Analysis and modeling of the steady state behavior of the static Kramer induction generator

A steady state analysis of the static Kramer variable speed double output induction generator is conducted using a hybrid dq model wherein stator variables only are transformed onto a reference frame fixed to the rotor. Rotor variables are retained in their natural abc form, allowing diode bridge overlap together with switching effects in the rectifier and inverter to be catered for. For constant speed operation, the system equations are reduced to a set of linear differential equations with constant coefficients which are solved analytically to predict generator performance. Simulated performance is verified experimentally showing very good agreement with measurement.