| 摘要 |
PURPOSE:To reduce power consumption by obtaining the speed of passage of a stator before a carrier advances to each stator and deciding the necessity of the control of the stator. CONSTITUTION:A travel indication control section 6 indicates a travel pattern to a system controller Sc so that a carrier is made to travel to a stator Stn from a stator St1. When the number of the stators St1-Stn is smaller than a fixed value A, a travel command is transmitted over the stators St2-Stn at that time. When the number of the stators is larger than A, when there are two or more of the stators travelling in the vicinity of synchronous speed, approach speed and escape speed are calculated about all of the stoppage stator Stn from the starting stator St1. When there are two or more of continuous stators in which approach speed and escape speed are larger than predetermined indicating speed, commands to every other stator are omitted. |
