×

Air gap controlling system for linear motor

  • US 5,115,173 A
  • Filed: 07/25/1991
  • Issued: 05/19/1992
  • Est. Priority Date: 07/30/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. An air gap controlling system for a linear motor which is constituted from a truck-carried element mounted on each of a plurality of trucks of each of a plurality of rolling stocks of a train and a plurality of ground-mounted elements secured to the ground along a running route of said trucks, comprising:

  • driving means for driving each of the truck-carried elements to be displaced upwardly or downwardly;

    velocity detecting means for detecting a running speed of said rolling stocks;

    truck position signal generating means for generating a truck position signal indicative of a position of each of the trucks in said train;

    air gap aimed value setting means provided on each of said trucks for setting an aimed value of an air gap between each of the truck-carried elements of each of said trucks and an opposing ground-mounted element in response to outputs of the corresponding velocity detecting means and the corresponding truck position signal generating means;

    air gap detecting means provided for each of the driving means for detecting an air gap between the corresponding truck-carried element and an opposing ground-mounted element;

    controlling means provided for each of said driving means for controlling the driving means in response to an air gap instruction value and an output of a detected air gap of the corresponding air gap detecting means so that the detected air gap may be equal to the air gap instruction value;

    air gap error detecting means provided on a first one of said trucks for detecting an air gap error between an air gap aimed value from the corresponding air gap aimed value setting means and a detected air gap from the corresponding air gap detecting means;

    the air gap aimed value from the air gap aimed value setting means on the first truck being provided as an air gap instruction value to the controlling means for the first truck to effect control of an air gap of the first truck;

    point information generating means for generating information of a point where each of the truck-carried elements passes along the running route;

    weight detecting means for detecting a weight of each of said rolling stocks;

    forecasting signal generating means for generating forecasting signals from a relation of an air gap error from said air gap error detecting means to a detected velocity from said velocity detecting means and detected weights from the weight detecting means;

    storage means for storing therein forecasting signals from said forecasting signal generating means in a corresponding relationship to point information from said point information generating means; and

    correcting means provided on those of said trucks succeeding to said first truck for correcting air gap aimed values from the air gap aimed value setting means provided on the succeeding trucks with forecasting signals from said storage means corresponding to points at which the succeeding trucks run and for providing the thus corrected air gap aimed values as air gap instruction values to the controlling means for the succeeding trucks.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×