WOLFRAM SYSTEMMODELER

EddyCurrentTorque

Simple model of a rotational eddy current brake

Wolfram Language

In[1]:=
SystemModel["Modelica.Mechanics.Rotational.Sources.EddyCurrentTorque"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

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

Thermal behaviour:
The resistance of the braking disc is influenced by the actual temperature Theatport, which in turn shifts the speed w_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 w_nominal at which the maximum torque occurs is adapted from reference temperature TRef to the operational temperature.

Parameters (7)

useSupport

Value: false

Type: Boolean

Description: = true, if support flange enabled, otherwise implicitly grounded

useHeatPort

Value: false

Type: Boolean

Description: =true, if heatPort is enabled

T

Value: 293.15

Type: Temperature (K)

Description: Fixed device temperature if useHeatPort = false

tau_nominal

Value:

Type: Torque (N·m)

Description: Maximum torque (always braking)

w_nominal

Value:

Type: AngularVelocity (rad/s)

Description: Nominal speed (leads to maximum torque) at reference temperature

TRef

Value:

Type: Temperature (K)

Description: Reference temperature

alpha20

Value:

Type: LinearTemperatureCoefficient20 (¹/K)

Description: Temperature coefficient of material

Connectors (3)

flange

Type: Flange_b

Description: Flange of shaft

support

Type: Support

Description: Support/housing of component

heatPort

Type: HeatPort_a

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

Used in Examples (1)

EddyCurrentBrake

Modelica.Mechanics.Rotational.Examples

Demonstrate the usage of the rotational eddy current brake