H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02K—DYNAMO-ELECTRIC MACHINES
H02K1/00—Details of the magnetic circuit
H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
H02K1/22—Rotating parts of the magnetic circuit
H02K1/27—Rotor cores with permanent magnets
H02K1/2706—Inner rotors
H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity