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Non-saturable induction machine with slip-ring rotor.
Machines
This model of a slip-ring induction machine can only be used with the continuous state-space method. If you want to use the discrete state-space method or if you need to take saturation into account, please use the Saturable Induction Machine.
The machine model is based on a stationary reference frame (Clarke transformation). A sophisticated implementation of the Clarke transformation facilitates the connection of external inductances in series with the stator windings. However, external inductors cannot be connected to the rotor windings due to the current sources in the model. In this case, external inductors must be included in the leakage inductance of the rotor.
The machine operates as a motor or generator; the sign of the mechanical torque determines the mode of operation (positive for motoring, negative for generating). All electrical variables and parameters are viewed from the stator side. In the component icon, phase a of the stator and rotor windings is marked with a dot.
In order to inspect the implementation, please select the component in your circuit and choose Look under mask from the Edit menu. If you want to make changes, you must first choose Break library link and then Unprotect, both from the Edit menu.
The three-phase voltages and
at the stator terminals are
transformed into dq quantities:
Likewise, the stator currents in the stationary reference frame are transformed back into three-phase currents:
Similar equations apply to the voltages and currents at the rotor terminals with
being the electrical rotor position:
Electromagnetic torque:
Mechanical rotor speed :
Mechanical rotor angle :
The output vector "m" contains the following 3 signals: