11.3 Component behavior - Electrical components

The following image combines a Block Definition Diagram (BDD) representation of MagicDraw/Cameo SysPhSLibrary components vs the SysPhS-1.1 spec table 11.3.4 Electrical components and an unwired representation of them in a Internal Block Diagram (IBD):

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Beware that:

SysML vs Modelica: GOTCHA: Terminology: A 'connector' in Modelica is equivalent to the Type of a Port in SysML. A Connector in SysML-1.x is equivalent to a 'connect(source,target)' in Modelica.

Note how some of the Port names have been re-mapped using the 'name' tagged value of «ModelicaPort» or «SimulinkPort».

There are a couple of subtleties when dealing with the electrical components.

The Port 'p' on the SysPhS Electrical.Ground block is 'inout'. It maps to a Modelica Pin, where:

Modelica: GOTCHA: Sometimes the name 'p' is used for any Pin (such as on Ground) and sometimes 'p' is used for a specifically PositivePin (as opposed to 'n' for NegativePin).

A typical implementation of Modelica.Electrical.Analog.Interfaces.Ground is:


connector Pin "Pin of an electrical component"
  SI.ElectricPotential v "Potential at the pin";
  flow SI.Current i "Current flowing into the pin";
end Pin;

So current i flowing back out of the Ground is negative.

Also on the Modelica side, it's worth noting the particular usage of the word 'Port':

Modelica: Naming convention: Why does the OnePort family of electrical components have 2 Pins? Where is the "one port"?

Where Modelica.Electrical.Analog.Interfaces.OnePort is extended by many basic analog components such as Modelica.Electrical.Analog.Basic.Resistor.

It's worth noting that use of the term Connector in UML/SysML is very different from that of the connector keyword in Modelica, as explained under: Concerning definitions: "a connector end" vs "a connector between 2 ends" vs "connection" vs "connect" in various technologies.

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Figure 32: Elements for signal flows of electrical quantities [additional]

Notes

[TIP, WARNING] Modelica: GOTCHA: Sometimes the name 'p' is used for any Pin (such as on Ground) and sometimes 'p' is used for a specifically PositivePin (as opposed to 'n' for NegativePin).

[MODELLING, NAMING] Concerning definitions: "a connector end" vs "a connector between 2 ends" vs "connection" vs "connect" in various technologies

[COMPLICATION, GOTCHA, NAMING, WARNING]{INFORMATIVE} SysML vs Modelica: GOTCHA: Terminology: A 'connector' in Modelica is equivalent to the Type of a Port in SysML. A Connector in SysML-1.x is equivalent to a 'connect(source,target)' in Modelica.

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SysPhS-1.1

SysPhS zone (SysML Extension for Physical Interaction and Signal Flow Simulation)

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