Roadway power and control system for inductively coupled transportation system

• US 4,836,344 A
• Filed: 05/08/1987
• Issued: 06/06/1989
• Est. Priority Date: 05/08/1987
• Status: Expired due to Term

• Current Assignee: Inductran Incorporated
• Original Assignee: Inductran Incorporated
• Inventors: Bolger, John G.
• Primary Examiner(s): BENNETT, HENRY A
• Application Number:
  US07/047,284
• Time in Patent Office: 760 Days
• Field of Search: 191/10, 191/13, 191/15, 246/31, 246/202
• US Class Current: 191/10
• CPC Class Codes: B60L 13/03 Electric propulsion by linear motors
• CPC Class Codes: B60L 15/005 for control of propulsion for vehicles propelled by linear motors
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

An electrical modular roadway system adapted for transmitting power to and controlling inductively coupled vehicles traveling thereon. The system comprises a plurality of elongated, electrically connected inductor modules arranged in an aligned end to end spaced apart order to form a continuous vehicle path. Each module has a magnetic core and power windings which generate a magnetic field extending above the road surface. Controllable relays are connected between modules for allowing operating electric current to either activate or bypass selected modules. Sensing windings in modules are activated by the presence of a vehicle on one module to provide control signals to relays for other modules.

Claims

1. An electrical roadway adapted for transmitting power to and controlling inductively coupled vehicles traveling thereon comprising:

a plurality of elongated inductor modules arranged in an aligned end to end spaced apart order to form a vehicle path, each of said modules being disposed within the roadway adjacent to its upper surface and responsive to an electric current flowing therethrough to generate a magnetic field extending above said surface; and

inductively controllable means connected to said modules for preventing full operating electric current from flowing through a selected one or more of said plurality of modules and thereby temporarily deactivating the field generating capacity thereof.

2. An inductively coupled modular roadway system for transmitting power to and controlling vehicles traveling thereon, comprising:

a first inductor module having magnetic core means and a power winding conductor associated therewith connected to an electrical power source;

a second inductor module also having magnetic core means and an associated power winding conductor connected to the power winding of said first inductor module; and

a control means connected to said modules and responsive to an inductive control signal for temporarily deactivating said second module by preventing a flow of full operating current through its said power winding.

3. A roadway as described in claim 2 including a sensor coil in one of said inductor modules for producing a control signal to said control means when a vehicle passes over said sensor coil.

4. A roadway as described in claim 2 wherein said control means comprises a relay.

5. A roadway as described in claim 4 wherein said relay comprises:

first interruptable current conducting means;

second interruptable current conducting means in parallel with the first conducting means; and

time delay means for causing said second conducting means to interrupt a predetermined interval of time after said first conducting means in response to a said control signal.

6. A roadway as described in claim 5 wherein said first conducting means comprises a mercury relay.

7. A roadway as described in claim 5 wherein said second conducting means comprises a solid state switching element.

8. A roadway as described in claim 2 wherein each said inductor module comprises an inductor core having spaced apart pole sections interconnected by a cross core member, and a series of power conductor coils extending longitudinally within said module around said core.

9. A roadway as described in claim 8 wherein said inductor core pole sections are comprised of spaced apart strips of sheet steel and said cross core is comprised of laminated sheets of steel extending between and across said pole sections, and a mixture of dielectric granular particles and resin between said strips of said core pole sections.

10. A roadway as described in claim 8 wherein said granular particles are coarse dry sand and a mixture of said sand and resin filling all voids in said module around said core and conductor coils.

11. A roadway as described in claim 8 wherein said resin comprises polyester resin.

12. A roadway as described in claim 8 wherein said resin comprises epoxy resin.

13. A roadway as described in claim 8 and further comprising a protective covering surrounding said inductor core and said conductive coils.

14. A roadway as described in claim 8 wherein said cross core member is comprised of a plurality of spaced apart sections having the same cross sections, and a separate sensor conductor wrapped around each said core section.

15. A roadway as described in claim 14 including a bypass conductor extending longitudinally within said module between and parallel to said core pole sections, said bypass conductor having a greater cross-sectional area than one of said power conductor coils.

16. A roadway as described in claim 8 including terminal means at both ends of each said module for said power conductor;

and jumper means for connecting said terminal means of adjacent modules.

17. A roadway as described in claim 15 including separate terminal means at the end of each said module for said power conductor, said bypass conductor and said sensor coils.