Method and device for designing a current supply and collection device for a transportation system using an electric vehicle

• US 9,747,391 B2
• Filed: 02/09/2011
• Issued: 08/29/2017
• Est. Priority Date: 07/15/2010
• Status: Active Grant

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: Suh, Nam Pyo, Cho, Dong Ho, Rim, Chun Taek, Jeon, Seong Jeub, Kim, Jung-Ho, Ahn, Seung-Young
• Primary Examiner(s): ALHIJA, SAIF A
• Application Number:
  US13/810,066
• Publication Number:
  US 20130304443A1
• Time in Patent Office: 2,393 Days
• Field of Search: 703 8
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• 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: B60M 7/003 for vehicles using stored power (e.g. charging stations)
• CPC Class Codes: G06F 30/00 Computer-aided design [CAD]
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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

Provided is a method for designing a current supply device for wirelessly supplying power to a vehicle having a current collection device. In the design method, the gap between the two adjacent magnetic poles of the current supply device is received as input and then the gap between the current supply device and the current collection device is determined based on the gap between the two magnetic poles. Next, the magnitude of the power to be supplied to the current supply device is determined based on the value required with respect to the magnitude of the magnetic field and the gap between the current supply device and the current collection device. According to the design method, current supply device can easily be designed since various functional requirements are decoupled from each other.

Claims

1. A computer-implemented method for designing a current supply device including a current supply core or a plurality of magnetic poles for wirelessly supplying power to a vehicle having a current collection device, the method comprising:

(a) receiving a gap between the current supply device and the current collection device as input;

(b) determining a width of the current supply core or a gap between two adjacent magnetic poles based on the gap between the current supply device and the current collection device;

(c) receiving a magnitude of a magnetic field which the current supply device is required to generate as input;

(d) determining a magnitude of a power to be supplied to the current supply device based on the width of current supply core or the gap between two adjacent magnetic poles determined at the step (b) and the value required with respect to the magnitude of the magnetic field; and

(e) supplying power to the current supply device with the magnitude determined at the step (d).

2. The computer-implemented method for designing a current supply device as claim 1, further comprising determining mounting structure of feeding line which supplies power to the current supply device (d1) after the step (d).

3. The computer-implemented method for designing a current supply device as claim 1, further comprising receiving an orientation of the magnetic poles of the current supply device as input before the step (a).

4. The computer-implemented method for designing a current supply device as claim 3, wherein for the orientation of the magnetic poles of the current supply device, more than two magnetic poles are arranged in the traveling direction of the vehicle and in a line with each other.

5. The computer-implemented method for designing current supply device as claim 3, wherein for the orientation of the magnetic poles of the current supply device, multiple magnetic poles are arranged in series in the traveling direction of the vehicle.

6. The computer-implemented method for designing a current supply device as claim 1, further comprising determining shield type either active or passive for EMF generated from the current supply device and the current collection device (d2) after said step (d).

7. The computer-implemented method for designing a current supply device as claim 1, further comprising determining on/off conditions of a switch of the current supply device (d3) after said step (d).

8. The computer-implemented method for designing a current supply device as claim 1, further comprising determining resonance of the current collection device mounted in the vehicle at a frequency of AC magnetic field generated from the current supply device (d4) after said step (d).

9. A computer-implemented method for designing a current supply device and a current collection device of a vehicle, wherein the current supply device wirelessly supplying power to the current collection device by generating magnetic field, the method comprising:

(a) a step where design parameters including resonance frequency, feeding current value, the width of the current supply device and the number of coil turns of the current collection device are set as initial values;

(b) a step where minimum current collecting capacity required for the current collection device (‘

current collecting capacity reference’

) and maximum EMF value allowable from the current supply device and the current collection device (‘

EMF reference’

) are received as input;

(c) a step where current collecting capacity and the level of EMF are calculated using the present design parameters;

(d) a step where if the calculated current collecting capacity is below said current collecting capacity reference or the level of EMF is above said EMF reference (“

design conditions dissatisfied”

), calculation of current collecting capacity and the level of EMF is repeated while adjusting feeding current value among the set design parameters; and

(e) a step where if there is feeding current value which makes the calculated current collecting capacity above said current collecting capacity reference and the level of EMF below said EMF reference (“

design conditions satisfied”

), such feeding current value and other present design parameter values are determined as the final design parameters; and

(f) applying the final design parameters to the current supply and collection device.

10. The computer-implemented method for designing a current supply and collection device as claim 9, wherein for said step (e), if there is feeding current value which satisfies design conditions, before determining the present design parameter values as the final design parameters, (e11) a step where if the present resonance frequency is below maximum resonance frequency in a permissible range (‘

upper resonance frequency), maximum resonance frequency which satisfies design conditions is found by increasing resonance frequency among said design parameters in the range below said upper resonance frequency and repeating calculation of current collecting capacity and the level of EMF is included, and then (e12) a step where the maximum resonance frequency found in said step (e11), the feeding current value of said step (e), and other present design parameter values are determined as the final design parameters is included.

11. The computer-implemented method for designing a current supply and collection device as claim 9, wherein for said step (e), if there is no feeding current value which satisfies design conditions, before determining the present design parameter values as the final design parameters, (e21) a step where calculation of current collecting capacity and the level of EMF is repeated while the width of current supply and collection core or the gap between magnetic poles (commonly called ‘

the width of current supply and collection core’

) in a permissible range is increased and feeding current value is adjusted;

(e22) a step where if the width of current supply and collection core and feeding current value which satisfy design conditions do not exist, design process for a current supply device ends, and if they exist, the next step (e23) is followed;

(e23) a step where if the present resonance frequency is below maximum resonance frequency in a permissible range (‘

upper resonance frequency’

), maximum resonance frequency satisfying design condition is found by increasing resonance frequency among said design parameters in the range below said upper resonance frequency and repeating calculation of current collecting capacity and the level of EMF is included, and then (e24) a step where the maximum resonance frequency found in said step (e23), the feeding current value of said step (e22), and other present design parameter values are determined as the final design parameters is included.

12. The computer-implemented method for designing a current supply and collection device as claim 9, wherein for said step (d), the number of collector coil turns is included in design parameters to be adjusted, and for said step (e), the number of collector coil turns is included in design parameters which are determined as the final design parameters if they exist.

13. The computer-implemented method for designing a current supply and collection device as claim 9, wherein said resonance frequency is set to be higher than maximum audio frequency.

14. The computer-implemented method for designing a current supply and collection device of claim 9, wherein decision of whether design conditions are satisfied includes decision of whether the gap between the current supply device and the current collection device is more than the minimum gap which has already been set.

15. A computer-implemented method for designing a current supply device for wirelessly supplying power to a vehicle having a current collection device by generating magnetic field, the method comprising:

(a) a step where a core structure type of the current supply device and the current collection device is received as input, of which design parameters including resonance frequency, feeding current value, the width of the current supply device, and the number of coil turns of the current collection device will be determined;

(b) a step where said design parameters are set to initial values;

(c) a step where minimum current collecting capacity required for the current collection device (current collecting capacity reference) and maximum EMF allowable from the current supply device and the current collection device are received as input;

(d) a step where current collecting capacity and the level of EMF are calculated using the present design parameters;

(e) a step where if the calculated current collecting capacity is below said current collecting capacity reference or the level of EMF is above said EMF reference (“

design conditions dissatisfied”

), calculation of current collecting capacity and the level of EMF is repeated while feeding current value among the present design parameters is adjusted;

(f) a step where if there is feeding current value which makes the calculated current collecting capacity above said current collecting capacity reference and the level of EMF below said EMF reference (“

design conditions satisfied”

), such feeding current value and other present design parameter values are determined as the final design parameters for said core structure type; and

(q) applying the final design parameters to the current supply device.

16. The computer-implemented method for designing a current supply and collection device as either claim 15, wherein for said step (a), if more than two core structure types are received as input, said steps (b) through (f) are carried out sequentially for each of the core structure types.

17. The computer-implemented method for designing a current supply and collection device as either claim 15, wherein for said step (f), if there is feeding current value which satisfies design conditions, before determining the present design parameter values as the final design parameters, (f11) a step where if the present resonance frequency is below maximum resonance frequency in a permissible range (‘

upper resonance frequency’

), maximum resonance frequency which satisfies design conditions is found by increasing resonance frequency among said design parameters in the range below said upper resonance frequency and repeating calculation of current collecting capacity and the level of EMF is included, and then (f12) a step where the maximum resonance frequency found in said step (f11), the feeding current value of said step (f), and other present design parameter values are determined as the final design parameters is included.

18. The computer-implemented method for designing a current supply and collection device as either claim 15, wherein for said step (f), if there is no feeding current value which satisfies design conditions, before determining the present design parameter values as the final design parameters, (f21) a step where calculation of current collecting capacity and the level of EMF is repeated while the width of current supply and collection core or the gap between magnetic poles (commonly called ‘

the width of current supply and collection core) is increased in a permissible range and feeding current value is adjusted;

(f22) a step where if the width of current supply and collection core and feeding current value which satisfy design conditions do not exist, design process for a current supply device ends, and if they exist, the next step (f23) is followed; and

(f23) a step where if the present resonance frequency is below maximum resonance frequency in a permissible range (‘

upper resonance frequency’

), maximum resonance frequency which satisfies design conditions is found while resonance frequency among said design parameters is increased in the range below said upper resonance frequency and calculation of current collecting capacity and the level of EMF is repeated are included, and then (f24) a step where the maximum resonance frequency found in said step (f23), the feeding current value of said step (f22), and other present design parameter values are determined as the final design parameters is included.

19. The computer-implemented method for designing a current supply and collection device as either claim 15, wherein for said step (e), the number of collector coil turns is included in design parameters to be adjusted, and for said step (f), the number of collector coil turns is included in design parameters which are determined as the final design parameters if they exist.

20. The computer-implemented method for designing a current supply and collection device as claim 15, wherein said resonance frequency is set to be higher than maximum audio frequency.