Vehicle to wireless power transfer coupling coil alignment sensor
First Claim
1. A structure comprising a position sensing apparatus mounted on a vehicle, said position sensing apparatus comprising at least a receiver coil configured to generate a voltage in proportion to a net magnetic flux captured in a first loop and a second loop that are serially connected to each other, wherein one of said first loop and said second loop is wound clockwise and another of said first loop and second loop is wound counterclockwise, wherein said position sensing apparatus further comprises a vehicle alignment human-machine interface (HMI) configured to indicate a positional offset of said vehicle relative to a source of a magnetic field as calculated from a measurement on said voltage.
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Accused Products
Abstract
A non-contacting position sensing apparatus includes at least one vehicle-mounted receiver coil that is configured to detect a net flux null when the vehicle is optimally aligned relative to the primary coil in the charging device. Each of the at least one vehicle-mounted receiver coil includes a clockwise winding loop and a counterclockwise winding loop that are substantially symmetrically configured and serially connected to each other. When the non-contacting position sensing apparatus is located directly above the primary coil of the charging device, the electromotive forces from the clockwise winding loop and the counterclockwise region cancel out to provide a zero electromotive force, i.e., a zero voltage reading across the coil that includes the clockwise winding loop and the counterclockwise winding loop.
25 Citations
12 Claims
- 1. A structure comprising a position sensing apparatus mounted on a vehicle, said position sensing apparatus comprising at least a receiver coil configured to generate a voltage in proportion to a net magnetic flux captured in a first loop and a second loop that are serially connected to each other, wherein one of said first loop and said second loop is wound clockwise and another of said first loop and second loop is wound counterclockwise, wherein said position sensing apparatus further comprises a vehicle alignment human-machine interface (HMI) configured to indicate a positional offset of said vehicle relative to a source of a magnetic field as calculated from a measurement on said voltage.
- 11. A structure comprising a position sensing apparatus mounted on a vehicle, said position sensing apparatus comprising at least a receiver coil configured to generate a voltage in proportion to a net magnetic flux captured in a first loop and a second loop that are serially connected to each other, wherein one of said first loop and said second loop is wound clockwise and another of said first loop and second loop is wound counterclockwise, wherein said position sensing apparatus further comprises a differential flux comparator that is connected to output nodes of said receiver coil and configured to rectify said voltage into a direct current (DC) voltage.
Specification