeding time instant. The maximum allowed<br />

deviation is controlled via the option MaxDelta. The default setting is MaxDelta −> 1.<br />

MaxIterations<br />

MaxIterations specifies the maximum number of iterations the nonlinear equation solver should use<br />

attempting to find a solution. The option setting can either be an integer int or a list of two integers<br />

{int , int }. If it is specified as a single integer int then it is equivalent to the list {int, int}. The<br />

first integer value defines the iteration limit for finding a DC operating-point and the second integer<br />

value the iteration limit for transient computations, respectively. If the number of iterations for the<br />

operating-point computation exceeds the limit, an error message is generated and the computation is<br />

interrupted. If the iteration limit for transient computations is exceeded, the step size is reduced by<br />

the factor given by the option StepSizeFactor. The default setting is MaxIterations −> {100, 20}.<br />

MaxSteps<br />

The option MaxSteps limits the number of integration steps. The computation will be stopped<br />

immediately if the limiting value is exceeded. The default setting is MaxSteps −> Automatic, which<br />

means MaxSteps ⩵ <br />

tend tstart <br />

StartingStepSize .<br />

MaxStepSize<br />

The option MaxStepSize specifies the upper limit of the integration step size. The default setting is<br />

MaxStepSize −> Automatic, which means MaxStepSize ⩵ <br />

tend tstart <br />

.<br />

MinStepSize<br />

The option MinStepSize specifies the lower limit of the integration step size. The computation will<br />

be stopped immediately if the integration step size falls below this limit. The default setting is<br />

MinStepSize −> Automatic, which means MinStepSize ⩵ <br />

tend tstart <br />

.<br />

NonlinearMethod<br />

The option NonlinearMethod allows for choosing between different algorithms for numerically<br />

solving nonlinear equation systems. The default setting is NonlinearMethod −> FindRoot. Valid<br />

option values are as follows:

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