Patent ID: 7638983
Filing Date: 2009-12-29
Classification: H02M,H02P

Abstract:
1. A controller for controlling a doubly-fed induction generator having a stator coil coupled to a three-phase grid coil through a switch and a rotor coil as a control coil, comprising: a H-bridge multi-level converter having a multi-level topology that single-phase converters each composed of a 2-leg insulated-gate bipolar transistor (IGBT) are stacked in a serial manner, generating a three-phase voltage waveform, and controlling a rotor current so as to allow a rotor coil of the doubly-fed induction generator to be in charge of a slip power only; and a boost converter composed of a 3-leg IGBT and a boost inductor generating a direct current voltage of its source required for the H-bridge multi-level converter.