Simulation of Modelica.Electrical.Analog.Examples.ControlledSwitchWithArc from MSL3.1 goes into an infinite loop.

[Adrian Pop]

Modelica.Electrical.Analog.Examples.ControlledSwitchWithArc from MSL3.1 seems to go into an infinite loop.

[Jens Frenkel]

The solver DASSRT reduce the stepsize after 0.593 seconds and the solver information value IDID switches from 3 to 1

/* IDID = 1 -- A step was successfully taken in the */
/* intermediate-output mode. The code has not */
/* yet reached TOUT. */

The solver continue with a very small stepsize. It is not a loop but we have to know the reason for the reduced stepsize.

[Jens Frenkel]

The equations:

• switch2.quenched = switch2.off AND (abs(constantVoltage2.n.i) <=  abs(switch2.v) * switch2.Goff OR pre(switch2.quenched))

• 0.0 = if switch2.on then switch2.v - switch2.Ron * constantVoltage2.n.i else if switch2.quenched then constantVoltage2.n.i - switch2.Goff * switch2.v else switch2.v - min(switch2.Vmax,switch2.V0 + switch2.dVdt * (time - switch2.tSwitch)) * sign(constantVoltage2.n.i)

build a linear mixed equation system. In function function_updateDependents the linear mixed equation system is solved but in the function functionODE is a linear systems solved and not a linear mixed systems. The problem is that switch2.quenched can not change the value until IDID is 1 because the function function_updateDependents is not called and  switch2.quenched is only set in the function  function_updateDependents.

[Martin Sjölund]

This now simulates, although it's listed as wrong result in the testsuite