Modelica.Magnetic.QuasiStatic.FluxTubes.Basic

Basic elements of magnetic network models

Information

This package contains the basic components of quasi static flux tubes package.

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name	Description
Ground	Zero magnetic potential
ElectroMagneticConverter	Electro-magnetic energy conversion
ConstantReluctance	Constant reluctance
ConstantPermeance	Constant permeance
LeakageWithCoefficient	Leakage reluctance with respect to the reluctance of a useful flux path (not for dynamic simulation of actuators)
EddyCurrent	For modelling of eddy current in a conductive magnetic flux tube
Idle	Idle running branch
Short	Short cut branch
Crossing	Crossing of two branches

Modelica.Magnetic.QuasiStatic.FluxTubes.Basic.Ground

Zero magnetic potential

Information

The magnetic potential at the magnetic ground node is zero. Every magnetic network model must contain at least one magnetic ground object.

Connectors

Modelica.Magnetic.QuasiStatic.FluxTubes.Basic.ElectroMagneticConverter

Electro-magnetic energy conversion

Information

The electro magnetic energy conversion is given by Ampere's law and Faraday's law respectively:

In this equation is the magnetomotive force that is supplied to the connected magnetic circuit, is the magnetic flux through the associated branch of this magnetic circuit. The negative sign of the induced voltage is due to Lenz's law.

The static inductance is calculated from the flux linkage

and the current :

This quantity is calculated for information only.

Note

is set to

if .

Parameters

Connectors

Modelica.Magnetic.QuasiStatic.FluxTubes.Basic.ConstantReluctance

Constant reluctance

Information

This constant reluctance is provided for test purposes and simple magnetic network models. The reluctance is not calculated from geometry and permeability of a flux tube, but is provided as parameter.

Extends from FluxTubes.Interfaces.PartialTwoPorts (Partial component with magnetic potential difference between two magnetic ports p and n and magnetic flux Phi from p to n).

Parameters

Connectors

Modelica.Magnetic.QuasiStatic.FluxTubes.Basic.ConstantPermeance

Constant permeance

Information

This constant permeance is provided for test purposes and simple magnetic network models. The permeance is not calculated from geometry and permeability of a flux tube, but is provided as parameter.

Extends from FluxTubes.Interfaces.PartialTwoPorts (Partial component with magnetic potential difference between two magnetic ports p and n and magnetic flux Phi from p to n).

Parameters

Connectors

Modelica.Magnetic.QuasiStatic.FluxTubes.Basic.LeakageWithCoefficient

Leakage reluctance with respect to the reluctance of a useful flux path (not for dynamic simulation of actuators)

Information

Differently from the flux tube elements of package Shapes.Leakage that are calculated from their geometry, this leakage reluctance is calculated with reference to the total reluctance of a useful flux path. Parameter c_usefulFlux is the ratio of the useful flux over the total flux.

Extends from FluxTubes.Interfaces.PartialLeakage (Base class for leakage flux tubes with position-independent permeance and hence no force generation; mu_r=1).

Parameters

Name	Description
c_usefulFlux	Ratio useful flux/(leakage flux + useful flux) = useful flux/total flux [1]
Reference reluctance
R_mUsefulTot	Total reluctance of useful flux path as reference [H-1]

Connectors

Modelica.Magnetic.QuasiStatic.FluxTubes.Basic.EddyCurrent

For modelling of eddy current in a conductive magnetic flux tube

Information

Eddy currents are induced in a conductive magnetic flux tube when the flux changes with time. This causes a magnetic voltage drop in addition to the voltage drop that is due to the reluctance of this flux tube. The eddy current component can be thought of as a short-circuited secondary winding of a transformer with only one turn. Its resistance is then determined by the geometry and resistivity of the eddy current path. Alternatively, a total conductance parameter can be used.

Partitioning of a solid conductive cylinder or prism into several hollow cylinders or separate nested prisms and modelling of each of these flux tubes connected in parallel with a series connection of a reluctance element and an eddy current component can model the delayed buildup of the magnetic field in the complete flux tube from the outer to the inner sections. Please refer to [Ka08] for an illustration.

Extends from FluxTubes.Interfaces.PartialTwoPorts (Partial component with magnetic potential difference between two magnetic ports p and n and magnetic flux Phi from p to n), Modelica.Thermal.HeatTransfer.Interfaces.PartialElementaryConditionalHeatPort (Partial model to include a conditional HeatPort in order to dissipate losses, used for textual modeling, i.e., for elementary models).

Parameters

Connectors

Modelica.Magnetic.QuasiStatic.FluxTubes.Basic.Idle

Idle running branch

Information

This is a simple idle running branch. The magnetic flux through this component is equal to zero.

Extends from FluxTubes.Interfaces.PartialTwoPorts (Partial component with magnetic potential difference between two magnetic ports p and n and magnetic flux Phi from p to n).

Connectors

Modelica.Magnetic.QuasiStatic.FluxTubes.Basic.Short

Short cut branch

Information

This is a simple short cut branch. The magnetic voltage of this component is equal to zero.

Extends from FluxTubes.Interfaces.PartialTwoPorts (Partial component with magnetic potential difference between two magnetic ports p and n and magnetic flux Phi from p to n).

Connectors

Modelica.Magnetic.QuasiStatic.FluxTubes.Basic.Crossing

Crossing of two branches

Information

This is a simple crossing of two branches. The ports port_p1 and port_p2 are connected, as well as port_n1 and port_n2.

Connectors