| 摘要 |
PURPOSE:To simplify the structure of a stator and a winding by forming each magnetic pole for the stator to the same shape and at the intervals of equal angles and fitting a pole shoe projecting toward the pole face of the stator at a position displaced from the center of one pole of a permanent magnet to one pole of the permanent magnet. CONSTITUTION:A pole shoe 12 projecting toward the pole face 6c of a stator 5 is mounted where displaced from the center of the circumference of one pole of a permanent magnet 2 to one pole of the permanent magnet 2. Consequently, magnetic flux is transferred concentrically between the permanent magnet 2 and the pole face. According to said constitution, not only self-starting in one direction is enabled but also reverse revolving torque by reluctance torque is made weaker than conventional devices in cooperation with the shape of the stator with no magnetic pole having extremely thin width, thus simplifying the structure of the stator and a winding, such as the smoothness of operation at low speed, the drop of starting voltage, etc., then allowing miniaturization. |
