Coil system

• US 9,259,583 B2
• Filed: 07/19/2010
• Issued: 02/16/2016
• Est. Priority Date: 07/17/2009
• Status: Active Grant

• Current Assignee: Kirk Promotion Ltd.
• Original Assignee: Kirk Promotion Ltd.
• Inventors: Forsell, Peter
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): GRANT, ROBERT J
• Application Number:
  US13/384,039
• Publication Number:
  US 20120119700A1
• Time in Patent Office: 2,038 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: A61N 1/37229 Shape or location of the implanted or external antenna
• CPC Class Codes: A61N 1/3787 from an external energy source
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 2310/23 The load being a medical device, a medical implant, or a life supporting device
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas

Abstract

In supplying energy to a medical device implanted in a mammal patient a first coil system (20) external to the patient'"'"'s body for wirelessly transferring energy can be used that inductively cooperates with a second coil system (12) that, when implanted in the patient'"'"'s body, receives wirelessly transferred energy for supplying energy or control signals to the medical device, when implanted in the patient'"'"'s body. The first and second coil systems comprise each at least two individual coils (50, 51; 60, 61) which are not directly electrically connected to each other and operate basically independently of each other. This may give a very efficient and versatile transfer of energy or control signals. The coils in each of the coil systems can be operating at different frequencies by being connected to respective electric circuits, where each of these respective electric circuits operate basically independently of each other generating e.g. alternating electric current of different frequencies.

Claims

1. Apparatus for supplying energy to a medical device implanted in a mammal patient, the apparatus comprising:

a first coil system external to the patient′

Ls body for wirelessly transmitting energy for powering the medical device,

a second coil system that, when implanted in the patients body, receives wirelessly transferred energy for supplying energy or control signals to the medical device, when implanted in the patients body,

wherein at least one of the first and second coil systems comprise a plurality of individual coils which in terms of frequency tuned energy supply operate basically independently of each other, for improving energy transmitting capacity, when implanted,

wherein two or more coils in the first coil system and two or more coils in the second coil system are adapted to cause a transfer of energy from outside the body to the inside thereof, for powering the medical device,

wherein each of said plurality of individual coils are tuned with a capacitor connected in parallel over the coil,

wherein at least one first coil in the first coil system and at least one second coil in the second coil system are tuned to a first frequency, and

wherein at least one third coil in the first coil system and at least one fourth coil in the second coil system, are tuned to a second frequency being a different frequency than the first frequency.

2. The apparatus of claim 1, wherein each of said plurality of individual coils are connected to a respective electric circuit, each of these respective electric circuits operating basically independently of each other.

3. The apparatus of claim 1, wherein each of said plurality of individual coils are connected to a respective electric circuit generating an alternating electric current, the currents generated for different coils having different frequencies.

4. The apparatus of claim 1, wherein each of said plurality of individual coils are connected to electric circuits are connected to a respective electric circuit for receiving on different frequencies.

5. The apparatus of claim 1, wherein each of said plurality of individual coils are connected to one common electric circuit, handling the different tuned frequency supplies of energy.

6. The apparatus of claim 5, wherein each of said plurality of individual coils are connected the electric circuit generating an alternating electric current;

the currents generated for different coils having different frequencies.

7. The apparatus of claim 1, wherein each of said plurality of individual coils are connected to one common electric circuit for receiving on different frequencies.

8. The apparatus of claim 5, wherein each of said plurality of individual coils are connected to different rectifiers of the electric circuit for receiving on different frequencies.

9. The apparatus of claim 8, wherein said different rectifiers and the electric circuit is adapted to supply energy to two different batteries for indirect energy supply, the batteries connected in series after each other.

10. The apparatus of claim 8, wherein the different rectifiers are integrated in one electronic circuit solution for one energy supply.

11. The apparatus of claim 1, wherein at least one of the following alternatives apply:

the first coil in the first coil system is tuned to the same frequency as the second coil and at least one more coil in the second coil system,

the second coil in the second coil system is tuned to the same frequency as the first coil and at least one more coil in the first coil system.

12. The apparatus of claim 1, wherein said plurality of individual coils include toroidal coils having toroidal axes having the shapes of closed curves, in particular circular toroidal axes, the toroidal axes being concentric with each other.

13. The apparatus of claim 12, wherein said plurality of individual coils include toroidal coils having toroidal axes having the shapes of closed curves, in particular circular toroidal axes, the toroidal axes having different sizes or diameters, the toroidal axis of one of the coils being located inside the toroidal axis of another of the coils.

14. The apparatus of claim 1, wherein said plurality of individual coils include toroidal coils, each having the same toroidal axis.

15. The apparatus of claim 1, wherein said plurality of individual cods include toroidal coils having toroidal axes having the shapes of closed curves, the closed curves being substantially flat and located in the same plane.

16. The apparatus of claim 1, further comprising a second control unit that, when implanted in the patients body, is connected to the second coil system so as to receive energy or control signals from the second coil system or to provide information signals to the second coil system for transmission to the first coil system.

17. The apparatus of claim 16, further comprising a first control unit that is located outside the patient'"'"'s body and is connected to the first coil system and

that generates energy or control signals for transfer to the second coil system or receives information signals transmitted from the second coil system.

18. The apparatus of claim 17, wherein the signal generated by the first control unit is an alternating current that flows through at least one of the coils included in the first coil system, and wherein the energy wirelessly received by one of the coils of the second coil system is carried by an alternating magnetic field, which is

created by the alternating current flowing in said at least one of the coils included in the first coil system and which induces an alternating voltage in said one of the coils of the second coil system.

19. The apparatus of claim 18, wherein the alternating voltage induced in said one of the coils of the second coil system causes an electric current to flow to a load circuit connected to said one of the coils of the second coil system,

so as to

transfer energy from said at least one of the coils included in the first coil system through said one of the coils of the second coil system to the load circuit connected to said one of the coils of the second coil system.

20. The apparatus of claim 19, wherein the load circuit is a power supply that, when implanted in the patients body, supplies energy to the implanted medical device.