A Novel Consequent-Pole Contra-Rotating Machine With Zero-Sequence Current Excitation

A novel hybrid excitation consequent-pole contra-rotating machine (CRM) with zero-sequence current excitation is presented in this article. The stator windings carry both the dc field winding current and the ac armature current, making the machine more compact. Further, the flux can be weakened or enhanced without the risk of demagnetization by controlling the zero-sequence current excitation in the integrated winding. Finally, the segmented stator can effectively reduce iron loss and simplify manufacture processing.