WO2011046374A2 - Power supply device for on-line electric vehicle having emf cancellation capability - Google Patents

Power supply device for on-line electric vehicle having emf cancellation capability Download PDF

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Publication number
WO2011046374A2
WO2011046374A2 PCT/KR2010/007039 KR2010007039W WO2011046374A2 WO 2011046374 A2 WO2011046374 A2 WO 2011046374A2 KR 2010007039 W KR2010007039 W KR 2010007039W WO 2011046374 A2 WO2011046374 A2 WO 2011046374A2
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WO
WIPO (PCT)
Prior art keywords
power supply
split return
line
supply device
return cables
Prior art date
Application number
PCT/KR2010/007039
Other languages
French (fr)
Other versions
WO2011046374A3 (en
Inventor
Nam Pyo Suh
Dongho Cho
Chun Taek Rim
Joung Ho Kim
Jung Goo Cho
Gu Ho Jeong
Chul Seong Choi
Jin Huh
Kyung Hun Lee
Bo Yune Song
Yang Jin Cho
Chae Hun Lim
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Korea Advanced Institute Of Science And Technology
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Publication date
Application filed by Korea Advanced Institute Of Science And Technology filed Critical Korea Advanced Institute Of Science And Technology
Publication of WO2011046374A2 publication Critical patent/WO2011046374A2/en
Publication of WO2011046374A3 publication Critical patent/WO2011046374A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M5/00—Arrangements along running rails or at joints thereof for current conduction or insulation, e.g. safety devices for reducing earth currents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/005—Current collectors for power supply lines of electrically-propelled vehicles without mechanical contact between the collector and the power supply line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • the present invention relates to a power supply device for an on-line electric vehicle, and more particularly, to a power supply device capable of canceling the intensity of electromagnetic field (EMF) occurring therefrom.
  • EMF electromagnetic field
  • a non-contact power supply device using magnetic induction which is capable of supplying an electric power required for the on-line electric vehicle from a road, and charges a battery, while being driven.
  • One of examples of the non-contact power delivery apparatus is disclosed in a PCT application PCT/KR2010/000856, filed on February 11, 2010, entitled POWER SUPPLY DEVICE, POWER ACQUISITION DEVICE AND SAFETY SYSTEM FOR ELECTROMAGNETIC INDUCTION-POWERED ELECTRIC VEHICLE, which is assigned to the assignee of the present application.
  • the power supply device is embedded along a road and includes a power supply rail having a power supply core and one or more power supply lines connected to a power supply unit.
  • a power supply rail having a power supply core and one or more power supply lines connected to a power supply unit.
  • one power supply line defines a monorail and two power supply lines define a dual-rail.
  • the power supply device needs to have durability against a load and pressure of the vehicle driving on the road, which amounts to more than 10 tons. Further, in the power supply device, the electromagnetic field emitting from the power supply device is required to reach up to 12cm or more from the ground, which is the minimum height between the power supply device and an on-line electric vehicle. However, the electromagnetic field is harmful to a human body, and specifically, the intensity of the electromagnetic field occurred in a monorail power supply device is higher than that of a dual-rail power supply device.
  • the present invention provides a power supply device for an on-line electric vehicle to reduce the intensity of electromagnetic field (EMF) occurring in the power supply device by cancelling the EMF at both sides and/or lower side of the power supply device.
  • EMF electromagnetic field
  • a power supply device of canceling the intensity of electromagnetic field which embedded in the longitudinal direction of a road and used for supplying a power to an on-line electric vehicle using magnetic induction
  • the power supply device including: a power supply unit; a power supply rail, the power supply rail having a power supply core, an insulator and a power supply line which are sequentially stacked, wherein one end of the power supply line is connected to the output end of the power supply unit; and a pair of split return cables, each split return cable being arranged in parallel at a distance from the power supply line in the horizontal direction of the power supply line, one ends of the split return cables being electrically connected to the other end of the power supply line that is not connected to the power supply unit, and the other ends of the split return cables being electrically connected to the power supply unit.
  • the power supply device further includes another pair of split return cables, each split return cable being located below of the power supply rail at a distance from the base of the power supply rail, one ends of the split return cables being electrically connected to the other end of the power supply line that is not connected to the power supply unit, and the other ends of the split return cables being electrically connected to the power supply unit.
  • a power supply device of canceling the intensity of electromagnetic field which is embedded in the longitudinal direction of a road and used for supplying a power to an on-line electric vehicle using magnetic induction
  • the power supply device including: a power supply unit; a power supply rail, the power supply rail having a power supply core, an insulator and a power supply line which are sequentially stacked, wherein one end of the power supply line is connected to the output end of the power supply unit; and a pair of split return cables, each split return cable being arranged in parallel at a distance from the power supply line in the horizontal direction of the power supply line and located below of the power supply rail at a distance from the base of the power supply rail, one ends of the split return cables being electrically connected to the other end of the power supply line that is not connected to the power supply unit, and the other ends of the split return cables being electrically connected to the power supply unit.
  • Fig. 1 schematically illustrates a plan view of a power supply device for an on-line electric vehicle in accordance with a first embodiment of the present invention
  • Fig. 2 illustrates a sectional view taken along lines II-II of the power supply device illustrated in Fig. 1;
  • Fig. 3 illustrates a sectional view of a power supply device for an on-line electric vehicle in accordance with a second embodiment of the present invention.
  • Fig. 4 illustrates a sectional view of a power supply device for an on-line electric vehicle in accordance with a third embodiment of the present invention.
  • Fig. 1 schematically illustrates a plan view of a power supply device for an on-line electric vehicle in accordance with a first embodiment of the present invention
  • Fig. 2 illustrates a sectional view taken along lines II-II of the power supply device illustrated in Fig. 1.
  • the power supply device includes a power supply unit 600, and a power supply rail (or track) 100 in which a power supply core 130, an insulator 120 and a power supply line 110 are sequentially stacked.
  • the power supply device is embedded in a road along the longitudinal direction of the road and used for supplying a power to an on-line electric vehicle using magnetic induction.
  • the power supply line 110 is constructed of a flat conductive material, for example, copper or aluminum material, and the power supply core 130 is formed of a magnetic body.
  • the insulator 120 electrically insulates the power supply line 110 and the power supply core 130 from each other. One end of the power supply line 110 is connected to the output end of the power supply unit 600.
  • EMF electromagnetic field
  • the power supply device further includes a pair of split return cables 200L and 200R.
  • One ends of the split return cables 200L and 200R are electrically connected to the input end of the power supply unit 600, and the other ends of the split return cables 200L and 200R are electrically connected to the other end of the power supply line 110 that is not connected to the power supply unit 600.
  • the split return cables 200L and 200R are extended in the longitudinal direction of the road in parallel to each other and on both sides of the power supply rail 100.
  • Each of the split return cables 200L and 200R is arranged at a distance 'g' from the power supply line 110 in the horizontal direction of the power supply line 110. Further, the split return cables 200L and 200R are arranged at a distance S to each other.
  • Reference numerals 210L and 210R are segments of the power supply core 130, respectively, which are separated from the power supply core 130 and may be removed.
  • the current from the power supply unit 600 passes through the power supply line 110, branches off to the split return cables 200L and 200R, and then flows to the power supply unit 600 again, to thereby reduce the EMF by canceling the EMF occurring at both sides of the power supply rail 100.
  • the intensity of EMF becomes equal to or less than 62.5 mG that is the permissible reference value of human exposure to the EMF.
  • Such EMF ranges at a position where the height H and radius R from the center portion of the magnetic body are about 50cm and about 1.5m, respectively, that is, where the distance from the center portion of the magnetic body is about 1.58m, but not effect on a human body within the range.
  • Fig. 3 illustrates a sectional view of a power supply device for an on-line electric vehicle in accordance with a second embodiment of the present invention.
  • the power supply device of the second embodiment of the present invention is the same as that of the first embodiment of the present invention except that another pair of split return cables 300L and 300R is further included below the power supply rail 100. Therefore, detailed description for the same elements will be omitted.
  • one ends of the return cables 300L and 300R are electrically connected to the input end of the power supply unit 600 and the other ends of the return cables 300L and 300R are electrically connected to the other end of the power supply line 110 which is not connected to the power supply unit 600.
  • the split return cables 300L and 300R are located below the power supply rail 100 at a distance D from the base of the power supply rail 100 in the vertical direction of the road and adjacent to each other.
  • the split return cables 300L and 300R extended in the longitudinal direction of the road in parallel to each other and on both sides of the power supply rail 100.
  • the current from the power supply unit 600 passes through the power supply line 110, branches off to the split return cables 200L and 200R; and 300L and 300R, and then flows to the power supply unit 600 again, to thereby reduce the intensity of EMF by canceling the EMF occurring at both sides and lower side of the power supply rail 100.
  • the intensity of EMF becomes equal to or less than 62.5 mG that is the permissible reference value of human exposure to the EMF.
  • EMF ranges at a position where the height H and radius R from the center portion of the magnetic body are about 50cm and about 1.25m, respectively, that is, where the distance from the center portion of the magnetic body is about 1.58m, but not effect on a human body within the range.
  • Fig. 4 illustrates a sectional view of a power supply device for an on-line electric vehicle in accordance with a third embodiment of the present invention.
  • the power supply device of the third embodiment of the present invention is the same as that of the first embodiment except that split return cables 400L and 400R are located below the power supply rail 100 at a distance D from the base of the power supply rail 100 in the vertical direction of the road while being arranged at a distance 'g' from the power supply line 110 in the horizontal direction of the power supply line 110 on both sides of the power supply rail 100.
  • split return cables 400L and 400R are arranged at a distance S to each other.
  • one ends of the return cables 400L and 400R are electrically connected to the input end of the power supply unit 600 and the other ends of the return cables 400L and 400R are electrically connected to the other end of the power supply line 110 which is not connected to the power supply unit 600.
  • the current from the power supply unit 600 passes through the power supply line 110, branches off to the split return cables 400L and 400R, and then flows to the power supply unit 600 again, to thereby reduce the EMF by canceling the EMF occurring at both sides and lower side of the power supply rail 100.
  • the intensity of EMF becomes equal to or less than 62.5mG that is the permissible reference value of human exposure to the EMF.
  • EMF reaches ranges at a position where the height H and radius R from the center portion of the magnetic body are about 50cm and about 1.25m, respectively, that is, where the distance from the center portion of the magnetic body is about 1.58m, but not effect on a human body within the range.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A power supply device is embedded in the longitudinal direction of a road and used for supplying a power to an on-line electric vehicle using magnetic induction. The power supply device includes a pair of split return cables, each split return cable being arranged in parallel at a distance from a power supply line in the horizontal direction of the power supply line, one ends of the split return cables being electrically connected to the other end of the power supply line, and the other ends of the split return cables being electrically connected to the power supply unit. Accordingly, the current from a power supply unit passes through the power supply line, branches off to the split return cables, and then flows to the power supply unit again, to thereby reduce EMF by canceling the EMF occurring at both sides of the power supply device.

Description

POWER SUPPLY DEVICE FOR ON-LINE ELECTRIC VEHICLE HAVING EMF CANCELLATION CAPABILITY
The present invention relates to a power supply device for an on-line electric vehicle, and more particularly, to a power supply device capable of canceling the intensity of electromagnetic field (EMF) occurring therefrom.
Existing battery-powered electric vehicles have problems such as an excessive capacity, a long charging time, low charging efficiency and a short lifetime of rechargeable batteries. Such rechargeable batteries lead to an increase in weight or volume and cost of the vehicles, and require charging stations therefor.
In order to solve the above problems, there has been proposed a non-contact power supply device using magnetic induction, which is capable of supplying an electric power required for the on-line electric vehicle from a road, and charges a battery, while being driven. One of examples of the non-contact power delivery apparatus is disclosed in a PCT application PCT/KR2010/000856, filed on February 11, 2010, entitled POWER SUPPLY DEVICE, POWER ACQUISITION DEVICE AND SAFETY SYSTEM FOR ELECTROMAGNETIC INDUCTION-POWERED ELECTRIC VEHICLE, which is assigned to the assignee of the present application.
The power supply device is embedded along a road and includes a power supply rail having a power supply core and one or more power supply lines connected to a power supply unit. In this power supply device, one power supply line defines a monorail and two power supply lines define a dual-rail.
The power supply device needs to have durability against a load and pressure of the vehicle driving on the road, which amounts to more than 10 tons. Further, in the power supply device, the electromagnetic field emitting from the power supply device is required to reach up to 12cm or more from the ground, which is the minimum height between the power supply device and an on-line electric vehicle. However, the electromagnetic field is harmful to a human body, and specifically, the intensity of the electromagnetic field occurred in a monorail power supply device is higher than that of a dual-rail power supply device.
In view of the above, the present invention provides a power supply device for an on-line electric vehicle to reduce the intensity of electromagnetic field (EMF) occurring in the power supply device by cancelling the EMF at both sides and/or lower side of the power supply device.
In accordance with a first aspect of the present invention, there is provided a power supply device of canceling the intensity of electromagnetic field, which embedded in the longitudinal direction of a road and used for supplying a power to an on-line electric vehicle using magnetic induction, the power supply device including: a power supply unit; a power supply rail, the power supply rail having a power supply core, an insulator and a power supply line which are sequentially stacked, wherein one end of the power supply line is connected to the output end of the power supply unit; and a pair of split return cables, each split return cable being arranged in parallel at a distance from the power supply line in the horizontal direction of the power supply line, one ends of the split return cables being electrically connected to the other end of the power supply line that is not connected to the power supply unit, and the other ends of the split return cables being electrically connected to the power supply unit.
Preferably, the power supply device further includes another pair of split return cables, each split return cable being located below of the power supply rail at a distance from the base of the power supply rail, one ends of the split return cables being electrically connected to the other end of the power supply line that is not connected to the power supply unit, and the other ends of the split return cables being electrically connected to the power supply unit.
In accordance with a second aspect of the present invention, there is provided a power supply device of canceling the intensity of electromagnetic field, which is embedded in the longitudinal direction of a road and used for supplying a power to an on-line electric vehicle using magnetic induction, the power supply device including: a power supply unit; a power supply rail, the power supply rail having a power supply core, an insulator and a power supply line which are sequentially stacked, wherein one end of the power supply line is connected to the output end of the power supply unit; and a pair of split return cables, each split return cable being arranged in parallel at a distance from the power supply line in the horizontal direction of the power supply line and located below of the power supply rail at a distance from the base of the power supply rail, one ends of the split return cables being electrically connected to the other end of the power supply line that is not connected to the power supply unit, and the other ends of the split return cables being electrically connected to the power supply unit.
The above and other objects and features of the present invention will become apparent from the following description of embodiments given in conjunction with the accompanying drawings, in which:
Fig. 1 schematically illustrates a plan view of a power supply device for an on-line electric vehicle in accordance with a first embodiment of the present invention;
Fig. 2 illustrates a sectional view taken along lines II-II of the power supply device illustrated in Fig. 1;
Fig. 3 illustrates a sectional view of a power supply device for an on-line electric vehicle in accordance with a second embodiment of the present invention; and
Fig. 4 illustrates a sectional view of a power supply device for an on-line electric vehicle in accordance with a third embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the several Figures of the drawings, like reference numerals are used to designate like or equivalent elements, functions or components.
Fig. 1 schematically illustrates a plan view of a power supply device for an on-line electric vehicle in accordance with a first embodiment of the present invention; and Fig. 2 illustrates a sectional view taken along lines II-II of the power supply device illustrated in Fig. 1.
Referring to the drawings, the power supply device includes a power supply unit 600, and a power supply rail (or track) 100 in which a power supply core 130, an insulator 120 and a power supply line 110 are sequentially stacked. The power supply device is embedded in a road along the longitudinal direction of the road and used for supplying a power to an on-line electric vehicle using magnetic induction.
The power supply line 110 is constructed of a flat conductive material, for example, copper or aluminum material, and the power supply core 130 is formed of a magnetic body. The insulator 120 electrically insulates the power supply line 110 and the power supply core 130 from each other. One end of the power supply line 110 is connected to the output end of the power supply unit 600.
When current flows in the power supply line 110, an electromagnetic field (EMF) is created around the power supply line 110. The intensity of EMF proportions to the magnitude of the current and is reduced in inverse proportion to the distance from the power supply line 110.
In order to reduce EMF, the power supply device further includes a pair of split return cables 200L and 200R. One ends of the split return cables 200L and 200R are electrically connected to the input end of the power supply unit 600, and the other ends of the split return cables 200L and 200R are electrically connected to the other end of the power supply line 110 that is not connected to the power supply unit 600. The split return cables 200L and 200R are extended in the longitudinal direction of the road in parallel to each other and on both sides of the power supply rail 100. Each of the split return cables 200L and 200R is arranged at a distance 'g' from the power supply line 110 in the horizontal direction of the power supply line 110. Further, the split return cables 200L and 200R are arranged at a distance S to each other.
Reference numerals 210L and 210R are segments of the power supply core 130, respectively, which are separated from the power supply core 130 and may be removed.
Accordingly, the current from the power supply unit 600 passes through the power supply line 110, branches off to the split return cables 200L and 200R, and then flows to the power supply unit 600 again, to thereby reduce the EMF by canceling the EMF occurring at both sides of the power supply rail 100.
When the distance 'g' between the split return cables 200L and 200R and the power supply line 110 is about 50cm, the intensity of EMF becomes equal to or less than 62.5 mG that is the permissible reference value of human exposure to the EMF. Such EMF ranges at a position where the height H and radius R from the center portion of the magnetic body are about 50cm and about 1.5m, respectively, that is, where the distance from the center portion of the magnetic body is about 1.58m, but not effect on a human body within the range.
Fig. 3 illustrates a sectional view of a power supply device for an on-line electric vehicle in accordance with a second embodiment of the present invention.
The power supply device of the second embodiment of the present invention is the same as that of the first embodiment of the present invention except that another pair of split return cables 300L and 300R is further included below the power supply rail 100. Therefore, detailed description for the same elements will be omitted.
Although not specifically illustrated, like the split return cables 200L and 200R illustrated in Fig. 1, one ends of the return cables 300L and 300R are electrically connected to the input end of the power supply unit 600 and the other ends of the return cables 300L and 300R are electrically connected to the other end of the power supply line 110 which is not connected to the power supply unit 600.
The split return cables 300L and 300R are located below the power supply rail 100 at a distance D from the base of the power supply rail 100 in the vertical direction of the road and adjacent to each other. The split return cables 300L and 300R extended in the longitudinal direction of the road in parallel to each other and on both sides of the power supply rail 100.
Accordingly, the current from the power supply unit 600 passes through the power supply line 110, branches off to the split return cables 200L and 200R; and 300L and 300R, and then flows to the power supply unit 600 again, to thereby reduce the intensity of EMF by canceling the EMF occurring at both sides and lower side of the power supply rail 100.
When the distance 'g' between the split return cables 200L and 200R and the power supply line 110 is 50cm and the distance D between the base of the power supply track 100 and the split return cables 300L and 300R is 5cm more or less, the intensity of EMF becomes equal to or less than 62.5 mG that is the permissible reference value of human exposure to the EMF. Such EMF ranges at a position where the height H and radius R from the center portion of the magnetic body are about 50cm and about 1.25m, respectively, that is, where the distance from the center portion of the magnetic body is about 1.58m, but not effect on a human body within the range.
Fig. 4 illustrates a sectional view of a power supply device for an on-line electric vehicle in accordance with a third embodiment of the present invention.
The power supply device of the third embodiment of the present invention is the same as that of the first embodiment except that split return cables 400L and 400R are located below the power supply rail 100 at a distance D from the base of the power supply rail 100 in the vertical direction of the road while being arranged at a distance 'g' from the power supply line 110 in the horizontal direction of the power supply line 110 on both sides of the power supply rail 100.
Therefore, detailed description for the same elements will be omitted. Further, the split return cables 400L and 400R are arranged at a distance S to each other.
Although not specifically illustrated, like the split return cables 200L and 200R illustrated in Fig. 1, one ends of the return cables 400L and 400R are electrically connected to the input end of the power supply unit 600 and the other ends of the return cables 400L and 400R are electrically connected to the other end of the power supply line 110 which is not connected to the power supply unit 600.
Accordingly, the current from the power supply unit 600 passes through the power supply line 110, branches off to the split return cables 400L and 400R, and then flows to the power supply unit 600 again, to thereby reduce the EMF by canceling the EMF occurring at both sides and lower side of the power supply rail 100.
When the distance 'g' between the split return cables 400L and 400R and the power supply line 110 is 50cm and the distance D between the base of the power supply track 100 and the split return cables 400L and 400R is 5cm more or less, the intensity of EMF becomes equal to or less than 62.5mG that is the permissible reference value of human exposure to the EMF. Such EMF reaches ranges at a position where the height H and radius R from the center portion of the magnetic body are about 50cm and about 1.25m, respectively, that is, where the distance from the center portion of the magnetic body is about 1.58m, but not effect on a human body within the range.
While the present invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the following claims.

Claims (3)

  1. A power supply device of canceling the intensity of electromagnetic field, which is embedded in the longitudinal direction of a road and used for supplying a power to an on-line electric vehicle using magnetic induction, the power supply device comprising:
    a power supply unit;
    a power supply rail, the power supply rail having a power supply core, an insulator and a power supply line which are sequentially stacked, wherein one end of the power supply line is connected to the output end of the power supply unit; and
    a pair of split return cables, each split return cable being arranged in parallel at a distance from the power supply line in the horizontal direction of the power supply line, one ends of the split return cables being electrically connected to the other end of the power supply line that is not connected to the power supply unit, and the other ends of the split return cables being electrically connected to the power supply unit.
  2. The power supply device of claim 1, further comprising:
    another pair of split return cables, each split return cable being located below of the power supply rail at a distance from the base of the power supply rail, one ends of the split return cables being electrically connected to the other end of the power supply line that is not connected to the power supply unit, and the other ends of the split return cables being electrically connected to the power supply unit.
  3. A power supply device of canceling the intensity of electromagnetic field, which is embedded in the longitudinal direction of a road and used for supplying a power to an on-line electric vehicle using magnetic induction, the power supply device comprising:
    a power supply unit;
    a power supply rail, the power supply rail having a power supply core, an insulator and a power supply line which are sequentially stacked, wherein one end of the power supply line is connected to the output end of the power supply unit; and
    a pair of split return cables, each split return cable being arranged in parallel at a distance from the power supply line in the horizontal direction of the power supply line and located below of the power supply rail at a distance from the base of the power supply rail, one ends of the split return cables being electrically connected to the other end of the power supply line that is not connected to the power supply unit, and the other ends of the split return cables being electrically connected to the power supply unit.
PCT/KR2010/007039 2009-10-16 2010-10-14 Power supply device for on-line electric vehicle having emf cancellation capability WO2011046374A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090098977A KR20110041933A (en) 2009-10-16 2009-10-16 Monorail type power supply device for electric vehicle including emf cancellation apparatus
KR10-2009-0098977 2009-10-16

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WO2011046374A2 true WO2011046374A2 (en) 2011-04-21
WO2011046374A3 WO2011046374A3 (en) 2011-10-20

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US11612164B2 (en) 2016-12-30 2023-03-28 Winfield Solutions, Llc Drift reduction adjuvant compositions and methods of using same
US11678660B2 (en) 2016-12-30 2023-06-20 Winfield Solutions, Llc Drift reduction adjuvant compositions and methods of using same
US11910793B2 (en) 2019-01-24 2024-02-27 Winfield Solutions, Llc Multifunctional agricultural adjuvant compositions

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WO1999022385A1 (en) * 1997-10-24 1999-05-06 Daimlerchrysler Ag Electric power transmission device
JP2002137659A (en) * 2000-08-23 2002-05-14 Shinko Electric Co Ltd Non-contact feeder
JP2004224179A (en) * 2003-01-22 2004-08-12 Tsubakimoto Chain Co Noncontact current feeding device

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WO1999022385A1 (en) * 1997-10-24 1999-05-06 Daimlerchrysler Ag Electric power transmission device
JP2002137659A (en) * 2000-08-23 2002-05-14 Shinko Electric Co Ltd Non-contact feeder
JP2004224179A (en) * 2003-01-22 2004-08-12 Tsubakimoto Chain Co Noncontact current feeding device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11612164B2 (en) 2016-12-30 2023-03-28 Winfield Solutions, Llc Drift reduction adjuvant compositions and methods of using same
US11678660B2 (en) 2016-12-30 2023-06-20 Winfield Solutions, Llc Drift reduction adjuvant compositions and methods of using same
US11910793B2 (en) 2019-01-24 2024-02-27 Winfield Solutions, Llc Multifunctional agricultural adjuvant compositions

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KR20110041933A (en) 2011-04-22

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