PermanentMagnetLosses
Model of permanent magnet losses dependent on current and speed
Library
Modelica/Electrical/Machines/Losses/InductionMachines
Description
Permanent magnet losses are modeled dependent on current and speed.
The permanent magnet losses are modeled such way that they do not cause a voltage drop in the electric circuit. Instead, the dissipated losses are considered through an equivalent braking torque at the shaft.
The permanent magnet loss torque is
tau = PRef/wRef * (c + (1 - c) * (i/IRef)^power_I) * (w/wRef)^power_w
where i is the current of the machine and w is the actual angular velocity.
The parameter c designates the part of the permanent magnet losses that are present even at current = 0, i.e. independent of current.
The dependency of the permanent magnet loss torque on the stator current is modeled by the exponent power_I.
The dependency of the permanent magnet loss torque on the angular velocity is modeled by the exponent power_w.
See also
Permanent magnet loss parameters
If it is desired to neglect permanent magnet losses, set strayLoadParameters.PRef = 0 (this is the default).
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_m | m | Number of phases | Scalar | |
mo_permanentMagnetLossParameters | permanentMagnetLossParameters | Permanent magnet loss parameters | FromModelica('Modelica.Electrical.Machines.Losses.PermanentMagnetLossParameters') | |
mo_useHeatPort | useHeatPort | =true, if heatPort is enabled | Number | 0 |
| 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_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_lossPower | lossPower | lossPower | Structure | |
mo_lossPower/fixed | fixed | Cell of scalars | true | |
mo_lossPower/start | start | Cell of scalars | ||
mo_is | is | is | Structure | |
mo_is/fixed | fixed | Cell of vectors | true | |
mo_is/start | start | Cell of vectors | ||
mo_iRMS | iRMS | iRMS | Structure | |
mo_iRMS/fixed | fixed | Cell of scalars | true | |
mo_iRMS/start | start | Cell of scalars |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
flange | implicit | Shaft end | input | 1 |
support | implicit | Housing and support | input | 2 |
Port 3 | implicit | Optional port to which dissipated losses are transported in form of heat | input | mo_useHeatPort |