Core
Model of core losses
Library
Modelica/Electrical/Machines/Losses/DCMachines
Description
Core losses can be separated into eddy current and hysteresis losses. The total core losses can thus be expressed as
p = PRef * (ratioHysteresis * (wRef / w) + 1 - ratioHysteresis) * (v / VRef)^2
where w is the actual angular velocity and v is the actual voltage. The term ratioHysteresis is the ratio
of the hysteresis losses with respect to the total core losses for reference inner voltage and reference angular velocity.
For the voltage and angular velocity range with respect to Fig. 1,
the dependency of total core losses on the parameter ratioHysteresis is depicted in Fig. 2.
 |
| Fig. 1: Voltage versus angular velocity |
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Fig. 2: Core losses versus angular velocity with parameter ratioHysteresis |
Note
In the current implementation it is assumed that ratioHysteresis = 0. This parameter cannot be changed due to compatibility reasons.
See also
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_coreParameters | coreParameters | Armature core losses | FromModelica('Modelica.Electrical.Machines.Losses.CoreParameters') | |
mo_useHeatPort | useHeatPort | =true, if heatPort is enabled | Number | 0 |
mo_w | w | Remagnetization angular velocity | Scalar |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_v | v | v | Structure | |
mo_v/fixed | fixed | Cell of scalars | true | |
mo_v/start | start | Cell of scalars | ||
mo_i | i | i | Structure | |
mo_i/fixed | fixed | Cell of scalars | true | |
mo_i/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_Gc | Gc | Gc | Structure | |
mo_Gc/fixed | fixed | Cell of scalars | true | |
mo_Gc/start | start | Cell of scalars |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
p | implicit | Positive electrical pin | input | 1 |
n | implicit | Negative electrical pin | output | 1 |
Port 3 | implicit | Optional port to which dissipated losses are transported in form of heat | input | mo_useHeatPort |