Direct Q-axis flux linkage control for permanent magnet synchronous generator

DC power technology of permanent magnet synchronous generator (pMSG) has been used widely in aircraft, car and so on. However, DC output voltage ripple of PMSG are large in traditional direct torque control (DTC). The output voltage ripple is mainly due to large torque ripple generator. To reduce the ripple, a novel direct q-axis flux linkage control method is proposed. This method selects the optimized voltage vector according to the torque control requirement directly. Moreover, the stator flux linkage control loop and complex coordinate transformation are eliminated simultaneously. The correction and feasibility of the proposed method is verified by the simulation results.