VARIABLE MAGNETIC FLUX-TYPE ROTARY ELECTRIC MACHINE

摘要

A variable magnetic flux-type rotary electric machine includes a stator (11) and a rotor (12). The stator (1 1) includes a stator coil (C) wound on teeth. The rotor (12) defines an air gap between the rotor (12) and the stator (1 1). The rotor (12) has at least one permanent magnet (m) arranged in the d-axis magnetic path. The stator (11) and the rotor (12) are arranged relative to the permanent magnet (m) to set a characteristic of d(Kt(I))/dI≥0 in a range of at or below magnetic saturation of a core material of at least one of the stator (11) and the rotor (12), where KT represents a torque constant, and I represents an applied current, and a function of KT with respect to I is represented by KT = Kt(I) for a torque Tr acting on the rotor (12) that is represented by Tr = KT x I.