Direct Current Control (DCC) of DI-WRIM Drive

This paper explores the rotor field-oriented control (RFOC) operation of the Double-Inverter-fed Wound Rotor Induction Machine (DI-WRIM) drive to improve its dynamic performance. It proposes a simple, less parameter-dependent, Direct Current Control (DCC) on the rotor-flux oriented $dq$-components of stator currents directly using 3L-hysteresis comparators from the stator side and V/f-type control from the rotor side of the DI-WRIM drive. The hysteresis control on the stator side has been improved using the virtual voltage vector concept. The hysteresis controller on the stator side tightly controls the electromagnetic torque developed in the machine, and the V/f type controller regulates rotor flux and frequency. The proposed control algorithm is validated with simulation and results for a 3KW DI-WRIM drive setup.