Inductive power receiver apparatus
First Claim
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1. A magnetic flux pad for receiving magnetic flux, the pad comprising:
- a magnetically permeable core;
two overlapping substantially coplanar coils magnetically associated with the core, the coils overlapping each other such that there is reduced mutual coupling between the coils; and
an apparatus configured to tune each coil and combine an output of each tuned coil to thereby provide power.
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Abstract
A magnetic flux pad (BPP) is provided for receiving magnetic flux. The pad may be used with an inductive power transfer system, and comprises a magnetically permeable core (4) and two substantially flat overlapping coils (2, 3) magnetically associated with the core (4).
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Citations
14 Claims
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1. A magnetic flux pad for receiving magnetic flux, the pad comprising:
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a magnetically permeable core; two overlapping substantially coplanar coils magnetically associated with the core, the coils overlapping each other such that there is reduced mutual coupling between the coils; and an apparatus configured to tune each coil and combine an output of each tuned coil to thereby provide power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Pick-up apparatus for an inductive power transfer system, the power supply apparatus comprising:
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a magnetic flux pad for receiving a magnetic flux, the pad comprising magnetically permeable core, two substantially flat overlapping coils magnetically associated with the core, wherein an overlap between the coils is such that there is reduced mutual coupling between the coils; and apparatus adapted to tune each coil and combine an output of each tuned coil to provide power to an output of the pick-up. - View Dependent Claims (11, 12)
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13. A method for providing an IPT magnetic flux receiver pad having a plurality of coils in which there is no mutual magnetic coupling between the coils, the method comprising:
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overlapping the coils; varying the overlap between the coils such that an overlap position is achieved whereby there is substantially no mutual coupling between the coils; and providing apparatus configured to tune each coil independently. - View Dependent Claims (14)
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Specification