Ground level power supply system for a non-guided vehicle
The inventive system, of the conduction type, comprises: a pair of power supply tracks, comprising a so-called live conductive track ( 11 ), designed to be electrically connected to a voltage source, and a so-called neutral conductive track ( 12 ), for the current return, designed to be electrically connected to a reference potential (V ref ), the neutral track traveling parallel to the live track on a first side thereof; and a protective conductive track ( 13 ), designed to be connected to a ground potential, the protective track traveling parallel to the live track ( 11 ) on a second side thereof, opposite the first side. The system is installed in a roadway such that the live, neutral and protective conductive tracks are flush with a surface ( 18 ) of the roadway ( 2 ).
1. A ground level power supply system for non-guided electric vehicles, of the conduction type, comprising:
a pair of power supply tracks, comprising a live conductive track, designed to be electrically connected to a voltage source, and a neutral conductive track, for the return of the current, designed to be electrically connected to a reference potential, the neutral track traveling parallel to the live track on a first side thereof; and
a protective conductive track, designed to be connected to a ground potential, the protective track traveling parallel to the live track on a second side thereof, opposite the first side;
the live, neutral and protective conductive tracks being supported on a support assembly designed to be embedded below the surface of the roadway;
said system being designed to be installed in a roadway such that the live, neutral and protective conductive tracks are flush with a surface of the roadway.
2. The system according to claim 1 , wherein the protective conductive track is electrically connected to a wire designed to be buried in the roadway, so as to place said protective conductive track at the ground potential.
3. The system according to claim 1 , wherein the live conductive track is made up of a plurality of elongated segments, arranged end to end and electrically isolated from one another.
4. The system according to claim 3 , wherein each segment is electrically connected to an electric power source by a controlled switch.
5. The system according to claim 1 , wherein the protective conductive track is made up of an upper surface of a profile sealed in the roadway.
6. The system according to claim 1 , wherein the neutral conductive track is made up of a plurality of elongated segments, positioned end to end, and electrically connected to the reference potential.
7. The system according to claim 1 , wherein the protective conductive track is at a distance from the live conductive track between 5 and 50 cm, preferably between 10 and 30 cm, in particular equal to 15 cm.
8. The system according to claim 1 , wherein the width of the protective conductive track is between 1 and 20 cm, preferably between 2.5 and 15 cm, in particular equal to 4 cm.
9. The system according to claim 1 , wherein the protective conductive track is at the surface of the roadway.
10. The system according to claim 1 , wherein the live and neutral conductive tracks are between 0 and 5 mm above the surface level of the roadway, in particular 2 mm above the surface of the roadway.
11. The system according to claim 1 , designed to power a non-guided electric vehicle equipped with means for capturing the current able, during the movement of the vehicle on the roadway, to be placed in sliding contact on the two live and neutral conductive tracks, simultaneously.