A DEVICE WITH A RECEIVING ANTENNA AND A RELATED POWER TRANSFER SYSTEM

• US 20170244287A1
• Filed: 09/30/2015
• Published: 08/24/2017
• Est. Priority Date: 10/17/2014
• Status: Active Grant

• Current Assignee: Synoste Oy (Globus Medical, Inc.)
• Original Assignee: Synoste Oy (Globus Medical, Inc.)
• Inventors: HAAJA, Juha Kalevi, SALDEN, Kevin Lambertus Hubertus, HALLILA, Harri Olavi, DUARTE, Jorge Luiz, RITVANEN, Antti Gabriel
• Granted Patent: US 10,511,193 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 1/00029 externally powered, e.g. wireless
• CPC Class Codes: A61B 17/7216 for bone lengthening or compression A61B17/7258 takes precedence
• CPC Class Codes: A61B 2017/00411 actuated by application of energy from an energy source outside the body
• CPC Class Codes: A61B 2018/00565 Bone
• CPC Class Codes: A61B 90/98 using electromagnetic means, e.g. transponders
• CPC Class Codes: A61N 1/3787 from an external energy source
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 1/248 provided with an AC/DC converting device, e.g. rectennas
• CPC Class Codes: H01Q 7/08 Ferrite rod or like elongated core
• 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 50/12 of the resonant type

Abstract

The present invention is about a device with a receiving antenna (110), wherein the receiving antenna (110) comprises a secondary coil (112), and being arranged for inductively connecting to a transmitting antenna (200) comprising a primary coil (202). The device of the invention is characterized in that the receiving antenna (110) further comprises a tertiary coil (114) arranged to have connection to a load in the device; and a capacitor (142) to which the secondary coil (112) is connected; and there is an encapsulation (120) comprising a low liquid permeability and non-conductive material encapsulating at least a part of the receiving antenna (110). Additionally, the present invention is about a power transfer system.

Claims

1. A device with a receiving antenna (110), wherein the receiving antenna (110) comprises a secondary coil (112), and being arranged for inductively connecting to a transmitting antenna (200) comprising a primary coil (202);

characterized in that

the receiving antenna (110) further comprises;

a tertiary coil (114) arranged to have connection to a load in the device; and

a capacitor (142) to which the secondary coil (112) is connected;

and there is an encapsulation (120) comprising a low liquid permeability and non-conductive material encapsulating at least a part of the receiving antenna (110) such that the windings of the tertiary coil (114) are outside the encapsulation (120).

2. The device of any one of the preceding claims, wherein in the receiving antenna (110), there is an element (118) including ferromagnetic material, for focusing the magnetic field of the transmitting antenna (200) into the receiving antenna (110).

3. The device of the claim 2, wherein the secondary coil (112) is arranged to couple to the tertiary coil (114) through the element (118) for creating a transformer between the secondary coil (112) and the tertiary coil (114).

4. The device of any one of the preceding claims, wherein the secondary coil (112) and the capacitor (142) constitute a secondary circuit and the encapsulation (120) is arranged to encapsulate substantially the complete secondary circuit with the element (118) constituting one package.

5. The device of any one of the claims 1-3, wherein the encapsulation (120) is arranged to encapsulate substantially the complete receiving antenna and to have hermetic vias for the connection to the load.

6. The device of any one of the preceding claims, wherein the secondary coil (112) and the tertiary coil (114) are arranged concentric one upon the other such that they couple.

7. The device of any one of the claims 1-5, wherein the secondary coil (112) and the tertiary coil (114) are arranged next to each other such that they couple.

8. The device of any one of the preceding claims, wherein the said low liquid permeability and non-conductive material of the encapsulation (120) comprises one of ceramics and plastic.

9. The device of any one of the preceding claims, wherein the receiving antenna (110) is arranged to resonate substantially at the same frequency as the transmitting antenna (200).

10. The device of any one of the preceding claims, wherein there is a further casing enclosing the entire receiving antenna (110).

11. The device of any one of the preceding claims, wherein at least one of the encapsulation (120) and the casing includes an ultrasonic or laser welding for preventing any leakage.

12. A power transfer system including a transmitting antenna (200) and a device of the claim 1 located such that they are inductively connected.