| 摘要 |
PURPOSE:To obtain specified output in a wide rotational-frequency range with a miniature and low output motor, by changing the number of windings according to rotational frequency. CONSTITUTION:When a motor is used at low-speed rotation, then all part- windings 2, 3 are connected in series. When the motor is used with high-speed rotation, then all of the windings 2, 3 are connected in parallel with each other. In this manner, in a low-speed rotation range, with the number of more windings, output in the low speed range is made greater, and in a high-speed rotation range, with the number of fewer windings, maximum output in the high-speed rotation range is contrived to be obtained. Accordingly, with a miniature and low output motor, specified output can be obtained in a wide rotational-frequency range. |
