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ULine

Lossy RC Line  Description The U Line (or ULine) component implements a lumped, single-ended, RC transmission line. Each segment consists of a resistance connected from the input to the output of the segment and a capacitance connected from the output of the segment to the common terminal. To get a symmetric line, the first resistor is split into two parts; the following schematic shows the construction.  Equations $R={r}_{\mathrm{actual}}\frac{\mathrm{length}}{N+1}$ ${r}_{\mathrm{actual}}=r\left(1+{\mathrm{\alpha }}_{R}\left(T-{T}_{\mathrm{ref}}\right)\right)$ $C=c\frac{\mathrm{length}}{N}$ Connections

 Name Description Modelica ID $\mathrm{p1}$ Port 1 p1 $\mathrm{p2}$ Port 2 p2 $\mathrm{p3}$ Port 3, common terminal p3 $\mathrm{Heat Port}$ heatPort Parameters

 Name Default Units Description Modelica ID $r$ $1$ $\frac{\mathrm{\Omega }}{m}$ Resistance per meter r $c$ $1$ $\frac{F}{m}$ Capacitance per meter c $\mathrm{length}$ $1$ $m$ Length of line length $N$ $1$ Number of lumped segments N $\mathrm{\alpha }$ $0$ $\frac{1}{K}$ Temperature coefficient of resistance alpha $T$ $293.15$ $K$ Fixed device temperature if Use Heat Port is false T ${T}_{\mathrm{ref}}$ $300.15$ $K$ Reference temperature T_ref Use Heat Port $\mathrm{false}$ True (checked) means heat port is enabled useHeatPort Modelica Standard Library 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.