Permanent magnet energized motor with rotatable bar magnets

An electrical machine comprising:

• a rotor and a stator surrounding the rotor,
• wherein the rotor and the stator are spaced apart from each other in a radial direction in order to form an air gap therebetween,
• wherein the electrical machine comprises an axis of revolution about which the rotor is rotatable,
• wherein the rotor has a rotor body and an outer casing surface which delimits the rotor,
• wherein the rotor comprises at least one pole arrangement,
• wherein the at least one pole arrangement comprises a magnetic and/or magnetizable pole,
• wherein the magnetic and/or magnetizable pole of the pole arrangement is formed so as to be rotatable relative to the stator and the rotor, and
• wherein at least three pole arrangements have different distances from the outer casing surface of the rotor, wherein only two of the at least three pole arrangements with the smallest distance from the outer casing surface are movable about a respective rotation axis.