Raodway-powered electric vehicle system having onboard power metering and communication channel features

• US 5,573,090 A
• Filed: 05/05/1994
• Issued: 11/12/1996
• Est. Priority Date: 05/05/1994
• Status: Expired due to Term

• Current Assignee: HR Ross Industries Incorporated
• Original Assignee: HR Ross Industries Incorporated
• Inventors: Ross, Howard R.
• Primary Examiner(s): Merritt, Karen B.
• Assistant Examiner(s): LOWE, SCOTT
• Application Number:
  US08/238,826
• Time in Patent Office: 922 Days
• Field of Search: 191/2, 191/3, 191/4, 191/5, 191/6, 191/7, 191/10, 180/165, 180/2.1, 320/2, 307/9.1, 307/10.1, 246/187 R, 246/187 A, 246/187 B, 246/187 C
• US Class Current: 191/10
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2210/20 AC to AC converters
• CPC Class Codes: B60L 2270/36 of vehicles
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• CPC Class Codes: B60L 50/30 using propulsion power stored mechanically, e.g. in fly-wheels
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• CPC Class Codes: B60L 7/14 for vehicles propelled by ac motors
• 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 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A roadway-powered electric vehicle (RPEV) system includes: (1) an all-electric vehicle; and (2) a roadway network over which the vehicle travels. The all-electric vehicle has one or more onboard energy storage elements or devices that can be rapidly charged or energized with energy obtained from an electrical current, such as a network of electromechanical batteries. The electric vehicle further includes an on-board controller that extracts energy from the energy storage elements, as needed, and converts such extracted energy to electrical power used to propel the electric vehicle. The energy storage elements may be charged while the vehicle is in operation. The charging occurs through a network of power coupling elements, e.g., coils, embedded in the roadway. The RPEV system also includes: (1) an onboard power meter; (2) a wide bandwidth communication channel to allow information signals to be sent to, and received from, the RPEV while it is in use; (3) automated garaging that couples power to the RPEV for both replenishing the onboard energy source and to bring the interior climate of the vehicle to a comfortable level before the driver and/or passengers get in; (4) electronic coupling between "master" and "slave" RPEV'"'"'s in order to increase passenger capacity; (5) inductive heating coils at passenger loading/unloading zones in order to increase passenger safety; and (6) an ergonomically designed passenger compartment.

Claims

1. A roadway-powered electric vehicle comprising:

a vehicle frame supported by front and rear suspension systems, including front and rear wheels;

an onboard power receiving module mounted on an underneath side of said vehicle frame that receives electrical power coupled thereto from a roadway power transmitting module embedded in a roadway over which the electric vehicle travels;

an onboard energy storage means for storing and delivering electrical energy;

an electric drive means coupled to at least one of said front or rear suspension systems for driving at least one of said front and rear wheels;

an onboard power controller means for receiving electrical power from said onboard power receiving module and directing it to said energy storage means, and for selectively delivering electrical energy from said energy storage means to said electric drive means in order to provide operating power for said electric vehicle; and

an onboard power meter electrically connected to the onboard power receiving module to monitor the electrical power received through said onboard power receiving module from said roadway power transmitting module, said onboard power meter thereby providing a measure of the amount of electrical power that has been coupled to the electric vehicle.

2. The electric vehicle as set forth in claim 1 wherein said electric vehicle comprises a multiple occupancy vehicle (MOV) adapted for transporting at least 15 passengers, and wherein said MOV includes a passenger compartment that includes:

a door system that includes a side door that slides open and an upper door that swings up, thereby increasing the vertical entry space afforded a passenger entering or exiting said MOV through said door system; and

a seating arrangement that includes two rows of chairs set in a curved pattern.

3. The electric vehicle as set forth in claim 1 further including demodulation means coupled to said onboard power receiving module for demodulation of a communication signal included with the electrical power received by the onboard power receiving module, said communication signal being directed to said onboard power controller means to provide information to said onboard power controller means.

4. The electric vehicle as set forth in claim 3 wherein there are included a plurality of roadway sensors in the roadway over which the electric vehicle travels that monitor whether the roadway has ice or moisture thereon, said roadway sensors being spaced apart from each other by at least approximately 300 m, each of said sensors generating a sensor signal that identifies each sensor and provides an indication of whether ice or moisture is present at such identified sensor, said sensor signal being coupled to the roadway power transmitting module and being a part of the communication signal that is transmitted to the electric vehicle with the electrical power received by the onboard power receiving module, whereby each electric vehicle receives an indication of whether ice or moisture is present at a location on the roadway corresponding to the identified sensor.

5. The electric vehicle as set forth in claim 4 wherein said electric vehicle includes modulation means for modulating an electric vehicle identification signal that identifies a particular electric vehicle, and onboard transmitting means for transmitting the electric vehicle identification signal to a numbered roadway receiver located by each of said roadway power transmitting modules, each of said roadway receivers being linked to a communication station, wherein the communication station can determine when the particular electric vehicle is located near the numbered roadway receiver.

6. The electric vehicle as set forth in claim 1 wherein said electric vehicle is a first electric vehicle and wherein onboard power controller means includes generating means for generating a set of control signals that control how said first electric vehicle is being operated, and coupling means for coupling said set of control signals to a second electric vehicle, said second electric vehicle including means for electronically responding to said set of control signals so that the second RPEV is operated as controlled by said set of control signals, whereby said second electric vehicle follows said first electric vehicle.

7. The electric vehicle as set forth in claim 6 wherein said coupling means comprises a flexible cable that is connected between said first electric vehicle and said second electric vehicle through which said set of control signals may be transferred from said first electric vehicle to said second electric vehicle.

8. The electric vehicle as set forth in claim 6 wherein said coupling means includes an rf transmitter carried onboard said first electric vehicle through which said set of control signals may be transmitted, and wherein said second electric vehicle includes an onboard receiver through which the set of control signals transmitted from said first electric vehicle may be received.

9. A roadway-powered electric vehicle system comprising:

a network of highways and roadways that have been electrified with a multiplicity of roadway power transmitting modules embedded in the highways and roadways at select locations, each of the roadway power transmitting modules being connected to receive power from an electrical utility;

a plurality of electric vehicles for traversing the network of highways and roadways using electrical power coupled to the electric vehicles from the electrified highways and roadways as the electric vehicles travel over the locations of the highways and roadways that have been electrified;

communication means for establishing a communication channel with each of the plurality of electric vehicles that transfers communication signals to and from the electric vehicles through the electrified highways and roadways; and

an onboard power meter connected to monitor the amount of electrical power coupled from the electrified highways and roadways.

10. The electric vehicle system as set forth in claim 9 wherein the onboard power meter is coupled to said communication means and the amount of electrical power monitored by said onboard power meter may be included within the communication signals transferred through said communication channel.

11. The electric vehicle system as set forth in claim 9 wherein said communication channel comprises power lines used by the electrical utility to distribute electrical power to the roadway power transmitting modules and elsewhere.

12. The electric vehicle system as set forth in claim 9 wherein said communication channel comprises commercial communication lines provided by telecommunication providers.

13. The electric vehicle system as set forth in claim 9 wherein said communication channel comprises dedicated wide bandwidth communication lines installed to connect each of said roadway power transmitting modules with a central monitoring location.

14. The electric vehicle system as set forth in claim 9 wherein said communication channel further includes establishing means embedded in highways and roadways for establishing a communication link with each of the plurality of electric vehicles when said electric vehicle is over non-electrified portions of said highways and roadways, whereby continuous communications may be made with said electric vehicle as it traverses said network of highways and roadways, whether on electrified or non-electrified portions of the network of highways and roadways.

15. The electric vehicle system as set forth in claim 9 wherein said roadway power transmitting modules receive 3-phase, 50/60 Hz electrical power, and wherein a power conditioner converts the 3-phase, 50/60 Hz electrical power to a 1-phase, 2500-3500 Hz electrical power for use by said roadway power transmitting modules, said electric vehicle system further comprising heater means embedded in a surface structure along the side of the highway or roadway adjacent selected ones of said roadway power transmitting modules, said heater means being powered by electrical power from the power conditioner for preventing the formation of ice and the accumulation of snow at the location of said heater means.

16. A roadway-powered electric vehicle system comprising:

a network of highways and roadways that have been electrified with a multiplicity of roadway power transmission modules embedded in the highways and roadways at select locations, each of the roadway power transmission modules being connected to receive power from an electrical utility, the network of highways and roadways including a parking/garaging location, wherein said parking/garaging location is electrified with at least one of the multiplicity of power transmission modules;

a plurality of electric vehicles for traversing the network of highways and roadways using electrical power coupled to the electric vehicles from the electrified highways and roadways as the electric vehicles travel over the locations of the highways and roadways that have been electrified;

communication means for establishing a communication channel with each of the plurality of electric vehicles that transfers communication signals to and from the electric vehicles through the electrified highways and roadways; and

a charging control circuit coupled to the at least one of the multiplicity of roadway power transmission modules, said charging control circuit including means for sensing the presence of a parked electric vehicle at the parking/garaging location, and coupling means for automatically coupling power to the parked electric vehicle at preselected times during the day.

17. The electric vehicle system as set forth in claim 16 wherein the charging control circuit at the parking/garaging location further includes mode means for coupling power to the parked electric vehicle in a first coupling mode that couples 200 W to 500 W of electrical power to the parked electric vehicle on command, and which coupled electrical power is used by the electric vehicle to bring the interior temperature of the electric vehicle to a comfortable level, and for coupling power to the parked electric vehicle in a second coupling mode that couples 6 kW to 10 kW of electrical power to the electric vehicle over a one to four hour time period at the preselected times, which coupled electrical power is used to replenish an onboard energy storage system of the parked electric vehicle.

18. The electric vehicle system as set forth in claim 17 wherein said charging control circuit further includes a communication receiver for receiving a command signal that automatically begins said first coupling mode, wherein an operator of the parked electric vehicle may selectively begin the first coupling mode to bring the interior temperature of the electric vehicle to a comfortable level.