modelCore
Extends from Modelica.Electrical.Analog.Interfaces.OnePort (Component with two electrical pins p and n and current i from p to n), Modelica.Thermal.HeatTransfer.Interfaces.PartialElementaryConditionalHeatPortWithoutT (Partial model to include a conditional HeatPort in order to dissipate losses, used for textual modeling, i.e., for elementary models).
Information
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
| Type | Name | Default | Description |
|---|---|---|---|
| Machines.Losses.CoreParameters | coreParameters | Armature core losses | |
| Boolean | useHeatPort (from PartialElementaryConditionalHeatPortWithoutT) | false | = true, if heatPort is enabled |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| PositivePin | p (from TwoPin) | Positive electrical pin | |
| NegativePin | n (from TwoPin) | Negative electrical pin | |
| HeatTransfer.Interfaces.HeatPort_a | heatPort (from PartialElementaryConditionalHeatPortWithoutT) | Optional port to which dissipated losses are transported in form of heat |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Voltage | v (from TwoPin) | Voltage drop of the two pins (= p.v - n.v) | |
| SI.Current | i (from OnePort) | Current flowing from pin p to pin n | |
| SI.Power | lossPower (from PartialElementaryConditionalHeatPortWithoutT) | Loss power leaving component via heatPort (> 0, if heat is flowing out of component) | |
| SI.AngularVelocity | w | Remagnetization angular velocity | |
| SI.Conductance | Gc | Variable core loss conductance |