Harmonic Current Suppression of the Semicontrolled OW-PMSG Systems by Eliminating the Current Zero-Crossing Duration

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In this paper, a modified semi-controlled open-winding permanent magnet synchronous generator (OW-PMSG) system is established by combining fully-controlled converter and semi-controlled rectifier, and a novel two-mode control strategy is proposed to suppress the harmonic current caused by the current zero-crossing duration. Firstly, the modeling and typical control strategy of conventional semi-controlled OW-PMSG system are introduced. Then, the source of the long current zero-crossing duration of the conventional semi-controlled OW-PMSG system is analyzed. On this basis, this paper introduces in detail how the modified semi-controlled OW-PMSG system using the proposed control strategy eliminates the current zero-crossing duration and achieves harmonic current suppression. Finally, the effectiveness and superiority of the modified topology and proposed control strategy have been verified through experiments.