Inductive coil assembly
First Claim
1. A secondary for an inductively powered device comprising:
- a first coil arranged at a first angular orientation;
a second coil arranged at a second angular orientation, said first angular orientation being different from said second orientation;
a third coil arranged at a third angular orientation, said third angular orientation being different from said first orientation and said second orientation;
said first angular orientation, said second angular orientation and said third angular orientation are about ninety degrees apart from one another;
a capacitor connected in series between said load and each of said first coil, said second coil and said third coil;
said first coil, said second coil and said third coil are electrically connected in a half-bridge arrangement with a diode connected in series between said load and each of said first coil, said second coil and said third coil; and
circuit means for electrically connecting said first coil and said second coil with a common load.
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Accused Products
Abstract
An inductive coil assembly having multiple coils arranged at distinct orientations to provide efficient inductive coupling of power or communications or both to a device when the device is arranged at different orientations with respect to the inductive primary coil. In one embodiment, the inductive coil assembly includes three coils, each oriented along one of the x, y and z axes of a standard Cartesian three-dimensional coordinate system. The three separate coils provide effective transfer of power and communication when the device is at essentially any orientation with respect to the primary coil. In an alternative embodiment, the multi-axis inductive coil assembly of the present invention can function as a primary to inductively transmit power or communication or both over a plurality of magnetic fields at distinct orientations.
368 Citations
18 Claims
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1. A secondary for an inductively powered device comprising:
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a first coil arranged at a first angular orientation; a second coil arranged at a second angular orientation, said first angular orientation being different from said second orientation; a third coil arranged at a third angular orientation, said third angular orientation being different from said first orientation and said second orientation; said first angular orientation, said second angular orientation and said third angular orientation are about ninety degrees apart from one another; a capacitor connected in series between said load and each of said first coil, said second coil and said third coil; said first coil, said second coil and said third coil are electrically connected in a half-bridge arrangement with a diode connected in series between said load and each of said first coil, said second coil and said third coil; and circuit means for electrically connecting said first coil and said second coil with a common load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An inductively powered device comprising:
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a load; a secondary electrically connected to said load, said secondary including a first coil electrically connected with said load and a second coil electrically connected with said load, said first coil arranged at a first angular orientation, said second coil arranged at a second angular orientation different from said first angular orientation, a third coil arranged at a third angular orientation, said third angular orientation being different from said first orientation and said second orientation, wherein said first angular orientation, said second angular orientation and said third angular orientation are each about ninety degrees apart from one another; a capacitor connected in series between said load and each of said first coil, said second coil and said third coil; and said first coil, said second coil and said third coil are electrically connected in a half-bridge arrangement with a diode connected in series between said load and each of said first coil, said second coil and said third coil. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification