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Linear synchronous motor with phase control

  • US 8,224,509 B2
  • Filed: 08/22/2007
  • Issued: 07/17/2012
  • Est. Priority Date: 08/25/2006
  • Status: Expired due to Fees
First Claim
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1. A system for controlling movements of a vehicle along a land-based guideway which comprises:

  • a linear array of targets mounted on the vehicle, wherein the array has a length (l), with a predetermined distance (d) between adjacent targets, wherein the targets of the array are aligned in the direction of vehicle movement;

    a plurality of stationary, in-line, wayside sensors placed along the guideway with a spacing (s) between adjacent sensors;

    a signal processor electronically connected to each sensor to receive a signal therefrom, wherein the signal is indicative of a target being within a predetermined range (r) from a sensor;

    a computer means connected with the signal processor for measuring a time interval (Δ

    t) between successive signals to derive parametric values, based on (Δ

    t) and (d);

    a propulsion unit, wherein operation of the propulsion unit is characterized by a motor phase angle; and

    a controller connected to the computer for receiving the parametric values therefrom, wherein the controller controls the motor phase angle of the propulsion unit, based on the parametric values received from the computer, to control the propulsion of the vehicle.

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