VECTOR CONTROL WITH OPTIMAL TORQUE OF A SALIENT-POLE DOUBLE STAR SYNCHRONOUS MACHINE SUPPLIED BY THREE-LEVEL INVERTERS

Lazhari Nezli – Mohand Oulhadj Mahmoudi

   This work relates to the study of the vector control of the salient-pole double star synchronous machine drive (DSSM) fed by three-level inverters which are controlled by PWM hysteresis strategy. Indeed, it is a question of carrying out a decoupling between rotor flux and electromagnetic torque, by introducing a vector control with an optimal torque working and by imposing constant flux regime. Furthermore, to ensure a decoupled dynamic behavior of the machine as in the case of a DC machine, a regulation of the rotor current has been introduced through a chopper operating at 5 kHz chopping frequency, feeding the excitation circuit. The obtained results are very satisfactory and reveal the effectiveness of the proposed approach.

Keywords: salient-pole double star synchronous machine, tree-level inverter, decoupled control, optimal torque working, speed regulation

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