The Soft Start Control component controls the output, $v_{\mathrm{Ref}}$, in the range $\left[0\,1\right]$ with respect to nominal voltage.

The Boolean input $\mathrm{start}$ going true at $t\=t_0$ causes the output $v_{\mathrm{Ref}}$ to rise, $v_{\mathrm{Ref}}\=v_{\mathrm{Start}}\+\left(1-v_{\mathrm{Start}}\right)\frac{t-t_0}{t_{\mathrm{RampUp}}}$.

If the output current exceeds $i_{\mathrm{Max}}$ during the starting ramp, the ramp is halted; it resumes if the current drops below $i_{\mathrm{Min}}$.

The Boolean input $\mathrm{start}$ going false at $t\=t_0$ causes the output $v_{\mathrm{Ref}}$ to drop, $v_{\mathrm{Ref}}\=-\frac{t-t_0}{t_{\mathrm{RampDown}}}$.

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.