EddyCurrentForce

Simple model of a translational eddy current brake

    EddyCurrentForce

Library

Modelica/Mechanics/Translational/Sources

Description

This is a simple model of a translational eddy current brake. The force versus speed characteristic is defined by Kloss' equation.

Thermal behaviour:
The resistance of the braking fin is influenced by the actual temperature Theatport, which in turn shifts the speed v_nominal at which the (unchanged) maximum torque occurs.
If the heatPort is not used (useHeatPort = false), the operational temperature remains at the given temperature T.
However, the speed v_nominal at which the maximum torque occurs is adapted from reference temperature TRef to the operational temperature.

Parameters

EddyCurrentForce_0

NameLabelDescriptionData TypeValid Values

mo_f_nominal

f_nominal

Maximum force (always braking)

Scalar

mo_v_nominal

v_nominal

Nominal speed (leads to maximum force) at reference temperature

Scalar

mo_TRef

TRef

Reference temperature

Scalar

mo_alpha20

alpha20

Temperature coefficient of material

Scalar

mo_useSupport

useSupport

= true, if support flange enabled, otherwise implicitly grounded

Number

0
1

mo_useHeatPort

useHeatPort

=true, if heatPort is enabled

Number

0
1

mo_T

T

Fixed device temperature if useHeatPort = false

Scalar

mo_TheatPort

TheatPort

TheatPort

Structure

mo_TheatPort/fixed

fixed

Cell of scalars

true
false

mo_TheatPort/start

start

Cell of scalars

EddyCurrentForce_1

NameLabelDescriptionData TypeValid Values

mo__nmodifiers

Number of Modifiers

Specifies the number of modifiers

Number

mo__modifiers

Modifiers

Add new modifier

Structure

mo__modifiers/varname

Variable name

Cell of strings

's'
's_support'
'f'
'lossPower'
'v'
'v_normalized'

mo__modifiers/attribute

Attribute

Cell of strings

'start'
'fixed'

mo__modifiers/value

Value

Ports

NameTypeDescriptionIO TypeNumber

flange

implicit

Flange of component

output

1

Port 2

implicit

Support/housing of component

input

mo_useSupport

Port 3

implicit

Optional port to which dissipated losses are transported in form of heat

input

mo_useHeatPort

See Also