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OLine

Lossy Transmission Line

 

Description

Equations

Connections

Parameters

Modelica Standard Library

Description

The OLine component implements a lumped transmission line. Each segment consists of a resistance and an inductance connected in series between the input and output of the segment, and a conductance and capacitance connected in parallel from the output of the segment to the common terminal.

To get a symmetric line, the first resistor and inductor are split into two parts; the following schematic shows the construction.

Equations

L=lengthN+1

R=ractuallengthN+1

G=gactuallengthN

C=clengthN

ractual=r1+αRTTref

gactual=gr1+αGTTref

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

1

Hm

Inductance per meter

l

g

1

Sm

Conductance per meter

g

c

1

Fm

Capacitance per meter

c

length

1

m

Length of line

length

N

1

 

Number of lumped segments

N

αR

0

1K

Temperature coefficient of resistance

alpha_R

αG

0

1K

Temperature coefficient of conductance

alpha_G

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