Scicos Block
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Electrical diode

Contents

• Electrical diode
  • Palette
  • Description
  • Dialog box
  • Default properties
  • Interfacing function
  • Modelica model

Palette

• Electrical.cosf - Electrical toolbox

Description

This component consists of a simple diode parallel with an ohmic resistance R. The current passing through this component is defined as a function of the voltage across the ports, i.e.,

$$i = I_{ds} ( \exp^{v/V_t}- 1)+\frac{v}{R}$$

where Ids and Vt are the saturation current and the voltage equivalent of temperature, respectively. If the exponent v/Vt reaches a certain limit (Maxexp), the diode characteristic becomes linear to avoid overflow.

Dialog box

• Saturation current (A)
  Saturation current
  Properties : Type 'vec' of size 1.

• Voltage equivalent to temperature (Volt)
  Voltage equivalent of temperature
  Properties : Type 'vec' of size 1.

• Max exponent for linear continuation
  Max exponent for linear continuation
  Properties : Type 'vec' of size 1.

• R (ohm)
  Parallel ohmic resistance.
  Properties : Type 'vec' of size 1.

Default properties

• Inputs :
  • Modelica variable name : 'p'
    Implicit variable.

• Outputs :
  • Modelica variable name : 'n'
    Implicit variable.

• Parameters :
  • Modelica parameter name : 'Ids'
    Default value : 0.000001
    Is a state variable : no.

  • Modelica parameter name : 'Vt'
    Default value : 0.04
    Is a state variable : no.

  • Modelica parameter name : 'Maxexp'
    Default value : 15
    Is a state variable : no.

  • Modelica parameter name : 'R'
    Default value : 1.000D+08
    Is a state variable : no.

• File name of the model : Diode

Interfacing function

• SCI/macros/scicos_blocks/ModElectrical/Diode.sci [view code]

Modelica model

• SCI/macros/scicos_blocks/ModElectrical/Electrical.mo [view code]