A system and method for providing constant-frequency electrical power from
variable-speed mechanical power are disclosed. The system includes a
wound-rotor induction machine generator (WRIMG), a first power converter,
e.g., an inverter or a bridge rectifier, that provides power from the
stator assembly of the WRIMG to the load, and a second power converter,
e.g., an inverter or a bridge rectifier, that provides power from the
rotor assembly of the WRIMG to the load. A controller controls the output
stator-current based on comparisons between measured DC load bus data and
a reference DC load bus voltage value, measured machine shaft angular
position and reference rotor frequency data, and measured stator-current
data that is fed-back to the stator-current controller by the power
converter device(s).