| 摘要 |
PURPOSE:To smooth rising and shorten a transit time by a method wherein the stator of low synchronous speed and the stator of high synchronous speed are by turns arranged while the stator of the low synchronous speed of the stator is excited according to the transit speed of a carrier. CONSTITUTION:Stators 21a, 21c, 21e and 21g set at low synchronous speed V1 and stators 21b, 21d and 21f set at high synchronous speed V2 are by turns arranged. Stators 21b, 21d and 21f are excited when a carrier 23 is opposed, while stators 21a, 21c, 21e and 21g are excited only when the carrier 23 are shifting at the lower speed than the snychronous speed V1. Thereby it rises smoothly at the initial departure and accelerates en route thus to shorten the transit time. |
