Power supply device, power acquisition device and safety system for electromagnetic induction-powered electric vehicle
First Claim
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1. A power supply device embedded in a road for transferring power, by electromagnetic induction, to a power acquisition device of an electric vehicle, comprising:
- a power supply core unit extending along a longitudinal direction of the road and having a substantially E-shaped cross section normal to the longitudinal direction of the road, the power supply core unit including a central core portion disposed at a center portion of the power supply core unit along the longitudinal direction of the road,two side core portions disposed at two opposite sides of the power supply core unit along the longitudinal direction of the road, each of the side core portions being spaced apart from the central core portion with a first space therebetween, anda base core portion disposed at a lower portion of the power supply core unit to magnetically connect the central core portion with the side core portions; and
a magnetic field generating unit disposed in the first spaces between the central core portion and the side core portions,wherein each of the side core portions has segmented core portions and second spaces therebetween disposed along the longitudinal direction of the road and the lengths of each segmented core portion and each second space along the longitudinal direction of the road are substantially identical to each other.
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Abstract
It is provided a power supply device and a power acquisition device for an electromagnetic induction-powered electric vehicle that increase a power transfer efficiency by maximizing a lateral deviation tolerance and by minimizing a gap between the power acquisition device and the power supply device while preventing the power acquisition device from colliding with an obstacle present on a road and being damaged by the collision.
44 Citations
22 Claims
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1. A power supply device embedded in a road for transferring power, by electromagnetic induction, to a power acquisition device of an electric vehicle, comprising:
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a power supply core unit extending along a longitudinal direction of the road and having a substantially E-shaped cross section normal to the longitudinal direction of the road, the power supply core unit including a central core portion disposed at a center portion of the power supply core unit along the longitudinal direction of the road, two side core portions disposed at two opposite sides of the power supply core unit along the longitudinal direction of the road, each of the side core portions being spaced apart from the central core portion with a first space therebetween, and a base core portion disposed at a lower portion of the power supply core unit to magnetically connect the central core portion with the side core portions; and a magnetic field generating unit disposed in the first spaces between the central core portion and the side core portions, wherein each of the side core portions has segmented core portions and second spaces therebetween disposed along the longitudinal direction of the road and the lengths of each segmented core portion and each second space along the longitudinal direction of the road are substantially identical to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power acquisition device attached to an electric vehicle for receiving power by electromagnetic induction from a power supply device embedded in a road, comprising:
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a power acquisition core unit extending along a longitudinal direction of the electric vehicle and having a substantially E-shaped cross section normal to the longitudinal direction, the power acquisition core unit including a central core portion disposed at a center portion of the power acquisition core unit disposed along the longitudinal direction of the electric vehicle, two side core portions disposed at two opposite sides along the longitudinal direction of the electric vehicle, each of the side core portions being spaced apart from the central core portion with a first space there between, and a base core portion disposed at an upper portion of the power acquisition core unit to magnetically connect the central core portion with the side core portions; and a power acquisition coil unit winding around the central core portion and disposed in the first spaces between the central core portion and the side core portions, wherein the widths of the first spaces, the central core portion and the side core portions normal to the longitudinal direction of the electric vehicle are substantially identical to each other. - View Dependent Claims (10, 11)
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12. A power acquisition device attached to an electric vehicle for receiving power by electromagnetic induction from a power supply device embedded in a road, comprising:
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a power acquisition core unit extending along a longitudinal direction of the electric vehicle and having a substantially E-shaped cross section normal to the longitudinal direction, the power acquisition core unit including a central core portion disposed at a center portion of the power acquisition core unit disposed along the longitudinal direction of the electric vehicle, two side core portions disposed at two opposite sides along the longitudinal direction of the electric vehicle, each of the side core portions being spaced apart from the central core portion with a first space therebetween, and a base core portion disposed at an upper portion of the power acquisition core unit to magnetically connect the central core portion with the side core portions; a power acquisition coil unit winding around the central core portion and disposed in the first spaces between the central core portion and the side core portions; and one or more wheel-shaped rotary magnetic field transfer members provided below each of the central core portion and the side core portions, wherein each of the transfer members includes a magnetic portion disposed at a central portion thereof and a non-magnetic portion made of a soft material and covering at least a periphery of the magnetic portion. - View Dependent Claims (13)
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14. A power acquisition device attached to an electric vehicle for receiving power by electromagnetic induction from a power supply device embedded in a road, comprising:
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a power acquisition core unit extending along a longitudinal direction of the electric vehicle and having a substantially E-shaped cross section normal to the longitudinal direction, the power acquisition core unit including a central core portion disposed at a center portion of the power acquisition core unit disposed along the longitudinal direction of the electric vehicle, two side core portions disposed at two opposite sides along the longitudinal direction of the electric vehicle, each of the side core portions being spaced apart from the central core portion with a first space therebetween, and a base core portion disposed at an upper portion of the power acquisition core unit to magnetically connect the central core portion with the side core portions; a power acquisition coil unit winding around the central core portion and disposed in the first spaces between the central core portion and the side core portions; and a plurality of magnetic brushes attached to lower end surfaces of the central core portion and the side core portions, wherein the magnetic brushes have a predetermined vertical length so that the brushes make contact with a surface of the road. - View Dependent Claims (15, 16)
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17. A power acquisition tire for functioning as a wheel of an electric vehicle while receiving power by electromagnetic induction from a power supply device embedded in a road, comprising:
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a tire having a space thereinside; a power acquisition core unit having a substantially E-shaped cross section including a central core portion disposed along a circumferential direction of the tire at a center portion of an inner surface of the tire, a couple of side core portions disposed along the circumferential direction of the tire at the inner surface of the tire with the central core portion therebetween, and a base core portion disposed at an opposite side of the inner surface of the tire to magnetically connect the central core portion with the side core portions; and a power acquisition coil unit disposed along spaces between the central core portion and the side core portions. - View Dependent Claims (18)
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19. A safety system for preventing a power acquisition device attached to an electromagnetic induction-powered electric vehicle from colliding with an obstacle present on a road, comprising:
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a supporting member for holding the power acquisition device; a link member for connecting a bottom surface of the electric vehicle with the supporting member, one end portion of the link member being hingedly connected to the bottom surface of the electric vehicle so that the link member pivotally moves about a hinge axis in a back-and-forth direction within a plane perpendicular to a surface of the road, the other end portion of the link member being hingedly connected to the supporting member; a shock absorber attached to a front end portion of the supporting member to absorb shock from the obstacle; and a protection plate attached to a front end portion of the shock absorber to extend obliquely with respect to a longitudinal direction of the electric vehicle, wherein the link member is rotated upwardly about the hinge axis when the obstacle collides with the protection plate. - View Dependent Claims (20, 21, 22)
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Specification