Comparison of Magnetic Noise Compensation Techniques for Dual Three-Phase Electrically Excited Synchronous Machines

This paper presents a detailed comparison of two commonly known magnetic noise compensation meth-ods. One is based on forces generated by harmonic currents interacting with the fundamental field, while the other uses a harmonic field. Both methods are applied to dual three-phase electrically excited synchronous machines. The required compensation currents and parasitic effects, such as the induced voltage in the field winding, are compared. Furthermore, known precalculation methods are adapted to dual three-phase electrically excited synchronous machines and validated with FEM calculations.