CONTACTLESS POWER TRANSFER DEVICE FOR MOVING OBJECT
First Claim
1. A contactless power transfer device for a moving object, in which a power transmission coil connected to a high-frequency power source is installed on the ground, a power receiving coil facing the power transmission coil with a gap in between is installed in the moving object, and power is transferred from the power transmission coil to the power receiving coil, whereineach of the power transmission coil and the power receiving coil has an H-shaped core, core portions in parallel with each other in the core form magnetic poles, and a core portion that connects between the magnetic poles facing each other forms a wire-wound portion around which a wire is wound,the power receiving coil is installed in the moving object so that the core portions in parallel with each other are perpendicular to a front-back direction of the moving object,in the H-shaped core of the power transmission coil or the power receiving coil, at least one of the magnetic poles includes a first search coil that intersects a magnetic flux proceeding toward one end of the magnetic pole from the wire-wound portion and a magnetic flux proceeding in the opposite direction and a second search coil that intersects a magnetic flux proceeding toward the other end of the magnetic pole from the wire-wound portion and a magnetic flux proceeding in the opposite direction, andthe contactless power transfer device for a moving object further includes a power transferable range identification unit that uses a voltage detected by the first search coil or the second search coil to identify whether the power transmission coil and the power receiving coil are located inside the power transferable range.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a contactless power transfer device for a moving object. Each of a power transmission coil and a power receiving coil comprises an H-shaped core, and first, second and third search coils are installed on a magnetic pole object of the H-shaped core of the power transmission coil. A y-direction positional deviation between the power transmission coil and the power receiving coil is detected using voltages measured at the first and second search coils, and an x-direction positional deviation is detected using voltages measured at the third search coils.
32 Citations
8 Claims
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1. A contactless power transfer device for a moving object, in which a power transmission coil connected to a high-frequency power source is installed on the ground, a power receiving coil facing the power transmission coil with a gap in between is installed in the moving object, and power is transferred from the power transmission coil to the power receiving coil, wherein
each of the power transmission coil and the power receiving coil has an H-shaped core, core portions in parallel with each other in the core form magnetic poles, and a core portion that connects between the magnetic poles facing each other forms a wire-wound portion around which a wire is wound, the power receiving coil is installed in the moving object so that the core portions in parallel with each other are perpendicular to a front-back direction of the moving object, in the H-shaped core of the power transmission coil or the power receiving coil, at least one of the magnetic poles includes a first search coil that intersects a magnetic flux proceeding toward one end of the magnetic pole from the wire-wound portion and a magnetic flux proceeding in the opposite direction and a second search coil that intersects a magnetic flux proceeding toward the other end of the magnetic pole from the wire-wound portion and a magnetic flux proceeding in the opposite direction, and the contactless power transfer device for a moving object further includes a power transferable range identification unit that uses a voltage detected by the first search coil or the second search coil to identify whether the power transmission coil and the power receiving coil are located inside the power transferable range.
Specification