Electrical machine i.e. electric motor, for use in electrical drive of e.g. automobile vehicle, has rotor with magnets for producing magnetic excitation field and adjustment unit adjusting field strength and flow density of stator portion

摘要

The machine (1) has a stator (2) provided with fixed windings and a rotor (3) that comprises permanent magnets (6) for producing a magnetic excitation field, where stator voltage is induced by a stator portion of the excitation field in the fixed windings. The rotor comprises an adjustment unit for adjusting magnetic field strength and/or a flow density of the stator portion. The adjustment unit is designed as a magnetic auxiliary field production unit, where resulting excitation field is generated by an overlay of the excitation field and auxiliary field. An independent claim is also included for a method for adjusting a magnetic field strength and/or a flow density of a stator portion of an excitation field of an electrical machine.