| 摘要 |
PURPOSE:To reduce the wt. of a car body, by controlling the sucking force of the car body as well as thrust by electromagnets divided into a plurality of ones. CONSTITUTION:A plurality of electromagnets 25 divided are mounted to a stand 24 of a car 23, and armatures 26 are wound on the electromagnets. Displacement meters 301-304 are installed to the stand, void length control circuits 291-294 are actuated by the detecting signals, current to each electromagnet 251-254 is controlled, and the current of the armatures 261-262 is controlled, thus adjusting sucking force. The output signals of a frequency control circuit 391 are transmitted to an inverter 27, and the frequency of the armatures 261, 262 is changed, thus controlling thrust. The frequency control circuit is arranged by a circuit 40 for generating the pulse of number being proportioned to the speed of the movement of the car body 23, a reference pulse generating circuit 41, a counter 42, a ring counter 43, a logic circuit 44 and a gate circuit 45. |
