Patent ID: 8593019

Claim:
An electric machine, comprising: a stator; a mover configured to move in a linear or a curved manner or to rotate around the stator, the mover having a plurality of mover teeth; a plurality of toothed mover protrusions and a plurality of permanent magnets alternately provided on an end of each of the mover teeth, such that the permanent magnets have the same polarity and at least one of left and right edges of each of the mover teeth includes a permanent magnet; and phase coils respectively wound around the mover teeth such that an electric phase difference between the phase coils of adjacent mover teeth is 180°, wherein a number of coil phases is n (n denotes a natural number), the mover teeth or modular movers each having two mover teeth are arranged at electrical intervals of 180°/n, and a number of the mover teeth or the modular movers is an exact multiple of n.