Abstract
A steady-state theory of the doubly-fed induction machine is presented, according to the rotor flux reference frame. The choice of such a reference frame is particularly suitable when a rotor current control is adopted. Active and reactive power flows at the stator and rotor terminals are derived, showing their dependence on the rotor current components. Therefore, such a model is well suited for the system simulation as well as for machine design calculations. © 2011 IEEE.