Modelica.Magnetic.FluxTubes.Examples.Utilities

Information

Package Content

Name	Description
TranslatoryArmatureAndStopper	Mass with free travel between two stoppers
CoilDesign	Calculation of winding parameters (wire diameter, number of turns et al.) and recalculation with optionally chosen parameters; to be adapted to particular design tasks

Modelica.Magnetic.FluxTubes.Examples.Utilities.TranslatoryArmatureAndStopper

Information

In translatory actuators with limited stroke, the armature with its inertia can travel between two stoppers.

Parameters

Name	Description
L	Length of component from left flange to right flange (= flange_b.s - flange_a.s) [m]
m	Armature mass [kg]
c	Spring stiffness between impact partners [N/m]
d	Damping coefficient between impact partners [N.s/m]
n	Exponent of spring forces (f_c = c*|s_rel|^n)
x_max	Position of stopper at maximum armature position [m]
x_min	Position of stopper at minimum armature position [m]

Connectors

Name	Description
flange_a
flange_b

Modelica.Magnetic.FluxTubes.Examples.Utilities.CoilDesign

Information

This model example shows dimensioning of a winding (wire diameter, number of turns) based on desired operating conditions (voltage, temperature, current density, conductor filling factor) for a given cross-section area of the winding. It can be modified according to the parameters given and sought after for a particular design project.

The calculated winding resistance and number of turns can be used as input parameters to the electrical subsystem of a device to be modelled. Operating voltage V_op can be minimum, nominal and maximum voltage respectively as specified for a particular design project. In conjunction with the setting of the operating temperature T_op, this enables for analysis of the device under worst-case conditions (e.g., minimum required magnetomotive force, maximum allowed ohmic losses, minimum and maximum force respectively).

For manufacturing of a winding, the obtained wire diameter d_wireCalculated must be rounded to that of an available wire. In order to analyse the influence of this rounding, one can enter the chosen wire diameter d_wireChosen and number of turns N_chosen as optional input. Calculation of the resulting winding parameters enables for comparison with the ones obtained otherwise.

Parameters

Name	Description
rho_20	Resistivity of conductor material at 20 degC (default: Copper) [Ohm.m]
alpha_20	Temperature coefficient of conductor material's resistivity at 20 degC (default: Copper) [1/K]
T_op	Operating temperature of winding [K]
h_w	Height of winding cross-section [m]
b_w	Width of winding cross-section [m]
l_avg	Average length of one turn [m]
V_op	Operating voltage (nominal/ minimum/ maximum voltage depending on design objective) [V]
J_desired	DESIRED current density at operating temperature and voltage resp. [A/m2]
c_condFillChosen	CHOSEN conductor filling factor = total conductor area without insulation/ total winding area
Chosen feasible parameters (optional)
d_wireChosen	CHOSEN available wire diameter (without insulation) [m]
N_chosen	CHOSEN number of turns