An electric machine (1) has a stator (2) with a stator body (3) and a stator winding (4) and a rotor (5) rotatably disposed with respect to the stator and having a rotor body (6) with a plurality of permanent magnets received therein. The rotor is disposed with an air gap (14) between the rotor body and the stator body and to make a magnetic flux to pass between the permanent magnets of the rotor body and stator poles of the stator body through this air gap. The machine further comprises at least one member (15, 16) or an agent of a material having a high magnetic permeability configured to be positioned with respect to the stator body (6) so as to reduce the magnetic flux (A) from the permanent magnets through said air gap.