EddyCurrentTorque
Simple model of a rotational eddy current brake
Library
Modelica/Mechanics/Rotational/Sources
Description
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
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_tau_nominal | tau_nominal | Maximum torque (always braking) | Scalar | |
mo_w_nominal | w_nominal | Nominal speed (leads to maximum torque) 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 |
mo_useHeatPort | useHeatPort | =true, if heatPort is enabled | Number | 0 |
mo_T | T | Fixed device temperature if useHeatPort = false | Scalar |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_phi | phi | phi | Structure | |
mo_phi/fixed | fixed | Cell of scalars | true | |
mo_phi/start | start | Cell of scalars | ||
mo_lossPower | lossPower | lossPower | Structure | |
mo_lossPower/fixed | fixed | Cell of scalars | true | |
mo_lossPower/start | start | Cell of scalars | ||
mo_TheatPort | TheatPort | TheatPort | Structure | |
mo_TheatPort/fixed | fixed | Cell of scalars | true | |
mo_TheatPort/start | start | Cell of scalars | ||
mo_tau | tau | tau | Structure | |
mo_tau/fixed | fixed | Cell of scalars | true | |
mo_tau/start | start | Cell of scalars | ||
mo_w | w | w | Structure | |
mo_w/fixed | fixed | Cell of scalars | true | |
mo_w/start | start | Cell of scalars | ||
mo_w_normalized | w_normalized | w_normalized | Structure | |
mo_w_normalized/fixed | fixed | Cell of scalars | true | |
mo_w_normalized/start | start | Cell of scalars |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
flange | implicit | Flange of shaft | 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 |