The Stray Load component models losses dependent of the motor current and shaft speed.

$\mathrm{\tau }\&equals;-{\mathrm{\tau }}_{\mathrm{ref}}{\left(\frac{i}{I_{\mathrm{ref}}}\right)}^2\{\begin{array}{cc}0& P_{\mathrm{ref}}<0\\ {\left(\frac{\mathrm{\omega }}{{\mathrm{\omega }}_{\mathrm{ref}}}\right)}^{p_{\mathrm{\omega }}}& 0\le \mathrm{\omega }\\ -{\left(-\frac{\mathrm{\omega }}{{\mathrm{\omega }}_{\mathrm{ref}}}\right)}^{p_{\mathrm{\omega }}}& \mathrm{otherwise}\end{array}$

$v\&equals;v_p-v_n\&equals;0$

$i\&equals;i_p\&equals;-i_n$

$\mathrm{\phi }\&equals;{\mathrm{\phi }}_{\mathrm{flange}}-{\mathrm{\phi }}_{\mathrm{support}}$

$\mathrm{\omega }\&equals;\stackrel{\&period;}{\mathrm{\phi }}$

$\mathrm{\tau }\&equals;{\mathrm{\tau }}_{\mathrm{support}}\&equals;-{\mathrm{\tau }}_{\mathrm{flange}}$

${\mathrm{\tau }}_{\mathrm{ref}}\&equals;\frac{P_{\mathrm{ref}}}{{\mathrm{\omega }}_{\mathrm{ref}}}$

$\mathrm{lossPower}\&equals;-\mathrm{\tau }\mathrm{\omega }$

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.