WOLFRAM SYSTEM MODELER

VariableResistor

Ideal linear electrical resistor with variable resistance

Wolfram Language

In[1]:=
SystemModel["Modelica.Electrical.Analog.Basic.VariableResistor"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

The linear resistor connects the branch voltage v with the branch current i by
i*R = v
The Resistance R is given as input signal.

Attention!!!
It is recommended that the R signal should not cross the zero value. Otherwise depending on the surrounding circuit the probability of singularities is high.

Parameters (4)

useHeatPort

Value: false

Type: Boolean

Description: = true, if heatPort is enabled
T

Value: T_ref

Type: Temperature (K)

Description: Fixed device temperature if useHeatPort = false
T_ref

Value: 300.15

Type: Temperature (K)

Description: Reference temperature
alpha

Value: 0

Type: LinearTemperatureCoefficient (1/K)

Description: Temperature coefficient of resistance (R_actual = R*(1 + alpha*(T_heatPort - T_ref))

Connectors (4)

p

Type: PositivePin

Description: Positive electrical pin
n

Type: NegativePin

Description: Negative electrical pin
heatPort

Type: HeatPort_a

Description: Conditional heat port
R

Type: RealInput

Description: 'input Real' as connector

Used in Examples (5)

ShowVariableResistor

Modelica.Electrical.Analog.Examples

Simple demo of a VariableResistor model

SMPM_Braking

Modelica.Electrical.Machines.Examples.SynchronousMachines

Test example: PermanentMagnetSynchronousMachine acting as brake

DCSE_Start

Modelica.Electrical.Machines.Examples.DCMachines

Test example: DC with serial excitation starting with voltage ramp

DCSE_SinglePhase

Modelica.Electrical.Machines.Examples.DCMachines

Test example: DC with serial excitation starting with voltage ramp

SMPM_Braking

Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.SynchronousMachines

Test example: PermanentMagnetSynchronousMachine acting as brake

Used in Components (1)

VariableResistor

Modelica.Electrical.Polyphase.Basic

Ideal linear electrical resistors with variable resistance

Revisions

  • August 07, 2009 by Anton Haumer
    temperature dependency of resistance added
  • March 11, 2009 by Christoph Clauss
    conditional heat port added
  • June 7, 2004 by Christoph Clauss
    changed, docu added
  • April 30, 2004 by Anton Haumer
    implemented.