BRUSH-COMMUTATED DC ELECTRIC MOTOR WITH IMPROVED VIBRATION BEHAVIOUR

摘要

The present invention relates to a brush-commutated DC electric motor, having a stator, which comprises a permanent magnet with a number p of pole pairs, and having a rotor, which can rotate in relation to the stator and has a hollow-cylindrical iron-free winding with a geometric axis and a number Q of sub-coils, and also has a collector with a number K of collector laminations, wherein the sub-coils are arranged distributed over the periphery of the rotor, and wherein the brush-commutated DC electric motor further has at least one pair of brushes which are in contact with the collector and by means of which the sub-coils are energized. According to the invention, provision is made for the arrangement of the brushes and the interconnection of the sub-coils to be selected in such a way that in each case a number n≥2 of sub- coils, which each are 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.