| 摘要 |
PURPOSE:To reduce the inductance of exciting coils, by setting all the teeth of the phase to be the same poles, when one phase of a brushless motor having two slots or more per phase on a stator is excited. CONSTITUTION:On the inner peripheral surface of a rotor yoke 1 made of cup-formed magnetic substance organizing a rotor, a permanent magnet 4 is fitted so that the poles N, S may be alternately arranged. The stator core 2 of magnetic substance forming a stator is wound up with exciting coils 3a, 3b of one phase among three phases. The coils 3a, 3b are connected in series, but each slot is wound up in the opposite directions. By respective excited teeth, the same poles are generated at the same time, and the magnetic path is divided, and different loops are formed with magnetic flux phi1, phi2. By this method, the inductance of the exciting coils 3a, 3b is set to be 1/2, and a motor can be prevented from receiving a bad influence due to inductance on the start and stop. |
