WOLFRAM SYSTEM MODELER
StrayLoadModel of stray load losses dependent on current and speed |
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Wolfram Language
In[1]:=
SystemModel["Modelica.Electrical.Machines.Losses.DCMachines.StrayLoad"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
The stray load loss torque is
tau = PRef/wRef * (i/IRef)^2 * (w/wRef)^power_w
where i is the current of the machine and w is the actual angular velocity.
The dependency of the stray load torque on the angular velocity is modeled by the exponent power_w.
The stray load 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.
See also
If it is desired to neglect stray load losses, set strayLoadParameters.PRef = 0 (this is the default).
Parameters (2)
| useHeatPort |
Value: false Type: Boolean Description: = true, if heatPort is enabled |
|---|---|
| strayLoadParameters |
Value: Type: StrayLoadParameters Description: Stray load loss parameters |
Connectors (5)
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p |
Type: PositivePin Description: Positive electrical pin |
|---|---|---|
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n |
Type: NegativePin Description: Negative electrical pin |
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flange |
Type: Flange_a Description: Shaft end |
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support |
Type: Flange_a Description: Housing and support |
 |
heatPort |
Type: HeatPort_a Description: Optional port to which dissipated losses are transported in form of heat |
Components (1)
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strayLoadParameters |
Type: StrayLoadParameters Description: Stray load loss parameters |
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Used in Components (1)
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Modelica.Electrical.Machines.Interfaces Partial model for DC machine |