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Supply system for an electric traction vehicle

  • US 6,294,886 B1
  • Filed: 08/30/1999
  • Issued: 09/25/2001
  • Est. Priority Date: 08/28/1998
  • Status: Expired due to Term
First Claim
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1. Supply system for an electric traction vehicle comprising:

  • electric traction motors supplied by a traction system and pantograph means (2) for connecting the traction system to a catenary;

    an autonomous supply device carried on board the vehicle comprising;

    a kinetic accumulation of energy system having a rotating machine with a rotor forming a flywheel operable either as a motor or as a generator; and

    a backup reserve system which can be selectably connected either to a main electrical supply to allow recharging of the backup reserve system or to the traction system to supply power to the traction system in a degraded mode, the backup reserve system comprising a traction battery, a charger adapted to charge the traction battery from the main electrical supply, and means for switching the backup reserve system to one of the main electrical supply and the traction system; and

    means for connecting the kinetic accumulation of energy system during charging to the main electrical supply during stoppages of the vehicle in stations, and for connecting the kinetic accumulation of energy system to the traction system during discharging;

    wherein said kinetic accumulation of energy system is a system for recovering braking energy of the vehicle, said supply system further comprising;

    means for managing energy of the kinetic accumulation of energy system to enable the vehicle to make best use of the energy of said system so as to enable the vehicle to travel between recharging from the main electrical supply in two successive stations, a sensor of current drawn by the kinetic accumulation of energy system and fed to the traction system, tachometer means for determining a speed of rotation of at least two of the electric traction motors of the vehicle and a distance traveled by the vehicle, and a sensor of the speed of the flywheel of the rotating machine of the kinetic accumulation of energy system associated with said management means;

    wherein said management means comprises an on-board central computer linked by an on-board computerized network to an electronic control circuit of the traction system and an electronic control circuit of the kinetic accumulation of energy system;

    wherein the on-board central computer of the vehicle contains speed values corresponding to amounts of energy remaining to be provided until a next stoppage of the vehicle in a station, said energy values being compared with energy still available in the kinetic accumulation of energy system so as to deliver, to the traction system, speed limitation preset instructions when the vehicle is in the traction state.

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