System of inductive power transfer

• US 9,837,827 B2
• Filed: 12/04/2014
• Issued: 12/05/2017
• Est. Priority Date: 06/05/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Powermat Technologies, Ltd.
• Inventors: Ben-Shalom, Amir
• Primary Examiner(s): LUU, AN T
• Application Number:
  US14/560,189
• Publication Number:
  US 20150084430A1
• Time in Patent Office: 1,097 Days
• Field of Search: 307104, 320108
• 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 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

An inductive power transmitter comprises a first primary inductor configured to inductively couple a first secondary inductor and configured to hold a first variable electrical potential. The transmitter also comprises a second primary inductor configured to inductively couple a second secondary inductor that is configured to hold a second variable electrical potential. The primary inductors are arranged in an overlapping fashion on a substrate forming a charging surface. The first primary inductor is connected to a first driver capable of providing the first variable electrical potential, and the second primary inductor is connected to a second driver capable of providing the second variable electrical potential in a first embodiment while a second possibility is that the first primary inductor is connected to a first driver capable of providing the first variable electrical potential, and the second primary inductor comprises capacitor and is not connected to a driver.

Claims

1. An inductive power transmitter comprising:

at least one first primary inductor configured to couple inductively with at least one first secondary inductor and configured to hold a first variable electrical potential, and

at least one second primary inductor configured to couple inductively with at least one second secondary inductor and configured to hold a second variable electrical potential,

wherein the first primary inductor and the second primary inductor are arranged in an overlapping fashion on a substrate forming a charging surface, and

wherein the first variable electrical potential differs from the second variable electrical potential according to a parameter selected from the group consisting of a phase, a driving frequency, and a combination thereof wherein the first primary inductor is connected to a first driver capable of providing said first variable electrical potential, and the second primary inductor is connected to a second driver capable of providing said second variable electrical potential.

2. The inductive power transmitter of claim 1, wherein the first primary inductor and the second primary inductor comprise a series of parallel segments connected in series in a square wave-like pattern, and

wherein the first primary inductor and the second primary inductor are arranged such that the parallel segments of the first primary inductor and the second primary inductor alternate along one axis along the charging surface.

3. The inductive power transmitter of claim 1, wherein, simultaneously, the first primary inductor is holding the first variable electrical potential and the second primary inductor is holding the first variable electrical potential.

4. The inductive power transmitter of claim 1 capable of transmitting power from any location of said charging surface.

5. The inductive power transmitter of claim 1 comprising a plurality of charging surfaces.

6. The inductive power transmitter of claim 5, wherein the first primary inductor of a first charging surface is electrically connected to the first primary inductor of the remaining charging surfaces.

7. The inductive power transmitter of claim 6, wherein the second primary inductor of a first charging surface is electrically connected to the second primary inductor of the remaining charging surfaces.

8. The inductive power transmitter of claim 5, wherein each of the plurality of second primary inductors comprises at least one capacitor.

9. An inductive power transmitter comprising:

at least one first primary inductor configured to couple inductively with at least one first secondary inductor and configured to hold a first variable electrical potential, and

at least one second primary inductor configured to couple inductively with at least one second secondary inductor and configured to hold a second variable electrical potential,

wherein the first primary inductor and the second primary inductor are arranged in an overlapping fashion on a substrate forming a charging surface, and

wherein the first variable electrical potential differs from the second variable electrical potential according to a parameter selected from the group consisting of a phase, a driving frequency, and a combination thereof, wherein the first primary inductor is connected to a first driver capable of providing said first variable electrical potential, and the second primary inductor comprises at least one capacitor and is not connected to a driver.

10. The inductive power transmitter of claim 9, wherein the first primary inductor and the second primary inductor comprise a series of parallel segments connected in series in a square wave-like pattern, and

wherein the first primary inductor and the second primary inductor are arranged such that the parallel segments of the first primary inductor and the second primary inductor alternate along one axis along the charging surface.

11. The inductive power transmitter of claim 9, wherein, simultaneously, the first primary inductor is holding the first variable electrical potential and the second primary inductor is holding the first variable electrical potential.

12. The inductive power transmitter of claim 9 capable of transmitting power from any location of said charging surface.

13. The inductive power transmitter of claim 9 comprising a plurality of charging surfaces.

14. The inductive power transmitter of claim 12, wherein the first primary inductor of a first charging surface is electrically connected to the first primary inductor of the remaining charging surfaces.

15. The inductive power transmitter of claim 13, wherein the second primary inductor of a first charging surface is electrically connected to the second primary inductor of the remaining charging surfaces.

16. The inductive power transmitter of claim 12, wherein each of the plurality of second primary inductors comprises at least one capacitor.