Brushless motor using vernier structure

A brushless motor comprising: a rotor having a magnet, the magnet alternately magnetized N and S poles in the rotational direction; and a plurality of salient poles wound with the coil core. The core facing the magnet to form a magnetic circuit. Each salient pole and a small tooth serrations formed at the edge face of the magnet. The small teeth and the magnet has two poles corresponding to the pitch. In response to the position of the rotor to drive the rotor by powering a coil. This structure greatly increases the volumetric efficiency of the motor.