2- - DC TWO-POLE BRUSH-COMMUTATED DC ELECTRIC MOTOR

摘要

The present invention relates to a two-pole brush-commutated DC electric motor, comprising: a stator; and a rotor. The rotor comprises: a hollow cylindrical winding without an iron core having n units of coil pieces; and a commutator having n units of commutator pieces. Each of the coil pieces is electrically connected to two neighboring commutator pieces. A gravity shaft, which vertically crosses the rotor shaft and passes through the gravity center of the coil pieces, or the central line of the coil pieces, which passes through the gravity center, and the rotor shaft are over a coil plane, which limits the angle position of the related coil pieces. Two brush contact surfaces of the commutator pieces, which are electrically connected to the coil pieces, are distanced from each other. A distance bisector vertically crosses the rotor shaft. The distance bisector and the rotor shaft are over a commutator plane, which limits the angle position of the related commutator pieces. N is a natural number. To achieve this purpose, a coil plane of the coil pieces is placed by rotating for a correction angle, which is greater than 45 but less than 135, around the rotor shaft toward the commutator plane of the related commutator pieces. Further, the present invention relates to such a rotor.