| 摘要 |
PURPOSE:To obtain a simple control circuit by a method wherein a field magnet is divided into two parts and each pole of four-pole composition is magnetized in such a manner that the center of the magnetization inclines toward the dividing boundary. CONSTITUTION:A main pole 2, an interpole 3, a main pole 4, an interpole 5, a main pole 6, an interpole 7, a main pole 8 and an interpole 9 of a stator 1 are successively arranged and coils 10, 11, 12 and 13 are wound on the respective main poles 2, 4, 6 and 8 so as to make them N-poles. The coils 10 and 12 and the coils 11 and 13 are connected to make two pairs of coils and a power transistor 14 and a power transistor 15 are connected to the coil pair 10 and 12 and to the coil pair 11 and 13 respectively. A rotor 16 is composed as a four-pole rotor by joining two semi-circular two-pole field magnets 17 and 18 in such a manner that two adjacent poles have different polarity. Then the surface flux density of the rotor 16 is regulated in such a manner that the centers of the N- pole of the magnet 17 and the S-pole of the magnet 18 and the centers of the S-pole of the magnet 17 and the N-pole of the magnet 18 incline toward the dividing boundary of the magnet. |
