An electric disc-type rotor machine comprising - at least one rotor and at least one stator at least partially corresponding to said rotor, said at least one rotor and said at least one stator each having a mutually facing end face (14a, 14b; 16a, 16b), wherein - the at least one rotor carries field coils or permanent magnets (→,←) and the at least one stator carries field coils, an air gap is formed between each rotor and each stator, the field coils and/or the permanent magnets (→,←) are aligned and arranged on each rotor or each stator in such a way that the field coils in the current-carrying state and/or the permanent magnets (→,←) are at least temporarily magnetised in the same or opposite direction in such a way that the field coils in the current-carrying state and/or the permanent magnets (→,←) at least temporarily produce magnetic fields in the same or opposite directions, which cause a rotary or relative movement of the rotor with respect to the stator, - each rotor is formed as a circular ring, and the permanent magnets (→,←) are at least partially embedded in each rotor or single-phase or multi-phase conductor tracks are provided as field coils, - each stator is formed as a circular ring lacking at least one circular section, and the field coils of each stator have radially extending portions and portions extending in the inner and outer circumferential directions, characterised in that the sections of the field coils extending in the outer circumferential direction in the region of the lacking circular section of the circular ring have a higher electrical resistance than the sections of the field coils extending in the outer circumferential direction in the region without the lacking circular section of the circular ring. - at least one rotor and at least one stator at least partially corresponding to said rotor, said at least one rotor and said at least one stator each having a mutually facing end face (14a, 14b; 16a, 16b), wherein - the at least one rotor carries field coils or permanent magnets (→,←) and the at least one stator carries field coils, an air gap is formed between each rotor and each stator, the field coils and/or the permanent magnets (→,←) are aligned and arranged on each rotor or each stator in such a way that the field coils in the current-carrying state and/or the permanent magnets (→,←) are at least temporarily magnetised in the same or opposite direction in such a way that the field coils in the current-carrying state and/or the permanent magnets (→,←) at least temporarily produce magnetic fields in the same or opposite directions, which cause a rotary or relative movement of the rotor with respect to the stator, - each rotor is formed as a circular ring, and the permanent magnets (→,←) are at least partially embedded in each rotor or single-phase or multi-phase conductor tracks are provided as field coils, - each stator is formed as a circular ring lacking at least one circular section, and the field coils of each stator have radially extending portions and portions extending in the inner and outer circumferential directions, characterised in that the sections of the field coils extending in the outer circumferential direction in the region of the lacking circular section of the circular ring have a higher electrical resistance than the sections of the field coils extending in the outer circumferential direction in the region without the lacking circular section of the circular ring.