Abstract: A rotary electric apparatus functions as either a generator or a motor and has a rotary shaft defining an axial direction and a stator disposed around an external periphery of the rotary shaft. The stator has coil assemblies including coils wound around core members extending parallel to the axial direction and equidistantly disposed about the rotary shaft. The core members have opposing first and second stator pole surfaces normal to the axial direction and disposed respectively in opposing first and second sides of the stator. A first monopole rotor is fixed on the rotary shaft adjacent the first side of the stator and has all N-polar magnetic pole surfaces normal to the axial direction, disposed diametrically opposed about the rotary shaft, and alignable opposite the first stator pole surfaces during rotation of the first monopole rotor.

Abstract: An induction generator having a pair of magnetic poles of the same polarity opposed to each other with respect to a rotation shaft is characterized by a high energy conversion efficiency.