CoreModel of core losses 
This information is part of the Modelica Standard Library maintained by the Modelica Association.
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 remagnetization 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 the reference voltage and frequency.
In the current implementation hysteresis losses are not considered since complex numbers are not provided in Modelica.
Therefore, implicitly ratioHysteresis = 0
is set. For the voltage and frequency range with respect to Fig. 1,
the dependency of total core losses on the parameter ratioHysteresis
is depicted in Fig. 2.
The current implementation has thus the drawback over a model that considers ratioHysteresis > 0
:
w
< wRef
)w
> wRef
)Fig. 1: Voltage versus angular velocity 
Fig. 2: Core losses versus angular velocity with parameter ratioHysteresis 
In the current implementation it is assumed that ratioHysteresis = 0
. This parameter cannot be changed due to compatibility reasons.
useHeatPort 
Value: false Type: Boolean Description: =true, if heatPort is enabled 

coreParameters 
Value: Type: CoreParameters 
turnsRatio 
Value: Type: Real Description: Effective number of stator turns / effective number of rotor turns (if used as rotor core) 
w 
Type: AngularVelocity (rad/s) Description: Remagnetization angular velocity 

heatPort 
Type: HeatPort_a Description: Optional port to which dissipated losses are transported in form of heat 


spacePhasor 
Type: SpacePhasor 
coreParameters 
Type: CoreParameters 

Modelica.Electrical.Machines.BasicMachines.AsynchronousInductionMachines Asynchronous induction machine with slipring rotor 

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