StrayLoadModel of stray load losses dependent on current and speed 
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Stray load losses are modeled similar to standards EN 600342 and IEEE 112, i.e., they are dependent on square of current, but without scaling them to zero at noload current.
For an estimation of dependency on varying angular velocity see:
W. Lang, Über die Bemessung verlustarmer Asynchronmotoren mit Käfigläufer für Pulsumrichterspeisung,
Doctoral Thesis, Technical University of Vienna, 1984.
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.
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
.
If it is desired to neglect stray load losses, set strayLoadParameters.PRef = 0
(this is the default).
useHeatPort 
Value: false Type: Boolean Description: =true, if heatPort is enabled 

strayLoadParameters 
Value: Type: StrayLoadParameters Description: Stray load loss parameters 
plug_p 
Type: PositivePlug Description: Positive polyphase electrical plug with m pins 


plug_n 
Type: NegativePlug Description: Negative polyphase electrical plug with m pins 

flange 
Type: Flange_a Description: Shaft end 

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 
strayLoadParameters 
Type: StrayLoadParameters Description: Stray load loss parameters 

Modelica.Electrical.Machines.Interfaces Partial model for induction machine 

Modelica.Magnetic.FundamentalWave.Interfaces Partial model for induction machine 