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ULine

Lossy RC Line

 

Description

Equations

Connections

Parameters

Modelica Standard Library

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=ractuallengthN+1

ractual=r1+αRTTref

C=clengthN

Connections

Name

Description

Modelica ID

p1

Port 1

p1

p2

Port 2

p2

p3

Port 3, common terminal

p3

Heat Port

Conditional heat port

heatPort

Parameters

Name

Default

Units

Description

Modelica ID

r

1

Ωm

Resistance per meter

r

c

1

Fm

Capacitance per meter

c

length

1

m

Length of line

length

N

1

 

Number of lumped segments

N

α

0

1K

Temperature coefficient of resistance

alpha

T

293.15

K

Fixed device temperature if Use Heat Port is false

T

Tref

300.15

K

Reference temperature

T_ref

Use Heat Port

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.

See Also

Analog Components

Electrical Library

Transmission Lines