Electromagnetic coil configurations for power transmission...

A - Human Necessities – 61 – N

Patent

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Details

A61N 2/00 (2006.01) A61N 1/378 (2006.01) A61N 2/02 (2006.01)

Patent

CA 2271822

A system for improved transcutaneous power transfer efficiency comprises a transmitter coil (20) applied to the outer surface of a cutaneous layer (24) on a patient's body by adhesive tape or other appropriate supporting material, and a receiver coil (22) implanted inside the patient's body. The transmitter coil and receiver coil include cores (28, 42) having pole faces (26a, 26b, 40a, 40b) with a substantially larger area than the cross section of the core at other locations. In addition, the core of the receiver coil (42) is substantially shorter than that of the transmitter coil (28) so that the lines of flux (54) produced by the transmitter coil tend to pass through the pole faces (40a, 40b) of the receiver coil in greater density than they would if the pole faces of the transmitter and receiver cores were spaced identically. The transmitter core (28) forms an angled portion adjacent each of the pole faces so that the main portion of the transmitter core (28) is disposed generally parallel, and closely spaced to the surface of the cutaneous layer (24) against which the transmitter core (28) is placed.

Cette invention concerne un système permettant d'améliorer l'efficacité du transfert d'énergie percutané. Ce système comprend une bobine émettrice (20) qui est appliquée sur la surface externe de la couche cutanée (24) du corps d'un patient à l'aide d'une bande adhésive ou de toute autre matériau de support approprié. Ce système comprend également un bobine réceptrice (22) qui est implantée dans le corps du patient. La bobine émettrice et la bobine réceptrice comprennent des noyaux (28, 42) qui possèdent des faces polaires (26a, 26b, 40a, 40b) dont la surface est sensiblement plus importante que la section transversale desdits noyaux en d'autres endroits. Le noyau de la bobine réceptrice (42) est en outre sensiblement plus court que celui de la bobine émettrice (28). Les lignes du flux (54) produites par la bobine émettrice ont ainsi tendance à passer à travers les faces polaires (40a, 40b) de la bobine réceptrice selon une densité plus élevée qu'elles ne le feraient si les faces polaires des noyaux émetteur et récepteur étaient espacées de manière identique. Le noyau émetteur (28) définit ainsi une partie inclinée à proximité de chacune des faces polaires, ceci de manière à ce que la partie principale dudit noyau (28) soit globalement parallèle à la surface de la couche cutanée (24) sur laquelle est placé le noyau émetteur (28), et à ce que cette partie soit à proximité de ladite surface.

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