.Modelica.Magnetic.QuasiStatic.FundamentalWave.Losses.StrayLoad .Modelica.Magnetic.QuasiStatic.FundamentalWave.Losses.StrayLoadStray load losses are modeled similar to standards EN 60034-2 and IEEE 512, i.e., they are dependent on square of current, but without scaling them to zero at no-load current.
For an estimation of dependency on varying angular velocity see: [Lang1984]
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).