Counter wound inductive power supply

A contactless power supply system comprising:

• a remote device including an inductive secondary;
• and
• a contactless power supply including a power transfer surface to receive the remote device thereon and including first and second coaxial inductive primaries subjacent the power transfer surface and defining a centerline axis generally parallel to the power transfer surface,
• wherein the inductive secondary is orthogonal to the first and second inductive primaries, and wherein the first and second inductive primaries are operable to generate a cumulative magnetic flux in the region of the power transfer surface generally occupied by the orthogonal inductive secondary.

A method for providing wireless power to remote device including an inductive secondary, the method comprising:

• providing a first primary coil array including a first plurality of spaced-apart inductive primaries wound about a first axis;
• driving a first one of the plurality of inductive primaries with a current in a first direction;
• and
• driving a second one of the plurality of inductive primaries with a current in a second direction, wherein the inductive secondary is generally orthogonal to the first and second inductive primaries, and wherein the first and second inductive primaries are generally tangentially aligned with the inductive secondary to provide a cumulative magnetic flux to the inductive secondary.