This information is part of the Modelica Standard Library maintained by the Modelica Association.
Stray 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
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
If it is desired to neglect stray load losses, set
strayLoadParameters.PRef = 0 (this is the default).
Description: =true, if heatPort is enabled
Description: Stray load loss parameters
Description: Positive quasi-static polyphase plug
Description: Negative quasi-static polyphase plug
Description: Shaft end
Description: Housing and support
Description: Optional port to which dissipated losses are transported in form of heat
Partial model for quasi static multi phase machines