Modeling and performance of novel scheme dual winding cage rotor variable speed induction generator with DC link power delivery

In an effort to reduce the initial cost of a cage-rotor (robust) variable speed induction generator with full (100%) power PWM inverter, for a dc link local power bus, a novel dual stator winding configuration with a 50% rating PWM inverter and a capacitor and 50% diode rectifier (for additional active power delivery at high speeds capable of soft-starting and low speed operation) is proposal in this paper. Machine circuit modeling with performance assessment for steady state and a circuit model for system feed forward controlled dynamics are proposed and backed up by numerical power and efficiency versus speed results. Preliminary experiments on a purposely built prototype already validate the essentials.