Brush-commutated DC electric motor with an improved oscillation behavior

A brush-commutated DC electric motor having a stator comprising a permanent magnet, having a number p of pole pairs, and having a rotor rotatable with respect to the stator, which has a hollow-cylindrical iron-free winding with a geometric axis and a number Q of sub-coils, and a collector with a number K of collector segments, wherein the sub-coils are arranged distributed over the periphery of the rotor, and wherein the brush-commutated DC electric motor furthermore has at least one pair of brushes which are in contact with the collector and by means of which the sub-coils are energized, wherein the arrangement of the brushes and the interconnection of the sub-coils are selected in such a way that in each case a number n≥2 of sub-coils, which are each arranged offset by 360°/n in a rotationally symmetrical manner with respect to the axis of the rotor, are always supplied with the same current at the same time, wherein the number p of pole pairs is greater 1, wherein the collector has a number K=k·p of collector segments, wherein k is an uneven number ≥3, wherein the number Q of sub-coils is q·p, wherein the number q either corresponds to the number k or to the double of the number k, and wherein the number n of the sub-coils which are each arranged in a rotationally symmetrical manner with respect to each other and are each energized at the same time corresponds to the number p, if q=k, or the double of p, if q=2·k, and wherein a number p of collector segments, which are also each arranged offset by 360°/p in a rotationally symmetrical manner with respect to the axis of the rotor, are connected to each other in a conductive manner on the rotor side.